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reference-program
2011年美国大学生数学建模二等奖获得者B题参考程序(2011 American Mathematical Modeling Award winner Problem B reference program)
- 2011-08-11 16:09:13下载
- 积分：1
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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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16-QAM
modulation and demodulation 16-QAM
- 2011-01-30 22:18:44下载
- 积分：1
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FDTD_2D_with_Mur_ABC_boundary
matlab环境下光波导的二维仿真，能简单地修改波导尺寸和介质常量(matlab simulation with fdtd mur)
- 2012-05-29 01:47:12下载
- 积分：1
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dct-algorithm-image-fusion
dct algorithm image fusion
- 2014-10-16 16:42:58下载
- 积分：1
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trans
将idNO类中序列相差2以内的子序列进行连接，用于交流留的数据处理(Conecting the subsequences which are next to others (less than 2). This is used for data processing of transpotation flow)
- 2013-10-15 19:43:56下载
- 积分：1
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PV_2012
光伏低电压穿越的模型，效果不是比较理想，是大功率的，可在其上进行低电压控制策略的改进(PV LVRT model, the effect is not ideal, high-power, low-voltage control can be improved in its strategy on)
- 2015-03-02 16:47:53下载
- 积分：1
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DSP_toolbox-for-matlab
DSP toolbox for Matlab
- 2013-12-20 06:37:45下载
- 积分：1
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DistanceTransformationByMATLAB65
在MATLAB提供的距离变换函数的基础上，对二值BMP图像进行不同距离度量的距离变换，并给出变换效果。程序已经在MATLAB6.5上运行通过。(Provided in MATLAB distance transform function based on the binary BMP images of different distance measure of distance transform, and gives the effect of transformation. Procedures have been adopted in MATLAB6.5 run.)
- 2008-01-26 00:51:32下载
- 积分：1
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msksimulink
MSK的simulink仿真程序
用于毕业设计与论文以及做课题用(MSK Simulink simulation program for the design and graduation thesis topic, and making use)
- 2007-05-29 13:37:59下载
- 积分：1
