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熟悉数值方法在matlab中的运用，灵活运用各类绘图函数，边学边用，加强对数值方法的认识。(Familiar with numerical methods in matlab in the use of flexible use of various types of drawing functions, learning while using, to enhance understanding of numerical methods.)

The Gauss-Seidel technique is intuitive and easy to use on large or small problems. However, you should beware that the convergence tolerance must be carefully selected. Because the convergence criterion is based on the error between iterations, the same convergence criteria may lead to very different results. The direct solution technique presented in Section 2.6.2 is generally preferred over an iterative technique like Gauss-Seidel iteration if a tool such as MATLAB that provides a computationally efficient means of solving sparse matrices is available.

利用改进的fxlms算法降噪，另附有自编fxlms函数代码(The improved noise reduction algorithm fxlms, self fxlms have attached the function code)

层析分析法模型，能实现评价权重的确定，并进行一致性检验(AHP-Analytic Hierarchy Process)

实现speech enhancement的代码 MMSE(Matlab code for speech enhancement, MMSE algorithm.)

二叉树定价模型是期权定价模型中最为简单也是最为实用的定价模型，其极限就是Black sholes定价模型的结果。(Binary tree pricing model is the most simple option pricing model is the most practical pricing model, the limit is Black sholes pricing model results.)

MATLAB求音频短时能量，可以快速用matlab获取音频短时能量(MATLAB and audio short-term energy, you can quickly matlab audio short-term energy)

file contains a simulink modoel of inverter

对于移动通信系统主要有两类衰落：大规模衰落和小规模衰落。大规模衰落表示由于大范围内移动而引起的平均信号能量的减少或路径损耗。而小规模衰落则表现为两种机制：信号的时延扩展和信道的时变特性。对于无线应用，信道的时变特性是由于发射机和接收机相对移动而造成传输路径的变化。这些传播条件的变化速率影响衰落率。如果存在大量反射路径而不存在视行信号分量，此时的小规模衰落称为瑞利衰落(Rayleigh fading)，接收信号的包络由瑞利概率分布函数统计描述。这种衰落也就是这次实验我准备研究的(system for mobile communications fading there are two main categories : large-scale and small-scale fading fading. In view of large-scale decline of large scale movement of the average energy of the signal path to reduce or loss. And the decline of small-scale, it was manifested as two mechanisms : signal delay expansion and channel time-varying characteristics. For wireless applications, channel time-varying characteristics as transmitter and receiver relative movement caused transmission path changes. These conditions spread of the rate changes affect the rate of decline. If there is a large number of pathways exist without depending on the signaling component, At that time, the decline of small-scale known as Rayleigh fading (Rayleigh fading). The received signal envelope from Rayleigh )

永磁电机的模型。逆变器和整流器的控制采用数学模型。(Permanent magnet motor model. Inverter and rectifier controlled by mathematical model.)