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Logistic Regression
1.model specificationbinomial logistic regression model是一种分类模型。条件概率分布为: 伯努利分布其中, 2.Maximum Likelihood Estimation由于Hessian矩阵正定,因此NLL是个凸函数,有全局最小值。可以使用梯度...
分类:其他好文   时间:2014-07-26 14:11:14    阅读次数:196
HDU - 3530 Subsequence
Description There is a sequence of integers. Your task is to find the longest subsequence that satisfies the following condition: the difference between the maximum element and the minimum element ...
分类:其他好文   时间:2014-07-25 11:06:41    阅读次数:242
【LeetCode】【Python题解】Best Time to Buy and Sell Stock II
Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete as many transactions as you like (ie, buy on...
分类:编程语言   时间:2014-07-24 10:25:36    阅读次数:227
URAL 1146 Maximum Sum(最大子矩阵的和 DP)
Maximum Sum大意:给你一个n*n的矩阵,求最大的子矩阵的和是多少。思路:最开始我想的是预处理矩阵,遍历子矩阵的端点,发现复杂度是O(n^4),就不知道该怎么办了。问了一下,是压缩矩阵,转换成最大字段和的问题。压缩行或者列都是可以的。 1 int n, m, x, y, T, t; 2 in...
分类:其他好文   时间:2014-07-24 07:10:58    阅读次数:211
URAL 1146 Maximum Sum(最大子矩阵的和 DP)
Maximum Sum 大意:给你一个n*n的矩阵,求最大的子矩阵的和是多少。 思路:最开始我想的是预处理矩阵,遍历子矩阵的端点,发现复杂度是O(n^4),就不知道该怎么办了。问了一下,是压缩矩阵,转换成最大字段和的问题。 压缩行或者列都是可以的。 int n, m, x, y, T, t; int Map[1010][1010]; int m...
分类:其他好文   时间:2014-07-23 20:54:55    阅读次数:324
LeetCode OJ平台上Maximum Subarray题目O(n)复杂度解决方式
原始题目例如以下,意为寻找数组和最大的子串,返回这个最大和就可以。Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, ...
分类:其他好文   时间:2014-07-23 15:45:59    阅读次数:246
Leet code —Jump Game
问题描述: 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 maximum jump length at that position. Determin...
分类:其他好文   时间:2014-07-23 00:04:37    阅读次数:216
poj 3693 Maximum repetition substring(有点麻烦的后缀数组)
Maximum repetition substring Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6638   Accepted: 2007 Description The repetition number of a string is defined a...
分类:其他好文   时间:2014-07-21 11:35:34    阅读次数:244
LeetCode "Maximum Subarray"
Very classic problem. You can brush up your DP and Searching skills.DP:class Solution {public: int maxSubArray(int A[], int n) { // dp[i + 1...
分类:其他好文   时间:2014-07-21 11:06:21    阅读次数:216
LeetCode:Maximum Depth of Binary Tree
Given a binary tree, find its maximum depth.The maximum depth is the number of nodes along the longest path from the root node down to the farthest le...
分类:其他好文   时间:2014-07-21 09:07:24    阅读次数:207
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