测绘通报 ›› 2018, Vol. 0 ›› Issue (1): 157-160,164.doi: 10.13474/j.cnki.11-2246.2018.0031

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Optimization of Gaussian Process Model Based on Artificial Fish School Algorithm and Its Application Analysis

QIU Xiaomeng1,2, ZHOU Shijian3, WANG Fengwei4, OUYANG Liangyou1   

  1. 1. Faculty of Geomatics, East China University of Technology, Nanchang 330013, China;
    2. Key Laboratory of Watershed Ecology and Geographical Environment Monitoring, NASMG, Nanchang 330013, China;
    3. Nanchang Hangkong University, Nanchang 330063, China;
    4. College of Surveying and Geoinformatics, Tongji University, Shanghai 200092, China
  • Received:2017-04-19 Revised:2017-06-05 Online:2018-01-25 Published:2018-02-05

Abstract:

Based on the Gaussian process,the traditional conjugate gradient method is used to search the hyper-parameters, which has the disadvantages of strong dependence on the initial value and obtain local optimal solution. Artificial fish swarm algorithm is used to optimize the hyper-parameters intelligently, and the Gaussian process model based on the artificial fish swarm algorithm is used to predict and analysize the deformation of deformable body. Through the tunnel and foundation pit examples to compare the calculated results, NN kernel function is the best predictor of NN, SE and RQ, the average relative error is 0.69% and 1.06%. The results show that the prediction accuracy of the hyper-parameters optimization model are greatly improved, and the hyper-parameters solving of the Gaussian process algorithm themselves are improved and the effect is obvious.

Key words: artificial fish swarm algorithm, Gaussian process, rolling prediction method, deformation monitoring

CLC Number: