PLL

NPC三电平逆变器SVPWM仿真模型，平台matlab2007。(NPC three level inverter SVPWM simulation model, platform MATLAB2007.)

说明：  天然气网的最优潮流计算，代码详细、含对象的图形描述，可直接用(Optimal power flow calculation of natural gas network, detailed code)

说明：  为了感谢惠俊英老师的谆谆教诲，再为好奇诸君奉上水声物理--海洋传播声场模拟的一份武林秘籍--海洋传播声场抛物方程解算方法--RAM！ 当好奇诸君阅毕此卷，再对照轻松跑完作业，即入门 RAM！ RAM 与 AcousticsToolbox 遵照 GNU 公共许可证进行分发。感谢Michael D. Collins 对 RAM 的原创，也感谢由 Free Software 凝聚起来的自由科学家社区(In order to thank Professor Hui Junying for his teachings, and then offer you a secret book of underwater acoustic physics, ocean propagation sound field simulation, the parabolic equation solution method of ocean propagation sound field, RAM! When curious gentlemen read this volume, and then compared with easy running homework, that is, access to RAM! RAM and Acoustics Toolbox are distributed under the GNU Public License. Thanks to Michael D. Collins for his original RAM and to the Free Software community of free scientists.)

利用netcd库 python语言读取nc气象文件(Using Python language of netcd library to read NC meteorological files)

模拟地震信号，实现直达波与反射波及折射波的交点求取(Simulation of seismic signal to realize the intersection of direct wave with reflection wave and refraction wave)

说明：  至今几十个经典项目详细的开发文档举例!!(The development of detailed project documentation classic example!!)

KTV点歌系统：包括拼音点歌、分类点歌、排行点歌、字数点歌。本系统由北大青鸟学员所作！(KTV VOD system: including Pinyin song, classification VOD Top song, word song. This system made by the Beida Jade Bird trainees!)

说明：  空间计量Elhorst的所有程序，已经加载了matlab的计量程序，可以通过修改读入文件的路径一次性成功。(All the procedures of spatial mathmetrics by Elhorst, which can be successfully operated once by modifying the path of reading files.)

大学高等数学（同济版）的latext编程课件，可供使用者修改(Latxt Programming Courseware of Higher Mathematics (Tongji Edition) for Users to Modify)

使用MATLAB/SIMULINK创建汽车EPS模型，进行汽车转向仿真。(Using MATLAB/SIMULINK to create the car EPS model for vehicle steering simulation.)