登录mysql 为新建的库创建账号和授权 创建和授权命令 grant all on test_job.* to job% identified by 12345;flush privileges; 返回信息
grant all on test_job.* to job% identified by 12345
> 1044 - Access denied for user root% to database test_job
> 查询…
一、文章摘要
1. 内容
* Introduction to IR and text processing, system components * Zipf, Heaps, and other text laws * Pre-processing: tokenization, normalisation, stemming, stopping. * Indexing: inverted index, boolean and proximity search * Evaluation m…
文章目录 行列式二阶行列式 n n n 阶行列式行列式的性质克拉默法则行列式的几何理解 行列式
二阶行列式
行列式引自对线性方程组的求解。考虑两个方程的二元线性方程组 { a 11 x 1 a 12 x 2 b 1 a 21 x 1 a 22 x 2 b 2 \begin{cases} a_{11}x_1a_{12}x_2b_1 \\ a_{21}x_…