Chinese Named Entity Recognition based on adaptive lexical weights

Abstract

Currently, many researchers use weights to merge self-matched words obtained through dictionary matching in order to enhance the performance of Named Entity Recognition (NER). However, these studies overlook the relationship between words and sentences when calculating lexical weights, resulting in fused word information that often does not align with the intended meaning of the sentence. Addressing above issue and enhance the prediction performance, we propose an adaptive lexical weight approach for determining lexical weights. Given a sentence, we utilize an enhanced global attention mechanism to compute the correlation between self-matching words and sentences, thereby focusing attention on crucial words while disregarding unreliable portions. Experimental results demonstrate that our proposed model outperforms existing state-of-the-art methods for Chinese NER of MRSA, Weibo, and Resume datasets.