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基于共享边的时延约束组播路由算法 被引量:6
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作者 李元臣 刘维群 《计算机应用》 CSCD 北大核心 2009年第11期2901-2903,共3页
为了优化在时延约束下的组播树代价,降低算法计算复杂度,研究了时延受限的Steiner树问题。分析了最短路径启发式(MPH)算法的执行过程,以此为基础提出一个基于共享边的时延约束组播路由算法ESAMPH。该算法在构建组播路由树时能够优先采... 为了优化在时延约束下的组播树代价,降低算法计算复杂度,研究了时延受限的Steiner树问题。分析了最短路径启发式(MPH)算法的执行过程,以此为基础提出一个基于共享边的时延约束组播路由算法ESAMPH。该算法在构建组播路由树时能够优先采用包含有较多的最短路径经过的节点,这样后面的组播成员节点到树上的最短路径也有可能经过这些节点,由此实现边的共享,降低了组播树的代价。仿真结果表明,ESAMPH算法在代价、延迟和计算时间之间能获得较好的平衡,综合性能较好。 展开更多
关键词 组播通信 STEINER树 最短路径启发式算法 服务质量 路由优化
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Obtain the optimal of logistics delivery network with annealing algorithm
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作者 Duan Jingmin Chang Yuejun +1 位作者 Li Zanxiang Cui Jianming 《Engineering Sciences》 EI 2013年第6期44-47,共4页
Simulated annealing(SA) algorithm is a heuristic algorithm,proposed one approximation algorithm of solving optimization combinatorial problems inspired by objects in the annealing process of heating crunch. The algori... Simulated annealing(SA) algorithm is a heuristic algorithm,proposed one approximation algorithm of solving optimization combinatorial problems inspired by objects in the annealing process of heating crunch. The algorithm is superior to the traditional greedy algorithm,which avoids falling into local optimum and reaches global optimum. There are often some problems to find the shortest path,etc in the logistics and distribution network, and we need optimization for logistics and distribution path in order to achieve the shortest,best,most economical,and so on. The paper uses an example of SA algorithm validation to verify it,and the method is proved to be feasible. 展开更多
关键词 SA algorithm global optimum logistics and distribution network
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