Abstract
Novelty detection from multiple information sources is an important problem and selecting appropriate features is a crucial step for solving this problem. In this paper, we propose a novel data domain description algorithm which is inspired by multiple kernel learning and elastic-net-type constrain on the kernel weight. Most Multiple kernel learning algorithms employ the 1-norm constraints on the kernel combination weights, which enforce a sparsity solution but maybe lose useful information. In contrast, imposing the p-norm(p>1) constraint on the kernel weights will keep all the information in the base kernels, which lead to non-sparse solutions and brings the risk of being sensitive to noise and incorporating redundant information. To address this problem, we introduce an elastic-net-type constrain on the kernel weights. It finds the best trade-off between sparsity and accuracy. Furthermore, our algorithm facilitates the grouping effect. The proposed algorithm can be equivalently formalized as a convex-concave problem that can be effectively resolved with level method. Experimental results show that the proposed algorithm converges rapidly and demonstrate its efficiency comparing to other data description algorithms.
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Chen, X., Ma, Y., Chang, L., Chen, G. (2011). Variable Sparse Multiple Kernels Learning for Novelty Detection. In: Lee, G. (eds) Advances in Automation and Robotics, Vol.1. Lecture Notes in Electrical Engineering, vol 122. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25553-3_16
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DOI: https://doi.org/10.1007/978-3-642-25553-3_16
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