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how to regulate variable dc voltage by chopper circuit or other ways?

2023-06-08t06:32:16z

i'm going to do my thesis titled "regulation of electric power for a unique riverine hydrokinetic energy system." i'm now looking for a simulink model to regulate variable dc output (comes from a converter/rectifier) using a chopper circuit or any other ways. then this regulated dc voltage will be sent to a inverter to be converted into 3-phase ac voltage. please help me with this if there is any simulink model for this problem. also, please share if you have any idea to resolve this problem. thanks in advance.

wlanhdlreceiver use only 64 sample to do fine symbol timming. is it enough for 40m, 80m and 16mhz wlan signal?

2023-06-08t06:26:19z

i am learning on the wlanhdlreceiver hdl design. the design uses 64 data to do fine symbol timing. but in matlab .m reference design, it uses entire lltf signal to do fine symbol timing. it means for 40mhz, or 80mhz wlan signal, it will use 128 or 256 samples. do you think the wlanhdlreceiver taking only 64 sample to do fine symbol timing will have performance issue at 40m, 80m, or 160mhz wlan signal?

how to read data type conversion block name using mscript

2023-06-08t06:19:36z

how to read data type conversion block name using mscript i used the below script but it was not working blockpaths = find_system('h217a_power_supply','type','data type conversion');

how in simulink send one signal from an input to one of several outputs according to a given output number?

2023-06-08t05:59:58z

simulink has a "multi-port switch" element that can be used to switch one of the inputs to a single output. it is necessary to solve the inverse problem: to switch the only input signal to the selected output of 10 possible. how it is better to implement it? ps the option with element "output switch" does not work. error "invalid connection between message and signal ports"

how do i turn the rankine cycle simscape model example provided by mathlab into organic rankine cycle to use different fluid properties other than water

2017-11-01t02:08:24z

-i ran ssc_rankine_cycle -i changed 'steam properties block' into fluid properties -with the help of 2-phase fluid tables, i filled in the fluid property block with properties of benzene -now i need to change p_initial and t_initial of all the blocks through trial and error in order to avoid simulation errors -is there a better way of simulating different fluid properties in this model without much hassle?

use of fminimax function to solve minimax game

2023-06-05t10:49:39z

when i am using the fminimax function i am getting the same answer when i provide the different values of lambda. i have defined my utility function as different .m file. �fine the parameters and constants n = 5; % number of rows m = 4; % number of columns % define the matrices r, p, and d (example values) r0= [1, 1, 1, 1; 1, 1, 1, 1; 1, 1, 1, 1; 1, 1, 1, 1; 1, 1, 1, 1]; % n x m matrix lambda= [0.02, 0.02, 0.02, 0.02; 0.02, 0.02, 0.02, 0.02; 0.02, 0.02, 0.02, 0.02; 0.02, 0.02, 0.02, 0.02; 0.02, 0.02, 0.02, 0.02]; % n x m matrix d= [33, 38, 5, 38; 2, 15, 3, 4; 19, 29, 13, 7; 7, 45, 43, 19; 25, 22, 15, 25]; c0=[299, 253, 196, 227, 204]; initial guess u=utility_3(r0,lambda,c0,d,n,m); f=@utility_3; lb = [0,0,0,0,0]; % lower bounds ub = [300,300,300,300,300]; % upper bounds aeq=[1,1,1,1,1]; %coefficient vector of ci beq=[394]; %budget [c, fval,maxfval,output] = fminimax(f, c0, [], [], aeq, beq, lb, ub); % print the optimal solution and objective value disp('allocation:'); disp(c); disp('expected loss:'); disp(fval); disp('maximum expected loss and attack strategy'); disp(max(fval,[],2));

old simulink models wont run in 2023a, requires aerospace toolbox, did not before

2023-06-07t17:15:51z

all older versions of our simulink model do not run in 2023a due to wanting aerospace toolbox. we do not have that tool box and we have never had it. we have not changed the simulink model. how can i get my model functional again? i have tried openeing in 2023a and saving to older format and repoening but it still flags the blocks as needing aerospace blockset/toolbox. thank you very much!

sysgen license checkout failed.

2019-12-31t21:38:15z

i am working on xilinx system generator. i get an error when run my simulink block- sysgen license checkout failed. xilinxd_license_file = d:\xilinx\2017_xilinx\xilinx.lic;c:/xilinx/vivado/2017.4/data/sysgen/hwcosim_compiler/pp_ethernet lm_license_file = xilinx license search path: c:\users\sandip\appdata\roaming\xilinxlicense;c:\.xilinx;d:\xilinx\2017_xilinx\xilinx.lic;c:\xilinx\vivado\2017.4\data\sysgen\hwcosim_compiler\pp_ethernet;xilinx;c:\xilinx\vivado\2017.4\data\ipcore_licenses i have already go through the xilinix manage license tab and reset the license path...but still got the error..please solve the error

error during gan training : render process terminated: null java.lang.nosuchfielderror: ts_process_oom

2023-06-08t04:19:40z

the following error occurred during gan training: error message: render process terminated: null java.lang.nosuchfielderror: ts_process_oom --detailed information-- system: hp z4 workstation, memory: 128gb, ssd: 1tb (50% is available) operating system: windows 10, 64-bit matlab version: r2022b java heap space: 32.697gb execution file: example file from matlab, traingenerativeadversarialnetwork(gan)example i think java heat space is enough because the system memory usage is below 20gb and java heap space setting is over 32gb. please, let me know how to solve this problem.

eigen value of stochastic matrix

2023-06-05t14:34:27z

i wan to find eigen values and eigen vector of a stochastic matrix using newton raphson method. % define the dimensions and variables n = 3; % size of vectors and matrices m = 2; % number of matrices p = 4; % number of eigenvalues and tensors maxiterations = 100; % maximum number of iterations tolerance = 1e-6; % tolerance for convergence % initialize variables u = ones(n*p, 1); % initial guess for u, each column represents u1, u2, ..., up lambda = ones(p, 1); % initial guess for lambda, each element represents lambda1, lambda2, ..., lambdap % define the matrices and tensors c0 = eye(p); % example: identity matrix a0 = magic(n); % example: identity matrix c = rand(p, p, m); % example: random p x p x m tensor a = rand(n, n, m); % example: random n x n x m tensor e = rand(p, p, p); % example: random p x p x p tensor ca=0; for i=1:m ca= ca kron(c(:,:,i),a(:,:,i)); end % perform newton-raphson iteration for iter = 1:maxiterations % compute the left-hand side of the equation lhs = (kron(c0 , a0) ca) * u; % compute the right-hand side of the equation lame=0; for p = 1:p lame = lame kron(lambda(p) * e(:, :, p),eye(n)) ; end rhs=lame*u % compute the residual and check for convergence residual_1 = lhs - rhs; %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % initialize the variables i=eye(n,n); ca1=zeros(p,1); for i=1:p ca1(i)= u'*kron(e(:,:,i),i)*u; end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% residual_2=ca1; % compute the residual and check for convergence residual = [residual_1;residual_2]; if norm(residual(:)) < tolerance disp('converged!'); break; end jacobian = jac_1(a,lambda , u, n,m,p); % update u and lambda using the newton-raphson method delta = jacobian \ residual(:); u = u - delta(1:n*p); lambda = lambda - delta(n*p 1:end); % display the current iteration and residual disp(['iteration: ' num2str(iter) ', residual: ' num2str(norm(residual(:)))]); end uf=reshape(u,n,[]) lambdaf=lambda but the answer i am getting is lambdaf = 1.0e 58 * 2.7709 -1.9052 0.3483 -0.3253. it would be very helpful if someone help me improve this code

how can i interface my texas instrument dsp with available can communication through simulink

2023-06-08t03:13:11z

hello all, i have a tif28379d board that is operating an motor drive. there is can interface in the motordrive. is it possible to control the can or establish link through simulink with can and dsp at the same time? the can communication supports national instrument driver. thanks for the help. ashik

java.lang.illegalargumentexception: ntfs ads separator (':') in file name is forbidden

2022-02-08t09:34:56z

when i perform coder with single precision conversion using fixed point designer, during mex building, following errors happn.but when i perform coder without precision conversion, no error happens. how can i fix this problem? exception in thread "awt-eventqueue-0": java.lang.illegalargumentexception: ntfs ads separator (':') in file name is forbidden. at org.apache.commons.io.filenameutils.indexofextension(filenameutils.java:746) at org.apache.commons.io.filenameutils.getextension(filenameutils.java:1069) at com.mathworks.toolbox.coder.nide.editor.coderfilebackingstore.(coderfilebackingstore.java:38) at com.mathworks.toolbox.coder.nide.editor.coderfilebackingstore.(coderfilebackingstore.java:30) at com.mathworks.toolbox.coder.nide.nideartifactset.addsourceartifact(nideartifactset.java:69) at com.mathworks.toolbox.coder.nide.impl.codernidefacade.updateartifactset(codernidefacade.java:339) at com.mathworks.toolbox.coder.nide.impl.codernidefacade.initfilestomodel(codernidefacade.java:304) at com.mathworks.toolbox.coder.nide.impl.codernidefacade.access$800(codernidefacade.java:63) at com.mathworks.toolbox.coder.nide.impl.codernidefacade$4.propertychange(codernidefacade.java:207) at java.beans.propertychangesupport.fire(propertychangesupport.java:335) at java.beans.propertychangesupport.firepropertychange(propertychangesupport.java:327) at java.beans.propertychangesupport.firepropertychange(propertychangesupport.java:263) at com.mathworks.toolbox.coder.nide.impl.codernideappmodel.fireinputfileschanged(codernideappmodel.java:175) at com.mathworks.toolbox.coder.nide.impl.codernideappmodel.setinputfiles(codernideappmodel.java:171) at com.mathworks.toolbox.coder.wfa.build.verifycompatibilitymodel$normalmexbuilder$1.handlefiles(verifycompatibilitymodel.java:534) at com.mathworks.toolbox.coder.wfa.build.coderbuildmanager$handler$1.run(coderbuildmanager.java:250) at com.mathworks.mwswing.mjutilities.runoneventdispatchthread(mjutilities.java:911) at com.mathworks.toolbox.coder.wfa.build.coderbuildmanager$handler.buildfinished(coderbuildmanager.java:247) at com.mathworks.toolbox.coder.wfa.build.buildcommand$1$1.run(buildcommand.java:211) at java.awt.event.invocationevent.dispatch(invocationevent.java:311) at java.awt.eventqueue.dispatcheventimpl(eventqueue.java:758) at java.awt.eventqueue.access$500(eventqueue.java:97) at java.awt.eventqueue$3.run(eventqueue.java:709) at java.awt.eventqueue$3.run(eventqueue.java:703) at java.security.accesscontroller.doprivileged(native method) at java.security.protectiondomain$javasecurityaccessimpl.dointersectionprivilege(protectiondomain.java:74) at java.awt.eventqueue.dispatchevent(eventqueue.java:728) at java.awt.eventdispatchthread.pumponeeventforfilters(eventdispatchthread.java:205) at java.awt.eventdispatchthread.pumpeventsforfilter(eventdispatchthread.java:116) at java.awt.eventdispatchthread.pumpeventsforhierarchy(eventdispatchthread.java:105) at java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:101) at java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:93) at java.awt.eventdispatchthread.run(eventdispatchthread.java:82)

visadev autoly continously send 'idn?'. get thousands of lines of the return of 'idn?'

2023-06-08t02:32:23z

i have a optical spetrum whose name is ando aq6317. after use ni gpib-usb-hs connect it with my windows server, with matlab 2021b and a package of i"nstrument control toolbox support package for national instruments visa and icp interfaces 21.2.1". i use the v = visadev('gpib0::1::0::instr') can successfully coonect. but the problem is, the device will repeatedly send the instrument info string. with thousands of lines, times. the content is the same as the querying output of "*idn?". and i can see the v.numbytesavailable exponentially surge. within the time i did nothing. i use read(v,v.numbytesavailable,"char") to watch and everything is the querying output of '*idn?' so i really doubt that the visadev has a bug of autoly continously send '*idn?'. other instruments like keysight awg 8194 i tried, tek osc or awg will not occur this problem. how to do??? although i found use old method g1=gpib('ni',0, 1); can avoid the bug. but i do not wanna write two type of visa codes. for my previous codes are all based on visadev!!!!!!!!!!!!

is it possible to make windows desktop pc to a master host for ethercat network?

2023-06-08t02:17:47z

i want to control 3 actuators (orientalmotor) using an orientalmotor multi-axis driver that works with ethercat, and i'm trying to make a hils approach using simulink. for this case, i was thinking on using a speedgoat device as slave. my question lies in how can i make my desktop pc into a master device that runs with ethercat network in order to control these actuators?

matlab coder returning non specific issue description during check for runtime issues step

2023-06-07t23:57:06z

hello, for use in a student project, i am attempting to convert an audio-based transmitter/receiver function from matlab to c/cpp. i went through the process of correcting various issues, brought up by the matlab coder tool. however, the latest issue brought up by the "check for run-time issues" step does not mention any line / sub-function in the code. instead, it simply states: " insufficient number of outputs from right hand side of equal sign to satisfy assignment. use help codegen for more information on using this command. insufficient number of outputs from right hand side of equal sign to satisfy assignment." i do not know where in the code this issue is located, and given the project size, i would prefer not to start looking with no clear leads. the function i am trying to convert is running correctly, and no issues are found before the runtime issues check (input types, %#codegen, etc.). any help in accessing a more detailed error message / pointing me in the right direction would be greatly appreciated. thanks (: jonathan

how do i add a unique id to the the graph in can explorer in the vehicle network toolbox?

2023-06-07t23:29:08z

hello! i pulled some can data into vehicle network toolbox/can explorer and was hoping to be able to visualize it using the graph. i found a video on how to add a signal to the graph but it involved having a dbc file (and i didn't see an example document/format of how i would create said dbc file). is there a way to add a signal to the graph any other way? i tried going through the menus and couldn't find a way to do it and dragging/dropping, and right clicking don't seem to get me anywhere either. any info on how i can take a signal and add it to a graph would be greatly appreciated. if there's not an easy way to do so (that might be a feature request at that point), is there an example dbc format or can i see an example if i wanted to add, say, signals with ids for 0x18d, 0x224, and 0x27a (i have a bunch i want to add but once i see an example, i can put one together myself)? thanks!

setting up graphic user interface

2023-06-07t21:51:14z

as i have never set up a gui interface i am trying to find out how to do all the call backs correctly. i have included the program i wrote in script editor and the gui code program and a screen shot of the design of the gui. my question is can the radio buttons be used with the code i wrote in editor with all the different loops that i have and if so how do i do that code? if the radio buttons can not work that way is there a better choice? %program in editor clear clc f=input('gasoline or diesel: ','s'); c=input('number of engine cylinders '); t=input('trailer being towed yes or no: ','s'); tw=input('trailer weight '); m=input('trip length in miles '); c=input('cost of fuel per gallon '); switch f case 'gasoline' if c==4 bmpg=24; switch t case 'yes' if tw<=2000 mpg=bmpg-(bmpg*0.2); elseif tw>2000 fprintf('exceedes truck weight limit '); end case 'no' mpg=24; end elseif c==6 bmpg=18; switch t case 'yes' if tw<=2000 mpg=bmpg-(bmpg*0.1); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.2); elseif tw>4000 fprintf('exceedes truck weight limit '); end case 'no' mpg=18; end elseif c==8 bmpg=12; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.05); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.1); elseif tw>4000 && tw<=6000 mpg=bmpg-(bmpg*0.2); elseif tw>6000 && tw<=8000 mpg=bmpg-(bmpg*0.4); elseif tw>8000 fprintf('exceedes truck weight limit '); end case'no' mpg=12; end end case 'diesel' if c==4 bmpg=26; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.05); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.1); elseif tw>4000 fprintf('exceedes truck weight limit '); end case 'no' mpg=26; end elseif c==6 bmpg=22; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.025); elseif tw>2000 && tw<=4000 mpg=bmpg-(mbpg*0.5); elseif tw>4000 && tw<=6000 mpg=bmpg-(bmpg*0.1); elseif tw>6000 && tw<=8000 mpg=bmpg-(bmpg*0.2); elseif tw>8000 fprintf('exceedes truck weight limit '); end case'no' mpg=22; end elseif c==8 bmpg=18; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.0125); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.05); elseif tw>4000 && tw<=6000 mpg=bmpg-(bmpg*0.2); elseif tw>6000 && tw<=8000 mpg=bmpg-(bmpg*0.4); elseif tw>8000 && tw<10000 mpg=bmpg-(bmpg*0.6); elseif tw>10000 fprintf('exceedes truck weight limit '); end case'no' mpg=18; end end end fprintf('miles per gallon') disp(mpg) g=(m/mpg);%%how many gallons used fprintf('how many gallons of fuel used') disp(g) cf=g*c;%%cost to fuel up fprintf('cost to fuel up') disp(cf) cm=(g/m)*c;%%cost per mile fprintf('cost per mile') disp(cm) x=cf:1:cm; y=bmpg:1:mpg; %gui program classdef jonpagelsprojectgui < matlab.apps.appbase % properties that correspond to app components properties (access = public) uifigure matlab.ui.figure gridlayout matlab.ui.container.gridlayout leftpanel matlab.ui.container.panel editfield matlab.ui.control.numericeditfield numberofenginecylindersbuttongroup matlab.ui.container.buttongroup button_8 matlab.ui.control.radiobutton button_6 matlab.ui.control.radiobutton button_4 matlab.ui.control.radiobutton trailertowedbuttongroup matlab.ui.container.buttongroup nobutton matlab.ui.control.radiobutton yesbutton matlab.ui.control.radiobutton fueltypebuttongroup matlab.ui.container.buttongroup dieselbutton matlab.ui.control.radiobutton gasolinebutton matlab.ui.control.radiobutton tripinmileseditfield matlab.ui.control.numericeditfield tripinmileseditfieldlabel matlab.ui.control.label trailerweighteditfield matlab.ui.control.numericeditfield trailerweighteditfieldlabel matlab.ui.control.label costpergallonslider matlab.ui.control.slider costpergallonsliderlabel matlab.ui.control.label centerpanel matlab.ui.container.panel plotbutton matlab.ui.control.button calculatebutton matlab.ui.control.button rightpanel matlab.ui.container.panel costmileeditfield matlab.ui.control.numericeditfield costmileeditfieldlabel matlab.ui.control.label costtofuelupeditfield matlab.ui.control.numericeditfield costtofuelupeditfieldlabel matlab.ui.control.label gallonsofusedfueleditfield matlab.ui.control.numericeditfield gallonsofusedfueleditfieldlabel matlab.ui.control.label milesgalloneditfield matlab.ui.control.numericeditfield milesgalloneditfieldlabel matlab.ui.control.label uiaxes matlab.ui.control.uiaxes end % properties that correspond to apps with auto-reflow properties (access = private) onepanelwidth = 576; twopanelwidth = 768; end % callbacks that handle component events methods (access = private) % value changed function: costpergallonslider function costpergallonslidervaluechanged(app, event) c = app.costpergallonslider.value; app.editfield.value=c; end % selection changed function: fueltypebuttongroup function fueltypebuttongroupselectionchanged(app, event) f=app.fueltypebuttongroup.selectedobject; switch f case app.gasolinebutton case app.dieselbutton end end % selection changed function: numberofenginecylindersbuttongroup function numberofenginecylindersbuttongroupselectionchanged(app, event) c = app.numberofenginecylindersbuttongroup.selectedobject; switch c case app.button_4 case app.button_6 case app.button_8 end end % value changed function: trailerweighteditfield function trailerweighteditfieldvaluechanged(app, event) tw = app.trailerweighteditfield.value; end % value changed function: tripinmileseditfield function tripinmileseditfieldvaluechanged(app, event) m = app.tripinmileseditfield.value; end % button pushed function: calculatebutton function calculatebuttonpushed(app, event) m = app.tripinmileseditfield.value; tw = app.trailerweighteditfield.value; f=app.fueltypebuttongroup.selectedobject; t = app.trailertowedbuttongroup.selectedobject; switch f case 'gasoline' case c==4 bmpg=24; switch t case 'yes' if tw<=2000 mpg=bmpg-(bmpg*0.2); elseif tw>2000 fprintf('exceedes truck weight limit '); end case 'no' mpg=24; end case c==6 bmpg=18; switch t case 'yes' if tw<=2000 mpg=bmpg-(bmpg*0.1); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.2); elseif tw>4000 fprintf('exceedes truck weight limit '); end case 'no' mpg=18; end case c==8 bmpg=12; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.05); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.1); elseif tw>4000 && tw<=6000 mpg=bmpg-(bmpg*0.2); elseif tw>6000 && tw<=8000 mpg=bmpg-(bmpg*0.4); elseif tw>8000 fprintf('exceedes truck weight limit '); end case'no' mpg=12; end end case 'diesel' case c==4 bmpg=26; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.05); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.1); elseif tw>4000 fprintf('exceedes truck weight limit '); end case 'no' mpg=26; end case c==6 bmpg=22; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.025); elseif tw>2000 && tw<=4000 mpg=bmpg-(mbpg*0.5); elseif tw>4000 && tw<=6000 mpg=bmpg-(bmpg*0.1); elseif tw>6000 && tw<=8000 mpg=bmpg-(bmpg*0.2); elseif tw>8000 fprintf('exceedes truck weight limit '); end case'no' mpg=22; end case c==8 bmpg=18; switch t case'yes' if tw<=2000 mpg=bmpg-(bmpg*0.0125); elseif tw>2000 && tw<=4000 mpg=bmpg-(bmpg*0.05); elseif tw>4000 && tw<=6000 mpg=bmpg-(bmpg*0.2); elseif tw>6000 && tw<=8000 mpg=bmpg-(bmpg*0.4); elseif tw>8000 && tw<10000 mpg=bmpg-(bmpg*0.6); elseif tw>10000 fprintf('exceedes truck weight limit '); end case'no' mpg=18; end end end app.milesgalloneditfield.value=mpg; app.gallonsofusedfueleditfield.value=g; app.costmileeditfield.value=cm; app.costtofuelupeditfield.value=cf; end % selection changed function: trailertowedbuttongroup function trailertowedbuttongroupselectionchanged(app, event) t = app.trailertowedbuttongroup.selectedobject; switch t case app.yesbutton case app.nobutton end end % value changed function: milesgalloneditfield function milesgalloneditfieldvaluechanged(app, event) app.milesgalloneditfield.value=mpg; end % value changed function: gallonsofusedfueleditfield function gallonsofusedfueleditfieldvaluechanged(app, event) app.gallonsofusedfueleditfield.value=g; end % value changed function: costtofuelupeditfield function costtofuelupeditfieldvaluechanged(app, event) app.costtofuelupeditfield.value=cf; end % value changed function: costmileeditfield function costmileeditfieldvaluechanged(app, event) app.costmileeditfield.value=cm; end % changes arrangement of the app based on uifigure width function updateapplayout(app, event) currentfigurewidth = app.uifigure.position(3); if(currentfigurewidth <= app.onepanelwidth) % change to a 3x1 grid app.gridlayout.rowheight = {517, 517, 517}; app.gridlayout.columnwidth = {'1x'}; app.centerpanel.layout.row = 1; app.centerpanel.layout.column = 1; app.leftpanel.layout.row = 2; app.leftpanel.layout.column = 1; app.rightpanel.layout.row = 3; app.rightpanel.layout.column = 1; elseif (currentfigurewidth > app.onepanelwidth && currentfigurewidth <= app.twopanelwidth) % change to a 2x2 grid app.gridlayout.rowheight = {517, 517}; app.gridlayout.columnwidth = {'1x', '1x'}; app.centerpanel.layout.row = 1; app.centerpanel.layout.column = [1,2]; app.leftpanel.layout.row = 2; app.leftpanel.layout.column = 1; app.rightpanel.layout.row = 2; app.rightpanel.layout.column = 2; else % change to a 1x3 grid app.gridlayout.rowheight = {'1x'}; app.gridlayout.columnwidth = {475, '1x', 378}; app.leftpanel.layout.row = 1; app.leftpanel.layout.column = 1; app.centerpanel.layout.row = 1; app.centerpanel.layout.column = 2; app.rightpanel.layout.row = 1; app.rightpanel.layout.column = 3; end end end % component initialization methods (access = private) % create uifigure and components function createcomponents(app) % create uifigure and hide until all components are created app.uifigure = uifigure('visible', 'off'); app.uifigure.autoresizechildren = 'off'; app.uifigure.position = [100 100 970 517]; app.uifigure.name = 'matlab app'; app.uifigure.sizechangedfcn = createcallbackfcn(app, @updateapplayout, true); % create gridlayout app.gridlayout = uigridlayout(app.uifigure); app.gridlayout.columnwidth = {475, '1x', 378}; app.gridlayout.rowheight = {'1x'}; app.gridlayout.columnspacing = 0; app.gridlayout.rowspacing = 0; app.gridlayout.padding = [0 0 0 0]; app.gridlayout.scrollable = 'on'; % create leftpanel app.leftpanel = uipanel(app.gridlayout); app.leftpanel.foregroundcolor = [1 0 0]; app.leftpanel.backgroundcolor = [0.8 0.8 0.8]; app.leftpanel.layout.row = 1; app.leftpanel.layout.column = 1; % create costpergallonsliderlabel app.costpergallonsliderlabel = uilabel(app.leftpanel); app.costpergallonsliderlabel.horizontalalignment = 'right'; app.costpergallonsliderlabel.fontcolor = [1 0.4118 0.1608]; app.costpergallonsliderlabel.position = [5 39 83 22]; app.costpergallonsliderlabel.text = 'cost per gallon'; % create costpergallonslider app.costpergallonslider = uislider(app.leftpanel); app.costpergallonslider.limits = [2 7.5]; app.costpergallonslider.majorticks = [2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5]; app.costpergallonslider.valuechangedfcn = createcallbackfcn(app, @costpergallonslidervaluechanged, true); app.costpergallonslider.fontcolor = [1 0.4118 0.1608]; app.costpergallonslider.position = [109 48 352 3]; app.costpergallonslider.value = 2; % create trailerweighteditfieldlabel app.trailerweighteditfieldlabel = uilabel(app.leftpanel); app.trailerweighteditfieldlabel.horizontalalignment = 'right'; app.trailerweighteditfieldlabel.fontcolor = [0.6353 0.0784 0.1843]; app.trailerweighteditfieldlabel.position = [5 176 79 22]; app.trailerweighteditfieldlabel.text = 'trailer weight'; % create trailerweighteditfield app.trailerweighteditfield = uieditfield(app.leftpanel, 'numeric'); app.trailerweighteditfield.limits = [0 12000]; app.trailerweighteditfield.valuedisplayformat = '%.0f'; app.trailerweighteditfield.valuechangedfcn = createcallbackfcn(app, @trailerweighteditfieldvaluechanged, true); app.trailerweighteditfield.fontcolor = [0.6353 0.0784 0.1843]; app.trailerweighteditfield.position = [99 176 100 22]; % create tripinmileseditfieldlabel app.tripinmileseditfieldlabel = uilabel(app.leftpanel); app.tripinmileseditfieldlabel.horizontalalignment = 'right'; app.tripinmileseditfieldlabel.fontcolor = [0 0.4471 0.7412]; app.tripinmileseditfieldlabel.position = [268 176 69 22]; app.tripinmileseditfieldlabel.text = 'trip in miles'; % create tripinmileseditfield app.tripinmileseditfield = uieditfield(app.leftpanel, 'numeric'); app.tripinmileseditfield.valuechangedfcn = createcallbackfcn(app, @tripinmileseditfieldvaluechanged, true); app.tripinmileseditfield.fontcolor = [0 0.4471 0.7412]; app.tripinmileseditfield.position = [352 176 100 22]; % create fueltypebuttongroup app.fueltypebuttongroup = uibuttongroup(app.leftpanel); app.fueltypebuttongroup.selectionchangedfcn = createcallbackfcn(app, @fueltypebuttongroupselectionchanged, true); app.fueltypebuttongroup.title = 'fuel type'; app.fueltypebuttongroup.backgroundcolor = [1 0 0]; app.fueltypebuttongroup.position = [40 405 123 76]; % create gasolinebutton app.gasolinebutton = uiradiobutton(app.fueltypebuttongroup); app.gasolinebutton.text = 'gasoline'; app.gasolinebutton.position = [11 30 69 22]; app.gasolinebutton.value = true; % create dieselbutton app.dieselbutton = uiradiobutton(app.fueltypebuttongroup); app.dieselbutton.text = 'diesel'; app.dieselbutton.position = [11 8 65 22]; % create trailertowedbuttongroup app.trailertowedbuttongroup = uibuttongroup(app.leftpanel); app.trailertowedbuttongroup.selectionchangedfcn = createcallbackfcn(app, @trailertowedbuttongroupselectionchanged, true); app.trailertowedbuttongroup.title = 'trailer towed'; app.trailertowedbuttongroup.backgroundcolor = [1 1 0]; app.trailertowedbuttongroup.position = [285 405 123 76]; % create yesbutton app.yesbutton = uiradiobutton(app.trailertowedbuttongroup); app.yesbutton.text = 'yes'; app.yesbutton.position = [11 30 58 22]; app.yesbutton.value = true; % create nobutton app.nobutton = uiradiobutton(app.trailertowedbuttongroup); app.nobutton.text = 'no'; app.nobutton.position = [11 8 65 22]; % create numberofenginecylindersbuttongroup app.numberofenginecylindersbuttongroup = uibuttongroup(app.leftpanel); app.numberofenginecylindersbuttongroup.selectionchangedfcn = createcallbackfcn(app, @numberofenginecylindersbuttongroupselectionchanged, true); app.numberofenginecylindersbuttongroup.title = 'number of engine cylinders'; app.numberofenginecylindersbuttongroup.backgroundcolor = [0.6353 0.0784 0.1843]; app.numberofenginecylindersbuttongroup.position = [143 248 167 106]; % create button_4 app.button_4 = uiradiobutton(app.numberofenginecylindersbuttongroup); app.button_4.text = '4'; app.button_4.position = [11 60 58 22]; app.button_4.value = true; % create button_6 app.button_6 = uiradiobutton(app.numberofenginecylindersbuttongroup); app.button_6.text = '6'; app.button_6.position = [11 38 65 22]; % create button_8 app.button_8 = uiradiobutton(app.numberofenginecylindersbuttongroup); app.button_8.text = '8'; app.button_8.position = [11 16 65 22]; % create editfield app.editfield = uieditfield(app.leftpanel, 'numeric'); app.editfield.position = [186 72 167 22]; % create centerpanel app.centerpanel = uipanel(app.gridlayout); app.centerpanel.layout.row = 1; app.centerpanel.layout.column = 2; % create calculatebutton app.calculatebutton = uibutton(app.centerpanel, 'push'); app.calculatebutton.buttonpushedfcn = createcallbackfcn(app, @calculatebuttonpushed, true); app.calculatebutton.backgroundcolor = [1 0.0745 0.651]; app.calculatebutton.position = [8 383 100 23]; app.calculatebutton.text = 'calculate'; % create plotbutton app.plotbutton = uibutton(app.centerpanel, 'push'); app.plotbutton.position = [8 136 100 23]; app.plotbutton.text = 'plot'; % create rightpanel app.rightpanel = uipanel(app.gridlayout); app.rightpanel.layout.row = 1; app.rightpanel.layout.column = 3; % create uiaxes app.uiaxes = uiaxes(app.rightpanel); title(app.uiaxes, 'mpg vs. cost per mile') xlabel(app.uiaxes, 'x') ylabel(app.uiaxes, 'y') zlabel(app.uiaxes, 'z') app.uiaxes.position = [6 54 316 195]; % create milesgalloneditfieldlabel app.milesgalloneditfieldlabel = uilabel(app.rightpanel); app.milesgalloneditfieldlabel.backgroundcolor = [0 0 1]; app.milesgalloneditfieldlabel.horizontalalignment = 'right'; app.milesgalloneditfieldlabel.position = [96 468 74 22]; app.milesgalloneditfieldlabel.text = 'miles /gallon'; % create milesgalloneditfield app.milesgalloneditfield = uieditfield(app.rightpanel, 'numeric'); app.milesgalloneditfield.valuechangedfcn = createcallbackfcn(app, @milesgalloneditfieldvaluechanged, true); app.milesgalloneditfield.backgroundcolor = [0 0 1]; app.milesgalloneditfield.position = [185 468 100 22]; % create gallonsofusedfueleditfieldlabel app.gallonsofusedfueleditfieldlabel = uilabel(app.rightpanel); app.gallonsofusedfueleditfieldlabel.backgroundcolor = [1 0.4118 0.1608]; app.gallonsofusedfueleditfieldlabel.horizontalalignment = 'right'; app.gallonsofusedfueleditfieldlabel.position = [96 413 111 22]; app.gallonsofusedfueleditfieldlabel.text = 'gallons of used fuel'; % create gallonsofusedfueleditfield app.gallonsofusedfueleditfield = uieditfield(app.rightpanel, 'numeric'); app.gallonsofusedfueleditfield.valuechangedfcn = createcallbackfcn(app, @gallonsofusedfueleditfieldvaluechanged, true); app.gallonsofusedfueleditfield.backgroundcolor = [1 0.4118 0.1608]; app.gallonsofusedfueleditfield.position = [222 413 100 22]; % create costtofuelupeditfieldlabel app.costtofuelupeditfieldlabel = uilabel(app.rightpanel); app.costtofuelupeditfieldlabel.backgroundcolor = [0 1 0]; app.costtofuelupeditfieldlabel.horizontalalignment = 'right'; app.costtofuelupeditfieldlabel.position = [96 362 82 22]; app.costtofuelupeditfieldlabel.text = 'cost to fuel up'; % create costtofuelupeditfield app.costtofuelupeditfield = uieditfield(app.rightpanel, 'numeric'); app.costtofuelupeditfield.valuechangedfcn = createcallbackfcn(app, @costtofuelupeditfieldvaluechanged, true); app.costtofuelupeditfield.backgroundcolor = [0 1 0]; app.costtofuelupeditfield.position = [193 362 100 22]; % create costmileeditfieldlabel app.costmileeditfieldlabel = uilabel(app.rightpanel); app.costmileeditfieldlabel.backgroundcolor = [0.4941 0.1843 0.5569]; app.costmileeditfieldlabel.horizontalalignment = 'right'; app.costmileeditfieldlabel.position = [96 307 52 22]; app.costmileeditfieldlabel.text = 'cost/mile'; % create costmileeditfield app.costmileeditfield = uieditfield(app.rightpanel, 'numeric'); app.costmileeditfield.valuechangedfcn = createcallbackfcn(app, @costmileeditfieldvaluechanged, true); app.costmileeditfield.backgroundcolor = [0.4941 0.1843 0.5569]; app.costmileeditfield.position = [163 307 100 22]; % show the figure after all components are created app.uifigure.visible = 'on'; end end % app creation and deletion methods (access = public) % construct app function app = jonpagelsprojectgui % create uifigure and components createcomponents(app) % register the app with app designer registerapp(app, app.uifigure) if nargout == 0 clear app end end % code that executes before app deletion function delete(app) % delete uifigure when app is deleted delete(app.uifigure) end end end

bad optimization of an objective nonlinear fitting

2023-06-07t17:56:05z

i have a bad understanding why this optimization does not work. i have a raw signal which is the convolution between a signal x (which i would like to find by a fitting) and signal 2 which is known. i need to optimize a convolution between a three-exponential terms function with signal sig2 (which is a response function that should not change, only the three-exponential fitting that shpould be optimized so that its convolution with sig2 should match the raw signal "sig1"). data = xlsread('rawdata.xlsx','sheet1','a2:c119000'); time = data(:,1) ; sig1 = data(:,2) ; sig2 = data(:,3) ; % define signal 3 (three exponential terms fitting function) modelfun = @(p,time) - 1.8785e-01*exp(-6e6 *time) - p(2)*exp(-p(3)*time) (1.8785e-01 p(2))*exp(-p(1)*time); now i give very good starting points for the fitting % define initial values for the parameters for the three-exponential terms % fitting to be optimized p0 = [1.4531e 03 3.5868e-01 1.9509e 05]; no i use lsqcurvefit to construct the final target function which should optimize the final fitting so that the convolution of the fitting with sig2 should reproduce well the raw data (sig1). [params,resnorm,residual,exitflag,output,lambda,jacobian] = lsqcurvefit(@(p,time) conv(sig2,modelfun(p,time), 'same'),p0,time,sig1); now if i display the output of this optimization (i display only the three-exponential term function): tesfunc1 = - 1.8785e-01*exp(-6e6 *time) - params(2)*exp(-params(3)*time) (1.8785e-01 params(2))*exp(-params(1)*time); figure plot(time,sig1,'displayname' ,'raw signal' ) hold on plot(time, tesfunc1, 'displayname' ,'optimized fitting') xlabel('time'); ylabel('intensity'); legend it is defenitely a bad optmization, if i do convolution with sig2, it does not reproduce theraw data at all: objective = conv(sig2,tesfunc1); figure plot(time,sig1,'displayname' ,'raw signal' ) hold on plot(time,objective(1:length(time))*(max(sig2)/max(objective)),'displayname' ,'objective function' ) % the max operation is only to scale as the convolution takes the total amplitude to a high level xlabel('time'); ylabel('intensity'); legend however, if i use exactly the initial parameters, it should be a very good fitting (apart fron the convolution changes the overall amplitude that i still do not know how to fix).: tesfunc2 = - 1.8785e-01*exp(-6e6 *time) - p0(2)*exp(-p0(3)*time) (1.8785e-01 p0(2))*exp(-p0(1)*time); % objective function if the optimization found parameters like in p0 % (declared initial points) objective = conv(sig2,tesfunc2); figure plot(time,sig1,'displayname' ,'raw signal' ) hold on plot(time,objective(1:length(time))*(max(sig2)/max(objective))*1.1,'displayname' ,'objective function' ) % again i do the rescaling manually xlabel('time'); ylabel('intensity'); legend of course for this testfunction i knew the parameters, and in reality i would like to find them. for the lsqcurvefit, even if i spoiled it with very good parameters giving the function above, it still missed the fitting completely! i am wondering what can make this optimization better. and i have seen some use "fminunc" with a cost function that would be in my case (costfunction = @(params) mean((rawdata - conv(signal2, fittingfunction(:, params))).^2);)), but i do not really know how to implement it in my case. many thanks in advance.

create a matlab function that averages the input signal with the simulation running in the simulink -- no upload to workspace

2023-06-07t20:58:54z

i need to build a matlab function that is able to average the input signal over a specific time period. in the signal below for example, i need the matlab function to calculate the average of the signal only in the time period from 0.05 to 0.07 s. i cannot use the send to workspace feature (using to file or to workspace), i need to do this operation while the simulink model is running. i cannot use this send-to-workspace feature as it will be implemented physically. i'm a beginner and i don't know how to start

for the control subsystem of the four-switch buck-boost converter, may i know what are the functions of vref, v, ff, and reset?

2023-06-07t16:05:06z

hello, i am a matlab beginner and i want to ask what are vref, v, ff, and reset, and their respective functions as part of the controller of the four-switch buck boost converter. attached is the simulik file of the circuit retrieved from https://www.mathworks.com/help/sps/ug/four-switch-buck-boost-converter-control.html. thank you!

previewing roi's on sequential .mat files (ir video data)

2023-06-07t19:50:55z

goal: display user defined roi's from the first image on subsequent images as a preview to ensure roi does not need to be adjusted before running the script on all images i know there are multiple ways to do this, i thought the easiest would be to create a montage of every 10th or 20th frame and then apply this roi as perhaps a mask. i dont need to do any calculations in this roi, just make sure the object (worm) stays in the roi throughout the frames. i have attached my coding: montage_v1 and v2 are different ways of doing the same thing, livewormroi's is where we set the roi (not my complete script but shows how roi's created and the ones i need to preview). the 12-14.mat file is an example image and the roi_details.png is a screenshot of the 5 roi's i need to preview on the movie/montage before running the script. any help or advice would be greatly appreciated. i saw i can save the roi and apply it to each image but am trying to keep the processing time low and wasnt sure if that was the best way to do it. thank you in advance for any assisstance!

why can not output optimal solution when validate agent?

2023-06-07t19:50:05z

hello everyone, topic: reinforcement learning, dqn agent. i have trained an agent with my dataset (total 28 training data) then validated all these data. problem is i can not get optimal results at validation. some of them were good but not every result was good. env: i custermized an environment. i create critic with this function: critic = rlvectorqvaluefunction(nn,obsinfo,actinfo); with critic create an dqn agent: agent = rldqnagent(critic); i have tried new agent with only 1 data. training could get converged. validation gave also right answer to this data. but i trained an agent with all 28 data using the same hyperparameter. correctness is not garanteed.... i don't know what is reason. because of too small dataset? or i gave wrong hyperparameter? hyperparameter of agent: agent.agentoptions.epsilongreedyexploration.epsilondecay = 0.9; agent.agentoptions.epsilongreedyexploration.epsilon = 0.9; agent.agentoptions.epsilongreedyexploration.epsilonmin = 0.001; agent.agentoptions.discountfactor = 0.99; agent.agentoptions.minibatchsize = 128; agent.agentoptions.criticoptimizeroptions.learnrate = 0.0008; agent.agentoptions.criticoptimizeroptions.gradientthreshold = 1; agent.agentoptions.saveexperiencebufferwithagent=true; thank you kun

can i use academic version for my portfolio on github?

2023-06-07t19:37:12z

i wonder if it is forbidden for publishing my projects on github and my resume or it's ok with company terms.

scattered interpolation: defining my own triangulation?

2020-09-17t14:54:59z

i'm interpolating data the comes from polar coordiate systems or terrain-following coordiante system used in numerical weather models. while that data isn't gridded in the since that it's not grid aligned, it is structured. scattered interpolation is slow. my understanding is that this stems from computing the delaunay triangulation. for my data it would be trivial to provide the triangulation connectivity graph along with the points. is there a way i can provide a pre computed triangulation to scatteredinterpolant or griddata in order to speed up my scattered interpolations? is there some hidden class property i could fill in somewhere?

is it possible to improve the solution process of an milp?

2023-06-07t14:54:27z

hello everybody, i trying to optimize an charging station for evs, which is connected to a pv-modul, to an system storage systeme and to the network grid. i had no issues to simulate a month with time resolution of 15 minutes (pv and load data). however, when i try to simulate for a whole year. i obtain a solution only after 4310 seconds. moreover i am simulating for different battery capacities. so for each battery capacity i get the optimal solution only afeter more than one hour. here is my code and i tried to modify the options. can someone help me? clearallmemoizedcaches; clc; clear; clear vars; load('lithium.mat'); k = input('k ='); if k == 1 a=flywheel; elseif k == 2 a=lead; elseif k == 3 a=lithium; end for i=0:5 %initialization of battery size load('pv_data_year_15.mat'); load('demand_year_15.mat'); %% technical informations: initial_aging_pv = 1; n_station = 12; kwp = 50; % peak power of pv-module p_pv_standard = timetable2table(pv_data_year_15_clean); p_pv_standard = table2array(p_pv_standard(:,4)); p_pv = p_pv_standard/10 * kwp; p_pv = round(p_pv,3); clear p_pv_standard; capacity_batt = 0.5*i*kwp; initial_batt= 0.4*capacity_batt; p_batt_conv = capacity_batt; %max kw of batterie converter p_load_time = timetable2table(demand_year_15_clean); p_load_time = table2array(p_load_time(:,4))*4; p_load = round(p_load_time,3); clear p_load_time; p_grid = max(p_load) 550; capa_batt = zeros(numel(p_pv),1) capacity_batt; usage_time_pv = 20; %year usage_time_charger = 10; %year loss_age = 0.2; %percent loss_age_batt = 0.4; %percent, assumption that eol (80% remaining battery capacity) is after 15 years delta_t = 0.25; % per 15 minutes % costs parameters cost_buy = zeros(numel(p_pv),1) 0.32; %euro/kwh cost_customer = zeros(numel(p_pv),1); %cost_pv = zeros(numel(p_pv),1); cost_sell = zeros(numel(cost_buy),1) 0.078; %euro/kwh cost_grid = 150; %euro/kw cost_peak = 19.83; %euro/kw c_pv = kwp * 1200; %euro c_batt = capacity_batt * a.invest_costs_energy; %euro %c_grid = p_grid * 600; %euro c_station = n_station * 35000; %euro cost_charger = 15000; %euro/kwh %cost_batt_replace = zeros(numel(p_pv),1) 0.6 * c_batt * capacity_batt; r = 0.05; %prozent % efficiency: eff_pv = 0.95; eff_ch = sqrt(a.efficiency); eff_dch = sqrt(a.efficiency); eff_load = 0.9; eff_grid = 0.95; perc_aging_value = loss_age / (usage_time_pv*365*24) * delta_t; ann_pv = ((1 r)^usage_time_pv * r)/((1 r)^usage_time_pv-1); ann_batt = ((1 r)^a.usage_time * r)/((1 r)^a.usage_time-1); ann_charger = ((1 r)^usage_time_charger * r)/((1 r)^usage_time_charger-1); %% variables costs = optimvar('costs',1); %euro r_ch = optimvar('r_ch',1); %euro c_buy = optimvar('c_buy',1); %euro r_sell = optimvar('r_sell',1); %euro c_peak = optimvar('c_peak',1); %euro c_grid = optimvar('c_grid',1); %euro p_buy = optimvar('p_buy', numel(p_pv),'lowerbound',0); %kw p_sell = optimvar('p_sell', numel(p_pv),'lowerbound',0); %kw p_peak = optimvar('p_peak',1,'lowerbound',0); %kw i_buy = optimvar('i_buy',numel(p_pv),'type','integer'); %boolean i_sell = optimvar('i_sell',numel(p_pv),'type','integer'); %boolean %leistung e_batt = optimvar('e_batt',numel(p_pv),'lowerbound',0); %kwh p_ch = optimvar('p_ch',numel(p_pv),'lowerbound',0); %kw p_dch = optimvar('p_dch',numel(p_pv),'lowerbound',0); %kw p_charger = optimvar('p_charger',1,'lowerbound',0); %kw i_ch = optimvar('i_ch',numel(p_pv),'type','integer'); %boolean i_dch = optimvar('i_dch',numel(p_pv),'type','integer'); %boolean %p_pv_var = optimvar('p_pv_var',numel(p_pv)); %kw %% batterie charge/discharge t_help1 = 1:1:numel(p_pv)-1; t_help2 = 2:1:numel(p_pv); e_batt_balance = optimconstr(numel(p_pv),1); e_batt_balance(1) = e_batt(1) == initial_batt; e_batt_balance(t_help2) = e_batt(t_help2) == e_batt(t_help1) p_ch(t_help1)*delta_t - p_dch(t_help1)*delta_t - (a.self_discharge/100) *capacity_batt; %% optimization prob = optimproblem(); prob.objective = costs; %min costs %kostenaufstellung prob.constraints.kosten1 = costs == - r_ch c_buy - r_sell c_bat_var c_grid c_peak; prob.constraints.kosten2 = r_ch == cost_customer' * (p_load * delta_t); prob.constraints.kosten3 = c_buy == cost_buy' * (p_buy * delta_t) ; prob.constraints.kosten4 = r_sell == cost_sell' * (p_sell * delta_t); prob.constraints.kosten5 = c_peak == cost_peak * p_peak; prob.constraints.kosten6 = c_grid == p_peak * cost_grid * ann_charger; prob.constraints.kosten7 = c_bat_var == cost_battery_var' * (p_dch*delta_t); %prob.constraints.kosten8 = c_batt == capacity_batt * a.invest_costs_energy/(a.usage_time*12); %prob.constraints.kosten6 = c_batt == age_batt_var' * cost_batt_replace; %prob.constraints.kosten6 = c_charger == p_peak * cost_charger; %energie balance prob.constraints.leistung1 = p_sell/eff_grid - eff_grid * p_buy == eff_pv * p_pv - p_load / eff_load eff_dch * p_dch - p_ch / eff_ch; %energieerhaltungsgleichung prob.constraints.leistung2 = p_buy >= 0; prob.constraints.leistung3 = p_sell >= 0; prob.constraints.leistung4 = i_buy i_sell <= 1; %buy or sell prob.constraints.leistung5 = p_buy <= p_grid * i_buy ; prob.constraints.leistung6 = p_sell <= p_grid * i_sell ; prob.constraints.leistung7 = p_buy <= p_peak ; prob.constraints.leistung8 = p_peak <= p_grid; %prob.constraints.leistung9 = p_charger <= p_charger; %prob.constraints.leistung9 = p_pv_var <= p_pv; �tterierb prob.constraints.batterie1 = e_batt_balance; prob.constraints.batterie2 = i_ch i_dch <= 1; %charge or discharge prob.constraints.batterie3 = p_ch >= 0; prob.constraints.batterie4 = p_ch <= i_ch * p_batt_conv; prob.constraints.batterie5 = p_dch >= 0; prob.constraints.batterie6 = p_dch <= i_dch * p_batt_conv; prob.constraints.batterie7 = e_batt >= 0.1 * capa_batt; % prob.constraints.batterie8 = e_batt <= 0.9 * capa_batt; % prob.constraints.batterie9 = p_dch <= a.ptoe_ratio*e_batt; %zustaende prob.constraints.zustand1 = i_sell i_dch <= 1; prob.constraints.zustand2 = i_buy i_ch <= 1; %% ausgabe options = optimoptions('intlinprog','cutgeneration','advanced' ,'integerpreprocess','advanced','heuristicsmaxnodes',100,'heuristics','advanced','relativegaptolerance',5e-1); %,'rootlpalgorithm','primal-simplex','heuristicsmaxnodes',100,'heuristics','advanced'); % %'integerpreprocess','advanced'); tic [sol,fval,exitflag] = solve(prob,'options',options); toc % tic and toc used to profile code and identify performace bottlenecks %% batteriestand an neuen tag übergeben rev_sum = - sum(sol.costs) - ann_pv * c_pv - ann_batt * c_batt - ann_charger * c_station; if exitflag == 1 if k == 1 ergebnis_leistung_flywheel = table(sol.p_buy,sol.p_sell,sol.p_ch,sol.p_dch,sol.e_batt,'variablenames',{'p_buy','p_sell','p_ch','p_dch','e_batt'}); save (['ergebnisse_leistung_flywheel',num2str(capacity_batt) 'kwh' '.mat'],'ergebnis_leistung_flywheel'); ergebnis_kosten_flywheel = table(sol.costs,sol.c_buy,sol.r_sell,sol.r_ch,sol.c_peak,sol.p_peak,sol.c_bat_var,'variablenames',{'costs','c_buy','r_sell','r_ch','c_peak','p_peak','c_bat_var'}); save (['ergebnisse_kosten_flywheel', num2str(capacity_batt) 'kwh' '.mat' ],'ergebnis_kosten_flywheel'); %save (['rev_sum_flyhwheel',num2str(capacity_batt) 'kwh' '.mat'],'rev_sum'); elseif k == 2 ergebnis_leistung_lead = table(sol.p_buy,sol.p_sell,sol.p_ch,sol.p_dch,sol.e_batt,'variablenames',{'p_buy','p_sell','p_ch','p_dch','e_batt'}); save (['ergebnisse_leistung_lead', num2str(capacity_batt) 'kwh' '.mat'],'ergebnis_leistung_lead'); ergebnis_kosten_lead = table(sol.costs,sol.c_buy,sol.r_sell,sol.r_ch,sol.c_peak,sol.p_peak,sol.c_bat_var,'variablenames',{'costs','c_buy','r_sell','r_ch','c_peak','p_peak','c_bat_var'}); save (['ergebnisse_kosten_lead', num2str(capacity_batt) 'kwh' '.mat' ],'ergebnis_kosten_lead'); %save (['rev_sum_lead',num2str(capacity_batt) 'kwh' '.mat'],'rev_sum'); elseif k == 3 ergebnis_leistung_lithium = table(sol.p_buy,sol.p_sell,sol.p_ch,sol.p_dch,sol.e_batt,'variablenames',{'p_buy','p_sell','p_ch','p_dch','e_batt'}); %ergebnis_leistung_lithium_month = [ergebnis_leistung_lithium_month;ergebnis_leistung_lithium]; save (['ergebnisse_leistung_lithium_month',num2str(capacity_batt) 'kwh' '.mat'],'ergebnis_leistung_lithium'); ergebnis_kosten_lithium = table(sol.costs,sol.c_buy,sol.r_sell,sol.r_ch,sol.c_bat_var,'variablenames',{'costs','c_buy','r_sell','r_ch','c_bat_var'}); %ergebnis_kosten_lithium_month = [ergebnis_kosten_lithium_month;ergebnis_kosten_lithium]; save (['ergebnisse_kosten_lithium_month',num2str(capacity_batt) 'kwh' '.mat' ],'ergebnis_kosten_lithium'); save (['rev_sum_lithium',num2str(capacity_batt) 'kwh' '.mat'],'rev_sum'); end end %end end

change coordinate system of geotif from wgs 34 to epsg:32628

2023-06-07t17:26:34z

hello i have a geotif with data projected in wgs 84 (standart) and i want to convert it in epsg:32628 since .tif files cannot be uploaded here, i saved it in a .mat (using geotiffread and save). thus the data are in the file test.mat (attached). i want to read this data and export it in a new geotif but with different coordinate system, but i can't : load test.mat coordrefsyscode = 32628 geotiffwrite('test',a,r,'coordrefsyscode',coordrefsyscode) i get this error : error using geotiffwrite function geotiffwrite expected input number 3, r, to be either a 3-by-2 referencing matrix or a scalar map raster reference object. instead its type was: map.rasterref.geographiccellsreference. how can i do it ?

how to us arguments validation functions for multi-frame images

2023-06-07t13:44:30z

hi, i am designing a function to analyse an image sequence frame by frame to return a vector of time according to the cardiac cycle. for the image file argument validation, how do i customise a validation function for these two purposes: 1) ensure each sequence have a reasonable duration (number of frames, minimum 75 frames in total) 2) must be a 3d array thanks in advance! function peaktimes = detectcardiacphase(img, framerate) arguments img (:,:,:) {mustbenumeric} framerate double {mustbepositive} = 15 �fault value of framerate is not specified end

setting path for cad parts in simscape multibody

2023-06-07t16:15:16z

i am creating a simscape project to simulate a 3d model i created with autodesk inventor 2021 (build 250183000, 183). i succesfully exported the .xml and .step files using the simscape multibody link plugin (version 7.4). i am also able to create the simulink model using the command: smimport('filename.xml') to keep my folders more clean i would like to have the model files in a separate folder and have the file solid blocks in the simulink file point to it. after creating a model_data folder in which i put all the .step files and the .xml file, i run: smimport('model_data\filename.xml') the simulink model is created again succesfully. however, this time it does not work as expected. in fact, all the file solid blocks have their geometry\file name field pointing directly to the .step file instead of containing the relative path to it (i.e., the file name field is still 'file.step' instead of 'model_data\file.step'). therefore, the .step files are not found correctly and the simulation cannot start. how can i fix this?

eeglab erp plugin error save permission denied

2023-06-07t16:14:12z

for the eeglab program running on matlab, i have an erplab plugin that will not run. i have tried changing the write permissions through properties (windows) for the plugin folder and for the whole matlab directory. any idea what might be causing this or which groups need permissions for which directories / files?

for the control subsystem of the four-switch buck-boost converter, may i know what are the functions of vref, v, ff, and reset?

2023-06-07t15:43:24z

logic statements in function handle

2023-06-07t13:50:13z

i am trying to perform a logic statement in a function handle, so that i can evaluate a function at a series of coordinates, then make decisions. i have the following: p --> an n x 2 double array. contains pairs of coordinates [x,y] fi --> a griddedinterpolant function. the coordinates in p fall within range and domain of the grid that was interpolated to obtain this (so they are compatible). fi2 --> a second griddedinterpolant function, derived from a second set of data more or less the same as in fi. important point: the values that can be evaluated in fi and fi2 are partially mutually exclusive. if fi is negative, the fi2 must be positive, and the other way around. however, it is possible for both to be positive (there is a gap between them). i've used this to make a function handles as follow: fd=@(p) fi(p); fd2=@(p) fi2(p); these work just fine for calling later on and give nice sensible values when evaluated at p or sub-arrays of p. here's the tricky bit. i want to make a new function handle ("fh") that takes the evaluations of these functions at p, and then makes a step-change based on certain results for each individial p entry. essentially, i want a function handle that does the work of an if statement. so, i tried to accomplish this by making 2 function handles for evaluating, and then treating them as logic statements, so i am multiplying by 1 or 0. what i have tried (simplified), is this: fha=@(p) (feval(fd,p)); fhb=@(p) (feval(fd2,p)); fh=@(p) max((fha<(0))*a, (fhb)<(0)*b, ((fha)>(0)*(fhb)>(0))*((a b)/2)); this should be the equivalent of: if fha < 0, then a; elseif fhb < 0, then b; else average of a and b in other words, if a point within p has coordinates in a region where fd is negative, that point will have an associate value a. if it is in a position where fd2 is negative, it will be b. but if it falls in the regions where both evaluate to positive, its assigned value is the average of a and b. i've also tried this nesting the feval statements into the fh call, and doing it as a single handle. neither has worked. is there a smart way to approach this, keeping in mind that i need to pass this handle to another function and then do lots of array manipulation stuff with it?

how to wait for another gui button press in appdesigner?

2023-06-07t15:18:39z

so, i have webapp with the following loose structure. user clicks start in the gui a sound is played user clicks one of several buttons to rate the sound the app waits for response plays another sound shortly after recieving repsonse etc. i'm stuck with trying to make the app wait for user response. i tried setting a while loop that would wait for a check variable to become true, and assigning that change in each button, but this didn't work, the buttons are not executable when it is in the while loop. documentations suggests "use uiwait" but the ui wait documentation doesn't give any further clue how this would be done when relying on callbacks etc, only when closing like dialogue boxes etc. if i use uiwait()&uiresume, then it creates a figure external to the app which cannot be disabled as far as i can tell. thank you!

how to read data from keithley voltmeter and hp signal analyzer using visa interface

2023-06-07t15:13:37z

i established the objects through the visa innterface, but after trying to write the data from it i am recieving the error "read(hpfreqanalyzer, 6) adaptor command 'setresourceattribute' failed with status code: -480." i checked the connection by trying to re establish the object and am now recieving the error >> currentmeter = visadev("gpib0::3::instr") resource string is invalid or resource was not found. see related documentation for troubleshooting steps. even though the object is in my window on the right hand side.

adjustment of the pin-to-pin distance to create the maximum reach posture of the front of a hydraulic excavator. (adjustment of cylindrical joint and revolute joint)

2023-06-07t15:08:23z

i would like to reproduce the movement of the front part of a hydraulic excavator in simscape multibody. i would like to fix the distance between the pins (cylinder length) in order to create the maximum reach posture of the front part, but i do not know how to do this. currently, we are trying to adjust the limits of the cylindrical joint and the revolute joint to get the behavior closer to that of a real excavator, but we are not fully aware of the effect of the limits. how can we fix the distance between the pins and create the maximum reach posture? i would appreciate it if you could help me. thank you in advance.

issues using simulink coder to generate veristand-compatible c code

2023-05-03t01:58:09z

i have installed the three required support packages to generate veristand compatible models: veristand model generation support, matlab support for mingw-w64 c/c compiler, and c/c development tools for ni linux real-time 2017. when i use simulink coder in r2020b or r2021a, the ports, parameters and signals readme files are missing in the rtw folder. i installed 2019b since my colleague is able to generate a full set of files using that version, installed all the support packages but i cannot even complete the build. it terminates with this error: the call to veristand_make_rtw_hook, during the before_make hook generated the following error: 'modelparameters' is not a valid datainterface type. the valid datainterface types are described by 'getalldatainterfacetypes' method on the codedescriptor object the build process will terminate as a result. caused by: 'modelparameters' is not a valid datainterface type. the valid datainterface types are described by 'getalldatainterfacetypes' method on the codedescriptor object oddly enough, the coder in 2019b is able to succesfully the complete the build for a generic target. i'm not sure where the issue is coming from. i would appreciate a solution for either of these issues but i would prefer to be able to generate the necessary ports and parameters text files using r2020b.

i have an image and want to perform edge detection and highlight them

2023-06-07t14:47:59z

i have an edge detected image and would like to highlight the edges of triangle as as the edges are not straight and it has jugged lines (uneven line). after detecting those edges and displaying them, i also have to calculate the length of the edges of each triangle in the given image and display those triangles along with the length of each edges. i have attached the image for reference and also the image on how the highlighted image (output) should look like. i tried the code but all the sides are not getting highlighted. clc; close all; clear all; % perform edge detection edgedimage = imread('smooth_imgprocessed_in_matlabcode.jpg'); % convert the image to grayscale if necessary if size(edgedimage, 3) == 3 edgedimage = rgb2gray(edgedimage); end % detect edges using canny edge detection edges = edge(edgedimage, 'canny'); % perform hough transform to detect straight lines [h,theta,rho] = hough(edges); peaks = houghpeaks(h, 10); % adjust the number of peaks to detect more or fewer lines % find lines using hough transform peaks lines = houghlines(edges,theta,rho,peaks); % initialize cell array to store triangular edges triangularedges = cell(0); % iterate through the detected lines and find triangular edges for i = 1:length(lines) for j = i 1:length(lines) anglediff = abs(lines(i).theta - lines(j).theta); if anglediff > 80 && anglediff < 100 % adjust the angle difference threshold as needed % store the triangular edges in the cell array triangularedges{end 1} = [lines(i) lines(j)]; end end end % display the original edged image figure; imshow(edgedimage); hold on; % highlight triangular edges in red color for k = 1:length(triangularedges) edges = triangularedges{k}; for m = 1:size(edges, 2) x = [edges(m).point1(1), edges(m).point2(1)]; y = [edges(m).point1(2), edges(m).point2(2)]; plot(x, y, 'linewidth', 2, 'color', 'r'); end end hold off;

changing initial conditions of a simulink model when simulating using a for loop

2023-05-29t21:00:40z

i am trying to run a vehicle simulink model (taken from here) for 5 seconds. when i try running it directly, the response seems to make sense. however, when i use a for loop to do the same using a for loop (see attached runexample.m), the response is quite different. my assumption is i am not changing the initial conditions after each loop properly. is there a way to update the initial conditions automatically instead of the way i am doing it, i.e., manually? what other ways could i trye to have the same responses with and without the for loop? all the relevant files are uploaded. simply set rundirect in the runexample.m file to true to run without the for loop, otherwise, set it to false. thanks in advance for your time. looking forward to get some solution.

cycle basis for large graph

2023-06-05t09:02:34z

i have a graph of around 3 million nodes and 10 million edges. i want to get the cycle basis of the graph but it runs out of memory when using the command cyclebasis(g). is there a way to solve it?

how can i fix these er index exceeds array bounds. error in ext2int (line 163) bs(n2i(mpc.branch(:, t_bus))) ); error in power_flow_case (line 44) mpc = ext2int(mpc, mpopt);

2023-06-07t14:09:18z

function mpc = power_flow_case() % bus data mpc.bus = [ 1 3 0 0 0 0 1.060 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 2 2 0 0 0 0 1.045 0 0 230 13.2 300 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 3 2 0 0 0 0 1.010 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 4 1 0 0 0 0 1.070 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 5 1 0 0 0 0 1.090 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 6 1 0 0 0 0 1.090 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 7 1 0 0 0 0 1.060 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 8 2 0 0 0 0 1.035 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; ]; % generator data mpc.gen = [ 1 0 0 100 -100 1.05 300 1 300 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 % add more generator data if needed ]; % transformer data mpc.branch = [ 1 2 0 0.15 0.1 0 0 0 0 0 1 -360 360 0 1; 2 3 0 0.2 0.15 0 0 0 0 0 1 -360 360 0 1; ]; % line data mpc.branch = [ mpc.branch; 2 4 0 0.00032*30 0.0024*30 0 0 0 0 0 1 -360 360 0 1; 5 6 0 0.00032*40 0.0024*40 0 0 0 0 0 1 -360 360 0 1; 6 7 0 0.00032*40 0.0024*40 0 0 0 0 0 1 -360 360 0 1; 7 8 0 0.00032*35 0.0024*35 0 0 0 0 0 1 -360 360 0 1; 2 9 0 0.00032*60 0.0024*60 0 0 0 0 0 1 -360 360 0 1; ]; % base quantities mpc.basemva = 300; mpc.bus(:,3) = mpc.bus(:,3) / mpc.basemva; mpc.branch(:,4:6) = mpc.branch(:,4:6) * mpc.basemva; mpc.gen(:,2:3) = mpc.gen(:,2:3) / mpc.basemva; % run the power flow mpopt = mpoption('pf.nr.max_it', 20); mpc = ext2int(mpc, mpopt); results = runpf(mpc, mpopt); end

windows server 2022 matlab compiled app crashes every hour

2023-06-07t14:04:49z

i have a matlab app compiled in r2020b and executed on windows server 2022 where i have the runtime 9.9. every hour, seems randomically, my app crashes and from the windows event viewer i get the following: faulting application name: matlabwindow.exe, version: 9.9.0.0, time stamp: 0x4b3d3b00 faulting module name: ntdll.dll, version: 10.0.20348.681, time stamp: 0x69d3cd31 exception code: 0xc0000005 fault offset: 0x000000000001c99f faulting process id: 0x1a80 faulting application start time: 0x01d996a021ecc232 faulting application path: c:\program files\matlab\matlab runtime\v99\bin\win64\matlabwindow.exe faulting module path: c:\windows\system32\ntdll.dll report id: d0bf55a1-54e6-4d42-a1fa-26eecf8f25e8 faulting package full name: faulting package-relative application id: how can i fix this issue?

数据采集频次（frequency of data collection）

2023-06-07t13:48:52z

在开始数据采集时，请问数据采集频次是几秒一次呢？（when starting data collection, how often is the data collection frequency in seconds?）

what does the following error mean "internal error while creating code interface description file: codeinfo.mat. aborting code generation."

2023-06-07t13:46:39z

codegen is throwing the following error when doing code generation "internal error while creating code interface description file: codeinfo.mat. aborting code generation. caused by: index exceeds the number of array elements. index must not exceed 0. " the error doesn't give any more information and hence cannot figure out what is the problem. using ert based target file.

error when running simulink

2023-06-07t13:10:52z

i am having trouble running my system i am using the simscape battery package to design the system. when i run the code i am getting this error error due to multiple causes. caused by: error evaluating parameter 'soc_veccell' in 'battery_system/pack1/moduleassembly1/module1' unable to resolve the name 'moduletype1.soc_veccell'. please leave suggestions. i have also attacthed the file below.

how are the inductor and capacitor values of the boost converter calculated?

2023-06-07t12:50:20z

i have a grid connected photovoltaic system including pv panel, boost converter, single phase inverter and lc filter. how can i calculate the inductor and capacitor values of the boost converter?

how to plot this circulair domaine ?

2023-06-07t12:19:12z

simulink function block output not resolving to signal

2023-06-07t12:46:37z

i am trying to generate a signal driving a current source using a function block in simulink. but i am getting errors about the output ”iharm”. the function works fine in matlab workspace but not working in simulink environment. error: output 'iharm' has variable size but the upper bound is not specified; explicit upper bound must be provided. or “iharm” can not resolve to signal object. i have tried specifying the bounds using assert and coder.varsize, but still error is there. also specifying “data must resolve to signal object” in model workspace does not seem to work. simulink model is attached if anyone can help me to resolve this issue.

并行计算使用parsim，每个循环中参数可以更改，工况怎么改（通过from workspace加载工况，时间和速度二维向量）

2023-06-07t12:44:34z

for i=1:100 in(i) = simulink.simulationinput(model); end out = parsim(in, 'showprogress', 'on','transferbaseworkspacevariables','on','usefastrestart','on'); 先用for建立并行计算对象in; 在parsim并行计算过程中，每个循环的计算中，v_ms_front{i}加载的都是第100组数据。这问题怎么解决？

caluclating an integral over a rectangle, with a singularity point.

2023-06-07t09:31:01z

hi! i am trying to evaluate the following integral: where bx,by are some set values. so i wrote the following code: funcl_nn = @(x,z) (1/(4*pi*epsilon_zero))*(1./sqrt(x.^2 z.^2)); nn = quad2d(funcl_nn,-dist/2,dist/2,-bz/2,bz/2,'abstol',1e-8,'singular',true,maxfunevals=100000); and also tried to use integral2 and tiled method, but it always returns: warning: reached the maximum number of function evaluations (100000). the result fails the global error test. what's weird is that if i change the values of by,bx to be larger, then the error does not occur. i assume it is caused by the point (0,0). i would try to switch to polar coordinates if the domain wasn't rectangular... can anyone tell me what can i do such a situation? thanks in advance!

error in trapz in matlab

2023-06-07t12:15:35z

i get an error "error in trapz (line 42) perm = [dim:max(ndims(y),dim) 1:dim-1];" for the code j = trapz(t, y(:, 2) y(:, 3) y(:, 4) y(:, 5) k/2*u.^2);

input live data (continuously generated data) from app designer to simulink

2023-06-07t12:04:20z

hello, i am trying to calculate state of charge using simulink block diagrams. my current and voltage adc values are gotten from a serial port and sent to app designer to get the actual current and voltage. i am trying to get this values to simulink. i have tried using "assignin" to send the variables to the work space and then read them from there, but the variables are not updateing. the simulink model reads the first values and stops. after i stop the app, the work space then updates to the lates value. i wish to ask how i can get this running with variables flowing from app designer to simulink and updating as required? thanks

matlab answers -凯发k8网页登录

how to regulate variable dc voltage by chopper circuit or other ways?

wlanhdlreceiver use only 64 sample to do fine symbol timming. is it enough for 40m, 80m and 16mhz wlan signal?

how to read data type conversion block name using mscript

how in simulink send one signal from an input to one of several outputs according to a given output number?

how do i turn the rankine cycle simscape model example provided by mathlab into organic rankine cycle to use different fluid properties other than water

use of fminimax function to solve minimax game

old simulink models wont run in 2023a, requires aerospace toolbox, did not before

sysgen license checkout failed.

error during gan training : render process terminated: null java.lang.nosuchfielderror: ts_process_oom

eigen value of stochastic matrix

how can i interface my texas instrument dsp with available can communication through simulink

java.lang.illegalargumentexception: ntfs ads separator (':') in file name is forbidden

visadev autoly continously send '*idn?'. get thousands of lines of the return of '*idn?'

is it possible to make windows desktop pc to a master host for ethercat network?

matlab coder returning non specific issue description during check for runtime issues step

how do i add a unique id to the the graph in can explorer in the vehicle network toolbox?

setting up graphic user interface

bad optimization of an objective nonlinear fitting

create a matlab function that averages the input signal with the simulation running in the simulink -- no upload to workspace

for the control subsystem of the four-switch buck-boost converter, may i know what are the functions of vref, v, ff, and reset?

previewing roi's on sequential .mat files (ir video data)

why can not output optimal solution when validate agent?

can i use academic version for my portfolio on github?

scattered interpolation: defining my own triangulation?

is it possible to improve the solution process of an milp?

change coordinate system of geotif from wgs 34 to epsg:32628

how to us arguments validation functions for multi-frame images

setting path for cad parts in simscape multibody

eeglab erp plugin error save permission denied

for the control subsystem of the four-switch buck-boost converter, may i know what are the functions of vref, v, ff, and reset?

logic statements in function handle

how to wait for another gui button press in appdesigner?

how to read data from keithley voltmeter and hp signal analyzer using visa interface

adjustment of the pin-to-pin distance to create the maximum reach posture of the front of a hydraulic excavator. (adjustment of cylindrical joint and revolute joint)

issues using simulink coder to generate veristand-compatible c code

i have an image and want to perform edge detection and highlight them

changing initial conditions of a simulink model when simulating using a for loop

cycle basis for large graph

how can i fix these er index exceeds array bounds. error in ext2int (line 163) bs(n2i(mpc.branch(:, t_bus))) ); error in power_flow_case (line 44) mpc = ext2int(mpc, mpopt);

windows server 2022 matlab compiled app crashes every hour

数据采集频次（frequency of data collection）

what does the following error mean "internal error while creating code interface description file: codeinfo.mat. aborting code generation."

error when running simulink

how are the inductor and capacitor values of the boost converter calculated?

how to plot this circulair domaine ?

simulink function block output not resolving to signal

并行计算使用parsim，每个循环中参数可以更改，工况怎么改（通过from workspace加载工况，时间和速度二维向量）

caluclating an integral over a rectangle, with a singularity point.

error in trapz in matlab

input live data (continuously generated data) from app designer to simulink

visadev autoly continously send 'idn?'. get thousands of lines of the return of 'idn?'