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COMSOL Multiphysics有限元法多物理场建模与分析(The book of COMSOL)

matlab音频处理工具箱colea，仅参考及学习。(matlab audio processing toolbox colea, only a reference and learning.)

解相干MUSIC算法 非常有用 matlab 阵列信号处理 新手必学(Coherent MUSIC algorithm is very useful for the novice array signal processing matlab will learn)

基于MATLAB的数字信号处理的电子书，本人认为不错，可以慢慢的研究(MATLAB-based digital signal processing of e-books, I think that is true, you can study slowly)

设计一个IIR数字低通滤波器， 逼近一组模拟滤波器的指标参数（通带截止频率Wp=2*pi*2000rad/s,阻带边界频率Ws=2*pi*3000rad/s,通带波纹 Rp=3db, 阻带衰减Rs=15db, 采样频率f=10000Hz）； 分别用脉冲响应不变法和双线性变换法实现设计，列出传递函数并描绘模拟和数字滤波器的幅频和相频响应曲线。用上述设计滤波器完成几组给定信号的滤波，证明滤波器的有效性和滤波范围限制.(Design a IIR digital low-pass filter, approaching a group of analog filters indicator parameters (pass-band cut-off frequency Wp = 2* pi* 2000rad/s, stop-band edge frequency Ws = 2* pi* 3000rad/s, pass-band ripple Rp = 3db, stop-band attenuation Rs = 15db, the sampling frequency f = 10000Hz) were used to change the impulse response method and bilinear transformation method for design, list and describe the transfer function of analog and digital filter amplitude-frequency and phase-frequency response curve. A filter was designed with the completion of the above-mentioned groups of a given signal filtering, to prove the effectiveness of filters and filter limit)

有关零相位滤波器的设计介绍，采用无限脉冲响应滤波(For zero-phase filter design introduced with infinite impulse response filter)

Single-Phase half-controlled bridge rectifier ALPHA=120

矢量控制方法在matlab/simulink中的仿真模型。详细且基础，有助于新手学习。(Vector control method in matlab/simulink the simulation model. Detailed and foundation to help novices learn.)

code for cooperative sensing

四乘四线性阵列超声成像程序，叠加波束合成，逐点成像成像方式(four send and four receive liner ultrasonic imaging,DAS )