spectrum

利用有限元分析，模拟汽缸中声波的传播，这是一个多物理场问题(Finite element analysis, wave propagation simulation in the cylinder, which is a multi-physics problems)

基于RGB的图像检索源代码，可选择不同的RGB比例，搜索不同的类搜图像。(RGB-based image retrieval)

Elman神经网络：Elman网络是 J. L. Elman于1990年首先针对语音处理问题而提出来的, 它是一种典型的局部回归网络( global feed for ward l ocal recurrent)。Elman网络可以看作是一个具有局部记忆单元和局部反馈连接的前向神经网络。Elman网络具有与多层前向网络相似的多层结构。它的主要结构是前馈连接, 包括输入层、 隐含层、 输出层, 其连接权可以进行学习修正 反馈连接由一组“结构 ” 单元构成,用来记忆前一时刻的输出值, 其连接权值是固定的。在这种网络中, 除了普通的隐含层外, 还有一个特别的隐含层,称为关联层 (或联系单元层 ) 该层从隐含层接收反馈信号, 每一个隐含层节点都有一个与之对应的关联层节点连接。关联层的作用是通过联接记忆将上一个时刻的隐层状态连同当前时刻的网络输入一起作为隐层的输入, 相当于状态反馈。隐层的传递函数仍为某种非线性函数, 一般为 Sigmoid函数, 输出层为线性函数, 关联层也为线性函数。(Elman neural network: Elman JL Elman network is first proposed for speech processing problems in 1990. It is a typical local regression network (global feed for ward l ocal recurrent). Elman network can be seen as having a forward neural network of local memory unit and local feedback connections. Elman network has a multi-layer multilayer structure similar to the network. Its main structure is a feedforward connection, comprising an input layer, a hidden layer and output layer, which can be connected right learning correction feedback connected by a set of " structural" units, the output value of the memory for the previous time, which connection weights are fixed. In such a network, in addition to ordinary hidden layer, there is a special hidden layer, called an associative layer (or contact layer unit) this layer receives feedback signals the hidden layer, each hidden layer node has an associated layer node corresponding connection. The role of the associated layer is fo)

采用wiener_HOLF方法实现的维纳滤波的过程，对加噪图形采用维纳滤波(wiener_holf method)

在MATLAB环境下，对旅行商（TSP）问题的研究与设计源代码(In the MATLAB environment, the traveling salesman (TSP) problem of the source code and design )

matlab绘图方面的很好的幻灯片，内容比较实用，有兴趣的可以看看。(matlab mapping good slides, the content more practical, interested can look at.)

可以实现直角坐标系下的牛顿拉夫逊算法，适合于潮流计算(Cartesian coordinate system can achieve the Newton Raphson method, suitable for power flow calculation)

DOA估计中的基本music算法，用于多个信号来向及干扰时测向。(The basic music DOA estimation algorithm for multiple signal direction finding to and interference.)

edp文件里用到的封装函数，enfram函数。要想使用edp，需要下载此函数。(edp file used the package function, enfram, function. To use the edp will need to download this function.)

的二维时域有限差分法仿 作者：厄恩斯特汉堡，十月1999。 cem833课程，大学的图片。( 2D FDTD simulater Author: Ernst Burger, October 1999. CEM833 course, Univ. Stellenbosch.)