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Power flow studies, commonly known as load flow, form an important part of power system analysis. They are necessary for planning, economic scheduling and control of an existing system as well as planning its future expansion. The problem consists of determining the magnitudes and phase angle of voltages at each bus and active and reactive power flow in each line. In solving power flow problem, the system is assumed to be operating under balanced conditions and a single-phase model is used. Four quantities are assumed at each bus. These are voltage magnitude v, phase angle  , real power P, and reactive power Q.The Newton Raphson method of load flow analysis is an iterative method which approximates the set of non-linear simultaneous equations to a set of linear simultaneous equations using Taylor’s series expansion and the terms are limited to first order approximation.

matlab程序提取语音信号的基音频率、共振峰、能量、MFCC等特征参数。(The matlab program to extract the speech signal fundamental frequency, Gong Zhenfeng, energy, MFCC and other characteristic parameters.)

affine transform image scrambling

本程序实现SINS捷联解算，提供给惯性期间信息即可得到导航参数(The program SINS Jie associated solver, information provided to the inertia during navigation parameters can be obtained)

Zhang wavelet neural network. Do the first wavelet network made by Dr. Zhang.

对脑电时域信号提取30Hz以内各个节律波能量比重(Extracting energy proportion of each rhythm within 30Hz for EEG time-domain signal)

对心电信号进行处理，R波定位，特征点提取(ECG signal processing, R wave positioning, feature point extraction)

说明：  这组程序是基于小波变换的信号奇异性检测和去噪的例程，每个程序的具体功能见程序源码。(this group are based on the wavelet transform singularity detection signal denoising and the routines, Every procedure specific functions to see source codes.)

说明：  标准粒子群优化算法的示例，程序主体附带大量讲解，简明扼要，适合初学者对粒子群算法结构进行研究(Standard particle swarm optimization example, the program attached to a large number of the main explanations, concise and suitable for beginners on the particle swarm algorithm to study the structure of)

计算机仿真程序例子，包含多个基本程序，可帮助我们更好的学习matlab(examples of computer simulation program, includes a number of basic procedures that will help us to better learning Matlab)