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DC/DC斩波电路，给定一个设置电压后，能够快速跟踪该设置电压，适用于直流(DC/DC converter circuit, a setting after a given voltage, can quickly track the set voltage, for DC)

一个很好的matlab编程绘制B样条曲线，(Matlab program to draw a good B-spline curve,)

说明：  使用matlab程序实现了由随机序列到码元电平、m序列直接扩频解扩、qpsk调制解调，射频调制解调一个完整的qpsk系统过程(Matlab program to use by the random sequence to the symbol level, m direct sequence spread spectrum despreading, qpsk modulation and demodulation, RF modulation and demodulation of the QPSK system, a complete process)

matlab程序源码书籍，其中包含多个实例，是个新手学习的不错的书籍，并且包含一个surface用法实例代码(matlab program code book, which contains more than one instance, is a novice learning good books, and contains a surface usage example code)

数字信号处理应用仿真程序，感谢北航自动化学院王秋生老师(Digital signal processing applications simulation program, thanks to Northern College of Automation, WANG Qiu-sheng teacher)

Lorenz说：“在巴西的蝴蝶拍打翅膀会引发德克萨斯州的一场龙卷风吗？”，就是“蝴蝶效应”，是由三维常微分方程组描述的，本算法用来计算蝴蝶效应("Does a butterfly flapping its wings in Brazil trigger a tornado in Texas?" Lorenz said" The butterfly effect is described by the three-dimensional ordinary differential equations. This algorithm is used to calculate the butterfly effec)

说明：  基于LCL并网逆变器pq控制的matlab仿真(PQ control based on LCL grid-connected inverter)

用modelica语言编写完成的数据采集电路的模型，可以用来在openmodelica软件中仿真(Complete with modelica language data acquisition circuit model that can be used in openmodelica simulation software)

对于球形颗粒物，r为球的半径但非球形颗粒物，r还不确定。 水中由悬浮颗粒物产生的光散射引起光子的传输方向发生变化，光子已偏离了准直方向。但不会改变光子的其他特性随机过程。 (scattering light transmission in water )

Matlab编程实现FFT变换及频谱分析的程序代码（适合初学者加强理解）。（1)用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图；(2)进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选；(3)做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱；(4)用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图。(Matlab codes for FFT Understanding which contains sine wave,rectangular wave and the reletaed frequency spectrum figure about MSE,Log,IFFT and so on.)