levinsonf

source code for WSN protocols in matlab

To find the contrast of an image locally.

Using Graphic in MatLab part 01

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 .)

仿照着《小波去噪中软硬阈值的一种改良折衷法》一文写的程序，对比了软、硬以及软硬阈值折衷法的信噪比及均方根误差。仿真出来之后，原信号的信噪比是负的，不知道为什么？均方根误差的值也比较大，不知何解？信噪比和均方根误差是参照《基于matlab的小波去噪仿真》：吴伟，《信息与电子工程》 一文写的(Modeled on the written procedures of the hard and soft threshold wavelet de-noising an improved compromise " , compared to the soft and hard compromise between the hard and soft threshold signal-to-noise ratio and root mean square error. Out of the simulation, the signal-to-noise ratio of the original signal is negative, do not know why? The value of the root mean square error is relatively large, do not know why? Signal-to-noise ratio and root mean square error with reference to the wavelet denoising matlab-based simulation: Wu Wei, " Information and Electronic Engineering" written)

拉普拉斯金字塔变换的融合算法，对于灰度图像可用(lap_)

说明：  加窗信号经过ofdm系统的调制和解调的matlab仿真程序(Window signal through ofdm system modulation and demodulation matlab simulation program)

该代码是用C++编写的遗传算法,可在C++或 matlab环境下都可运行.(The code is C++ Prepared by genetic algorithm, can be C++ Or can be run under matlab environment.)

LTE整个物理层仿真，有200多个子程序，是MATLAB和C++混合编程(LTE physical layer simulation)

说明：  作业车间调度问题(JSP)简单来说就是设备资源优化配置问题。作业车间调度问题 是计算机集成制造系统(CIMS)工程中的一个重要组成部分,它对企业的生产管理和控制 系统有着重要的影响。在当今的竞争环境下,如何利用计算机技术实现生产调度计划优 化，快速调整资源配置，统筹安排生产进度，提高设备利用率已成为许多加工企业面临 的重大课题.近年来遗传算法得到了很大的发展，应用遗传算法来解决车间调度问题早 有研究。(Job shop scheduling problem (JSP) is simply the problem of optimal allocation of equipment resources. Job shop scheduling problem It has become a challenge for many processing enterprises to adjust resource allocation, arrange production schedule as a whole and improve equipment utilization It is an important subject for us to study. In recent years, genetic algorithm has been greatly developed. It is very early to apply genetic algorithm to solve job shop scheduling problem)