Fem-2d-truss

基于BP网络预测的matlab程序，可以用于BP网络预测，matlab编译通过(BP network based on the forecast matlab procedures, can be used in BP network prediction, matlab compiler through)

说明：  这是基于matlab6.5 用于仿真设计双曲面放射镜的程序，后续开发将完善参数分析部分！(This is based on the design for simulation matlab6.5 mirror hyperboloid radiation procedures, subsequent development will improve the parameters of part!)

说明：  FSK在Rayleigh 衰落下的matlab误码率仿真，包括理论计算和仿真结果(FSK in Rayleigh Fading matlab error rate simulation, including theoretical calculations and simulation results)

说明：  本代码是GAUSS-SEIDEL迭代法、选主元JORDAN消去法、简单GAUSS消去法、选主元GAUSS消去法的MATLAB程序，有详细注释，可直接调用(This code is GAUSS-SEIDEL iteration, pivoting JORDAN elimination, simple GAUSS elimination, pivoting GAUSS elimination of the MATLAB program, with detailed notes, can be called directly)

高性能的话音激活检测算法，适应性很强，具有较好的实际使用性能，可以获得很好的使用效果。(High-performance voice activity detection algorithm, adaptable, good practical use, you can get good use of effects.)

人口灰色预测模型可以在数学建模中应用，预测人口数量的变化，灰常灰常灰常有用。(gm grey prediction may not be perfect but it s useful u know. used in mathmatical test for population prediction. very very useful)

设计一维纳滤波器。 （1）产生三组观测数据，首先根据s(n)=as(n-1)+w(n)产生信号s(n)，将其加噪(信噪比分别为20dB，10dB，6dB)，得到观测数据x1(n)，x2(n)，x3(n)。 （2）估计xi(n)，i=1,2,3的AR模型参数。假设信号长度为L，AR模型阶数为N，分析实验结果，并讨论改变L，N对实验结果的影响。 (Design a Wiener filter. (1) generate three sets of observations data, first according to s (n) = as (n-1)+w (n) to generate a signal s (n), which add noise (SNR respectively 20dB, 10dB, 6dB), obtained observation data x1 (n), x2 (n), x3 (n). (2) estimate xi (n), i = AR model parameters 1,2,3. Assuming the signal length L, AR model of order N, analysis of experimental results and discuss changes affect L, N of the experimental results.)

基于最小均方误差方式进行波束成形，其仿真图形为角度和幅度的关系。(Method based on minimum mean square error beamforming, which is a simulation graph of the relationship between the angle and magnitude.)

CA码产生与自相关计算，为matlab程序文件可以用来产生适用于各个卫星的CA码(CA code and autocorrelation)

核主成分分析方法是主成分分析的改进算法，其采用非线性方法提取主成分(Kernel principal component analysis method is an improved algorithm of principal component analysis, which uses a nonlinear principal components extracted)