摘要
选取华东地区某给水厂生产中积累的数据建立加药量预测模型,以求在给水厂中实现混凝剂的智能投加。在数据清洗时,针对水厂运行实际情况,结合局部离群因子(LOF)算法、K最近邻插补(KNN)算法与平滑滤波算法对随机误差进行处理。同时在建模前使用灰色关联度分析评估了各原水指标与混凝剂加药量的联系,对联系较为紧密的原水指标进行混凝机理的分析。模型选用BP神经网络,并使用贝叶斯优化算法对模型的参数寻优,建立了多个模型进行评估,其中最优模型在测试集6万个样本上的平均绝对误差为3.66 L/h,结果表明最优模型能够准确预测混凝剂加药量。在此基础上,展望将建立的智能投加模型应用于水厂加药系统中,帮助水厂加药系统的智能化改造方案的实施。
The data accumulated in the production of a drinking water plant in East China were selected to establish a dosing prediction model for intelligent coagulant dosing in the plant.During data cleaning,according to the operation conditions of the plant,the random error was processed by combining the local outlier factor(LOF) algorithm,K-nearest neighbor imputation(KNN) algorithm and data smoothing algorithm.The association of each raw water indicator with coagulant dosage was also evaluated using gray correlation analysis before modeling,and the closely related raw water indicators were analyzed for coagulation mechanism.The model uses BP neural network,and the Bayesian optimization algorithm was used to optimize the parameters of the model.Several models were built for evaluation,and the mean absolute error of the optimal model on sixty thousand samples in the test set was 3.66 L/h.The results show that the optimal model can accurately predict the dosage of coagulant.On this basis,the established intelligent dosing model was prospected to be applied to the water plant dosing system to help the implementation of the intelligent modification of the water plant dosing system.
作者
刘洪波
黄剑虹
张国荣
吴燕
刘丽梅
LIU Hongbo;HUANG Jianhong;ZHANG Guorong;WU Yan;LIU Limei(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Kunshan Tap Water Group Co.,Ltd.,Kunshan 215300,China;Kunshan Hanyuan Water Technology Co.,Ltd.,Kunshan 215300,China)
出处
《上海理工大学学报》
CAS
CSCD
北大核心
2022年第4期351-356,387,共7页
Journal of University of Shanghai For Science and Technology
关键词
给水厂
智能加药
局部离群因子
灰色关联度
BP神经网络
贝叶斯优化
drinking water plant
intelligent dosing
local outlier factor
grey correlation degree
BP neural network
Bayesian optimization
作者简介
第一作者:刘洪波(1979-),男,教授.研究方向:水处理及其智能化.E-mail:Liuhb@usst.edu.cn。
