Towards Hybrid-grained Feature Interaction Selection for Deep Sparse Network

Xue Liu, Chen Ma, Liang Chen, Fuyuan Lyu, Xing Tang, Dugang Liu, Weihong Luo, Xiuqiang He

arXiv · PDF · Open in the Atlas

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Abstract

Deep sparse networks are widely investigated as a neural network architecture for prediction tasks with high-dimensional sparse features, with which feature interaction selection is a critical component. While previous methods primarily focus on how to search feature interaction in a coarse-grained space, less attention has been given to a finer granularity. In this work, we introduce a hybrid-grained feature interaction selection approach that targets both feature field and feature value for deep sparse networks. To explore such expansive space, we propose a decomposed space which is calculated on the fly. We then develop a selection algorithm called OptFeature, which efficiently selects the feature interaction from both the feature field and the feature value simultaneously. Results from experiments on three large real-world benchmark datasets demonstrate that OptFeature performs well in terms of accuracy and efficiency. Additional studies support the feasibility of our method. All source code are publicly available 1 .

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