11 2014 档案

GMM 的EM 实现
摘要：算法逻辑在这里：http://www.cnblogs.com/Azhu/p/4131733.html 贴之前先说下，本来呢是打算自己写一个的，在matlab 上，不过，实在是写不出来那么高效和健壮的，网上有很多实现的代码，例如上面参考里面的，那个代码明显有问题阿，然后因为那里面的代码与逻辑分析是一... 阅读全文
posted @ 2014-11-30 18:08 A_zhu 阅读(355) 评论(0) 推荐(0) 编辑
[LeetCode] Binary Tree Level Order Traversal II
摘要：Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root).For exa... 阅读全文
posted @ 2014-11-30 06:13 A_zhu 阅读(2041) 评论(0) 推荐(0) 编辑
[LeetCode] Longest Substring Without Repeating Characters最长无重复子串
摘要：Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters fo... 阅读全文
posted @ 2014-11-30 05:20 A_zhu 阅读(773) 评论(0) 推荐(0) 编辑
又看了一次EM 算法，还有高斯混合模型，最大似然估计
摘要：先列明材料：高斯混合模型的推导计算（英文版）：http://www.seanborman.com/publications/EM_algorithm.pdf这位翻译写成中文版：http://www.cnblogs.com/jerrylead/archive/2011/04/06/2006936.ht... 阅读全文
posted @ 2014-11-29 19:12 A_zhu 阅读(3892) 评论(0) 推荐(0) 编辑
[LeetCode] Sort Colors 只有3个类型的排序
摘要：Given an array withnobjects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, wh... 阅读全文
posted @ 2014-11-28 20:40 A_zhu 阅读(489) 评论(0) 推荐(0) 编辑
[LeetCode] Text Justification words显示的排序控制
摘要：Given an array of words and a lengthL, format the text such that each line has exactlyLcharacters and is fully (left and right) justified.You should p... 阅读全文
posted @ 2014-11-28 15:48 A_zhu 阅读(245) 评论(0) 推荐(0) 编辑
[LeetCode] Rotate Image n-by-n矩阵顺时针旋转
摘要：You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?Hide TagsArray 一题严... 阅读全文
posted @ 2014-11-28 13:56 A_zhu 阅读(285) 评论(0) 推荐(0) 编辑
[LeetCode] Edit Distance 字符串变换为另一字符串动态规划
摘要：Given two wordsword1andword2, find the minimum number of steps required to convertword1toword2. (each operation is counted as 1 step.)You have the fol... 阅读全文
posted @ 2014-11-28 12:38 A_zhu 阅读(520) 评论(0) 推荐(0) 编辑
[LeetCode] Jump Game 数组控制
摘要：Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximu... 阅读全文
posted @ 2014-11-28 05:47 A_zhu 阅读(177) 评论(0) 推荐(0) 编辑
[LeetCode] Minimum Window Substring 散列映射问题
摘要：题目：Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n).For example,S="ADOBECOD... 阅读全文
posted @ 2014-11-28 05:13 A_zhu 阅读(2800) 评论(1) 推荐(0) 编辑
excel 表格lookup 的操作
摘要：这个实现语句如下，（写在2行然后向下拖动）（2007或以上版本）： 1 = 2 IF(OR($D20,ISBLANK($H2),$G2="111"), 3 "", 4 IF(OR($G2="222",$G2="333"), 5 IF($H2>0,1,-1)*SUMIFS(INDIRECT("... 阅读全文
posted @ 2014-11-25 01:32 A_zhu 阅读(1875) 评论(0) 推荐(0) 编辑