Mining the Weights Knowledge for Optimizing Neural Network Structures

• URL: http://arxiv.org/abs/2110.05954v1
• Date: Mon, 11 Oct 2021 05:20:56 GMT
• Title: Mining the Weights Knowledge for Optimizing Neural Network Structures
• Authors: Mengqiao Han, Xiabi Liu, Zhaoyang Hai, Xin Duan
• Abstract summary: We introduce a switcher neural network (SNN) that uses as inputs the weights of a task-specific neural network (called TNN for short) By mining the knowledge contained in the weights, the SNN outputs scaling factors for turning off neurons in the TNN. In terms of accuracy, we outperform baseline networks and other structure learning methods stably and significantly.
• Score: 1.995792341399967
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Knowledge embedded in the weights of the artificial neural network can be used to improve the network structure, such as in network compression. However, the knowledge is set up by hand, which may not be very accurate, and relevant information may be overlooked. Inspired by how learning works in the mammalian brain, we mine the knowledge contained in the weights of the neural network toward automatic architecture learning in this paper. We introduce a switcher neural network (SNN) that uses as inputs the weights of a task-specific neural network (called TNN for short). By mining the knowledge contained in the weights, the SNN outputs scaling factors for turning off and weighting neurons in the TNN. To optimize the structure and the parameters of TNN simultaneously, the SNN and TNN are learned alternately under the same performance evaluation of TNN using stochastic gradient descent. We test our method on widely used datasets and popular networks in classification applications. In terms of accuracy, we outperform baseline networks and other structure learning methods stably and significantly. At the same time, we compress the baseline networks without introducing any sparse induction mechanism, and our method, in particular, leads to a lower compression rate when dealing with simpler baselines or more difficult tasks. These results demonstrate that our method can produce a more reasonable structure.

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