Densely Connected Bidirectional LSTM with Applications to Sentence Classification

  • Zixiang Ding
  • Rui XiaEmail author
  • Jianfei Yu
  • Xiang Li
  • Jian Yang
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11109)


Deep neural networks have recently been shown to achieve highly competitive performance in many computer vision tasks due to their abilities of exploring in a much larger hypothesis space. However, since most deep architectures like stacked RNNs tend to suffer from the vanishing-gradient and overfitting problems, their effects are still understudied in many NLP tasks. Inspired by this, we propose a novel multi-layer RNN model called densely connected bidirectional long short-term memory (DC-Bi-LSTM) in this paper, which essentially represents each layer by the concatenation of its hidden state and all preceding layers hidden states, followed by recursively passing each layers representation to all subsequent layers. We evaluate our proposed model on five benchmark datasets of sentence classification. DC-Bi-LSTM with depth up to 20 can be successfully trained and obtain significant improvements over the traditional Bi-LSTM with the same or even fewer parameters. Moreover, our model has promising performance compared with the state-of-the-art approaches.


Sentence classification Densely connected Stacked RNNs 



The work was supported by the Natural Science Foundation of China (No. 61672288), and the Natural Science Foundation of Jiangsu Province for Excellent Young Scholars (No. BK20160085).


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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Zixiang Ding
    • 1
  • Rui Xia
    • 1
    Email author
  • Jianfei Yu
    • 2
  • Xiang Li
    • 1
  • Jian Yang
    • 1
  1. 1.School of Computer Science and EngineeringNanjing University of Science and TechnologyNanjingChina
  2. 2.School of Information SystemsSingapore Management UniversitySingaporeSingapore

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