三种机器学习分类在LNG泄漏风险评估中的比较

Comparison of three machine learning classification models of the risk assessment of LNG leakage

根据LNG储运行业法律法规要求,结合企业真实生产情况和相关专家意见,梳理出LNG泄漏风险评估体系,包括5个一阶评估指标和20个二阶评估指标。对多家真实企业LNG泄漏风险管理及相关后果进行评估,得出37条样本组成的数据集。将该数据集运用核支持向量机、随机森林以及神经网络三种分类模型处理,比较三种机器学习分类模型在分类准确率上的差别;根据分类效果研究相关参数对准确率的影响。结果认为,核支持向量机和神经网络需要进行细致的参数调整以保证较好的准确率,随机森林受到参数影响效果较小。根据分类指标权重的比较提出相应的控制风险对策措施。

This research first summarized the system of LNG leakage risk, according to the requirements of the laws and regulations in LNG storage and transportation industry, and combined with the situation of enterprises and opinions of experts. The system included 5 first- order indicators and 20 second- order indicators. This research obtained a data set of 37 samples, by assessing the risk management and consequences in real enterprises. This data set was applied to three classification models, namely SVM, Random Forest Classification and Neural Network, to compare the differences of accuracy among these machine learning classification models, and to study the influence of relevant parameters on accuracy. It was concluded that SVM and Neural Network needed to adjust the parameters carefully to ensure a better accuracies, while the Random Forest Classification was not affected by the parameters. Corresponding risk control measures were put forward by compared the weights of second-order indicators.