Laplas-Elemination

RAYLEIGH FADING MODEL GENERATION

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本文在分析移动无线信道衰落特性的基础上,阐述了OFDM系统的基本原理,主要研究了OFDM通信系统中的基于导频符号的信道估计问题,分析了几种经典的信道估计算法以及相关的关键技术环节。 在此基础上介绍了OFDM技术在现实中的一个应用——WLAN IEEE802.11a系统模型,利用Matlab仿真软件完成OFDM系统信号生成、噪声生成、导频插入、循环前缀、调制、解调等部分的设计,最后结合计算机仿真对系统关键技术(导频、循环前缀、估计算法)的有效性和可行性进行了全面的分析与比较。适合matlab研究(Based on the analysis of mobile channel fading characteristics based on the OFDM system on the basic principles of research in the OFDM communication system of the pilot symbols based on channel estimation problem, an analysis of several classical channel estimation algorithm and the associated key technical links. On this basis, introduced OFDM technology in a practical application- WLAN IEEE802.11a system model, using Matlab simulation software to complete OFDM signal generation, noise generation, pilot insertion, cyclic prefix, modulation, demodulation and other parts of the design, the final combination of computer simulation of the system of key technologies (pilots, cyclic prefix, it is estimated that algorithm) the effectiveness and feasibility of a comprehensive analysis and comparison. Suitable for research matlab)

锅炉燃烧过程MATLAB仿真程序，很简单很容易(MATLAB simulation program the boiler combustion process is very simple and very easy)

利用Mindlin解，求解弹性半无限体内作用水平集中力引起的任一点的位移。(The soil movements of Mindlin solution introduced by a single horizontal force in semi-inifite plate.)

This is simple model for photo voltaic cell (solar cell) using simulink/matlab

MATLAB简单的计算白色轮廓中的像素点的个数(MATLAB a simple white outline of the calculation of the number of pixels)

：首先介绍了系统辨识的基本原理，简要介绍了Matlab中系统辨识 的实现方法。并结合具体的例子，显示Matlab系统辨识工具箱在系统辨 识中的强大功能和辨识快速准确等优点。(This paper introduces the basic theory of System Identification，the realization method in Matlab and presents the strong function of System Identification toolbox with the merit of fast，precision and SO 011 by an example．)

Power flow studies, commonly known as load flow, form an important part of power system analysis. They are necessary for planning, economic scheduling and control of an existing system as well as planning its future expansion. The problem consists of determining the magnitudes and phase angle of voltages at each bus and active and reactive power flow in each line. In solving power flow problem, the system is assumed to be operating under balanced conditions and a single-phase model is used. Four quantities are assumed at each bus. These are voltage magnitude v, phase angle  , real power P, and reactive power Q.The Newton Raphson method of load flow analysis is an iterative method which approximates the set of non-linear simultaneous equations to a set of linear simultaneous equations using Taylor’s series expansion and the terms are limited to first order approximation.

显示梯度图像，寻找图像中最大像素值并找出边界。(show the gradient of a picture,find the edge of big pixel in a picture)