西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (4): 73-75.DOI: 10.3863/j.issn.1000-2634.2000.04.020

• 基础理论研究 • 上一篇    下一篇

遗传演化建模方法研究

陈伟1 李允1 段永刚1 黎明1 唐炳军2 杨应奎3   

  1. 1.西南石油学院,四川南充637001; 2.胜利油田孤东采油厂; 3.青海石油局生产运行处
  • 收稿日期:2000-05-06 修回日期:1900-01-01 出版日期:2000-11-20 发布日期:2000-11-20

EVOLUTIONARY MODELING BASED ON GENETIC MECHANISM

CHEN Wei LI Yun DUAN Yong-gang et al.   

  1. Southwest Petroleum inst
  • Received:2000-05-06 Revised:1900-01-01 Online:2000-11-20 Published:2000-11-20

摘要: 根据观测数据建模,首先需要确定模型的结构,其后才是估计模型参数,而模型结构的确定是建模过程中最困难的阶段。遗传演化建模根据生物遗传机制,随机构造一组模型表达式,应用简单的基因复制、杂交和变异算子进行模型结构调整,同时进行非线性优化估计模型参数,从而得到一组优化的模型。遗传演化建模能够获得简单的显式表达式,在内插和外推特性上比人工神经网络建模方法更优越。
 

关键词: 演化计算, 遗传算法, 自适应建模, 结构, 优化

Abstract:

Model building with observed data has two steps, which first determines model structure and is most hard, and then estimate parameters. Evolutionary modeling based on genetic algorithms can obtain a set of optimized models by simulating natural selection and evolutionary of organism. It will create a set
of model expressions at random, and adjust their structures with eproduction, crossover and mutation operation, and estimate parameters simultaneity by nonlinear regression. The explicit simple models can be derived from evolutionary modeling and have superiority interpolation and extrapolation to artificial neural network.

Key words: evolutionary computation, genetic algorithms, adaptive modeling, structure, optimization

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