calendar

finite difference method有限差分法求波导的TM模式(finite difference method finite difference method for the TM waveguide mode)

抛物型方程的加权隐式差分格式程序，通过该程序读者可以不同选择 加权因子 THETE 可以得到四种不同的差分格式。(Parabolic equations weighted implicit difference scheme program, through the program readers the different options the weighting factor THETE can get four different differential format.)

it is a collection of matlab program. 1.to find the euclidian distance 2.to create mel frequency filter bank 3.

将含有高斯白噪声的输入信号通过线性系统后（带阻滤波器）的输入、输出前信号的频谱、功率谱对比。同时给出了线性系统特性(Gaussian white noise, containing the input signal by a linear system (bandstop filter) of the input, before the output signal spectrum, the power spectrum of contrast. Also gives a linear system characteristics)

The NCT includes 4 External validity indices and 8 internal validity indices, and the sub-routine validity_Index.m is designed to use them. This tool is suitable for the research work such as the performance comparison of different indices on estimation of the number of clusters, algorithm design by improving part codes of this toolbox. i) External validity indices when true class labels are known: Rand index Adjusted Rand index Mirkin index Hubert index ii) Internal validity indices when true class labels are unknown: Silhouette Davies-Bouldin Calinski-Harabasz Krzanowski-Lai Hartigan weighted inter- to intra-cluster ratio Homogeneity Separation iii) Others Error rate (compared with true labels) System Evolution: it is used to estimate the number of clusters and give separable degrees between clusters.

本文利用软件相移技术得到相互正交的参考正弦波信号；通过互相关算法，完成了软正交矢量型LIA相关器的具体实现；利用该方法实现了对微弱信号幅值和相位的检测，有效地抑制干扰，减少了硬件电路成本。通过Matlab仿真，验证了该算法具有一定的优越性。(In this paper, the software technology is orthogonal to the phase shift of the reference sine wave signal through cross-correlation algorithm to complete the implementation of soft orthogonal vector LIA correlator achieved using this method for detecting a weak signal amplitude and phase, effectively suppress the interference and reduce the cost of the hardware circuit. By Matlab simulation show that the algorithm has certain advantages.)

for linear induction motor drive using model predictive control

定时恢复在接收机中是必不可少的环节，只有定时恢复环节性能良好才能正确解调出信号。 位同步-gardner算法(Timing recovery is an essential part of the receiver, and the signal is demodulated correctly only when the timing recovery is in good performance.)

sift的matlab代码，是最新的,效果不错，其中有很多详细说明，可以试试。(sift the matlab code, is the latest, well, there are a lot of detail, you can try.)

叶素动量理论，可以求得功率、转矩、风能利用系数他们与叶尖速比、扭角、弦长的关系(Blade element momentum theory, it can obtain power, torque, power coefficient and tip speed ratio them, twist angle, chord length relationship)