We have known that the asymptotic determinant of the covariance matrix when its order goes to infinity.
I am wondering whether there is the close form in the finite case? Thanks,
This was dealt with to some extent by Hansen in Journal of Econometrics Volume 141, Issue 2, December 2007, Pages 597–620 with article entitled Asymptotic properties of a robust variance matrix estimator for panel data when T is large
Thank you, Dr. McClelland. That will very helpful.
Pengda
I wonder what would be the use of such an information. For some proof? Practical?
A wild guess is 0
Thank you, Dr. Marek Wojciech Gutowski!
Does any IEEE journals accept the circuits (Antenna/RF/Basedband/SOC) articles which is based on simulations only(e.g. ADS, LabVIEW...)?
01 February 2020 9,930 3 View
We can easily find the good theoretic rate bound of dirty paper coding. I am wondering whether it's a practical coding? Can any conventional coding, such as superposition coding, can beat it? Thanks,
01 February 2017 3,674 0 View
In MIT-BIH ECG database, I did not find the instruction about the sampling period. I am wondering anyone can inform me that? Thanks,
07 August 2015 4,882 4 View
Hi all, We all know the conclusion that the MMSE estimation in the background of Gaussian noise is in the linear form. How this result is proved? Thanks,
01 February 2015 928 6 View
As I know, there is a good paper talking about this, B. R. Bennett, 'Spectra of Quantized Signal' 1948. I am wondering there is newer report on this topic for the signal with colored spectrum?...
31 December 2014 9,924 0 View
For simplicity, what is the explicit expression of integral (3 dimension for example), \int_{x1} \int_{x2} \int{x3} exp(-(k1*x1+k2*x2+k3*x3)^2) dx1 dx2 dx3 The attached figure shows the integral...
31 December 2014 610 7 View
In many case we approximate histogram of a data set as the probability density function. Can we quantize the difference between the PDF and the histogram? Is there analytic expression to describe...
11 December 2014 8,472 10 View
Hi, From the introduction of the ITU models, I find the spectrum for each tap is specified, e.g. classic, flat. Are there any specification on the distribution for each tap? In other words, the...
10 November 2014 9,534 4 View
X(t)=B(t)N (A(t): binary Markov; N is white Gaussian) A(t) is a binary Markov process; N is white Gaussian variable; Is the product between A(t) and N a spherically invariant process? Thanks
10 November 2014 552 1 View
Wiener filter is a MMSE estimator. The thing I am concerned about is whether it works in any type of additive noise? Does the expression of WF $H_{wf}(f)={S_{xy}(f)}/{S_{xx}(f)+N(f)}$ fits for...
09 October 2014 9,787 2 View
I would like to learn more about SPSS and Its application especially in regards to data analysis. Please suggest me how I can learn more about it. Thank you so much.
11 August 2024 9,101 4 View
I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?
11 August 2024 5,138 1 View
Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!
11 August 2024 3,770 4 View
Willett, Shenoy et al. (2021) have developed a brain computer interface (BCI) that used neural signal collected from the hand area of the motor cortex (area M1) of a paralyzed patient. The...
10 August 2024 7,180 0 View
I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...
10 August 2024 4,005 2 View
I'm currently exploring the application of Python in textile engineering, specifically in areas like data analysis, process automation, and the development of smart textiles. I'm interested in...
10 August 2024 7,429 2 View
How can I use the cif data obtained from rietveld refinement extracted via gsas2, for microstructural analysis using ETEX software?
09 August 2024 7,718 0 View
I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...
09 August 2024 5,048 2 View
One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...
08 August 2024 6,690 1 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View