xinhaojiazao

this is a simpliest example to testing unit root

摘要：本文基于Matlab对约瑟夫森结（Josephson Junction）RCSJ模型的交直流I-V特性及非线性混沌现象进行数值模拟。通过计算机数值模拟得到该模型的非线性微分方程数值解，研究了RCSJ模型中各参量对约瑟夫森结的影响，进而简要分析其I-V特性和非线性混沌现象的产生机理，绘制出约瑟夫森结的交直流I-V特性曲线、非线性微分方程的相图及因其高度非线性而引起的通过倍周期分岔和阵发性原理进入混沌状态的分岔图。 关键词：超导器件 隧道效应 约瑟夫森结 弱耦合 倍周期分岔 庞加莱截面 混沌 (Abstract: Matlab-based Josephson junction on the (Josephson Junction) RCSJ model AC and DC IV characteristics and non-linear numerical simulation of chaotic phenomena. Through computer simulation model by the numerical solution of nonlinear differential equations to study the RCSJ model parameters on the impact of Josephson junction, and a brief analysis of the IV characteristics and the emergence of the phenomenon of non-linear chaotic mechanism, drawn Josephson junction IV characteristic curve of AC-DC, non-linear differential equations and the phase diagram because of its highly nonlinear arising through period-doubling bifurcation and chaotic state of paroxysmal principle of access to the bifurcation diagram. Key words: superconducting devices tunnel effect Josephson junction weakly coupled period-doubling bifurcation chaotic Poincare section)

计算信号累积量的程序。包括：主程序cumest.m。调用程序cum2est.m；cum3est.m；cum4est.m(Calculating the amount of signal accumulation process. Include: main cumest.m. Calling program cum2est.m cum3est.m cum4est.m)

维纳滤波器（Wiener filter）是由数学家维纳（Rorbert Wiener）提出的一种以最小平方为最优准则的线性滤波器。在一定的约束条件下，其输出与一给定函数（通常称为期望输出）的差的平方达到最小，通过数学运算最终可变为一个托布利兹方程的求解问题。维纳滤波器又被称为最小二乘滤波器或最小平方滤波器，目前是基本的滤波方法之一。(Wiener filter (Wiener filter) is caused by a mathematician Wiener (Rorbert Wiener) proposed guidelines for the minimum square optimal linear filter. Under certain constraints, which outputs a given function (often called the desired output) reaches the minimum squared differential, the final mathematical operation may become a problem solving Equation Leeds Taub. Wiener filter is also known as the least squares filter or least squares filter, currently one of the basic filtering methods.)

信道模型讲解程序(Channel model to explain the procedures)

自适应抵消与谱相减结合的单通道语音消噪算法的研究，对这方面的研究比较详细(Adaptive cancellation and spectral subtraction with the single-channel speech denoising algorithm, more detailed research in this area)

说明：  AM、FM调制解调的MATLAB源代码，能够正常运行，性能不错。(AM, FM modulation and demodulation of the MATLAB source code, to the normal operation, good performance.)

GENERAL POWER ELECTRONICS SIMULIK MODELS

this program is about pulse propagation in fiber

一种基础的恒模算法，应用于信道补偿的盲均衡(a basic algorithm for costant modulus algorithm,the blind equlization application used to channel conpasention)