Structure Discovery in Nonparametric Regression through Compositional Kernel Search
Structure Discovery in Nonparametric Regression through Compositional Kernel Search
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发表时间:
2013-02
期刊:
影响因子:
6.7
通讯作者:
D. Duvenaud;J. Lloyd;R. Grosse;J. Tenenbaum;Zoubin Ghahramani
中科院分区:
文献类型:
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作者:
D. Duvenaud;J. Lloyd;R. Grosse;J. Tenenbaum;Zoubin Ghahramani
Despite its importance, choosing the structural form of the kernel in nonparametric regression remains a black art. We define a space of kernel structures which are built compositionally by adding and multiplying a small number of base kernels. We present a method for searching over this space of structures which mirrors the scientific discovery process. The learned structures can often decompose functions into interpretable components and enable long-range extrapolation on time-series datasets. Our structure search method outperforms many widely used kernels and kernel combination methods on a variety of prediction tasks.