Metaheuristic algorithms are pivotal in cloud task scheduling. However, the complexity and uncertainty of the scheduling problem severely limit algorithms. To bypass this circumvent, numerous algorithms have been prop...Metaheuristic algorithms are pivotal in cloud task scheduling. However, the complexity and uncertainty of the scheduling problem severely limit algorithms. To bypass this circumvent, numerous algorithms have been proposed. The Hiking Optimization Algorithm (HOA) have been used in multiple fields. However, HOA suffers from local optimization, slow convergence, and low efficiency of late iteration search when solving cloud task scheduling problems. Thus, this paper proposes an improved HOA called CMOHOA. It collaborates with multi-strategy to improve HOA. Specifically, Chebyshev chaos is introduced to increase population diversity. Then, a hybrid speed update strategy is designed to enhance convergence speed. Meanwhile, an adversarial learning strategy is introduced to enhance the search capability in the late iteration. Different scenarios of scheduling problems are used to test the CMOHOA’s performance. First, CMOHOA was used to solve basic cloud computing task scheduling problems, and the results showed that it reduced the average total cost by 10% or more. Secondly, CMOHOA has been applied to edge fog cloud scheduling problems, and the results show that it reduces the average total scheduling cost by 2% or more. Finally, CMOHOA reduced the average total cost by 7% or more in scheduling problems for information transmission.展开更多
针对传统灰狼优化(Grey Wolf Optimization, GWO)算法求解无人机三维路径规划问题时会出现收敛速度慢、容易陷入局部最优等问题,提出一种改进混合灰狼优化算法——CLGWO。基于Cat混沌映射和反向学习策略初始化灰狼种群,为算法全局搜索...针对传统灰狼优化(Grey Wolf Optimization, GWO)算法求解无人机三维路径规划问题时会出现收敛速度慢、容易陷入局部最优等问题,提出一种改进混合灰狼优化算法——CLGWO。基于Cat混沌映射和反向学习策略初始化灰狼种群,为算法全局搜索过程中丰富种群多样性奠定基础;提出新型非线性收敛因子的改进策略,提高算法全局搜索能力。在灰狼位置更新中提出引入狮群优化(Lion Swarm Optimization, LSO)算法的扰动因子和动态权重,使灰狼具有主动的搜索能力,避免因灰狼失去种群多样性而陷入局部最优。为验证改进算法的有效性,进行了8个国际通用的标准测试函数收敛性对比实验和无人机三维路径规划仿真实验。实验结果表明,CLGWO算法在单峰、多峰函数上均有较好的收敛性、较高的寻优精度;三维路径仿真环境下,CLGWO算法的平均路径长度、平均迭代次数、平均运行时间相比于GWO算法分别优化了33%、31%、52%,且路径转折少,能较好地得到全局最优值,验证了CLGWO算法的有效性。展开更多
基金supported by the National Natural Science Foundation of China (52275480)the Guizhou Provincial Science and Technology Program of Qiankehe Zhongdi Guiding ([2023]02)+1 种基金the Guizhou Provincial Science and Technology Program of Qiankehe Platform Talent Project (GCC[2023]001)the Guizhou Provincial Science and Technology Project of Qiankehe Platform Project (KXJZ[2024]002).
文摘Metaheuristic algorithms are pivotal in cloud task scheduling. However, the complexity and uncertainty of the scheduling problem severely limit algorithms. To bypass this circumvent, numerous algorithms have been proposed. The Hiking Optimization Algorithm (HOA) have been used in multiple fields. However, HOA suffers from local optimization, slow convergence, and low efficiency of late iteration search when solving cloud task scheduling problems. Thus, this paper proposes an improved HOA called CMOHOA. It collaborates with multi-strategy to improve HOA. Specifically, Chebyshev chaos is introduced to increase population diversity. Then, a hybrid speed update strategy is designed to enhance convergence speed. Meanwhile, an adversarial learning strategy is introduced to enhance the search capability in the late iteration. Different scenarios of scheduling problems are used to test the CMOHOA’s performance. First, CMOHOA was used to solve basic cloud computing task scheduling problems, and the results showed that it reduced the average total cost by 10% or more. Secondly, CMOHOA has been applied to edge fog cloud scheduling problems, and the results show that it reduces the average total scheduling cost by 2% or more. Finally, CMOHOA reduced the average total cost by 7% or more in scheduling problems for information transmission.
