1. 东南大学江苏省城市智能交通重点实验室,南京,211189
2. 东南大学现代城市交通技术江苏高校协同创新中心,南京,211189
3. 东南大学交通学院,南京,211189
4. 南洋理工大学土木与环境工程学院,新加坡,639798
: 2023-08-13。作者简介: 马潇驰(1998—),博士生
陆建(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(52072071)
网络首发:2024-05-10,
纸质出版:2024
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MA Xiaochi, LU Jian, HUO Zongxin, et al. A Risk Prediction Framework Based on Self-Organizing Mapping and Just-in-Time-Learning Considering Usability and Interpretability[J]. 2024, 58(5): 212-220.
马潇驰, 陆建, 霍宗鑫, 等. 考虑易用性和可解释性的自组织映射-即时学习风险预测框架[J]. 西安交通大学学报, 2024,58(5):212-220. DOI: 10.7652/xjtuxb202405020.
MA Xiaochi, LU Jian, HUO Zongxin, et al. A Risk Prediction Framework Based on Self-Organizing Mapping and Just-in-Time-Learning Considering Usability and Interpretability[J]. 2024, 58(5): 212-220. DOI: 10.7652/xjtuxb202405020.
为提高风险预测系统的易用性和可解释性
提出基于自组织映射网络(SOM)改进的即时学习(JITL)风险预测框架。首先
应用SOM对数据样本进行聚类
并对聚类特征进行解释。进而
通过基于聚类结果的样本选择算法构建待测数据的相似样本集
在线上调用作为基学习器的支持向量机(SVM)进行建模并输出风险预测结果。最后
采用一个交通事故数据集对风险模型的性能进行测试
检验其精度、易用性和可解释性。结果表明:采用SOM-JITL策略的SVM模型
受试者工作状况曲线面积指标达到0.720
相比不使用该策略的传统SVM模型提高17.5%
精度较高; SOM-JITL模型构建所需参数调节工作少
具有较好的易用性; 此外
SOM聚类结果准确识别出处于交通拥堵等高风险场景
与现实场景一致
具有可解释性。综上
SOM-JITL策略能有效提高基学习器的性能
达到精度、可解释性和易用性的平衡
有助于以低成本大规模推广风险预测系统。
To enhance the usability and interpretability of risk prediction system
a traffic risk prediction framework based on just-in-time learning(JITL)improved via self-organizing mapping(SOM)is proposed. Firstly
SOM is applied for clustering the data samples and interpreting the clustering features. Then
a sample selection algorithm based on clustering results is used to construct a similar sample set for the data to be tested
and the support vector machine(SVM)
which is the base learner
is invoked online to model and output the risk prediction results. Lastly
the model performance is tested using a traffic flow-crash dataset to evaluate interpretability and accuracy. The results show that the area under receiver operating characteristic curve of the SVM model using the SOM-JITL strategy reaches 0.720
which is 17.5% higher than that of the traditional SVM model without the strategy. The SOM-JITL requires less parameter adjustment
and has better usability. In addition
the clustering results of the SOM-JITL accurately identify high-risk scenarios
such as traffic congestion
which is consistent with realistic scenarios and has interpretability. In summary
the SOM-JITL can effectively enhance the performance of the base learner
and endow the model with balance among accuracy
interpretability and usability
facilitating the cost-effective and large-scale deployment of risk prediction systems.
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