Abstract
The displacement at various measurement points is a critical indicator that can intuitively reflect the operational properties of a dam. It is important to analyse displacement monitoring data in a timely manner and make reliable predictions of dam safety. This paper proposes a GPR-based model for dam displacement forecasting. The input variables of the monitoring model consider hydraulic factors, thermal factors and irreversible factors, and the output variables are the observed displacements of the dam. An example analysis based on the proposed method is performed on a prototype gravity dam, and the performance of different simple/combined covariance functions is investigated to obtain the optimal choice. Compared to multiple linear regression, radial basis function network (RBFN) and support vector machine (SVM) methods, the results indicate that the GPR-based model with a combined covariance function significantly improves the prediction accuracy. The proposed model can effectively overcome the over-learning and poor robustness issues of approaches such as RBFN and SVM. In addition, the GPR-based forecasting model has the advantages of simplicity in the training process and the capacity to provide a probabilistic output.
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- AANN:
-
Auto-associative neural network
- AI:
-
Artificial intelligence
- ANN:
-
Artificial neural network
- BP:
-
Back propagation
- CI:
-
Confidence interval
- FEM:
-
Finite element method
- GP:
-
Gaussian process
- GPR:
-
Gaussian process regression
- HTT:
-
Hydrostatic-thermal-time model
- HST:
-
Hydrostatic-season-time model
- IP:
-
Inverted plumb lines
- LINone:
-
Linear with a bias covariance function
- MAE:
-
Mean absolute error
- MAXE:
-
Maximum absolute error
- ML:
-
Machine learning
- MLR:
-
Multiple linear regression
- NARX:
-
Nonlinear autoregressive exogenous model
- NN:
-
Neural network
- NNone:
-
Neural network covariance function
- PLS:
-
Partial least squares regression
- prodNS:
-
NNone * SEiso
- prodRN:
-
RQiso * NNone
- prodRS:
-
RQiso * SEiso
- R 2 :
-
Determination coefficient
- RBFN:
-
Radial basis function network
- RCCD:
-
Roller-compacted concrete dam
- RMSE:
-
Root mean square error
- RQiso:
-
Rational quadratic covariance function with an isotropic distance measure
- RUL:
-
Remaining useful life
- SEiso:
-
Squared exponential covariance function with isotropic distance measure
- SR:
-
Stepwise regression
- sumRQ:
-
RQiso + SEiso
- sumNS:
-
NNone + SEiso
- sumRN:
-
RQiso + NNone
- SVM:
-
Support vector machine
- SVR:
-
Support vector regression
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Acknowledgements
This research has been greatly supported by the National Key Research and Development Plan (No. 2018YFC0407102). Project of the research on long term monitoring and safety evaluation of concrete dams based on BIM (DJ-ZDXM-2018-02).
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Lin, C., Li, T., Chen, S. et al. Gaussian process regression-based forecasting model of dam deformation. Neural Comput & Applic 31, 8503–8518 (2019). https://doi.org/10.1007/s00521-019-04375-7
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DOI: https://doi.org/10.1007/s00521-019-04375-7