An Effective Approach for Chinese News Headline Classification Based on Multi-representation Mixed Model with Attention and Ensemble Learning

摘要

In NLPCC 2017 shared task two, we propose an efficient approach for Chinese news headline classification based on multi-representation mixed model with attention and ensemble learning. Firstly, we model the headline semantic both on character and word level via Bi-directional Long Short-Term Memory (BiLSTM), with the concatenation of output states from hidden layer as the semantic representation. Meanwhile, we adopt attention mechanism to highlight the key characters or words related to the classification decision, and we get a preliminary test result. Then, for samples with lower confidence level in the preliminary test result, we utilizing ensemble learning to determine the final category of the whole test samples by sub-models voting. Testing on the NLPCC 2017 official test set, the overall F1 score of our model eventually reached 0.8176, which can be ranked No. 3.