envelope

This text deals exclusively with signal processing of digital data, although Chapter 1 briefly describes analog processes commonly found in medical devices. This text should be of interest to a broad spectrum of engineers, but it is written specifically for biomedical engineers (also known as bioengineers). Although the applications are different, the signal processing methodology used by biomedical engineers is identical to that used by other engineers such electrical and communications engineers. The major difference for biomedical engineers is in the level of understanding required for appropriate use of this technology. An electrical engineer may be required to expand or modify signal processing tools, while for biomedical engineers, signal processing techniques are tools to be used.

说明：  外国人开发的电磁时域有限差分方法工具包 Electromagnetic Finite-Difference Time-Domain (EmFDTD) is a basic two-dimensional FDTD code developed at the School of Electrical Engineering, Sharif University of Technology. This code has been written based on the standard Yee s FDTD algorithm. Applications include propagation, scattering, and diffraction of electromagnetic waves in homogeneous and non-homogeneous isotropic media for in-plane propagating waves. Negative permittivites or permeabilities as well as dispersion is not included. Zero, Periodic, and Perfectly Matched Layer boundary conditions may be selectively applied to the solution domain. The program is best suited for study of propagation and diffraction of electromagnetic waves in Photonic Crystal structures. EmFDTD is written in MATLAB language and has been tested under MATLAB 5.0 and higher versions.(Foreigners developed electromagnetic FDTD method Toolkit Electromagnetic Finite-Difference Time-Domain (EmFDTD) is a basic two-dimensional FDTD code developed at the School of Electrical Engineering, Sharif University of Technology. This code has been written based on the standard Yee s FDTD algorithm. Applications include propagation, scattering, and diffraction of electromagnetic wavesin homogeneous and non-homogeneous isotropic mediafor in-plane propagating waves. Negative permittivites or permeabilities as well as dispersion is not included.Zero, Periodic, and Perfectly Matched Layer boundaryconditions may be selectively applied to the solution domain.The program is best suited for study of propagation anddiffraction of electromagnetic waves in Photonic Crystalstructures.EmFDTD is written in MATLAB language and has beentested under MATLAB 5.0 and higher versions.)

说明：  gauss消元法求解方程组，可以准确的利用gauss消元法求解线性方程组 (gauss elimination method for solving equations, you can accurately use gauss elimination method for solving linear equations)

实现线性卷积、圆周卷积、周期卷积的动态演示，以及采样定理，滤波器的设计。(Achieve linear convolution, circular convolution, convolution cycle dynamic presentation, and the sampling theorem, the filter design.)

Linear Assignment Problem solver for Matlab

基于小波变换的语音增强的语音去噪的MATLAB源程序(Wavelet-Based Speech Enhancement Speech Denoising MATLAB source code)

PMSM的simulink模型，MATLAB版本6.5(PMSM the simulink model, MATLAB Version 6.5)

快速高斯滤波工具箱（fast guassian toolbox），具有良好的滤波效果，希望大家可以用来进行探讨。(Fast Gaussian filter Toolbox (fast guassian toolbox). good filtering effect, we hope can be used to explore.)

蚁群聚类算法，实现无线传感网络负载均衡。(Ant colony clustering algorithm for wireless sensor network load balancing.)

说明：  最优化算法中得拟牛顿法和共轭梯度法,以及Armijo型搜索和最优步长搜索。(Congradient and NiNewton algorithms in optimazation based on MATLAB)