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资源合理调度是云计算研究热点。针对混合蛙跳算法不足,提出一种改进混合蛙跳算法的云计算资源调度策略(ISF-LA)。首先在局部寻优过程中引入粒子更新思想,加快收敛速度,然后在全局寻优中对最优个体进行混沌扰动,降低局部最优出现的概率,最后在CloudSim平台进行仿真实验。结果表明,ISFLA缩短了云计算任务的完成时间,资源的负载分配更加合理。  相似文献   
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针对多目标优化问题提出一种自适应混沌混合蛙跳算法 MACSFLA(Adaptive chaos shuffled frog leaping algorithm for mul-tiobjective optimization)。使用动态权重因子策略以提高混合蛙跳算法 SFLA(Shuffled Frog Leaping Algorithm)收敛效率,引入基于 Pa-reto 支配能力的 SFLA 子族群划分策略,使得 SFLA 能够应用于多目标优化问题。在此基础上,MACSFLA 首先利用 SFLA 快速寻优能力接近理论 Pareto 最优解,然后采用自适应网格密度机制动态维护外部存储器 Pareto 最优解规模,并使用自适应混沌优化技术改善 Pareto 最优解集样本多样性,最后利用 Pareto 最优解选择策略为青蛙种群选择最优更新粒子。多目标函数测试实验结果表明,与MOPSO 和 NSGA-Ⅱ相比,MACSFLA 在 Pareto 最优解集均匀性和多样性上有明显优势。  相似文献   
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Affective design and the determination of engineering specifications are commonly conducted separately in early product design stage. Generally, designers and engineers are required to determine the settings of design attributes (for affective design) and engineering requirements (for engineering design), respectively, for new products. Some design attributes and some engineering requirements could be common. However, the settings of the design attributes and engineering requirements could be different because of the separation of the two processes. In previous studies, a methodology that considers the determination of the settings of the design attributes and engineering requirements simultaneously was not found. To bridge this gap, a methodology for considering affective design and the determination of engineering specifications of a new product simultaneously is proposed. The proposed methodology mainly involves generation of customer satisfaction models, formulation of a multi-objective optimisation model and its solving using a chaos-based NSGA-II. To illustrate and validate the proposed methodology, a case study of mobile phone design was conducted. A validation test was conducted and the test results showed that the customer satisfaction values obtained based on the proposed methodology were higher than those obtained based on the combined standalone quality function deployment and standalone affective design approach.  相似文献   
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