covmatrix

说明：  对于初学者是个很好的入手资料 学会如何写程序(For beginners a good start with information to learn how to write procedures)

波束形成，多信号的信号谱估计，基于线性约束最小方差准则(Beamforming, signal spectrum multiple signal estimates based linearly constrained minimum variance criterion)

提取振动信号中峭度等特征参数，并运用K均值聚类进行聚类分析(Extract vibration signal characteristic parameters such as kurtosis, and the use of K-means clustering clustering analysis)

三相DC-AC逆变器的谐波注入SPWM调制技术 性能指标：直流输入350~640V，三相交流输出线电压220V AC，输出功率5kVA，功率因数0.8，输出频率50Hz。(Harmonic Injection SPWM Modulation Technology for Three-phase DC-AC Inverter Performance indicators: DC input 350 ~ 640V, three-phase AC output line voltage 220V AC, output power 5KA, power factor 0.8, output frequency 50Hz.)

说明：  1.用差分法求解电容器x轴上的电位分布和原点O点的电位值。（不考虑电容的电磁效应） 2.通过MATLAB仿真实现八木天线的工作原理，获得八木天线的输入阻抗、天线增益、E面方向图和H面方向图。(1.The difference method is used to solve the potential distribution on the x-axis of the capacitor and the potential value at the point O. (without considering the electromagnetic effect of capacitors) 2.The working principle of Yagi antenna is simulated by MATLAB. The input impedance, antenna gain, E-plane pattern and H-plane pattern of Yagi antenna are obtained.)

ldpc codes codec procedures, very good for learning ldpc.

Semi-Supervised Discriminant Analysis (Manifold Regularization Way)

POWELL算法求最小值，可求取多个函数的最小值，速度和精度都很高。(POWELL algorithms seek the minimum, the minimum can be to strike a number of functions, speed and accuracy are high.)

matlab 对信号处理的精讲，且概括全面 (matlab Signal Processing Collection )

考虑一长度为D，宽度为L的理想均匀面阵天线，并用Matlab画出其二维波束方向图。(Consider an ideal uniform planar array antenna with length D and width L, and draw its two-dimensional beam pattern with MATLAB.)