¿ Algún experto en simulación de inversores ?

Victor Antonio Ramirez @Victor-Ramirez-65

21 June 2024 0 2K Report

Simular una topología de inversor para aplicaciones de vehículos eléctricos en el software PSIM

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How to find a correlation between coordinates in a curvilinear coordinate system?

Hello. I have a skewed elliptical coordinate system (I use alternative elliptical coordinates). And I need to determine connections between coordinates in order to fetch a covariance matrix of...

28 February 2021 364 3 View

Failed Chromatograms on HPLC-ESI Orbitrap?

Hello fellow researchers, I recently have a problem with an HPLC coupled to an Orbitrap mass analyzer. I usually use some protein mix to make sure the equipment is ready to separate and read...

09 February 2021 3,595 8 View

How to convert all .csv file to grayscale image and then save them?

I have a database of experiment .csv files. how to extract the feature from this .CSV file with max-min normalization? I need a matrix(with values between 0 to 255) to be converted to a grayscale...

04 February 2021 7,773 3 View

Which air pollution/air quality books do you recommend for working with environmental engineering students?

I am exploring up-to-date books on air pollution and air quality, and I would like to know which books do you recommend for environmental engineering students.

25 January 2021 3,972 7 View

Why my ladder bands are not properly stained?

Hi. I am doing an agarose gel electrophoresis. After running PCR samples in a 2% agarose gel at 90V x 45' I obtained the results in the image. The ladder bands are not properly stained. For...

14 January 2021 2,316 4 View

Do you know any available open-source data on animal behavior for model validation?

In my research related to monitoring the cow behavior with help of sensors I have a permanent and principal problem with the data for model validation. I tried to find some available open-source...

26 December 2020 8,197 2 View

Do I need to run a factor analysis on all the items used in the SEM to solve the multicollinearity issues?

Respected researchers, I conducted a SEM including 5 variables (two independent variables , two mediators, and a dependent variables), the correlations between these variables range vary from...

01 December 2020 1,338 5 View

Is there a technique to implant a cannula for repeated CSF sampling?

We need to collect CSF samples repeatedly from the 4th or lateral ventricle of rats. Does anyone know of a protocol for implanting a cannula to be able to do this? Or even a protocol for this...

26 October 2020 5,804 3 View

What was the reason to not analyze fresh soil sample as compared to dry soil sample for NO3 and NH4 ?

This is wondering me as how the process of soil sampling for both NH4 and NO3 ? what was the reason to not analyze fresh soil samples for both parameters ? the dry soil sample change the state of...

25 October 2020 8,765 2 View

Do you know of research in communication/media studies using "Activity theory" ?

Hello, For a project which studies how teens deal with social media and their interfaces, I'm interested in so-called "activity theory" (also know as cultural-historical activity theory). I know...

21 October 2020 2,364 4 View

How do you write a simplified C block code of this average-current control on PSIM?

This is a Buck (step-down) Converter and I am new to this program. I need to program with simplified C block and I actually don't know what to do. Can anyone show me how to do this? Or at least...

02 March 2021 8,233 1 View

How to model the battery pack in PSIM or PSCAD?

Hello, I have simulated a single battery cell using Thevenin equivalent circuit. For a battery pack, I have a large number of cells connected in series and parallel connections. Is there any way...

28 February 2021 2,116 1 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

Can I consider the OOB score of RF model as the same as R^2 score?

In a topology optimization machine learning prediction algorithm, can I consider the OOB score of RF as the same as R^2 score. Could that be a more unbiased way of validating the model

14 February 2021 3,540 1 View

Charmm/GROMACS Residue 'ZN' not found in residue topology database?

I am trying to do some MD simulations of a protein with zinc ions. I am trying to use a charmm forcefield (I have tried 2017 and 2021) and Gromacs. I get an error when doing pdb2gmx Residue 'ZN'...

12 February 2021 9,367 2 View

Do anyone have a full MATLAB code for structural topology optimization using Genetic Algorithm? Such as a cantilever beam?

Do anyone have a full MATLAB code for structural topology optimization using Genetic Algorithm? Such as a cantilever beam? Could you provide some MATLAB code to me , a beginner for GA. Thank...

03 February 2021 3,789 5 View

Matrix based scientific data analysis: extrapolating to matrices of sets?

Data sets, when structured, can be put in vector form (v(1)...v(n)), adding time dependency it's v(i, t) for i=1...n and t=1...T. Then we have a matrix of terms v(i, j)... Matrices are important,...

30 January 2021 9,295 6 View

Can't generate a mash for topology in ANSYS. how to do it?

Created model of steel caisson in space claim. Used a static structure for topology. But there's an error "one or more surfaces cannot be mashed with acceptable quality", " One or more entities...

25 January 2021 893 1 View

How to find Kp,Ki of PI Controller from Gain and Time constant ?

Hello ! I have a PSIM circuit model where for the PI Controller Gain and Time constant values are mentioned. I would like to use the same values with Matlab PI controller where input is...

13 January 2021 6,066 7 View

Lipid Force Field with gromacs command pdb2gmx?

I have a pdb file that contains DPPC molecules and other molecules. I want to generate .gro and .top files from this pdb file using the Gromacs command pdb2gmx. I am trying to use the Charmm36...

08 January 2021 3,751 6 View