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matlab file for cample bozorgnaia 2004 attenuation code

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Pscad software is needed to run the simulation file.

T形桥接网络是一种常用的滤波网络中，用MatLab求其状态空间模型，画出该电路的零——极点图。(T-shaped bridge network is a kind of filter commonly used network, use MatLab for its state-space model, draw the circuit zero- Pole map.)

ＭATLAB代码,利用谱减法实现语音信号增强.经过测试,效果不错.(MATLAB code, the use of spectral subtraction to enhance the realization of the speech signal. After testing, good results.)

分析了维纳滤波器均方误差及滤波性能与阶数和噪声方差之间的关系(Analysis of the Wiener filter and the filter mean square error performance and the order and the relationship between noise variance)

利用牛顿法和拟牛顿法解非线性方程组，实验验证有效。(Newton method and quasi Newton method for solution of nonlinear equations, which has been experimentally verified and proven to be useful.)

说明：  预估校正控制，通过一种数值近似的计算方法不断逼近，从而实行控制计算。(A Predictor-Corrector )

说明：  MATLAB help file for Newton rapson