modal_identification

说明：  MATLAB计算孔径的菲涅尔衍射，用于计算孔径的FRESNEL衍射图样，MATLAB语言，利用MAPLE工具。(MATLAB to calculate aperture FRESNEL diffraction, used to calculate aperture FRESNEL diffraction pattern, MATLAB language, using MAPLE tool.)

homedvr数字视频监控系统是HomeDVR监控卡配套客户端，支持多种芯片型号(homedvHomeDVRssamdmsamdsawdasjld a)

基于51单片机实现单片机的IO口输出PWM波形，实现呼吸灯的制作。(Based on 51 single chip computer, the output of PWM waveform from IO port of single chip computer is realized, and the manufacture of breathing lamp is realized.)

SPWM生成 单相 三相逆变(SPWM generates single-phase, three-phase inverter)

说明：  把AutoCAD的VLX文件反编译成FAS文件(Decompiles VLX files of AutoCAD into FAS files)

可以实现对电力系统暂态的仿真。包换自动重合闸装置。(The simulation of power system transient can be realized. Replacement of automatic reclosing device.)

采用clean算法对信号频谱进行处理，达到滤波的效果(Using clean algorithm to process the signal spectrum to achieve the effect of filtering)

ls-dyna example 2, user mat test

说明：  齿轮动力学分析，计算吸引子，庞加莱截面图，返回映射吸引子等(Gear dynamic analysis, calculation of dynamic load factor, displacement acceleration and so on)