الگوریتم جستجوی شرکت مصنوعی برای مسائل بهینه سازی عددی
|کد مقاله||سال انتشار||تعداد صفحات مقاله انگلیسی||ترجمه فارسی|
|10554||2013||19 صفحه PDF||سفارش دهید|
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Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Information Sciences, Volume 229, 20 April 2013, Pages 58–76
In this paper, a new two-population based global search algorithm, the Artificial Cooperative Search Algorithm (ACS), is introduced. ACS algorithm has been developed to be used in solving real-valued numerical optimization problems. For purposes of examining the success of ACS algorithm in solving numerical optimization problems, 91 benchmark problems that have different specifications were used in the detailed tests. The success of ACS algorithm in solving the related benchmark problems was compared to the successes obtained by PSO, SADE, CLPSO, BBO, CMA-ES, CK and DSA algorithms in solving the related benchmark problems by using Wilcoxon Signed-Rank Statistical Test with Bonferroni-Holm correction. The results obtained in the statistical analysis demonstrate that the success achieved by ACS algorithm in solving numerical optimization problems is better in comparison to the other computational intelligence algorithms used in this paper.
In general, population based computational intelligence algorithms , , , , , ,  and  are based on searching the global minimum value that belong to a numerical problem by means of natural or artificial agents by employing collective methods. Fast advancing technology and ongoing scientific research studies lead to the emergence of new and ever more complex numerical optimization problems creating the need for developing new optimization algorithms based on different techniques. In their natural habitat the living beings make use of various social behavior models , , ,  and  that they instinctively possess the ability to solve the problems they are faced with. Various population based computational intelligence algorithms that are developed on the basis of the subject matter behavioral methods are being widely used for many years in solving numerical optimization problems (i.e., Ant-Colony Optimization Algorithm (ACO)  and , Artificial Bee Colony Algorithm (ABC) , Particle Swarm Optimization Algorithm (PSO)  and , Cuckoo-Search Algorithm (CK) , Differential Evolution Algorithm (DE)  and , Biogeography-Based Optimization (BBO) , etc.). The scientific research studies for population based computational intelligence algorithms to search for the related search space that belong to a problem relatively in a more effective manner are ongoing. The social behavior strategies observed in living beings are very promising where studies are concerned with the development of new artificial agent interaction strategies to render population based computational intelligence algorithms relatively more effective. The social beings that have the ability to collectively solve problems in nature, use their skills to solve problems that may prove to be very difficult in relative terms to solve for a single lonely individual, with ease, such as, accommodation, reproduction, care of off-springs, finding food, defending oneself and similar. In nature one can observe different socialization strategies employed by different living beings; although the presocial living beings ,  and  were in possession of basic social functions such as collective living arrangements, reproduction mechanism, they would not be able to create new generations without the cooperation of their social groups. Subsocial species ,  and  show interest in the feeding, care, protection and education of their off-springs while the ones that are not sub-social show no interest at all. Parasocial living beings ,  and  generally prefer to lead a lonely life. In general, the socialization behavior plays a determining role on the level and methods of information sharing among living beings. The hierarchical social organizations established between living beings (i.e. eusociality ,  and ) display three main qualities; (1) In these social-being groups, an adult class is included, (2) Only a specific group is responsible from reproduction, and (3) The care of the next generation is under the social assurance of the group. The duties and status within a group of the individuals in an eusocial group are determined by means of a complex hierarchical network. The known most advanced living superorganisms are mainly created by eusocial beings (i.e. human beings, ants, termites, honey bees). Artificial eusocial bees used in ABC algorithm (i.e., employed bee, scout bee and onlooker bee) have different duties in the artificial colony . The gene variety available in social-being groups is very important to ensure sustaining the healthy existence of the group. Although all of our off-springs get their genes from us, they also possess their own unique genetic characteristics. A living being is the result of basic genetic processes taking place in the society such as gene variety, crossover, mutation, and selection. The genetic algorithms ,  and  and its derivatives solve numerical optimization problems on the basis of basic genetic rules (i.e., crossover, mutation, adaptation, selection). There are many metaheuristic optimization algorithms based on basic genetic rules (i.e., Covariance Matrix Adaptation Evolution Strategy (CMA-ES) , Differential Evolution and their derivatives ; Self-Adaptive Differential Evolution Algorithm, Adaptive Differential Evolution Algorithm, Strategy Adaptation Based Differential Evolution Algorithm (SADE) ). Eusocial living beings can live in large social colonies including vast number of individuals (i.e., superorganism)  and . Therefore, the problem and challenge solving skills of superorganisms are highly developed. The superorganism concept is the equivalent of distributed intelligence in swarm intelligence. Computational Swarm Intelligence algorithms simulate the superorganism mechanism that is observed in eusocial beings, by means of a population where each member matches a random solution of the related numerical optimization problem , ,  and . Many researchers, for purposes of developing new artificial agent-interaction and agent-evolution models, take advantage of behavior models that are inspired of natural behavioral patterns that are sometimes overly simplified and isolated of their details such as food searching, communication, joint caring for off-springs, superorganism creation of eusocial living beings. (i.e., ABC ,  and , ACO ,  and , Comprehensive Learning Particle Swarm Optimizer (CLPSO) , PSO2011  and , CK  and ). For this reason there might be definitive differences between the artificial-agent behavioral model that a computational swarm algorithm is based on and the actual behavioral patterns of the living beings existing in nature. Artificial agent behavioral models used in computational swarm intelligence based optimization algorithms are very useful tools that basically are based on smart random search algorithms and explain the functioning of the algorithms better  and . In general it is considered that a living being has either a short or long span individual memory capacity. Individual memory ensures that the person can take advantage of the experiences accumulated in solving a problem. On the other hand social memory is necessary to ensure that all the other members of a society take advantage of the experiences of an individual that achieve the best solution among all the other members of the mentioned society. PSO algorithms , ,  and  are based on searching a solution for a problem by taking advantage of individual and social experiences of agents making up the artificial superorganism. Bio-geographic research studies ,  and  have shown how important biological interaction is for living being groups. Biological interaction means the interaction among living beings for purposes of meeting their varied needs such as reproduction, food search, accommodation and protection from hunters. Biological interaction can be between the same or different species. There are many biological interaction methods with very different functioning mechanisms (i.e., Neutralism, Amensalism, Commensalism, Competition, Mutualism, and Parasitism) ,  and . The CK  and  is based on parasitism as the biological interaction model  and . The interactions between living beings inspired the development of various biogeography-based global search algorithms ,  and . A new global search algorithm that is based on biogeography (i.e., Biogeography-Based Optimization (BBO)) is provided under . As a philosophy BBO is strongly influenced by geographical distribution of biological species ,  and . In nature there is mutualism based biological interaction between many species of living beings. A biological interaction that does not affect any one of the species involved adversely is called neutralism. On the other hand, in amensalism that is another type of biological interaction, at least one of the species is affected adversely from others. During commensalism based biological interaction, the species neither benefit from or are damaged by each other. The living beings involved in a mutualism based biological interaction try to derive mutual benefits from the mentioned interaction ,  and . The most common type of biological interaction among living beings in nature is mutualism. In mutualism based biological interaction two different species groups derive benefits from each other. The groups of living beings with mutualism as biological interaction between each other can have their independent food search mechanism and from time to time they can subsist independent of each other. The mutualism based biological interaction between the species that are connected to each other by means of a link such as food chain may cause coextinction if any one of the related species becomes extinct. The mutualism based biological interaction among two species with either predator/prey or parasite/host relationship between each other is named as coevolution. The interaction of homogenous living beings that adopt mutualism is known as cooperation. If a living being does not derive any direct benefits from a cooperation based biological interaction then this type of cooperation based biological interaction is named as altruism. Basically biological interaction in living beings affects the socialization mechanism that is necessary for the development of superorganism behavior in living beings. Atoms, energy networks, information networks and galaxies are inanimate systems that display superorganism behavior. The ACS algorithm that is introduced in this paper has been inspired of mutualism and cooperation based biological interaction of two eusocial superorganisms living in the same habitat. The habitat concept in ACS algorithm matches the search space concept that belong to the related problem. In scientific literature, there are many research studies where PSO, SADE, CLPSO, BBO, CMA-ES, CK and differential evolution algorithms are used in numerical optimization problems. For this reason, PSO, SADE, CLPSO, BBO, CMA-ES, CK and DSA have been chosen as comparison algorithms for evaluating the numerical optimization problem solving success of the ACS algorithm. This paper is organized as follows: in Section 2, Computational Intelligence Algorithms are examined. In Section 3, Artificial Cooperative Search Algorithm is discussed in detail. In Section 4, use of Wilcoxon Signed-Rank Test for the Comparison of the Problem Solving Success of Computational-Intelligence Algorithms has been examined. In Section 5, details pertaining to the Experiments are indicated. In Section 6, Conclusions can be found.
نتیجه گیری انگلیسی
In this paper, ACS, a population based new swarm intelligence algorithm, has been presented. As a principle, ACS algorithm takes advantage of the biological interaction methods. The success of ACS algorithm in solving numerical optimization problems has been examined in detail in this paper by using 76 different benchmark problems. The success of ACS algorithm in solving numerical optimization problems are compared to the problem solving successes of PSO, SADE, CLPSO, BBO, CMA-ES, CK and DSA algorithms by using Wilcoxon Signed-Rank Test with Bonferroni-Holm correction. The success of ACS algorithm in solving real world problems was examined by using 4 constrained benchmark problems. In examining the success of ACS algorithm in solving large scale optimization problems, CEC’2008 benchmark problems were utilized. In examining the success of ACS algorithm in solving numerical optimization problems whose solutions are considered to be relatively difficult to work out, CEC’2005 benchmark problems were used. The solutions provided by ACS algorithm to 50 standard benchmark problems that are frequently used in scientific literature to examine the problem solving success of global search algorithms, were also analyzed. The results obtained by ACS algorithm and comparison algorithms for the benchmark problems were examined by using statistical methods. It must be noted here that in general, the problem solving success of computational intelligence algorithms varies according to the structure of the problem, dimensions of the problem and the initial values of the related control parameters. The detailed tests conducted demonstrate that ACS algorithm, in majority of the cases, statistically provides better solutions both in benchmark problems and real-world problems that have been used in this paper in comparison to the other types of algorithms employed. Although the structure of ACS algorithm is in general simpler than the structures of the computational intelligence algorithms, its problem solving success is statistically better than the subject matter algorithms. Its simple structure makes possible for ACS algorithm to be programmed easily in different programming languages while its application to different numerical optimization problems can be easily achieved. In general ACS algorithm is notably faster than the other algorithms used in this paper. The results obtained in this paper show that ACS algorithm can be used in solving unconstrained and constrained bounded-numerical optimization problems.