The eco-material composition is not well-distributed in preparation. The eco-material samples were taken for computer image analysis, and its particle numbers and appearance parameters were measured. Based on the mech...The eco-material composition is not well-distributed in preparation. The eco-material samples were taken for computer image analysis, and its particle numbers and appearance parameters were measured. Based on the mechanism of connective mixing and diffusion, the particles distribution was simulated by a computer using the random walk with Levy flight. The results show that the eco-material microstructure simulated by a computer has an idealized porous structure. The particles distribution has a cluster characteristic that changes with the different size and number of particles in Levy flight trajectory. Each cluster consists of a collection of clusters and shows a structure of self-similar cluster,hence presents a well-defined fractal property. The results obtained from SEM observation are in good agreement with the numerical simulations, and show that the convective mixing presents in the Levy flight walk.展开更多
针对标准黏菌算法(Slime Mould Algorithm,SMA)收敛速度较慢、初始种群多样性低以及全局寻优较差等问题,提出一种基于混沌映射和莱维飞行的黏菌优化算法(Chaotic Map and Levy Flight based Slime Mould Optimization Algorithm,CLSMA)...针对标准黏菌算法(Slime Mould Algorithm,SMA)收敛速度较慢、初始种群多样性低以及全局寻优较差等问题,提出一种基于混沌映射和莱维飞行的黏菌优化算法(Chaotic Map and Levy Flight based Slime Mould Optimization Algorithm,CLSMA)。首先,利用circle混沌映射产生的混沌序列初始化黏菌种群,丰富黏菌种群多样性;其次,引入莱维飞行策略,改进黏菌在接近食物阶段的位置更新方式,扩大黏菌的搜索空间,增强算法全局搜索能力;最后,利用局部随机游走策略,提高算法在局部开发的能力,同时利用贪婪原则,选择是否更新黏菌的最优位置。为了验证改进算法的性能,选取12个基准测试函数将CLSMA与五种不同算法进行对比。实验结果表明,所提算法具有较好的收敛性,稳定性以及全局搜索的能力。展开更多
文摘The eco-material composition is not well-distributed in preparation. The eco-material samples were taken for computer image analysis, and its particle numbers and appearance parameters were measured. Based on the mechanism of connective mixing and diffusion, the particles distribution was simulated by a computer using the random walk with Levy flight. The results show that the eco-material microstructure simulated by a computer has an idealized porous structure. The particles distribution has a cluster characteristic that changes with the different size and number of particles in Levy flight trajectory. Each cluster consists of a collection of clusters and shows a structure of self-similar cluster,hence presents a well-defined fractal property. The results obtained from SEM observation are in good agreement with the numerical simulations, and show that the convective mixing presents in the Levy flight walk.
文摘针对标准黏菌算法(Slime Mould Algorithm,SMA)收敛速度较慢、初始种群多样性低以及全局寻优较差等问题,提出一种基于混沌映射和莱维飞行的黏菌优化算法(Chaotic Map and Levy Flight based Slime Mould Optimization Algorithm,CLSMA)。首先,利用circle混沌映射产生的混沌序列初始化黏菌种群,丰富黏菌种群多样性;其次,引入莱维飞行策略,改进黏菌在接近食物阶段的位置更新方式,扩大黏菌的搜索空间,增强算法全局搜索能力;最后,利用局部随机游走策略,提高算法在局部开发的能力,同时利用贪婪原则,选择是否更新黏菌的最优位置。为了验证改进算法的性能,选取12个基准测试函数将CLSMA与五种不同算法进行对比。实验结果表明,所提算法具有较好的收敛性,稳定性以及全局搜索的能力。
