为提高云计算任务调度的效率,减少系统执行任务的最大完工时间以及成本,本文提出一种改进的人工鱼群任务调度算法(improved artificial fish swarm algorithm,IAFSA).首先,将反向学习策略应用于种群初始化和鱼群的行为选择中,以提高改...为提高云计算任务调度的效率,减少系统执行任务的最大完工时间以及成本,本文提出一种改进的人工鱼群任务调度算法(improved artificial fish swarm algorithm,IAFSA).首先,将反向学习策略应用于种群初始化和鱼群的行为选择中,以提高改进人工鱼群算法在迭代中的收敛速度和种群多样性.其次,将自适应全局-局部记忆机制引入到标准AFSA算法的觅食行为中,以进一步提高勘探能力.最后,增加了基于平均适应度的行为选择机制,以提供更合理的行为选择,减少算法的复杂性.通过使用CloudSim平台进行实验验证,分别测试在不同任务规模下IAFSA的算法效能.实验结果表明,改进人工鱼群算法在降低系统任务最大完工时间和成本上均表现出了显著的优势.展开更多
The scenic spots in Wuhan offered all sorts of activities during the Chinese New Year.At the Haichang Polar Ocean Park,folk artists entertained people with"molten iron fireworks.""This is the first time...The scenic spots in Wuhan offered all sorts of activities during the Chinese New Year.At the Haichang Polar Ocean Park,folk artists entertained people with"molten iron fireworks.""This is the first time I have seen iron fireworks.They are really amazing!Much more beautiful than ordinary ones,"said Ms Zhang excitedly while watching them go off.The underwater dragon dance performance in the park also attracted the attention of many tourists.The performers energetically twisted and turned a 10-meter-long man-made dragon in the water creating the illusion that the dragon was dancing with the fish.展开更多
文摘为提高云计算任务调度的效率,减少系统执行任务的最大完工时间以及成本,本文提出一种改进的人工鱼群任务调度算法(improved artificial fish swarm algorithm,IAFSA).首先,将反向学习策略应用于种群初始化和鱼群的行为选择中,以提高改进人工鱼群算法在迭代中的收敛速度和种群多样性.其次,将自适应全局-局部记忆机制引入到标准AFSA算法的觅食行为中,以进一步提高勘探能力.最后,增加了基于平均适应度的行为选择机制,以提供更合理的行为选择,减少算法的复杂性.通过使用CloudSim平台进行实验验证,分别测试在不同任务规模下IAFSA的算法效能.实验结果表明,改进人工鱼群算法在降低系统任务最大完工时间和成本上均表现出了显著的优势.
文摘The scenic spots in Wuhan offered all sorts of activities during the Chinese New Year.At the Haichang Polar Ocean Park,folk artists entertained people with"molten iron fireworks.""This is the first time I have seen iron fireworks.They are really amazing!Much more beautiful than ordinary ones,"said Ms Zhang excitedly while watching them go off.The underwater dragon dance performance in the park also attracted the attention of many tourists.The performers energetically twisted and turned a 10-meter-long man-made dragon in the water creating the illusion that the dragon was dancing with the fish.