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A single-objective EPR based model for creep index of soft clays considering L2 regularization
Yin-Fu Jin1; Zhen-Yu Yin1; Wan-Huan Zhou2; Jian-Hua Yin1; Jian-Fu Shao3
Source PublicationEngineering Geology

A correlation of creep index (Cα) with high performance is highly recommended for soft clay engineering practice. Current empirical correlations are only acceptable for a few clays. This paper aims to propose a robust and effective evolutionary polynomial regression (EPR) model for Cα of clay. First, a database covering various clays is formed, in which 120 data are randomly selected for training and the remaining data are used for testing. To avoid overfitting, a novel EPR procedure using a newly enhanced differential evolution (DE) algorithm is proposed with two enhancements: (1) a new fitness function is proposed using the structural risk minimization (SRM) with L2 regularization that penalizes polynomial complexity, and (2) an adaptive process for selecting the combination of involved variables and size of polynomial terms is incorporated. By comparing the predictive ability, model complexity, robustness and monotonicity, the EPR formulation for Cα involving clay content, plasticity index and void ratio with three terms is selected as the optimal model. A parametric study is then conducted to assess the importance of each input in the proposed model. All results demonstrate that the proposed model of Cα is simple, robust, and reliable for applications in engineering practice.

KeywordSoft Clays Atterberg Limits Creep Optimization Evolutionary Polynomial Regression Model Selection
URLView the original
Indexed BySCIE
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000458220900021
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Cited Times [WOS]:40   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorZhen-Yu Yin
Affiliation1.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China
3.University of Lille, CNRS, Centrale Lille, FRE 2016 – LaMcube – Laboratoire de mécanique multiphysique multiéchelle, F-59000 Lille, France
Recommended Citation
GB/T 7714
Yin-Fu Jin,Zhen-Yu Yin,Wan-Huan Zhou,et al. A single-objective EPR based model for creep index of soft clays considering L2 regularization[J]. Engineering Geology,2019,248:242-255.
APA Yin-Fu Jin,Zhen-Yu Yin,Wan-Huan Zhou,Jian-Hua Yin,&Jian-Fu Shao.(2019).A single-objective EPR based model for creep index of soft clays considering L2 regularization.Engineering Geology,248,242-255.
MLA Yin-Fu Jin,et al."A single-objective EPR based model for creep index of soft clays considering L2 regularization".Engineering Geology 248(2019):242-255.
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