spfilt

结合DCT和NNC进行人脸识别。先利用DCT提取特征，然后利用最近邻分类器分类，在ORL人脸库上测试效果不错。(The combination of DCT and NNC for face recognition. First DCT Feature Extraction, and then use the nearest neighbor classifiers, good test results on the ORL face database.)

计算一个平面桁架结构的总体刚度矩阵，最后以图形形式显示出桁架结构(Calculation of a plane truss structure' s overall stiffness matrix, the last show in graphical form of truss structure)

时域基音检测的基本原理和方法。基音检测的预处理和后处理的基本思想和方法。基于归一化互相关函数的基音检测算法。 (Basic principles and methods of time-domain pitch detection. Pitch detection, pre-and post-processing of the basic ideas and methods. Pitch detection algorithm based on normalized cross-correlation function.)

用路径跟踪法求解不等式约束的凸二次规划，即沿着此路径(或邻域)可以逼近问题的最优解。(With the path tracking method for solving inequality constrained convex quadratic programming, that along this path (or neighborhood) can approximate the optimal solution of the problem.)

face detection in images,...................................

matlab判别分析，基本思想是将高维的模式样本投影到最佳鉴别矢量空间，以达到抽取分类信息和压缩特征空间维数的效果，投影后保证模式样本在新的子空间有最大的类间距离和最小的类内距离，即模式在该空间中有最佳的可分离性。(matlab discriminant analysis, the basic idea is to sample the high-dimensional pattern projected onto the optimal discriminant vector space, in order to achieve the classification of information extraction and compression feature space dimension effect, the projected sample assurance model in the new subspace has the largest class room the intra-class distance and the minimum distance, i.e., have the best separability pattern in the space.)

this code useful for padding zeros in ofdm.it is the function used in ofdm_ber file.

基于自相关或四阶累计的music和esprit算法的DOA估计（一维）(Based on autocorrelation or fourth-order cumulant of music and esprit algorithm for estimating DOA (one-dimensional))

说明：  matlab例子自适应滤波最陡下降法特征值扩散度仿真，变步长仿真(Matlab example of adaptive filtering steepest descent method for eigenvalue proliferation simulation, variable step simulation)

此代码是计算两个数据之间的相关性的，直接调用Matlab里的功能函数(This code is to calculate the correlation between the two data directly call Matlab functions)