数据库扫描
计算机科学
聚类分析
随机森林
数据挖掘
相似性(几何)
人工智能
模式识别(心理学)
噪音(视频)
机器学习
图像(数学)
相关聚类
CURE数据聚类算法
作者
Xianlei Fu,Liuyang Feng,Limao Zhang
标识
DOI:10.1016/j.asoc.2022.108686
摘要
This study proposed a hybrid approach that integrates supervised and unsupervised learning to estimate the tunnel boring machine (TBM) performance in soft soil under limited geological information. By combining the shared nearest neighbor (SNN) algorithm and the density-based spatial clustering of applications with the noise (DBSCAN) method, an unsupervised learning approach, SNN-DBSCAN method, is performed to extract useful knowledge from the TBM logged data. The supervised random forest (RF) method is further combined with the SNN-DBSCAN method to predict the key TBM performance indicator. A realistic mass rapid transit (MRT) project in Singapore is adopted to examine the efficiency of the proposed methodology. The results from this case study indicate that: (1) The proposed SNN-DBSCAN method is suitable to perform data mining tasks on TBM logged data as the clustering result has an average of 85.03% similarity with site observation; (2) The knowledge extracted from the proposed approach could assist on soil identification as well as operational parameters determination; (3) Compared to the conventional RF method, the proposed approach achieves a high prediction accuracy with the coefficient of determination ( R 2 ) increasing from 0.78 to 0.92. • A data-driven prediction approach to estimate TBM performance in soft soils is proposed. • An unsupervised learning method, SNN-DBSCAN, is used to perform clustering analysis. • Corresponding random forest (RF) models are built to conduct prediction in different clusters. • A realistic tunnel case in Singapore is used to demonstrate its applicability and effectiveness. • It achieves an average improvement of 39% in MAE and 37% in RMSE compared to pure RF.
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