受生物蚂蚁觅食行为的启发,拓展蚁群系统的性能,以正态分布模拟信息素的密度分布,并以此进行随机数抽样,构成蚁群的状态转移规则。系统将随着蚂蚁的移动调整分布函数,实施信息素更新,蚁群在信息素的引导下逐步向最优食物源聚集。系统还...受生物蚂蚁觅食行为的启发,拓展蚁群系统的性能,以正态分布模拟信息素的密度分布,并以此进行随机数抽样,构成蚁群的状态转移规则。系统将随着蚂蚁的移动调整分布函数,实施信息素更新,蚁群在信息素的引导下逐步向最优食物源聚集。系统还引入优进策略和变异策略,加强局部挖掘和全局探索机制,提高蚁群的寻优能力,构建为混合连续蚁群系统(hybrid continuous ant colony system,HCACS)。经多种经典函数的测试,表明HCACS适用于连续优化问题,性能良好,对于维数较高和搜索空间较宽广的问题,更具优势。HCACS算法的参数较少,设置简单,实用性较强。展开更多
Holographic research strategy (HRS) is a novel determinate optimization method.The principle of HRS is based on a special, two-dimensional presentation of a multidimensional space.This presentation was termed two-dime...Holographic research strategy (HRS) is a novel determinate optimization method.The principle of HRS is based on a special, two-dimensional presentation of a multidimensional space.This presentation was termed two-dimensional hologram.HRS translated the optimization operation in multidimensional space into finding better points in the neighborhood around the current best data points.In this way, HRS can find the global optimal parameters in all probability.However, HRS can’t be applied to optimize continuous variables, it was only used in optimizing discrete systems.Therefore, it is necessary of improving HRS and ensuring the optimization algorithm can being applied in multidimensional continuous systems.Modified holographic research strategy (MHRS) was designed for the purpose.MHRS changed continuous variables into discrete variables in the searching region firstly, and then found the optimum in the discrete system.In order to reduce the deviation between the continuous system and the discrete system, MHRS adopted iterative algorithm to shrink the searching region gradually according to the location of the current optimal value.Furthermore, in order to improve the efficiency of HRS in searching for the global optimum, random mutation operator was added to the optimizing process.Ten-dimensional Rastrigin function was applied to testing MHRS, the results demonstrated that its global optimization performance [JP+5]is superior [JP+4]to one of eugenic evolution genetic algorithm (EGA).Further, MHRS was applied to estimate the kinetic model parameters of residue hydrofining.Satisfactory results were obtained.展开更多
文摘受生物蚂蚁觅食行为的启发,拓展蚁群系统的性能,以正态分布模拟信息素的密度分布,并以此进行随机数抽样,构成蚁群的状态转移规则。系统将随着蚂蚁的移动调整分布函数,实施信息素更新,蚁群在信息素的引导下逐步向最优食物源聚集。系统还引入优进策略和变异策略,加强局部挖掘和全局探索机制,提高蚁群的寻优能力,构建为混合连续蚁群系统(hybrid continuous ant colony system,HCACS)。经多种经典函数的测试,表明HCACS适用于连续优化问题,性能良好,对于维数较高和搜索空间较宽广的问题,更具优势。HCACS算法的参数较少,设置简单,实用性较强。
文摘Holographic research strategy (HRS) is a novel determinate optimization method.The principle of HRS is based on a special, two-dimensional presentation of a multidimensional space.This presentation was termed two-dimensional hologram.HRS translated the optimization operation in multidimensional space into finding better points in the neighborhood around the current best data points.In this way, HRS can find the global optimal parameters in all probability.However, HRS can’t be applied to optimize continuous variables, it was only used in optimizing discrete systems.Therefore, it is necessary of improving HRS and ensuring the optimization algorithm can being applied in multidimensional continuous systems.Modified holographic research strategy (MHRS) was designed for the purpose.MHRS changed continuous variables into discrete variables in the searching region firstly, and then found the optimum in the discrete system.In order to reduce the deviation between the continuous system and the discrete system, MHRS adopted iterative algorithm to shrink the searching region gradually according to the location of the current optimal value.Furthermore, in order to improve the efficiency of HRS in searching for the global optimum, random mutation operator was added to the optimizing process.Ten-dimensional Rastrigin function was applied to testing MHRS, the results demonstrated that its global optimization performance [JP+5]is superior [JP+4]to one of eugenic evolution genetic algorithm (EGA).Further, MHRS was applied to estimate the kinetic model parameters of residue hydrofining.Satisfactory results were obtained.
