newton-raphson

Allan方差的源代码，可计算Allan方差(Allan variance)

3机9节点系统暂态稳定计算程序，matlab程序实现(3 machine 9 bus system transient stability program)

I have uploaded a code for DCT watermarking..I have embed a basic matrix into original image and calculated the difference.

1. 基于simulink搭建一个QPSK发送链路，QPSK调制信号经过了瑞利衰落信道，观察信号经过衰落前后的星座图，观察信道特性。仿真参数：信源比特速率为500kbps，多径相对时延为[0 4e-06 8e-06 1.2e-05]秒，相对平均功率为[0 -3 -6 -9]dB，最大多普勒频移为200Hz。(1. Based on simulink structures, QPSK sent a link, the Rayleigh fading channel after the QPSK modulation signal, were observed before and after signal after the decline of constellation diagram, observation channel characteristic. Simulation parameters: the source is 500 KBPS bit rate, relative multipath time delay of [0 8 e 4 e- 06-06 e-05] 1.2 seconds, the relative average power is [0-3-6-9] dB, most of the doppler frequency shift is 200 hz.)

自相关检测方法是利用信号和噪声在相关域上的差别来构造检测器的。自相关检测是将信号与自身延迟一个时延后的信号作相关处理，或用双通道接收机的输出进行相关，得到扩频信号的自相关函数(Auto-correlation detection method is the use of signal and noise in the relevant field to construct the difference detector. Autocorrelation test is a time delay signal and its delayed signal for correlation, or the output of dual-channel receiver, associated, are spread spectrum signal autocorrelation function)

此算法实现了对多径信号的估计及优化，仿真效果很好(muitipath option)

this file is for island detection of DG. after islandig of grid DG provide it s local load and is stable. ref for this simulation: Islanding Detection and Control of Islanded Single and Two-Parallel Distributed Generation Units by Behrooz Bahrani

MATLAB中求解非线性系统平衡点的方程，对分析其动力学稳定性大有裨益(MATLAB to solve the nonlinear system equilibrium point of the equation, the analysis of its dynamic stability of great benefit)

Introduction to matlab at MIT 麻省理工大学的matlab基本教程(Introduction to matlab at MIT Massachusetts Institute of Technology University of basic tutorial matlab)

matlab 动画汇总，包括 弹性蹦球演示程序。嫦娥奔月演示程序。曲柄连杆机构充气球动画演示程序等(matlab animation summary, including flexible spring ball demo. Moon demo. Crank animation process inflatable ball, etc.)