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Hancheng Zhu


Last seen: 29日 前 |  2021 年からアクティブ

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Calculation with three dimensional matrices
I want to calculate a vector , with each element defined as follows , where is the set of dimensional vector, and is also t...

約1ヶ月 前 | 2 件の回答 | 0

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How to fastly generate a series of complex Gaussian vectors under given covariance matrix Q ？
I have a covariance matrix , which is complex positive semidefinite and its dimension is . Now i want to generate column vector...

2ヶ月 前 | 1 件の回答 | 0

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質問


How to rewrite this high dimensional matrix calculation
Here is the code: X = randn(A,B,C); Z = zeros(A,B,A,B,C); for a=1:A for b=1:B Z(a,b,:,:,:) = X - X(a,b,:); ...

4ヶ月 前 | 2 件の回答 | 0

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How to accelerate the running speed of this code?
function [ S ] = fun(X,A,B,C) %% obtain S from X %% the size of X is A*B*C S = zeros(A,B,C); for a = 1:A fo...

5ヶ月 前 | 1 件の回答 | 0

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質問


A numerical calculation problem leading to Inf or NaN in matlab
I want to calculate the exact value of , where and is a very large positive number. Obviously, we have the bound ,and therefor...

7ヶ月 前 | 2 件の回答 | 0

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質問


How to fastly calculate this matrix operation
A matrix is a dimensional matrix, is a dimensional vector, is a dimensional matrix, is a constant. How to fastly calcula...

8ヶ月 前 | 1 件の回答 | 0

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質問


The product of a vector and a matrix
I have a vector A = and a matrix X = , where is a M-dimensional row vector. Does matlab have an operator that directly give m...

約1年 前 | 1 件の回答 | 0

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Matlab solver for unconstrained convex optimization
I have a large scale unconstrained convex optimization problem as follows min , where and are N-dimensional vectors, is a sc...

約1年 前 | 1 件の回答 | 0

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Optimization problem using fminunc
I have an optimization problem where x is a N-dimensional vector need to be optimized and a1,...,a5 are parameters. I have w...

約1年 前 | 1 件の回答 | 0

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質問


How to efficiently calculate a weighted sum of 3 dimensional matrix through a vector in matlab
A is a 3 dimensional matrix (M*N*K), b is a vector with length K. I need to calculate , which is a 2 dimensional matrix (M*N)....

1年以上 前 | 2 件の回答 | 0

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質問


quadprog is too slow for a convex unconstrained quadratic problem
My algorithm contains solving a unconstrained quadratic problem. f(x) = 1/2*x'*A*x+b'*x, where A is a positive semidefinite matr...

1年以上 前 | 1 件の回答 | 0

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質問


CVX optimization of semidefinite relaxation (SDR) with complex matrix
I need to optimize the following semidefinite relaxation problem Here is my code with CVX tool where N is the size of matr...

2年以上 前 | 1 件の回答 | 0

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質問


Problem of tensor extraction

約3年 前 | 1 件の回答 | 0

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