针对动态对抗场景中因节点损毁导致打击链中断的问题,提出一种基于断点复用与局部搜索的在线重构方法。构建“物理-功能-状态”三层抽象网络模型,实现节点、连边与语义约束的统一建模。引入改进的非支配排序遗传算法(non-dominated sort...针对动态对抗场景中因节点损毁导致打击链中断的问题,提出一种基于断点复用与局部搜索的在线重构方法。构建“物理-功能-状态”三层抽象网络模型,实现节点、连边与语义约束的统一建模。引入改进的非支配排序遗传算法(non-dominated sorting genetic algorithm,NSGA)-II以保留可用前段链路、压缩搜索空间,并结合逼近理想解的排序法(technique for order preference by similarity to ideal solution,TOPSIS)实现毫秒级的帕累托最优解决策。仿真结果表明,所提方法在链路重构时延上较传统策略降低62%,在装备资源下降20%的条件下仍可保持极高的任务完成率,且算法复杂度随节点规模线性增长,满足主流分布式作战体系对实时性与扩展性的需求。展开更多
The present work studies and identifies the different variables that affect the output parameters involved in a single cylinder direct injection compression ignition (CI) engine using jatropha biodiesel. Response su...The present work studies and identifies the different variables that affect the output parameters involved in a single cylinder direct injection compression ignition (CI) engine using jatropha biodiesel. Response surface methodology based on Central composite design (CCD) is used to design the experiments. Mathematical models are developed for combustion parameters (Brake specific fuel consumption (BSFC) and peak cylinder pressure (Pmax)), performance parameter brake thermal efficiency (BTE) and emission parameters (CO, NOx, unburnt HC and smoke) using regression techniques. These regression equations are further utilized for simultaneous optimization of combustion (BSFC, Pmax), performance (BTE) and emission (CO, NOx, HC, smoke) parameters. As the objective is to maximize BTE and minimize BSFC, Pmax, CO, NOx, HC, smoke, a multi- objective optimization problem is formulated. Non- dominated sorting genetic algorithm-II is used in predict- ing the Pareto optimal sets of solution. Experiments are performed at suitable optimal solutions for predicting the combustion, performance and emission parameters to check the adequacy of the proposed model. The Pareto optimal sets of solution can be used as guidelines for the end users to select optimal combination of engine outputand emission parameters depending upon their own requirements.展开更多
摘要针对动态对抗场景中因节点损毁导致打击链中断的问题,提出一种基于断点复用与局部搜索的在线重构方法。构建“物理-功能-状态”三层抽象网络模型,实现节点、连边与语义约束的统一建模。引入改进的非支配排序遗传算法(non-dominated sorting genetic algorithm,NSGA)-II以保留可用前段链路、压缩搜索空间,并结合逼近理想解的排序法(technique for order preference by similarity to ideal solution,TOPSIS)实现毫秒级的帕累托最优解决策。仿真结果表明,所提方法在链路重构时延上较传统策略降低62%,在装备资源下降20%的条件下仍可保持极高的任务完成率,且算法复杂度随节点规模线性增长,满足主流分布式作战体系对实时性与扩展性的需求。
摘要The present work studies and identifies the different variables that affect the output parameters involved in a single cylinder direct injection compression ignition (CI) engine using jatropha biodiesel. Response surface methodology based on Central composite design (CCD) is used to design the experiments. Mathematical models are developed for combustion parameters (Brake specific fuel consumption (BSFC) and peak cylinder pressure (Pmax)), performance parameter brake thermal efficiency (BTE) and emission parameters (CO, NOx, unburnt HC and smoke) using regression techniques. These regression equations are further utilized for simultaneous optimization of combustion (BSFC, Pmax), performance (BTE) and emission (CO, NOx, HC, smoke) parameters. As the objective is to maximize BTE and minimize BSFC, Pmax, CO, NOx, HC, smoke, a multi- objective optimization problem is formulated. Non- dominated sorting genetic algorithm-II is used in predict- ing the Pareto optimal sets of solution. Experiments are performed at suitable optimal solutions for predicting the combustion, performance and emission parameters to check the adequacy of the proposed model. The Pareto optimal sets of solution can be used as guidelines for the end users to select optimal combination of engine outputand emission parameters depending upon their own requirements.