摘要
本文研究利用最小二乘支持向量机(least squares support vector machine,LS-SVM)算法建立城市小时级需水量预测模型.采取精英策略,自适应的速度更新权重系数,同时引入粒子历史最优信息对引力搜索算法(gravitational search algorithm,GSA)进行了改进.最后采用改进型引力搜索算法(ameliorated gravitational search algorithm,AGSA)优化LS-SVM水量预测模型的正规化参数和核参数来提高模型的预测精度及预测速度.理论测试与实例分析表明,基于AGSA比基于GSA,遗传算法(genetic algorithms,GA)和粒子群优化算法(particle swarm optimization,PSO)的LS-SVM水量预测模型具有更好的预测精度,从而验证了基于AGSA的LS-SVM算法适用于小时级需水量预测问题,AGSA适用于多领域的模型参数的优化过程.
We investigate the model of hourly urban water demand forecasting with least squares support vector ma-chine （LS-SVM）. The convergence performance of gravitational search algorithm （GSA） is improved by employing anelite strategy and an adaptive velocity with updated weighting factor. Furthermore, the historical optimal information isintroduced to speed up the convergence of GSA. The ameliorated GSA, called AGSA, is adopted to optimize the regulariza-tion parameters and kernel parameters of LS-SVM used in the hourly urban water demand prediction model. Theoreticalanalysis and experimental results show that the AGSA-based hourly urban water demand forecasting model achieves betterregression precision than other models respectively based on particle swarm optimization （PSO）, genetic algorithms （GA）,and GSA. This implies that AGSA-based LS-SVM algorithm can be successfully used to build the model of hourly urbanwater demand forecasting. In fact, AGSA can also be applied to process of parameter optimization in many other fields.
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
2014年第10期1377-1382,共6页
Control Theory & Applications
基金
国家自然科学基金资助项目(61174059
61233004
61433002)
国家"973"计划资助项目(2013CB035406)
上海市经信委重大技术装备研制专项基金资助项目(ZB-ZBYZ-01112634)
上海市经信委引进技术与创新项目资助(12GA-31)
关键词
智能控制
需水量预测
最小二乘支持向量机
改进的引力搜索算法
intelligent control
water demand forecasting
least squares support vector machine
ameliorated gravita-tional search algorithm
