安装 HomeBrew 是会提示叫你下载的命令行工具。

最近沉迷学习无法自拔，太久没有码字，码一个小程序留言功能实现。先上一波最后效果图： （删除按钮，是用户自己的留言时才会显示该按钮） 实现技术 后台：SSM框架 数据库：MySQL数据库 数据库设计 评论功能的实现主要涉及三个表 comment：存储留言评论信息，表结构如下： 表中，必须的字段：id，user_id，reply_comment_id，comment，insert_time，source_id 添加了冗余字段username，reply_user_name，userphoto 主要用于存储微信名、回复的微信名、微信头像（这三个字段完全不应该冗余，当小程序用户更换用户名时，

Abstract: In order to make the operation of Beer filling production line automatic and efficient, the control of eachsubsection needs to be optimized. Arranging bottle is the first subsection of the beer filling production line. And therealization of its control function plays an important role in the smooth operation of the entire production line. To addressthe issue of the automatic control problems in the arranging bottle process, PLC (programmable logic controller) technology is applied to realize the design of the control system architecture and control procedures. In the project of the control system, depending on the operating state, the functions of the motors and solenoid valves, which are the key parts, are designed. According to the different operation, timely adjustments are made to improve the system efficiency. Meanwhile, on the basis of the monitoring of the operational status and the design of the program, the system faults are diagnosed, and the appropriate control treatments are made, which achieves an automatic, efficient and stable operation of the arranging bottle process.

S7-200SMART PLC通过RS485接口与西门子SMART LINE系列触摸屏通信具体步骤

ARM公司关于嵌入式系统中不同Cache替换策略的研究论文

使用teechart.dll控件设计的小程序，查询数据库，显示在图表中，可现实条形图(柱形图)\折线图\3D效果图，并且可以调节图的颜色等等

Command_Line_Tools_macOS_10.12_for_Xcode_8.1.dmg 低版本 xcode

NORDIC开发

均匀线阵方向图的三种形成方法

本书是提高论文写作水平的必读书籍，已绝版。本资源是英文原版的扫描版，带书签，清晰度良好。