Does anybody know a way to calculate J-integral in ANSYS APDL code or MATLAB code?

Hi, How to calculate j integral using the domain integral method in ANSYS code or MATLAB code?

04 February 2021 7,330 3 View

What is the chemical mechanism that allows the solvent N, N Dimethylformamide to dissolve the epoxy resin?

24 September 2020 8,588 3 View

How to choose from which layer to start unfreezing pretrained model?

I'm wondering how you decide on the part of the model to unfreeze. Do you do multiple experiments? Since the use of GPU is expensive, you must have some guidelines. Note: I know the relationship...

09 January 2020 8,069 4 View

DNA extraxtion with SDS/PK/CTAB?

Iwill be so grateful if any researecher can share me protocol of DNA extraxtion using SDS/PK/CTAB method . thanks

29 August 2019 2,025 3 View

How to predict the velocity distribution of a sprayed powder from a nozzle?

Hello everyone, I am searching if it exists any formula used for predicting a velocity distribution of injected solid particles in my case I used flour and the type of injection is through a...

12 June 2019 6,147 3 View

Which flow should I choose in the case of two parallel plates ?

Hello everyone, I am a little confused into choosing the right flow's nature wether it is Laminar or Turbulent and in my case I have the Fluid flow and particles are moving through two parallel...

03 February 2018 5,865 7 View

Does the term of Dynamic Viscosity exist for solid materials?

Hi there everyone ^^, I need some help for my study in the field of Fluid flow, I use COMSOL Multiphysics for this and When I add some solid materials like copper or aluminium for the geometries...

15 December 2016 3,259 15 View

Kindly tell me please what kind of plastic that resists in acetonitrile solvent?

01 December 2016 1,226 6 View

How to simulate Laminar Flow 2D between two horizontal infinite parallel plates ?

19 August 2016 5,872 12 View

Can anyone tell me what is this insect?

I had found on the hare in humid region.

19 March 2015 7,201 21 View

Can I use a time series dependent variable in a panel regression?

Hi all Can I run a Gmm model with a time series dependent variable? I have a sample of 12 countries and years from 2000 to 2018

03 February 2021 6,491 6 View

SEM for panel data ?

I'm trying to find the effect of smart cities on sustainable development. I collected data for several indicators of smartness of a city for 15 cities over 12 years. seems like panel data (GMM...

12 January 2021 9,914 5 View

Macrostudies using sysGMM?

Dear all, Could you recommend macroeconomic studies (hopefully published in good journals) that use system GMM or Arellano-Bond estimators? Thanks a lot!

10 December 2020 5,130 4 View

GMM with very short time, is three enough?

I first conducted a fixed effect model using xtreg y x, fe and I found that all the variables are significant and R-squared is .51. So I thought that maybe I should use two step system GMM to...

07 October 2020 5,386 3 View

Exactly same results of OLS ,2SLS and GMM model?

I run OLS regression on panel data in Eviews and then 2SLS and GMM regression. I introduced all the independent variables of OLS as instrumental variables. I am getting exacty same results under...

05 April 2020 4,683 1 View

Why do researchers use GMM-UBM instead of SVM as a classifier?

The Gaussian Mixture Model with Universal Background Model (GMM-UBM) takes individual class training data to train the GMM and uses all training data or different dataset to build the UBM. In this...

03 March 2020 260 3 View

Should we collapse instruments in large samples?

Collapsing instruments in a system GMM model is useful in treating the problem of instrument proliferation. However, the instructions given to xtabond2 of Stata suggest that "In large samples,...

11 January 2020 4,738 3 View

Should insignificant IVs be reported in GMM?

While analyzing a linear relation, GMM produces insignificant results for the main IV in a quadratic regression model. Though the signs of the coefficients' are valid, the results are...

10 November 2019 399 5 View

What are the relevant data and model diagnoatic tests fof System GMM?

The conventional test for the system GMM is 1) testing for instrument validity and 2) test for second order serial autocorrelation. Are there pre-estimation tests that may be relevant i.e...

09 October 2019 9,938 6 View

Does Gaussian Mixture model assume data to follow multivariate normal distribution ?

I have a dataset and trying to apply soft clustering, preferably Multivariate Gaussian Mixture model, but I have following doubts : 1. Does Multivariate GMM assume the underlying data to follow...

30 July 2019 6,266 4 View