[1]JIN Kanhui,YANG Tao,HUO Shuyi,et al.Research on Prediction Methods of Shear Strength of Rolled Clay Based on Different PSO-ELM Models[J].Research of Soil and Water Conservation,2022,29(03):213-219+227.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 03
Page number:
213-219+227
Column:
Public date:
2022-04-20
- Title:
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Research on Prediction Methods of Shear Strength of Rolled Clay Based on Different PSO-ELM Models
- Author(s):
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JIN Kanhui1, YANG Tao1, HUO Shuyi1, WANG Lei1, WANG Chengjie1, JIANG Yue1, ZHANG Huanling2
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(1.Hebei University of Water Resource and Electric Engineering & Hebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control, Cangzhou, HeBei 061000, China; 2.Tianjin Rail way Section of China Rail way Beijing Bureau Group CO., LTD, Tianjin 300011, China)
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- Keywords:
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rolled clay; shear strength; particle swarm optimization; extreme learning machine; activation function
- CLC:
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TU411.7
- DOI:
-
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- Abstract:
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The shear strength of rolled clay directly affects the quality and service life of roller compacted earth-rock dams. In order to obtain the optimal prediction model for the shear strength of rolled clay, we used particle swarm optimization to optimize the extreme learning machine model(PSO-ELM), which is based on the three activation functions of Sine function, radbas function and hardlim function to construct PSO-ELMsin, PSO-ELMrad and PSO-ELMhard. We compared the accuracy with ELM model, generalized regression neural network model(GRNN), random forest model(RF)and BP neural network model. The results show that: in the fitting results of cohesion and internal friction angle, the PSO-ELMsin model has the highest accuracy, and the slopes of the fitting equations are 1.005 and 1.032, respectively, which are closer to the standard value ‘1'; in the monthly simulation, the PSO-ELMsin model has the relative error of between 6.0% and 9.3%; RMSE, RRMSE and MAE of the PSO-ELMsin model in the conhesion simulation of the PSO-ELMsin model, the RMSE, RRMSE, MAE, Ens and R2 are 0.776 kPa, 1.80%, 0.641 kPa, 0.993 and 0.997, respectively. In the internal friction angle simulation, the RMSE, RRMSE, MAE, Ens and R2 are 1.635°, 6.98%, 1.616°, 0.983 and 0.998, respectively. The accuracy of PSO-ELMsin model ranks first. respectively. Therefore, the PSO-ELMsin model has the highest accuracy among all models and can be used as a precise model for predicting the shear strength of rolled clay.