一种矩阵运算：又叫 Hadamard product，element-wise product, pointwise product and the Schur product. For two matrices A and B of the same dimensions, the Hadamard product A ~ B is a matrix of the same dimensions, which has elements explicitly:能看懂吧，同样大小的矩阵，然后按照上述规则合一块儿...
