Results for

Jiro Doke
Jiro Doke
Last activity on 24 Aug 2023

Do you use MATLAB Online for teaching?

MATLAB Online lets students run MATLAB without having to install the software on the computer. All you need is a web browser and an internet connection.

I would love to hear comments and experiences of using MATLAB Online.

Hi, all friends

If I define a parameter, like solubility with dimension of milligram/milliliter and I want to refer it in an reaction equation in dimension of millimole/liter, suppose I have define its molecularweight, could I input this parameter directly in equation with specified dimension?

Question: How to load a host of variants created through scripts to a sbproj file so that we can simulate and visualize them through the simbiology GUI.

Description : In a typical QSP workflow, we generate virtual patients by perturbing a set of parameters. These virtual patients are generated as variants by using "addvariant".

We end up with an array of variants saved as "variants.mat". This mat contains the list of ~3000 variants.

These variants are now to be simulated with different dose objects. This could be done with scripts but it would be ideal if we import these variants into the sbproj file and simulate via simbiology GUI for both purpose of troubleshooting and dosing.

Is there a way to do this?

The Webinar has ended, but you can view the recording here on YouTube.

MathWorks has developed several cloud-based tools to enable instructors and students to have access for teaching and learning anytime, anywhere. Join us for a free webinar with Dr. Elvira Osuna-Highley where we’ll discuss these tools, how they fit together to support your course development and delivery workflow, and how to use them immediately in your online course.

We will discuss several resources including:

• Accessing MATLAB Online and MATLAB Drive Anytime, Anywhere

• Leveraging interactive content with self-paced courses, MATLAB Apps, and Live Scripts

• Mentoring students at scale with automated assessment and feedback in MATLAB Grader

• Connecting students with the community by participating in the MATLAB user community

Thank you to IFEES, GEDC and IUCEE for sponsoring this series to help support educators across the world in moving their courses online.

Chad Allie
Chad Allie
Last activity on 30 Mar 2020

Tell us your story

Hello Distance Learning Community!

I am hoping to hear from any academics in how MATLAB's online resources have helped you during this difficult time of transition to online courses:

- Have you had any issues or difficulties with getting started with our online tools?

- Do you see any areas of improvement that could better serve your course in an online environment?

- Do you have any stories to share of how these online tools have helped you to run your class and improve it for the future?

Thank you and stay well!

Chad Allie

Education Customer Success (USA Southwest)

Hello everyone,

I’m Jiro, and I’m part of the Education Customer Success group at MathWorks. We help academics, students, and institutions achieve success through the use of our tools. I will be the moderator for this new community of distance learning.

As many academic institutions are moving their classes online, we hope that this community will help instructors connect with others who are in the same situation. This community site gathers various resources and information that will be useful for teaching with MATLAB and Simulink in a distance learning setting. We have a number of MathWorks employees monitoring this community, but we want this to be a place for the community to come together. The hope is that the community will grow and the resources gathered here will grow with it.

I encourage you to share best practices ( Discussions ), ask questions ( MATLAB Answers ), and share examples ( File Exchange ).

As a first question, what course are you teaching (or planning to teach) online?

Hi, all friends

I am working on building a oral model with "Generic SimBiology PBPK model" and meet some problems about intestinal transit rate. Take duodenum as example, the transit rate is defined as " (kTransportSmallIntestine*organismLengthDuodenum/organismLengthSmallInstestine)*Duodenum.DrugDissolved". I think assuming duodenum transit time is equal to SmallIntestineTransittime*organismLengthDuodenum/organismLengthSmallInstestine, the transit rate constant is the inverse of that,which result in kTransportSmallIntestine*organismLengthSmallInstestine/organismLengthDuodenum, contradicting with the equation in model. Am I wrong?

Besides that, the kTransportSmallIntestine_is defined as _0.693/organismMeanResidenceSmallIntestine in model. Isn't the mean residence time determining the time at which about 63.2% of initial amount having passed through the compartment and inverse of mean residence time determining the transit rate? Why does organismMeanResidenceSmallIntestine correlate with 0.693 which is often seen in half-life associated expression?

Thanks for any comment.

praveen kumar
praveen kumar
Last activity on 26 Mar 2020

Thermal unit commitment problem

Hello friends i have strugled to develope codes in matlab and spent ample time in converting the available codes to my area . If any of the researcher are interested to share their codes with me are welcomed and collabarations are welcomed ...currenty i need a basic code in unit commitment using real coded and binary coded for Security contrained and integrating Reneweable energy .. I too will share my codes because world is going to vanish soon so my knowledge should spread across the globe

with rds s.praveen kumar email:praveenaups777@gmail.com

Tony Lennon
Tony Lennon
Last activity on 25 Mar 2020

New Feature in Simulink R2020a

Check out this short video on the new features in Simulink R2020a . What's your favorite new feature?

Just wanted to post a link to this video we recently published on YouTube:

PID Controller tuning for a buck converter

Let me know what you think. Arkadiy

Hi, fellows,

I am a new user of MATLAB and SimBiology. When I open the "Generic SimBiology Physiologically-based Pharmacokinetic (PBPK) model" downloaded from "https://ww2.mathworks.cn/matlabcentral/fileexchange/37752-generic-simbiology-physiologically-based-pharmacokinetic-pbpk-model", I get a note of "Copyright 2012-2018 The MathWorks, Inc. ...". Does that mean I can not access to the model built-in or make any modification?

Thanks for any comment!

Hi everyone,

I am trying to control an actuator with brushless DC Motor in Simulink. At one point, I am in need of the motor rotation and the only parameter available to me is the duty cycle and the direction of rotor. I knew that it is not possible to calculate rotation from duty cycle. In case if some one have idea about this or some suggestions, could you please share with me

Thanks in advance

Hello,

I am trying to simulate a PMSM, which has a Quasi sinusoidal back-emf waveform. Is there any way I can define the back emf to be anything other than Sinusoidal/Trapezoidal?

Thanks in advance. Saurabh Kumar

Recently, I have been learning the mathematical modeling of switching converters. Looking for a lot of data, I know that the current loop control mainly includes peak current, valley current and average current control methods. The detailed process of peak current modeling is found in the book "modeling, control and digital realization of switch converter". However, my brother has not found the detailed introduction of average current modeling. I would like to ask you brother and sister have any good information recommendation, the best is books (the most detailed explanation). Thank you very much!

I have issue with the design that i have downloaded from mathwork community. how to solve regarding this matter

Failed to load library 'powerlib_models' referenced by 'mcupqc/Subsystem/Voltage Measurement/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement1/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement2/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement3/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement4/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement5/model' Component:Simulink | Category:Model error Failed to load library 'powerlib_models' referenced by 'mcupqc/Three-Phase V-I Measurement6/model' Component:Simulink | Category:Model error

Hello everyone, I am trying to implement 3 level space vector modulation for a multilevel inverter. Without mapping vector for region selection of three level space vector, I am getting reference angle started from sector-1 to sector-6 as shown in ''theta_ref'' file. But when I am implementing mapping references for region selection (please see in the attached file ''mapping_reference''), the reference angle is shifting 180 degree that means it is starting from sector-6 to sector-1 as in attached file ''theta_ref_with_region_identification''. Could anyone please let me know why this is happening and how to solve this problem?

Thanks in advance.

hi MPPT on the designed bosst circuit does not work correctly. Can i get any help?

New Features

R2019b introduces the new SimBiology Model Analyzer which replaces Task Editor enabling you to do a lot more within the app.

For a detailed look into enhancements with Model Analyzer, we created a few short videos. Below is a list of the new features together with videos describing each feature.

Compatibility considerations with earlier versions of SimBiology

There are a few things that one needs to be aware of if planning to use R2019b with a SimBiology project created in older versions. If you load a project created pre-R2019b, the existing tasks are converted to equivalent programs. However, keep in mind the following for the current version of SimBiology Model Analyzer:

  • Live Plots functionality of the Task Editor is not supported. If Live Plots in the Task Editor is turned on and shows a time plot of simulation results, then an equivalent time plot is added on import to the SimBiology Model Analyzer app with the main difference being that the time plot is updated and displayed after the program finishes (not while it is running).
  • Previously available Calculate Conserved Cycles, Search Model(s), and Generate Report tasks are not supported.
  • Any Group Simulation task is converted to a Scan program.
  • Fit Data program does not support nlinfit as the estimation method. However, the command-line function sbiofit still supports nlinfit.
  • To help with the transition to R2019b, when you open an existing project created in R2019a or earlier, the app creates a backup of the original file. The backup file has the release information suffixed to its name, filename_release.sbproj. For example, if you open an R2019a project named foo.sbproj in the app, the app creates a backup file called foo_R2019a.sbproj.
  • Also, when you open and save a project, the app creates a backup file of the version prior to the saved version of the project. The backup file has the .bak extension (for example, foo.sbproj.bak).

See the complete list of general behavior change, compatibility considerations, and new features in the release notes.

I have 1942x1 cell msgs. Single msg format is 1x1 Float64MultiArray. Inside that there is Data 16x1 double. I need to extract data and store them as vector [1942x16]. I was able to read every data and transpose them into 1x16. Now I need to store that 1x16 by row and build final 1942x16 vector. Does anyone have an idea for that?