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The Graphics View Coordinate System(Qt翻译)
Graphics View以笛卡尔坐标系为基础,items在scene上的位置和几何结构由x坐标和y坐标表示。当我们用未转置的view来观察scene时,scene中的一个单元由屏幕中的一个像素表示。 注:由于Graphics Views使用Qt的坐标系...
分类:其他好文   时间:2015-08-07 14:54:42    阅读次数:349
地理坐标系与投影坐标系
1、首先理解地理坐标系(Geographic coordinate system),Geographic coordinate system直译为地理坐标系统,是以经纬度为地图的存储单位的。很明显,Geographic coordinate syst em是球面坐标系统。我们要将地球上的数字化信息存放到球面坐标系统上,如何进行操作呢?地球是一个不规则的椭球,如何将数据信息以科学的方法存放到椭球上?...
分类:其他好文   时间:2015-08-06 16:51:28    阅读次数:124
[leetcode]Container With Most Water
题目:Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints ...
分类:其他好文   时间:2015-08-06 11:06:23    阅读次数:81
LeetCode(11)题解: Container With Most Water
https://leetcode.com/problems/container-with-most-water/题目:Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai...
分类:其他好文   时间:2015-08-06 01:54:09    阅读次数:140
coordinatewise 是什么意思?
As far as I remember, in the context of optimization, "coordinate wise" means that you are manipulating each coordinate independently with the only cr...
分类:其他好文   时间:2015-07-30 09:26:29    阅读次数:815
LeetCode#11 Container With Most Water
Problem Definition:Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai).n vertical lines are drawn such ...
分类:其他好文   时间:2015-07-28 22:35:53    阅读次数:111
LeetCode 11 -- Container With Most Water
Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints of ...
分类:其他好文   时间:2015-07-28 20:26:35    阅读次数:96
Submatrix Sum
Given an integer matrix, find a submatrix where the sum of numbers is zero. Your code should return the coordinate of the left-up and right-down numbe...
分类:其他好文   时间:2015-07-28 06:40:25    阅读次数:139
Codeforces Round #312 (Div. 2) A.Lala Land and Apple Trees
Amr lives in Lala Land. Lala Land is a very beautiful country that is located on a coordinate line. Lala Land is famous with its apple trees growing e...
分类:移动开发   时间:2015-07-26 00:26:11    阅读次数:245
11.Container With Most Water (Array; Two-Pointers)
Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints of ...
分类:其他好文   时间:2015-07-20 21:27:30    阅读次数:96
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