Time Series Prediction Method Based on LS-SVR with Modified Gaussian RBF
- Cite this paper as:
- Guo Y., Li X., Bai G., Ma J. (2012) Time Series Prediction Method Based on LS-SVR with Modified Gaussian RBF. In: Huang T., Zeng Z., Li C., Leung C.S. (eds) Neural Information Processing. ICONIP 2012. Lecture Notes in Computer Science, vol 7664. Springer, Berlin, Heidelberg
LS-SVR is widely used in time series prediction. For LS-SVR, the selection of appropriate kernel function is a key issue, which has a great impact with the prediction accuracy. Compared with some other feasible kernel functions, Gaussian RBF is always selected as kernel function due to its good features. As a distance functions-based kernel function, Gaussian RBF also has some drawbacks. In this paper, we modified the standard Gaussian RBF to satisfy the two requirements of distance functions-based kernel functions which are fast damping at the place adjacent to the test point and keeping a moderate damping at infinity. The simulation results indicate preliminarily that the modified Gaussian RBF has better performance and can improve the prediction accuracy with LS-SVR.
KeywordsLeast squares support vector regression (LS-SVR) Gaussian RBF Time series prediction
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