正交矩阵
定义: 正交矩阵是一种满足 A T A E A^{T}AE ATAE的方阵 正交矩阵具有以下几个重要性质:
A的逆等于A的转置,即 A − 1 A T A^{-1}A^{T} A−1AT**A的行列式的绝对值等于1,即 ∣ d e t ( A ) ∣ 1 |det(A)|1 ∣det(A)∣…
一、 What are servlets? 1. 定义
(1)Servlets are Java’s answer to CGI:
programs that run on a web server acting as middle layer between HTTP request and databases or other applications.Used for client requests that cann…