Is it possible to have repeated eigenvalues and linearly independent eigenvectors corresponding to the repeated values?

07 August 2016 7,791 12 View

What is the difference between the autocorrelation of a stationary signal and non-stationary signal?

If one takes the autocorrelation of a stationary signal, and then that of a non-stationary signal, then would it be possible to say which one is stationary from the ACFs?

31 December 2014 9,609 5 View

What is the geometrical interpretation of multiplying a matrix by the inverse of another matrix?

What happens geometrically when one multiplies a matrix A by the inverse of a matrix B?

31 December 2014 5,200 5 View

What is the advantage of multivariate change point detection over univariate change point detection?

In a multivariate time series, what extra information does performing multivariate change point detection provide than performing univariate change point detection of individual time series? Both...

11 December 2014 5,439 3 View

How should I handle zero R2 values?

Consider a time series (stationary or non-stationary). I fit a linear model of order 0, i.e., an intercept to the data. In the stationary case, this corresponds to the mean. Now, when I calculate...

10 November 2014 7,015 13 View

How can one identify a wrong parameter in a state space model?

I have a state space model - linear or non-linear. I know that there is (are) wrong parameter(s) in the model (the model structure is correct though). Is there a method to isolate the wrong...

09 October 2014 2,513 6 View

What is the discrete equivalent of complex conjugate poles on imaginary axis for continuous case?

If there are complex conjugate poles on the imaginary axis (+jw and -jw) for a continuous system, what would be the location of the poles of the equivalent discrete time system?

08 September 2014 4,124 5 View

What measures exist for characterising and classifying segments of data acquired over a period of time?

I have measurements from a system over a long period of time. During this time, the system has been in different states (for example, different controller tuning configurations). Now, looking at...

07 August 2014 3,337 7 View

Performance of EKF changes with noise in MATLAB?

When I change the seed of random noise generation in MATLAB, keeping everything else fixed, the performance of the EKF and also UKF (MSE, ACF of the estimation errors, etc.) changes every time....

01 February 2014 1,604 16 View

What is the effect of DC on fft in MATLAB?

What would be the effect of a dc component on the fft of a signal with time varying frequency content?

01 February 2014 4,364 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

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 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