有向图 Introduction 就是边是有方向的,像单行道那样,也有很多典型的应用. 点的出度指从这个点发出的边的数目,入度是指向点的边数.当存在一条从点 v 到点 w 的路径时,称点 v 能够到达点 w ,但要注意这并不意味着点 w 可以到达点 v . Digraph API 先给出表示有向图的 API 以及简单的测试用例,booksite-4.2 上可以找到完整的. API Sample Client 运行示例 仍然使用邻接表来实现有向图,比无向图还简单其实. Adjacency-list…

带权图的最小生成树--Prim算法和Kruskal算法 带权图的最短路径算法--Dijkstra算法 package graph; // path.java // demonstrates shortest path with weighted, directed graphs 带权图的最短路径算法 // to run this program: C>java PathApp ////////////////////////////////////////////////////////////…

title: 3-HOP: A High-Compression Indexing Scheme for Reachability Query venue: SIGMOD'09 author: Ruoming Jin, Yang Xiang, Ning Ruan, and David Fuhry abstract: Reachability queries on large directed graphs have attracted much attention recently. The e…

RDF RDF用于信息需要被应用程序处理而不是仅仅显示给人观看的场合.RDF提供了一种用于表达这一信息.并使其能在应用程序间交换而不丧失语义的通用框架.既然是通用框架,应用程序设计者可以利用现成的通用RDF解析器(RDF parser)以及通用的处理工具.能够在不同的应用程序间交换信息意味着对于那些并非信息的最初创建者的应用程序也是可利用这些信息. Detail in RDF入门推荐标准 Link Data Linked Data [LINKED-DATA] is a way to create…

We have seen that directed graphical models specify a factorization of the joint distribution over a set of variables into a product of local conditional distributions. They also define a set of conditional independence properties that must be satisf…

Graph Search and Connectivity Generic Graph Search Goals 1. find everything findable 2. don't explore anything twice Generic Algorithm (given graph G, vertex S) --- initialize S explored (all others unexplored) --- while possible: --- choose an edge(…

A list of open source C++ libraries < cpp‎ | links http://en.cppreference.com/w/cpp/links/libs The objective of this page is to build a comprehensive list of open source C++ libraries, so that when one needs an implementation of particular functional…

Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to check whether these edges make up a valid tree. For example: Given n = 5 and edges = [[0, 1], [0, 2], [0, 3], [1, 4]], return tru…

More important than algorithms(just problems #$!%), the techniques/concepts residing at the base of such algorithms is more important. There are broadly 4 ways in which classification of algorithms can be done. Classification by purpose Each algorith…

Description Vasya's dad is good in maths. Lately his favorite objects have been "beautiful" directed graphs. Dad calls a graph "beautiful" if all the following conditions are true: The graph contains exactly \(N\) vertices and \(N−1\)…