impsnr

城市交通流的运行存在着高度的复杂性、时变性和随机性,实时准确的交通流预测是智能交通系统,特别是先进的交通管理系统与先进的出行者信息系统研究的关键. 基于交通流预测的特点,给出了基于遗传算法的小波神经 网络的交通预测模型GA-WNN ,用具有自然进化规律的遗传算法来对小波神经网络的连接权值和伸缩平移尺度进行前期优化训练,部分代替了小波框架神经网络中按单一梯度方向进行参数优化的梯度下降法,克服了单一梯度下降法易陷入局部极小和引起振荡效应等缺陷. 仿真实验验证了GA-WNN 预测模型对短时交通流的预测的有效性.(For the high complexity ,time-variation and probability of urban traffic flow , its real-time and exact prediction is critical to the research of intelligent traffic systems , especially for the advanced traffic manage-ment system and advanced traveler information system. Based on the character of the traffic flow prediction , a GA-WNN model is given based on the wavelet neural network with genetic algorithm. The genetic algorithm of natural evolving law for the gradient descendent algorithm in Wavelet Neural Network is partly substituted to pre-optimize the connection weight and the extension scale of the wavelet neural network and later optimize the parameters along a single gradient vector. This method overcomes some drawbacks when there exists a single gradient descendent algorithm , such as local minimum and oscillation. A short-time traffic flow prediction sim- ulation using the GA2WNN prediction model demonstrates the validity of the model .)

Chirp Scaling Algoritm

使用MATLAB对通信中的一种调制技术QPSK进行编程实现，分析其误码率(The use of MATLAB for communication in a QPSK modulation technique to program implementation, analysis of its error rate)

使用matlab的仿真平台simulink来实现直接序列扩频码变换为双极性码的转换 (Matlab simulation using simulink platform to achieve the direct sequence spread spectrum code transformation for bipolar code conversion)

DIRK3 algorithm, the algorithm to be implenmented is the optimal two stage third order accurate Diagnonally Implicit Runge-Kutta method, written DIRD3, for the ODE prolem and diffrentiate equations.

NuMicro NUC100 Series Driver Reference Guide

Photovoltaic (PV) or solar energy is expected to be one of the most important

学习MATLAB的书籍，包括官方学习手册，MATLAB编程风格指南，编程实例，基础教材等！(Learning MATLAB books, including official study manual, MATLAB programming style guide, programming examples, basic teaching materials, etc.!)

用matlab实现去趋势互相关分析的DCCA算法，将两组数据分析其协方差，最后得到DCCA指数，并进行T检验(DCCA algorithm using matlab detrended cross-correlation analysis, two sets of data to analyze the covariance last DCCA index, and T-test)

matlab实现振动信号试验模态参数时域识别：STD法和复指数法 (matlan achieve vibration signals in time domain experimental modal parameters identification: STD modal parameter identification method and the complex exponential law modal parameter identification)