xiaoboyuyugaosi

有限差分法 微分方程和积分微分方程数值解的方法。基本思想是把连续的定解区域用有限个离散点构成的网格来代替， 这些离散点称作网格的节点；把连续定解区域上的连续变量的函数用在网格上定义的离散变量函数来近似；把原方程和定解条件中的微商用差商来近似， 积分用积分和来近似，于是原微分方程和定解条件就近似地代之以代数方程组，即有限差分方程组 ， 解此方程组就可以得到原问题在离散点上的近似解。然后再利用插值方法便可以从离散解得到定解问题在整个区域上的近似解。 (Finite Difference Method Numerical solution of differential equations and integro-differential equation approach. The basic idea is to set a continuous solution of the region with a finite number of discrete points instead of a grid consisting of, these discrete points called grid nodes the solution of a continuous area on a given function of continuous variables used in the definition of discrete grid variable function approximation the original equation and boundary conditions in the micro-business operators to approximate differential, integral with the points and to approximate, so the original differential equations and boundary conditions are replaced by algebraic equations near Side, that is, finite difference equations , solve this equation group can get the original problem in discrete points on the approximate solution. And then using interpolation methods can be determined from the discrete solution of the problem solution of the approximate solution on the entire region)

这里给出了一个基本——万能的套用公式，对于所有的需要进行有理式近似的，当然是基于matlab编程实现！(matlab for polynomial translation,here the code can guide to computing lots of news methods for the polynomial approximating!)

用MATLAB编程的语言，求解对TWTA的无记忆特性的描述(Using MATLAB programming language, solving for TWTA description of the non-memory characteristics)

matlab编程代码中的GUI设计非常有用,都是初级设计，希望有说帮助，(some design about matlab gui)

MMR WiMAX networks sofrware requirement by REWIND project group

a document explaining a DSSS transmision channel and how to make a rake receiver with simulations

采用bp神经网络对函数y=sin（x）进行训练，然后用测试集对训练的函数进行测试，也就是函数逼近sin（x)的曲线(Bp neural network using the function y = sin (x) for training, and then use the test set to test the training function, that is, function approximation sin (x) curve)

二阶中心差分滤波器，具有较强的跟踪性和较宽的应用范围，数值稳健 (Second-order central difference filter, with a strong track and a wide range of applications, numerical robustness)

说明：  Crank-Nicolson格式求解抛物型方程(Solving parabolic equation with crank Nicolson scheme)

此代码仿真了一个语音输入输出系统，语音信号经过AD转换后，经过DSSS调制解调后，通过DA转换还原输入的声音，每一步的的波形都可以观测，对实际DSSS系统设计有很大的参考价值(This code simulation of a voice input and output systems, speech signal after AD conversion after DSSS modem through DA conversion to restore the input voice, each step of the waveform can be observed, the actual design of DSSS systems have great reference value)