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numerical_analysis_homework
(有源代码)数值分析作业,本文主要包括两个部分,第一部分是常微分方程(ODE)的三个实验题,第二部分是有关的拓展讨论,包括高阶常微分的求解和边值问题的求解(BVP).文中的算法和算例都是基于Matlab计算的.ODE问题从刚性(STIFFNESS)来看分为非刚性的问题和刚性的问题,刚性问题(如大系数的VDP方程)用通常的方法如ODE45来求解,效率会很低,用ODE15S等,则效率会高多了.而通常的非刚性问题,用ODE45来求解会有很好的效果.从阶次来看可以分为高阶微分方程和一阶常微分方程,高阶的微分方程一般可以化为状态空间(STATE SPACE)的低阶微分方程来求解.从微分方程的性态看来,主要是微分方程式一阶导系数大的时候,步长应该选得响应的小些.或者如果问题的性态不是太好估计的话,用较小的步长是比较好的,此外的话Adams多步法在小步长的时候效率比R-K(RUNGE-KUTTA)方法要好些,而精度也高些,但是稳定区间要小些.从初值和边值来看,也是显著的不同的.此外对于非线性常微分方程还有打靶法,胞映射方法等.而对于微分方程稳定性的研究,则诸如相平面图等也是不可缺少的工具.值得提出的是,除了用ode系类函数外,用simulink等等模块图来求解微分方程也是一种非常不错的方法,甚至是更有优势的方法(在应用的角度来说).((Source code) numerical analysis homework, this docment includes two parts, the first is ordinary differential equations (ODE) of the three examples, the second part is about the expansion of the discussion, including the higher-order ordinary differential & boundary value solution Problems (BVP). the text of the algorithm and numerical examples are based on the Matlab. ODE from the rigid (STIFFNESS) look into the issue of non-rigid and rigid problem, rigid problems (such as large coefficient VDP equation) such as using the always method ODE45 used to solve the problems , efficiency will be low, with ODE15S the other hand, many of the high efficiency. and the usual problem of non-rigid, there will be used to solve ODE45 very good results. Judging from the order can be for high-order differential equations and first-order ordinary differential equations, higher-order differential equations can be transformed into a general state space (STATE SPACE) used to solve the low-order different)
- 2009-03-16 09:06:09下载
- 积分：1
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Matcom_code
实现VC与MATLAB的无缝对接，让您能轻松的将matlab程序移植到VC平台，并能脱离matlab平台运行，程序中使用了matcom进行编程，并有详细的调试说明。绝对值得下载哦。。。(VC and MATLAB to achieve a seamless connection, so you can easily migrate to matlab program VC platform and can run from the matlab platform, procedures matcom used to program and debug a detailed description. Oh, definitely worth downloading. . .)
- 2009-05-24 10:06:02下载
- 积分：1
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matlab7.0one
说明： 主要介绍MATLAB7.0的工作环境、数组、矩阵、数值计算、M文件、图形用户界面设计、编译、接口及二维、三维图形绘制功能(MATLAB7.0 mainly working environment, array, matrix, numerical calculation, M files, graphical user interface design, compiler, interfaces and two-dimensional, three-dimensional graphics rendering capabilities)
- 2008-11-01 12:00:01下载
- 积分：1
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syszlmx
交通分布 双约束重力模型 matlab程序(A matlab program of Dual-constrained Gravity Model in traffic distribution.)
- 2013-01-04 14:58:56下载
- 积分：1
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matlabtuxiangchulidaima
P0301：数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
P0307：采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
P0308：图像的自适应魏纳滤波
P0309：运用5种不同的梯度增强法进行图像锐化
P0310：图像的高通滤波和掩模处理
P0311：利用巴特沃斯（Butterworth）低通滤波器对受噪声干扰的图像进行平滑处理
P0312：利用巴特沃斯（Butterworth）高通滤波器对图像进行锐化处理(P0301 : digital image data matrix display and Fourier Transform P0302 : Two-dimensional discrete cosine transform image compression P0303 : Gray used a new method to enhance the contrast of the image P0304 : histogram equalization P0305 : Simulation images by white Gaussian noise and Impulse noise impact P0306 : 2D median filtering function medfilt2 right by the Salt and Pepper image noise filtering P0307 : MATLAB filter2 the function of noise interference by the image filtering P0308 : Image Adaptive Filter Weiner P0309 : use five different gradient Enhancement Act for image sharpening P0310 : Images of the high-pass filtering and mask handling P0311 : use Butterworth (Butterworth) low-pass filter to noise interference by the image smoothing P 0312 : Butterworth (Butterworth) high-pass fi)
- 2006-11-30 13:28:17下载
- 积分：1
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takikofz
自己写的,有关于在电脑上仿真手机图片的显示效果,希望有所帮助(wrote it myself, on the phone computer simulation results show the pictures, hoping some help)
- 2007-04-08 18:35:38下载
- 积分：1
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k-meansaSOFM
已知一组二维模式矢量如下（20个）,利用k均值聚类算法将模式集分类，并计算出聚类中心。利用输入层为2个神经元，输出层结构为7*7方阵的自组织映射（SOFM）对同样模式进行聚类(Given a set of two-dimensional pattern vector as follows (20), the use of k-means clustering algorithm to classify the pattern set, and calculate the cluster center. Using the input layer 2 neurons, the output layer structure for self-organizing map 7* 7 phalanx (SOFM) for the same model clustering)
- 2015-03-26 19:18:43下载
- 积分：1
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dae2
用matlab作的，代数微分方程组的解法。(Matlab for use, and the solution of algebraic differential equations.)
- 2008-01-03 13:33:10下载
- 积分：1
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Matrix-convolution
矩阵卷积,matlab代码，希望能帮助那些需要进行运算的同学。。。(Matrix convolution)
- 2012-04-19 22:50:34下载
- 积分：1
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case28-gray-network
MATLAB神经网络30个案例分析—案例28 灰色神经网络的预测算法—订单需求预测源代码及数据(MATLAB Neural Network 30 Case Studies- Case of 28 gray neural network prediction algorithm- order demand forecast source code and data)
- 2012-04-28 23:00:16下载
- 积分：1
