Imp

这是一个简单的语音基音检测方法，通过对语音信号进行滤波、分帧、求自相关函数，可得到浊音的基音周期，从而实现基频检测。(This is a simple voice pitch detection, voice signals by filtering, sub-frame, find the autocorrelation function, voiced the pitch period available to achieve the fundamental frequency testing.)

Create a 512-length signal then low-pass filter the signal with the filter

说明：  常用小波程序,使用matlab程序编写。(Process-matlab wavelet used to prepare)

Active filter and control strategies

粒子群算法详细的程序，埃及人wael korani写的采用粒子群算法（pso）代码调用simulink模型优化pid参数，与大家共享(PID and State Feedback Control of DC Motors)

编写S函数模块，实现两路正弦信号的叠加，正弦信号相位差为60度(Writing S function module, the superposition of two sinusoidal signals, sine signal phase difference of 60 degrees)

国外几何光学、光学设计经典入门教材，浅显易懂，比较全面(Foreign geometrical optics, optical design classic entry materials, easy to understand, more comprehensive)

经验模态分解(Empirical Mode Decomposition,EMD)法是黄锷(N. E. Huang)在美国国家宇航局与其他人于1998年创造性地提出的一种新型自适应信号时频处理方法，特别适用于非线性非平稳信号的分析处理。(Empirical Mode Decomposition)

matlab几则设计经验，非常好用,word 文件(a few design experience for matlab, very easy to use)

用matlab做的有限元编程的源代码，子例程丰富(Using matlab to do finite element programming source code, extensive subroutine)