Writer:BYSocket(泥沙砖瓦浆木匠) 微博:BYSocket 豆瓣:BYSocket Reprint it anywhere u want. Written In The Font I am writing at home.Today it is windy,but I am feeling isuitable and warm.Why the title is called ‘Be a Coding Plasterer’? I think that a good computer…
Writer:BYSocket(泥沙砖瓦浆木匠) 微博:BYSocket 豆瓣:BYSocket Reprint it anywhere u want. Written In The Font When we to set some constants for projects, we always use ‘public static final’to set Int or String constants.Or sometimes,we can also set the paramters…
1. 矩阵与映射 矩阵和映射包含两方面的关系: 简单:已知矩阵 M, 从向量 x 映射到 M * x. (注:矩阵与行向量的点乘) 稍微复杂:已知映射 x ->M * x, 求矩阵 M. 第一种情况直接运算就可以得到映射,就不详细写了,着重写第二种情况. 首先,假设 x 为 n 维行向量, M*x 为 m 维列向量,可以知道 M 是 m × n 大小的矩阵.在点乘里面,M 的列向量是基向量, x 向量的每个分量是线性组合的系数,M 矩阵可以写成: 怎么求出 v1, v2, ..., vn 向量呢…