在线考试系统，虽然有些粗糙，希望有人能用得上！-Online examination system, although some rough, I hope someone that can use!

该课程及成绩管理系统是用java开发的，样式设计虽然粗糙，功能比较单一，但严密性较好，可作为入门练手之用-The course and the performance management system is the java language, style design, while rough, single function, but the rigor is better, can be used as entry to practice their hands

完整版 自己粗略二次开发的“历史上的今天”程序 完美-Full own rough secondary development of the " Today in History" program perfect

三维随机粗糙面，可修改其相关函数或均方高度等参数-Three-dimensional random rough surface, it can modify its associated functions or parameters such as mean square height