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求从1到20的阶乘，并且可以推广到N阶阶乘，。(Demand from 1 to 20 factorial, and can be extended to N-order factorial,.)

说明：  人体心电信号的滤波，用一个Butterworth低通滤波器，滤除50Hz工频噪声，并采用不同阶数的Butterworth低通滤波器，比较效果(Human ECG signal filtering, using a Butterworth low-pass filter, filter the 50Hz frequency noise, and different orders of Butterworth low-pass filter, compare results)

this is also good for learning SVM algorithm

说明：  CMMB-业务实施指南_v1.0_20080410.doc(CMMB-Business Implementation Guide _v1.0_20080410.doc)

对信道估计LS算法和MMSE算法的误码率比较(comparison of LS and MMSE )

mat lab code for elim elim E*A = R factorization. E = elim(A) returns the elimination matrix E that gives the reduced row echelon form E*A = R. If A is square and invertible, then E = inv(A). [E, R] = elim(A) returns the elimination matrix E and the reduced row echelon form R.

采用MATLAB实现的kalman滤波程序，有比较详细的例子和算法说明(Kalman filtering using MATLAB implementation procedures, more detailed description of examples and algorithms)

粒子群优化算法的一个寻优案例,测试函数含有多个局部极值，尝试用PSO算法寻找全局极值(a case of Particle Swarm Optimization algorithm.)

利用细菌觅食算法实现物体聚类功能，属于基础未做改进的算法。(Bacterial foraging algorithm object clustering function is basis without making improvements to the algorithm.)

基于MATLAB的仿真环境下的各种实现低通滤波器的方案！我们可以在这个基础上好好的进行研究！(Design FIR filter with firls and remez )