opimize-code

reliefF源码 用法及说明 简单易懂的(reliefF source usage, and easy to understand instructions)

详细画出了时域和频域的相关图，音频信号通过LM386放大，用于建立主成分分析模型。( Correlation diagram shown in detail the time domain and frequency domain, LM386 audio signal amplification, Principal component analysis model for establishing.)

说明：  就算hu矩中7个不变量代码。用于提取图像的不变形特征。(Even if hu 7 invariant moments in the code.)

Script used in the Japanese webinar for image processing and computer vision held on Mar. 01, 2013

优秀论文及配套源码。Hilbert-Huang变换(HHT)是一种新的非平稳信号处理技术，该方法由经验模态 分解(EMD)与Hilbert谱分析两部分组成。任意的非平稳信号首先经过EMD方法处理后被分解为一系列具有不同特征尺度的数据序列，每一个序列称为一个固有模态函数(IMF)，然后对每个IMF分量进行Hilbert谱分析得到相应分量的Hilbert谱，汇总所有Hilbert谱就得到了原信号的谱图。该方法从本质上讲是对非平稳信号进行平稳化处理，将信号中真实存在的不同尺度波动或趋势逐级分解出来，最终用瞬时频率和能量来表征原信号的频率含量。 本文研究了基于HHT的暂态电能质量扰动检测方法，介绍了HHT的基本原理和利用HHT检测电能质量多扰动信号的实现方法。仿真试验表明该方法可以实时检测扰动的起止时刻，持续时间和扰动幅度，适用于电能质量多扰动的监测和辨识系统。 (Hilbert-Huang Transform(HHT) is a new non-stationary signal processing technology，including the Empirical Mode Decomposition(EMD) and Hilbert spectral analysis．In this method，arbitrary non-stationary signals was divided into a series data sequence with different characteristic scales after the first EMD treatment，each sequence is called an intrinsic mode function(IMF)，and then each IMF component gained corresponding the Hilbert spectrum though Hilbert spectrum analysis，a summary of all Hilbert spectrum assembled to the spectra of the original signal．In essence，this method is a stable processing for non-stationary signal，which decomposed the different fluctuations or trends in the signal in rum，and represented the frequency content of the original signal using the final instantaneous frequency and energy． This paper study a method to detect power quality disturbances based on the HHT，in which the principle and the realization of the HHT and the realization of power quality disturbance)

MATLAB,用距量法分析计算带状线的特性阻抗(MATLAB, from the method of calculation of the stripline characteristic impedance)

基于lcL滤波器的三电平有源电力滤波器（APF）的仿真设计，包括（谐波检测， 电流跟踪环节）（SPWM调制） 离散域(Based on the three-level lcL filter active power filter (APF) simulation design, including (harmonic detection, current tracking link) (SPWM modulation) discrete domains)

有限元模型的建立，这些程序构成了有限元模型，用PlaneFrameModel来指定(PlaneFrameModel)

说明：  在matlab中实现时间抽取基2 FFT算法(Matlab achieve in the time taken from the base 2 FFT algorithm)

Matlab Models for PHY Design