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Questions related from Ning Cai
It is said that the diversity of certain genes evolves in human history. See: Li H, et al. (2011) Diversification of the ADH1B gene during expansion of modern humans. Ann Hum Genet,...
10 October 2016 8,400 4 View
Consider a parameter space Rn, comprising points a=[a1, a2,...an]'∈Rn. Suppose we've got two constrained sets within the space. The first is linearly constrained: f(a1, a2,...an)=0, with f() being...
08 August 2016 579 7 View
When playing games, we pursuit the feelings of being in a real world. So it will be nice if the NPCs act like real humans. But till now, I've never seen any off-line RPG with human-like NPCs. It...
01 January 2016 302 1 View
I need to handle such a problem. Consider the following equation: P-1(A+E)P=B with A and B given and E optional. How to find an optimal E to minimize both...
06 June 2015 8,965 5 View
A nonsingular matrix maybe very close to a singular one, e.g. if the absolute values of elements in a row are all very small, then such a matrix is nearly singular. I can easily select a...
02 February 2015 2,390 6 View
I'm now interested in pedigree classification of languages. Who knows some computational quantified method to classify different existing languages or to measure the distance between any two...
01 January 2015 9,887 3 View
I need to solve linear equation like this: A*X=B where A is square and singular. Any one feasible solution is OK and just what I need. It is solvable manually but too troublesome if the dimension...
12 December 2014 1,668 5 View
The eigenvalues of εA+(1-ε)B (0
08 August 2014 361 6 View
Suppose that A is a matrix which is marginally stable and K stabilizes A through the fact that A+K is asymptotically stable. Then is it true that A+εK must also be asymptotically stable for any...
08 August 2014 1,186 9 View
