狄克斯特拉算法在社交网络中用于判定： Dijkstra’s Algorithm is used in social network for determining单项选择题

A

交友网络中，一个人与另一个人之间存在多少条路径。how many paths exist between a person and another person in the friendship network.

B

一个人是否与交友网络中的另一个人相连通。whether a person is connected to another person in the friendship network.

C

有多少人与某个人建立了交友关系。how many people are connected to a person their friendship relations.

D

一个人能以多快的速度向其他人传播信息。how fast a person can disseminate information to all other people.

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Question textApply Dijkstra's algorithm to find the shortest path from node 1 to all other nodes in the following directed graph. The numbers on the arcs represent costs , with data provided again below for completeness. Node 1: Node 2: Node 3: Node 4: Node 5: Node 6: Node 7: Node 8: Enter the shortest distance from node 1 to each node: Node 3: Answer 1 Question 3[input] predecessor = Answer 2 Question 3[input] Node 4: Answer 3 Question 3[input] Node 5: Answer 4 Question 3[input] If the problem of finding a shortest path from node 1 to node 3 was solved as a linear program with arc flow variables , then:The reduced cost of would be Answer 5 Question 3[input] If is the optimal value of the dual variables for the flow conservation constraints, then Answer 6 Question 3[input]

Dijkstra's Link State Algorithm Consider the incomplete 6-node network shown below, with given link costs; where links x and y are unknown   Consider the completed table below, which calculates the shortest distance to all nodes from U:   Nodes  d, (p) d, (p)  d, (p) d, (p) d, (p) U V W X Y Z shortest distance from node U  0 4, X 3, U 1, U 5, X 6, W   For link x (link from node X, to node Y) , what is the cost associated with this link? [Fill in the blank] For link y (link from node U to node W) , what is the cost associated with this link?[Fill in the blank]

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