r15

MIT6.006 R15. Shortest Paths

倾然丶 夕夏残阳落幕 提交于 2020-01-16 02:59:50
BFS for Shortest Paths BFS can actually be used to find shortest paths! …provided that all weights equal 1. How can we fix this to apply to more general cases? We may use a priority queue instead. Each time we pop out only the nearest guy and deal with it, but that would be Dijkstra. A simpler thing that we can do is to add fake nodes to the graph . For example, 3 fake nodes for an edge with length 4, just to split up the edge into small unit edges. Analysis for the tweaked BFS: E = W ′ E ′ , V = W ′ E ′ + V ′ E=W'E',V=W'E'+V' E = W ′ E ′ , V = W ′ E ′ + V ′ T ( n ) = O ( V ′ + W ′ E ′ ) T(n)

5G基础_02 5G协议标准化及当前进展

匆匆过客 提交于 2020-01-11 22:38:16
5G版本1: ——5G新空口:采用gNB,与NGC(全新的核心网) 5G版本2:——LTE演进:沿用LTE的eNB,EPC,只是软件更新 R15已经冻结 ITU-T:政府组织,只负责指定愿景 3GPP:商业组织,定义如何实现,由ITU验收 R15 Phase-1,分为NAS与SA两部分 NSA:非独立组网/借助LTE实现组网;2017年12月底冻结 SA:独立组网 5G 主力版本:R15/R16,目前R15已经冻结 来源: CSDN 作者: 史努B 链接: https://blog.csdn.net/f2157120/article/details/103940794