登录websql地址: select TABLE_NAME from information_schema.tables where TABLE_SCHEMA='rebate';查询表名 select column_name from information_schema.columns where table_schema='rebate' and table_name='t_rebate_plan';在根据表名查列名
** [最新版1909 (updated Jan 2020)]Windows10操作系统官方原版镜像 ** 持续更新中 目前至2020/1/30 Windows10操作系统最新版是1909 (updated January 2020),下面是下载地址(请使用下载工具下载,推荐迅雷) Windows 10 (business editions), version 1909 (updated Jan 2020) (x64) - DVD (Chinese-Simplified)[该版本为商业版64位]
一 Hessian矩阵: 实值函数f(x)相对于 n×1 n × 1 n\times 1实向量x的二阶偏导是一个由 m2 m 2 m^2个二阶偏导组成的矩阵(称为Hessian矩阵),定义为: ∂2f(x)∂x∂xT=∂∂xT[∂f(x)∂x] ∂ 2 f ( x ) ∂ x ∂ x T = ∂ ∂ x T [ ∂ f ( x ) ∂ x ] {\partial ^2f(x)\over \partial x \partial x^T}={\partial \over \partial x^T}[