chapter7

介绍了 Cohen类双线性时频分布并针对交叉干扰项影响无法完全消除的问题进行了重排时频变换以提取及分辨 含有白噪声和窄带周期干扰的局部放电信号。处理仿真和现场检测到的局部放电超声信号时根据白噪声和窄带 周期干扰信号在时域上的平稳性特性发现重排 Cohen类时频变换方法不仅可以很好地将局放信号和背景噪声以 及窄带周期干扰信号分辨开来,而且大大减弱并抑制了交叉干扰项的影响,保持了更高的时频分辨率和时频聚集 性,从而验证了重排 Cohen类时频变换方法的有效性。 (In order to express the partial discharge ( PD) information of gas insulated switchgear ( GIS) in time-frequency domain, weintroduced theCohen? s class bilinear time-frequency distribution and its reassigned time-frequency transform method to pick up and distinguish theultrasonic signals in field from the whitenoises and narrow band periodic interference signals using the acousticemission ( AE) technology. After the processing of the simulated and PD ultrasonic signals in field, and according to the stationary feature of white noises and narrow band interference signals, wedraw a conclusion that the reassigned time-frequency distribution method can not only distinguish thePD signal from back ground noises and narrow band interference signals, but also decrease and restrain the influenceof cross-items, and acquire better time )

使用simulink仿真，实现潮流计算。。。非常详细，可以对学习潮流计算和simulink的提供帮助。 (Use simulink simulation, realization flow calculation. ʱ ?? ʱ ?? Very detailed, can help to study the trend of computing and simulink.)

用于信号特征提取、信号消噪，快速扩展随机生成树算法，最小二乘回归分析算法，包括广义互相关函数GCC时延估计，信号处理中的旋转不变子空间法，包括最小二乘法、SVM、神经网络、1_k近邻法,包含特征值与特征向量的提取、训练样本以及最后的识别，针对EMD方法的不足。( For feature extraction, signal de-noising, Rapid expansion of random spanning tree algorithm, Least-squares regression analysis algorithm, Including the generalized cross-correlation function GCC time delay estimation, Signal Processing ESPRIT method, Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, For lack of EMD.)

按功能分类介绍了matlab中主要函数的使用，很方便。(Functional classification, introduced by the main function matlab use, very convenient.)

this is a matlab SVM example

matlab 用于数据拟合的几个教程：包括一元线性回归分析 一元非线性回归分析多重回归分析(matlab for data fitting several tutorials include: one yuan linear regression analysis one yuan non-linear regression analysis of multiple regression analysis)

一直用途比较大的调制方式，高斯最小移频键控，在simulink中有比较大的参考价值(Has been the use of relatively large modulation, Gaussian Minimum Shift Keying reference value in simulink)

快速主分量分析方法，是经典的盲信号处理方法。可参考用(Fast principal component analysis method, is a classic blind signal processing methods. May reference)

matlab 中的一些很用的 基本代码。数值分析于应用一书里面的例子。(Matlab numerical analysis in the application of some very basic code.)

用matlab编写的一段感知器神经网络代码，挺好用的(Prepared using matlab a perceptron neural network code, very good use)