描述 Blackouts and Dark Nights (also known as ACM++) is a company that provides electricity. The company owns several power plants, each of them supplying a small area that surrounds it. This organization brings a lot of problems - it often happens tha…
国外的文献汇总: <Network Traffic Classification via Neural Networks>使用的是全连接网络,传统机器学习特征工程的技术.top10特征如下: List of Attributes Port number server Minimum segment size client→server First quartile of number of control bytes in each packet client→server Maximum n…
分组后,统计记录条数: SELECT num,count(*) AS counts from test_a GROUP BY num; 查询结果如下: 对num去重后的数量的统计: SELECT count(t.counts) FROM ( SELECT num,count(*) AS counts from test_a GROUP BY num ) AS t; SELECT count(DISTINCT num) AS count FROM test_a; 它俩结果一样,都是5:只是一个是子…
Electricity POJ - 2117 题目描述 Blackouts and Dark Nights (also known as ACM++) is a company that provides electricity. The company owns several power plants, each of them supplying a small area that surrounds it. This organization brings a lot of proble…
SPF Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 7136 Accepted: 3255 Description Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a…
function delParam(paramKey) { var url = window.location.href; //页面url var urlParam = window.location.search.substr(1); //页面参数 var beforeUrl = url.substr(0, url.indexOf("?")); //页面主地址(参数之前地址) var nextUrl = ""; var arr = new Array(); if…
描述 Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a failure of a single node, 3, in the network on the left would prevent some of the still availabl…
SPF Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 8114 Accepted: 3716 Description Consider the two networks shown below. Assuming that data moves around these networks only between directly connected nodes on a peer-to-peer basis, a…