What is the mathematical definition of degenerate multivariate random variables?

what is a clear definition of degenerate multivariate random variable from measure theoretic aspect? and how can we describe them with probability density function by introducing delta function ?

03 April 2018 1,639 0 View

What are theoretical topics in differenqial equation?

i look for a list of theoretical topics in differential equation not necessarily active research topics. the topics that is the in field of a concret math and is not differential equation...

02 March 2018 3,913 7 View

What is the best abstract definition for matrix determinant?

i look for a axiomatic or abstract definition for matrix determinant . there are a lot of formulas and properties for matrix determinant but none of them uniquely and qualitatively describe matrix...

02 March 2018 6,976 10 View

What are theoretical references in differential equations?

02 March 2018 5,218 10 View

What transform or techniques can help in solving or analyzing functional differential equations?

laplace/fouriers transform and some techniques like operators/wronskian ... are useful in solving linear and nonlinear differential equations. however is any such techniques or transformation to...

11 December 2017 1,142 3 View

Which of statistical learning and machine learning works better in theory?

I wonder if there is any explanation that which of statistical learning or machine learning may work better and what is reason for that.

10 November 2017 9,628 9 View

Which software is proper for simulation of partial discharge is SF6?

05 June 2017 2,051 3 View

Can association rule be stated by mixed integer programming or other well known optimization forms?

actually i am willing to model a classic problem of association rule by a standard constraint optimization which can be nonlinear and non-convex too but with minimum number of constraints and...

08 September 2016 6,441 6 View

What is the best set theoretic definition for Time ?

I am looking for a definition of time that address multiple goals! 1- (consistent) be consistent with no paradox with other phenomena.2- (set theoretic) can be expressed based on math notations!3-...

08 September 2016 916 0 View

What is the best alternative to matlab?

Im looking for a matlab like software which is reliable and fast as matlab.both free and comercial products can be the answer.

08 September 2015 7,692 3 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View