An improved particle swarm optimization algorithm

被引:267
作者
Jiang, Yan [1 ,2 ]
Hu, Tiesong [1 ]
Huang, ChongChao [3 ]
Wu, Xianing [1 ]
机构
[1] Wuhan Univ, State Key Lab Water Resource & Hydropower Engn Sc, Wuhan 430072, Peoples R China
[2] Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China
[3] Wuhan Univ, Sch Math & Stat, Wuhan 430072, Peoples R China
关键词
particle swarm optimization; improved particle swarm optimization; global optimization; hydrologic model; parameters calibration;
D O I
10.1016/j.amc.2007.03.047
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
An improved particle swarm optimization (IPSO) is proposed in this paper. In the new algorithm, a population of points sampled randomly from the feasible space. Then the population is partitioned into several sub-swarms, each of which is made to evolve based on particle swarm optimization (PSO) algorithm. At periodic stages in the evolution, the entire population is shuffled, and then points are reassigned to sub-swarms to ensure information sharing. This method greatly elevates the ability of exploration and exploitation. Simulations for three benchmark test functions show that IPSO possesses better ability to find the global optimum than that of the standard PSO algorithm. Compared with PSO, IPSO is also applied to identify the hydrologic model. The results show that IPSO remarkably improves the calculation accuracy and is an effective global optimization to calibrate hydrologic model. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:231 / 239
页数:9
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