butterworth

说明：  S函数的BP神经网络PID控制器Simulink仿真(S function of BP neural network PID controller Simulink simulation)

EMD分解，可以有效的解决EMD分解问题，并嫩而过画出希尔伯特谱(EMD decomposition, can effectively solve the problem of EMD and tender and had drawn Hilbert spectrum)

飞行器在某高度平飞时舵面偏角和飞行马赫数之间的关系(it describes the relationship between elevator declination and flight mach number，when flight fly on some hight.)

说明：  清华大学数学建模讲义,可以帮助大家更好的学习数学建模这种课程.(Tsinghua University, Mathematical Modeling handouts that can help us better learning mathematical modeling of such courses.)

PCA人脸识别 的源代码 在matlaB 里面实现的(PCA MatlAB FaceRec.m eigface Reconstruct.m calc xmean,sigma and its eigen decomposition)

MPC模型预测控制算法，包括有约束和无约束模型预测控制MATLAB仿真(MPC model predictive control algorithm, including constrained and unconstrained model predictive control MATLAB simulation)

说明：  环境：matlab 算法：FCM 功能：对iris数据的分类(Environment: MATLAB algorithm: FCM function: classification of iris data)

求解矩阵的LU分解和逆，两种一般方法求解线性方程组的解。(LU matrix factorization and solving the inverse, two general methods for solving linear equations.)

说明：  tsp的算法讲解和实现，适合学生应用，也适合需要者参考(tsp explanation and implementation algorithms, suitable for students to use, but also for those who need information)

有关工频噪声的滤波算法的算法实现，分别用C语言和Matlab语言(you guan gongpin zaosheng de lv bo suanfa de suanfa shijian fenbie yong C and Matlab)