Shekha Rai

13 Questions 1 Answers 0 Followers

Questions related from Shekha Rai

Latex file for Taylor & Francis journal of electrical power & components?

Does anyone have the latex template for Taylor & Francis journal of electrical power & components?

05 May 2016 3,248 2 View

Code for Ibrahim time domain technique?

I need the matlab code for Ibrahim time domain technique

04 April 2016 7,503 0 View

Code for Natural excitation technique in matlab?

I need to get the impulse response from natural excitation technique.Can anyone give me the matlab code for Natural excitation technique?

03 March 2015 457 3 View

Is there any advantage of taking pseudoinverse of a covariance matrix?

I have found that sometimes inverse and pseudo inverse of a covariance matrix are the same whereas it is not true always. is there any relation between pseudoinverse and nonsingularity?

11 November 2014 8,900 2 View

Does taking pseudoinverse of a covariance matrix makes sense?

if A is not a covariance matrix Ax=b; (1) x=pseudo(A).b (2) I can understand eq 1 and 2 that is uses least square to find x since A may not be invertible. But if R is...

11 November 2014 1,218 0 View

Is it reasonable to assume that covariance matrix is positive definite ?

In general it is assumed to be positive semi definite. What are the consequences of assuming the cov matrix as positive definite

11 November 2014 2,911 0 View

Covariance matrix and its inverse?

If R is the covariance matrix, then to find the inverse of R , which one is more appropriate to use? inverse or pseudo inverse.Is there any relation with singularity of the covariance matrix?

11 November 2014 2,194 0 View

Why flipr is used for a column vector?

I understand that flipr flipps columns in the left-right direction. I need to clarify the code b=[ -1.7667 1.0161];b1=[fliplr(b) 1];g=(roots( b1 )); what is the impact of fliplr on g? Is this a...

11 November 2014 1,751 0 View

Can frequency error be updated from phase?

If I use the actual frequency for a ramp signal to calculate phase, I get the correct phase. But if I use the estimated frequency (which has fluctuations) for phase calculation, I get phase...

11 November 2014 8,215 1 View

How can one modify the code varpro.m for exponentially damped sinusoids?

I got an example of the code varpro where three variables ( alpha1, alpha2 and alpha3) are used with two basis functions((phi1 ,phi2)which are functions of alpha. I need to model the signal to...

10 October 2014 1,563 1 View

Can exponentially damped sinuoidal signal be modelled for variable projection method?

I got an example of the code varpro where three variables (alpha1, alpha2 and alpha3) are used with two basis functions (phi1 ,phi2) which are functions of alpha. I need to model the signal for...

10 October 2014 6,564 1 View

Why do estimation techniques based on least square approach fail in the presence of outliers?

How does outliers affect the least square technique. Is there a relation between least square technique and covariance matrix of the data?

10 October 2014 3,269 9 View

Why high variance noise change the direction of eigen vector?

I need a simple explanation based on linear algebra.

10 October 2014 4,296 0 View