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paper：《肿瘤基因表达谱分类特征基因选取问题及分析方法研究》 1.肿瘤基因表达谱 数据的一个显著特点是样本维数过高,每个样本都记录了组织细胞中所有可测基因的表达水平,但实际上只有少数基因才真正同样本类别相关,包含了样本分类信息,这些基因被称为分类特征基因. 2.肿瘤基因表达谱是指利用DNA芯片所 阅读全文
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转自：https://www.jianshu.com/p/43318a3dc715?from=timeline&isappinstalled=0 https://blog.csdn.net/ericcchen/article/details/72357411 实际含义包括数据和假设的概率模型之间的差 阅读全文
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Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to out 阅读全文
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Given any string of N (≥5) characters, you are asked to form the characters into the shape of U. For example, helloworld can be printed as: h d e l l 阅读全文
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A clique is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are adjacent. A maximal clique is a clique 阅读全文
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转自：https://www.cnblogs.com/wyuzl/p/7699818.html 1.在决策树算法中，就是根据信息论的方法找到最合适的特征来划分数据集。在这里，我们首先要计算所有类别的所有可能值的香农熵，根据香农熵来我们按照取最大信息增益（information gain）的方法划分我 阅读全文
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转自:https://www.cnblogs.com/ohshit/p/5629581.html （1）条件概率公式 设A,B是两个事件，且P(B)>0,则在事件B发生的条件下，事件A发生的条件概率（conditional probability)为： P(A|B)=P(AB)/P(B) （2）乘法 阅读全文
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1100 Mars Numbers （20 分） People on Mars count their numbers with base 13: Zero on Earth is called "tret" on Mars. The numbers 1 to 12 on Earch is call 阅读全文
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The ranklist of PAT is generated from the status list, which shows the scores of the submissions. This time you are supposed to generate the ranklist 阅读全文
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Given a list of N student records with name, ID and grade. You are supposed to sort the records with respect to the grade in non-increasing order, and 阅读全文