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a
说明： 决策树(Decision Tree）是在已知各种情况发生概率的基础上，通过构成决策树来求取净现值的期望值大于等于零的概率，评价项目风险，判断其可行性的决策分析方法，是直观运用概率分析的一种图解法。由于这种决策分支画成图形很像一棵树的枝干，故称决策树。在机器学习中，决策树是一个预测模型，他代表的是对象属性与对象值之间的一种映射关系。Entropy = 系统的凌乱程度，使用算法ID3, C4.5和C5.0生成树算法使用熵。这一度量是基于信息学理论中熵的概念。
决策树是一种树形结构，其中每个内部节点表示一个属性上的测试，每个分支代表一个测试输出，每个叶节点代表一种类别。
分类树（决策树）是一种十分常用的分类方法。它是一种监督学习，所谓监督学习就是给定一堆样本，每个样本都有一组属性和一个类别，这些类别是事先确定的，那么通过学习得到一个分类器，这个分类器能够对新出现的对象给出正确的分类。这样的机器学习就被称之为监督学习。(Decision tree is a decision analysis method based on the known probability of occurrence of various situations, which can calculate the probability that the expected value of net present value is greater than or equal to zero, evaluate the project risk and judge its feasibility by constructing a decision tree. It is a graphic method of intuitively using probability analysis. Because this kind of decision branch is drawn as a graph, it is very similar to the branch of a tree, so it is called decision tree. In machine learning, decision tree is a prediction model, which represents a mapping relationship between object attributes and object values. Entropy = the disorder degree of the system, using algorithms ID3, C4.5 and C5.0, spanning tree algorithm using entropy. This measure is based on the concept of entropy in information theory.)
- 2021-02-01 15:02:09下载
- 积分：1
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pulse_train
generation of a pulse train
- 2009-05-16 06:21:44下载
- 积分：1
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40!
0-40的立方，实现输入任意0-40数就可以得到数的立方值(0-40 of the cube, the number of the input an arbitrary 0-40 can get the value of the number of cubic)
- 2010-01-20 10:58:27下载
- 积分：1
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Scattering-of-Electromagnetic-Waves
MATLAB programs related to electromagnetic wave scattering with special emphasis on wave scattering by random rough surfaces and discrete random media.(Detailed descriptions of the theories and formulations behind these codes can be found in the three-volume book Scattering of Electromagnetic Waves published by John Wiley & Sons:
Volume I: Theories and Applications (2000)by L. Tsang, J.A. Kong, and K.H. Ding
Volume II: Numerical Simulations (2001) by L. Tsang, J.A. Kong, K.H. Ding, and C.O. Ao
Volume III: Advanced Topics (2001) by L. Tsang and J.A. Kong
)
- 2012-08-30 20:50:47下载
- 积分：1
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RecursiveLeastSquares
此源码程序是自适应滤波中的RLS算法的应用。在MATLAB中对其收敛速度 输出就行了仿真(This procedure is source of RLS adaptive filtering algorithm applications. In MATLAB in the convergence rate of its output on the line simulation)
- 2008-06-09 12:28:15下载
- 积分：1
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addons
图像处理的matlab代码，图像预处理的基本程序，matlab语言基础(Image processing matlab code, image pre-processing of the basic procedures, matlab Language Infrastructure)
- 2009-12-15 14:22:56下载
- 积分：1
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simulink_k_m_c
用matlab中的simulink进行弹簧质量系统的仿真，可以输出速度，位移，加速度。包括itd法模态参数识别，正交归一化振型程序。(stiffness-mass simulation by simulink in matlab.it can get velocity acce and displacement.it also includes itd method and malized orthogonal functions )
- 2012-04-05 13:27:27下载
- 积分：1
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MIMO
mimo的仿真，误码率，比特率随接收天线的变化情况(mimo simulation, error rate, the bit rate changes with the receiving antenna)
- 2014-11-27 11:33:41下载
- 积分：1
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QGA_fxy
QGA_fxy是用量子遗传算法（quantum genetic algorithm）解决二元函数寻优的问题。文件打开后运行QGA_fxy.m文件即可得到结果，代码中有详细注释，方便修改。运行示例已经保存为图片附在压缩包中。(QGA_fxy binary function is to solve optimization problems using quantum genetic algorithm (quantum genetic algorithm). Run QGA_fxy.m file to get the file to open the result, the code has detailed notes, easy to modify. Run the sample has been saved as a picture attached to the compressed package.)
- 2014-02-08 12:51:14下载
- 积分：1
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communicationcode
微波技术，还有一些通信各类代码。代码都以matlab格式进行的(Microwave technology, there are various types of communications code. Code to matlab format)
- 2009-02-03 16:20:53下载
- 积分：1
