基于遗传算法的人工鱼群优化算法

人工鱼群算法(AFSA)是一种高效的群智能全局优化技术.通过对人工鱼群算法(AFSA)不足的研究,在遗传算法的基础上,提出了基于遗传算法的人工鱼群优化算法.该算法保留了人工鱼群算法(AFSA)简单、易实现的特点,同时克服了人工鱼漫无目的的随机游动或在非全局极值点的大量聚集,显著提高了算法的运行效率和求解质量.最后通过大量的函数和实例测试结果表明,与其它算法相比,该算法是可行和有效的,具有运行速度快和求解精度高等特点.     

Artificial compound eye: a survey of the state-of-the-art

An artificial compound eye system is the bionic system of natural compound eyes with much wider field-of-view, better capacity to detect moving objects and higher sensitivity to light intensity than ordinary single-aperture eyes. In recent years, renewed attention has been paid to the artificial compound eyes, due to their better characteristics inheriting from insect compound eyes than ordinary optical imaging systems. This paper provides a comprehensive survey of the state-of-the-art work on artificial compound eyes. This review starts from natural compound eyes to artificial compound eyes including their system design, theoretical development and applications. The survey of artificial compound eyes is developed in terms of two main types: planar and curved artificial compound eyes. Finally, the most promising future research developments are highlighted.     

人工鱼群算法在虚拟机分配中的应用

虚拟机分配是云数据中心的一个重要任务,它实现物理机和虚拟机的映射,这对整个云数据中心中计算集群的性能,响应时间和服务质量有重要影响。需要采用一定的虚拟机分配策略来保障在同一集群中自动地完成虚拟机分配,以便达到物理机集群的负载均衡,虚拟机迁移次数最小并且节能环保等目的。提出了一种添加新型行为策略的人工鱼群算法,并将该算法成功应用于虚拟机分配问题的求解。与多种虚拟机分配算法的对比结果表明,算法能更快获得符合云数据中心多个需求的分配方案,对于其他实时性要求较高的组合优化问题同样具有应用价值。     

求解多背包问题的人工鱼群算法

多背包问题是出现在现实世界中许多领域的一个NP-hard组合优化问题。提出一种基于人工鱼觅食,追尾、聚群等行为的求解多背包问题的优化算法。针对多约束导致大量非可行解的产生而使算法性能劣化的问题,采用基于启发式规则的调整算子,使人工鱼始终在可行解域中寻优。数值实验结果表明,提出的算法能够快速搜索到最优解。算法对其他有约束组合优化问题也具有应用价值。     

基于单纯形法的改进型人工鱼群算法

针对鱼群算法在局域搜索能力差的问题,提出一种基于单纯形法的改进型人工鱼群算法。利用单纯形算子在局部区域内分布更均匀且广泛的特征,在鱼群算法运行到后期时,将单纯形算子每隔一定代数引入到现有的鱼群算法中取代原来大量聚集在非极值点附近的人工鱼,有效改善个体质量,提高局部搜索精细度,进而提高算法的寻优精度。采用典型算例对算法性能进行了验证分析,研究结果表明,该算法在解决鱼群算法后期优化精度低问题时可以获得更好的效果。     

A review of particle swarm optimization. Part II: hybridisation,combinatorial, multicriteria and constrained optimization,and indicative applications

Particle Swarm Optimization (PSO), in its present form, has been in existence for roughly a decade, with formative research in related domains (such as social modelling, computer graphics, simulation and animation of natural swarms or flocks) for some years before that; a relatively short time compared with some of the other natural computing paradigms such as artificial neural networks and evolutionary computation. However, in that short period, PSO has gained widespread appeal amongst researchers and has been shown to offer good performance in a variety of application domains, with potential for hybridisation and specialisation, and demonstration of some interesting emergent behaviour. This paper aims to offer a compendious and timely review of the field and the challenges and opportunities offered by this welcome addition to the optimization toolbox. Part I discusses the location of PSO within the broader domain of natural computing, considers the development of the algorithm, and refinements introduced to prevent swarm stagnation and tackle dynamic environments. Part II considers current research in hybridisation, combinatorial problems, multicriteria and constrained optimization, and a range of indicative application areas.     

基于多核机群的人工鱼群并行算法

针对人工鱼群算法在复杂多峰函数优化问题上寻优精度低、后期搜索能力减弱且运行时间长等问题,提出一种基于多核机群的人工鱼群并行算法(PDN-AFS)。首先对人工鱼群算法的优势与不足进行分析,采用动态权衡因子策略并适时引入小生境机制,提出一种新的人工鱼群(DN-AFS)算法;然后根据多核机群的并行编程模型(MPI+OpenMP),对DN-AFS算法进行并行设计与分析,提出基于多核机群的人工鱼群并行算法;最后在多核机群环境下进行仿真实验。实验结果表明：该算法有效地提高了复杂多峰函数优化问题的收敛速度和寻优性能,并获得了较高的加速比。     

基于自适应动态邻域结构的人工鱼群算法

针对人工鱼群算法易陷入局部最优且寻优精度不高的问题,提出了一种基于自适应动态邻域结构的人工鱼群算法。算法中,每条人工鱼先根据鱼群中其他人工鱼与自身的距离及当前迭代次数自适应调整动态邻域结构,再根据该动态邻域结构自适应计算视野和步长;还结合粒子群算法信息策略和公告板对人工鱼的行为进行了改进。仿真实验结果表明,该算法克服局部极值实现全局寻优的能力更强,优化精度更高。     

求解组合优化问题的鱼群算法的收敛性证明

为了证明求解组合优化问题的人工鱼群算法的全局收敛性,将人工鱼群算法的搜索空间定义为离散空间,其中的每个点即为一个人工鱼的位置状态,其食物浓度即为该点的目标函数值。根据食物浓度大小将整个离散空间集合分为若干个非空子集;将所有人工鱼集合也对应划分为若干个非空子集。在人工鱼的觅食、聚群和追尾过程中,人工鱼从一个位置状态转移到任意一个位置状态的转移概率可以计算出来;人工鱼移动过程中的每个位置状态对应于有限Markov链上的一个状态,且满足可归约随机矩阵的稳定性条件,据此证明了工鱼群算法具有全局收敛性。     

Set-based discrete particle swarm optimization and its applications: a survey

Particle swarm optimization (PSO) is one of the most popular population-based stochastic algorithms for solving complex optimization problems. While PSO is simple and effective, it is originally defined in continuous space. In order to take advantage of PSO to solve combinatorial optimization problems in discrete space, the set-based PSO (S-PSO) framework extends PSO for discrete optimization by redefining the operations in PSO utilizing the set operations. Since its proposal, S-PSO has attracted increasing research attention and has become a promising approach for discrete optimization problems. In this paper, we intend to provide a comprehensive survey on the concepts, development and applications of S-PSO. First, the classification of discrete PSO algorithms is presented. Then the S-PSO framework is given. In particular, we will give an insight into the solution construction strategies, constraint handling strategies, and alternative reinforcement strategies in S-PSO together with its different variants. Furthermore, the extensions and applications of S-PSO are also discussed systemically. Some potential directions for the research of S-PSO are also discussed in this paper.     

粒子群和人工鱼群混合优化算法

提出基于粒子群的人工鱼群混合优化算法,该算法综合利用人工鱼群算法的良好全局收敛性和粒子群算法的局部快速收敛性、易实现性等优点,克服人工鱼群算法收敛速度慢及粒子群算法后期全局收敛差的缺点,发挥了两者的优越性,并成功应用于求解具有变量边界约束的非线性的复杂函数最优化问题和求解复杂化学方程根的问题。仿真结果表明,混合粒子群算法不仅具有较好的全局收敛性能,而且具有较快的收敛速度。     

Bloom filter applications in network security: A state-of-the-art survey

Undoubtedly, dealing with security issues is one of the most important and complex tasks various networks face today. A large number of security algorithms have been proposed to enhance security in various types of networks. Many of these solutions are either directly or indirectly based on Bloom filter (BF), a space- and time-efficient probabilistic data structure introduced by Burton Bloom in 1970. Obviously, Bloom filters and their variants are getting more and more consideration in network security area. This paper provides an up-to-date survey of the application of BFs and their variants to improve performance of the approaches proposed to address security problems with different types of networks.     

人工鱼群与微粒群混合优化算法*

针对人工鱼群算法局部搜索不精确、微粒群优化算法易发生过早收敛等问题,提出一种新的人工鱼群与微粒群混合优化算法。算法的主要思想是先利用人工鱼群的全局收敛性快速寻找到满意的解域,再利用粒子群算法进行快速的局部搜索,所得混合算法具有局部搜索速度快,而且具有全局收敛性能。最后,以五个标准函数和一个应用实例进行测试,测试结果表明,提出的算法在一定程度上避免了陷入局部极小,加快了收敛速度且提高了搜索精度。     

Multiobjective evolutionary algorithm for manufacturing scheduling problems: state-of-the-art survey

Scheduling is an important tool for a manufacturing system, where it can have a major impact on the productivity of a production process. In order to find an optimal solution to scheduling problems it gives rise to complex combinatorial optimization problems. Unfortunately, most of them fall into the class of NP-hard combinatorial problems. In this paper, we focus on the design of multiobjective evolutionary algorithms (MOEAs) to solve a variety of scheduling problems. Firstly, we introduce fitness assignment mechanism and performance measures for solving multiple objective optimization problems, and introduce evolutionary representations and hybrid evolutionary operations especially for the scheduling problems. Then we apply these EAs to the different types of scheduling problems, included job shop scheduling problem (JSP), flexible JSP, Automatic Guided Vehicle (AGV) dispatching in flexible manufacturing system (FMS), and integrated process planning and scheduling (IPPS). Through a variety of numerical experiments, we demonstrate the effectiveness of these Hybrid EAs (HEAs) in the widely applications of manufacturing scheduling problems. This paper also summarizes a classification of scheduling problems, and illustrates the design way of EAs for the different types of scheduling problems. It is useful to guide how to design an effective EA for the practical manufacturing scheduling problems. As known, these practical scheduling problems are very complex, and almost is a combination of different typical scheduling problems.     

多目标微粒群优化算法综述

作为一种有效的多目标优化工具,微粒群优化(PSO)算法已经得到广泛研究与认可.首先对多目标优化问题进行了形式化描述,介绍了微粒群优化算法与遗传算法的区别,并将多目标微粒群优化算法(MOPSO)分为以下几类:聚集函数法、基于目标函数排序法、子群法、基于Pareto支配算法和其他方法,分析了各类算法的主要思想、特点及其代表性算法.其次,针对非支配解的选择、外部档案集的修剪、解集多样性的保持以及微粒个体历史最优解和群体最优解的选取等热点问题进行了论述,并在此基础上对各类典型算法进行了比较.最后,根据当前MOPSO算法的研究状况,提出了该领域的发展方向.     

人工免疫算法及其应用研究

为了有效地解决病态的约束优化问题,提出了一种模拟生物免疫系统自我调节功能的人工免疫算法,介绍了算法的基本步骤,构造了几种人工免疫算子,分析了算法的收敛性.人工免疫算法继承了遗传算法“优胜劣汰”的自我淘汰机制,但新抗体的产生方法比遗传算法中新个体的产生方法灵活得多.在进行抗体选择时若能确保当时的最优抗体可以进入下一代抗体群,则人工免疫算法是全局收敛的.100个城市TSP问题的仿真实例显示人工免疫算法比遗传算法具有更强的全局搜索能力和收敛速度.     

改进的人工鱼群算法的参数分析

基于原始人工鱼群算法,进行觅食、追尾、聚群行为的改进,以及可视域的自适应调整,提出了改进的人工鱼群算法。算法采用不同的参数值进行匹配,以优化函数值为例进行仿真实验。实验分析研究了主要参数对该算法优化性能的影响,并得出了合理的参数取值,以解决人工鱼群算法寻优精度低、运行速度慢的问题;实验还通过不同函数验证了改进的人工鱼算法具有更高的求解精度、更快的执行速度、更高的稳定性等优点。     

改进人工鱼群算法在Hadoop作业调度算法的应用

在分析Hadoop缺省及改进的作业调度算法基础上,引入群智能算法,设计了基于改进人工鱼群算法的Hadoop作业调度算法.采用随机键方式对待分配任务进行编码,以任务总执行时间作为启发函数,并引入吞食行为和跳跃行为改进人工鱼群算法,以达到进一步改善作业调度算法性能的目的.实验结果表明,改进后的人工鱼群作业调度算法在异构环境下可以提高系统性能,降低运行时间.     

反向自适应高斯变异的人工鱼群算法

针对人工鱼群算法存在易陷入局部最优、鲁棒性差以及寻优精度低的问题,提出了反向自适应高斯变异的人工鱼群算法。改进后的算法引入了反向解,根据反向解调整人工鱼的移动方向以及位置,从而提供更多的机会发掘潜在的较优空间,使人工鱼群快速跳出局部最优,从全局角度提升算法的搜索性能。同时提出了一种非线性自适应视野步长策略,更好地平衡了全局搜索与局部搜索之间的关系。为了增加鱼群的多样性,降低人工鱼陷入早熟的可能性,提出了一种最优解引导的高斯变异机制。仿真实验结果表明,该算法能有效地提高人工鱼群的寻优精度、寻优质量及鲁棒性,并且避免了人工鱼群过早收敛。     

粒子群优化鱼群算法仿真分析

针对标准粒子群算法(PSO)寻优多维多极值函数成功率低,基本人工鱼群算法(AFSA)收敛速度和精度有待提高等问题,提出粒子群优化鱼群算法(PSO-FSA)。该算法将速度惯性、个体记忆和个体间交流等特征引入鱼群算法,使鱼群行为模式扩充至追尾、聚群、记忆、交流以及觅食。此外,定义参数max D动态限定鱼群搜索的视野和步长。仿真分析表明,粒子群优化鱼群算法较两种基本算法而言具有更快的收敛速度和寻优精度。