[toc] Maximum Flows Minimum Cost Flows task 欲构造data center的traffic变换仿真,输入为二维矩阵,根据论文中的算法给定一些限定条件,求解得到新的拓扑结构。 单纯算Minimum Cost Flows的Demo 与 maximum flows ...
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Web程序 时间:
2019-08-25 16:32:13
阅读次数:
182
1.窗口函数
1.LAG(col,n,DEFAULT) 用于统计窗口内往上第n行值
2.LEAD(col,n,DEFAULT) 用于统计窗口内往下第n行值
3.FIRST_VALUE(col,false) 用于统计窗口内截止到当前行,第一个出现的值
4.LAST_VALUE(col,fals... ...
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其他好文 时间:
2019-08-22 01:04:19
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74
https://aws.amazon.com/cn/iam/faqs/ IAM授权 Policies and Permissions https://docs.aws.amazon.com/zh_cn/IAM/latest/UserGuide/access_policies.html ...
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其他好文 时间:
2019-08-21 11:13:01
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95
Question Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “ ...
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其他好文 时间:
2019-08-19 09:34:44
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92
Given a number N, you are asked to count the number of integers between A and B inclusive which are relatively prime to N. Two integers are said to be ...
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其他好文 时间:
2019-08-15 22:45:15
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106
地址 http://poj.org/problem?id=2386 《挑战程序设计竞赛》习题 题目描述Description Due to recent rains, water has pooled in various places in Farmer John’s field, which i ...
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其他好文 时间:
2019-08-10 17:12:17
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82
/** * 计算两个坐标之间的距离(米) * @param float $fP1Lat 起点(纬度) * @param float $fP1Lon 起点(经度) * @param float $fP2Lat 终点(纬度) * @param float $fP2Lon 终点(经度) * @return... ...
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Web程序 时间:
2019-08-10 11:37:10
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143
Farmer John wants the cows to prepare for the county jumping competition, so Bessie and the gang are practicing jumping over hurdles. They are getting ...
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其他好文 时间:
2019-08-09 19:28:04
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75
Spark SQL中出现 CROSS JOIN 问题解决 1、问题显示如下所示: Use the CROSS JOIN syntax to allow cartesian products between these relation 2、原因: Spark 2.x版本中默认不支持笛卡尔积操作 3、 ...
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数据库 时间:
2019-08-09 13:22:49
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307