为了提高专门用于战场的DTN路由算法效率并满足区分消息优先级的需要,通过对一些具有代表性的容迟容断网络路由算法的分析,结合战场实际,在部队整体作战性能和网络通信质量之间做出了合理权衡,提出了基于多级队列和改进的EZF(elliptical...为了提高专门用于战场的DTN路由算法效率并满足区分消息优先级的需要,通过对一些具有代表性的容迟容断网络路由算法的分析,结合战场实际,在部队整体作战性能和网络通信质量之间做出了合理权衡,提出了基于多级队列和改进的EZF(elliptical zone forwarding)策略的战场环境下DTN网络路由算法B-DTN(battlefield DTN),并在ONE仿真平台上进行了仿真。仿真结果表明,B-DTN在保证高优先级消息优先送达的前提下,投递率和整体传输时延相对于传统路由算法仍有较大改善。展开更多
A novel rule-based model for multi-stage multi-product scheduling problem(MMSP)in batch plants with parallel units is proposed.The scheduling problem is decomposed into two sub-problems of order assignment and order s...A novel rule-based model for multi-stage multi-product scheduling problem(MMSP)in batch plants with parallel units is proposed.The scheduling problem is decomposed into two sub-problems of order assignment and order sequencing.Firstly,hierarchical scheduling strategy is presented for solving the former sub-problem,where the multi-stage multi-product batch process is divided into multiple sequentially connected single process stages,and then the production of orders are arranged in each single stage by using forward order assignment strategy and backward order assignment strategy respectively according to the feature of scheduling objective.Line-up competition algorithm(LCA)is presented to find out optimal order sequence and order assignment rule,which can minimize total flow time or maximize total weighted process time.Computational results show that the proposed approach can obtain better solutions than those of the literature for all scheduling problems with more than 10 orders.Moreover,with the problem size increasing,the solutions obtained by the proposed approach are improved remarkably.The proposed approach has the potential to solve large size MMSP.展开更多
文摘为了提高专门用于战场的DTN路由算法效率并满足区分消息优先级的需要,通过对一些具有代表性的容迟容断网络路由算法的分析,结合战场实际,在部队整体作战性能和网络通信质量之间做出了合理权衡,提出了基于多级队列和改进的EZF(elliptical zone forwarding)策略的战场环境下DTN网络路由算法B-DTN(battlefield DTN),并在ONE仿真平台上进行了仿真。仿真结果表明,B-DTN在保证高优先级消息优先送达的前提下,投递率和整体传输时延相对于传统路由算法仍有较大改善。
基金Supported by the National Natural Science Foundation of China(21376185)
文摘A novel rule-based model for multi-stage multi-product scheduling problem(MMSP)in batch plants with parallel units is proposed.The scheduling problem is decomposed into two sub-problems of order assignment and order sequencing.Firstly,hierarchical scheduling strategy is presented for solving the former sub-problem,where the multi-stage multi-product batch process is divided into multiple sequentially connected single process stages,and then the production of orders are arranged in each single stage by using forward order assignment strategy and backward order assignment strategy respectively according to the feature of scheduling objective.Line-up competition algorithm(LCA)is presented to find out optimal order sequence and order assignment rule,which can minimize total flow time or maximize total weighted process time.Computational results show that the proposed approach can obtain better solutions than those of the literature for all scheduling problems with more than 10 orders.Moreover,with the problem size increasing,the solutions obtained by the proposed approach are improved remarkably.The proposed approach has the potential to solve large size MMSP.
