计算机与现代化

• 算法设计与分析 • 上一篇    下一篇

基于改进遗传算法的支持向量机参数优化方法

  

  1. 1.重庆交通大学管理学院,重庆400074;2.重庆交通大学信息科学与工程学院,重庆400074
  • 收稿日期:2014-11-07 出版日期:2015-03-23 发布日期:2015-03-26
  • 作者简介:王琼瑶(1987-),女,湖北黄冈人,重庆交通大学管理学院硕士研究生,研究方向:系统优化,决策与控制,数据挖掘; 何友全(1964-),男,重庆人,重庆交通大学信息科学与工程学院教授,硕士生导师,博士,研究方向:信息处理,数据挖掘; 彭小玲(1989-),女,江西抚州人,硕士研究生,研究方向:库存控制与优化,物流与供应链管理。
  • 基金资助:
    重庆市高等教育教学改革研究项目(0634167)

Parameters Optimization of Support Vector Machine Based on Improved Genetic Algorithm

  1. 1. School of Management, Chongqing Jiaotong University, Chongqing 400074, China;
    2. School of Information Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China
  • Received:2014-11-07 Online:2015-03-23 Published:2015-03-26

摘要: 针对支持向量机算法在回归预测时由于参数选取不当导致过学习或欠学习的情况,提出一种基于改进遗传算法的支持向量机参数优化模型。该模型将遗传算法与支持向量机结合,利用遗传算法进化搜索的原理对支持向量机具有重要意义的惩罚参数、核参数和损失函数同时优化。实验选取3组标准数据集作为测试数据集,并将改进算法同时与遗传算法、网格寻址算法、粒子群算法进行仿真测试结果对比。实验结果表明改进的算法较大地提高了支持向量机算法整体的寻优能力。

关键词: 遗传算法, 支持向量机算法, 参数优化

Abstract:  Over-study or under-study phenomenon sometimes happens, since nuclear parameters are chosen inappropriately in regression forecasting. The paper proposes a kind of support vector machine parameters optimization model based on improved genetic algorithm. By combining genetic algorithm with support vector machine algorithm, the model makes use of the principle of evolutionary of genetic algorithm to optimize penalty parameter, nuclear parameter and loss function at the same time, which are of great significance to support vector machine algorithm. Three sets of standard experiment data sets are selected as the test data set, and simulation test results are compared among the improved algorithm, genetic algorithm, particle swarm optimization algorithm and grid search algorithm. Experiment results show that the improved algorithm greatly improves the whole optimization ability of support vector machine algorithm.

Key words: genetic algorithm, support vector machine algorithm, parameters optimization

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