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Questions related from Ning Cai
Suppose s = f(x)*g(y)*h(z), where series data set {s, x, y} is known but {z} is unknown (with referential interval), meanwhile functions f(•) and g(•) have unknown parameters α and β...
21 January 2021 6,520 3 View
I teach the undergraduate course "Modern Control Theory". Recently, I find this simple question puzzling: Suppose we've got state equation dx/dt = Ax+Bu+f(t), where x is the state vector and f(t)...
24 June 2017 10,003 7 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...
03 June 2015 5,366 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...
21 February 2015 6,879 5 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...
17 December 2014 1,953 6 View
We all know that if an LTI system is completely controllable, it can be transformed into a controllability canonical form. But what's the use of such a canonical form? We know that it may be of...
16 October 2014 6,984 4 View
