Relation classification via BERT with piecewise convolution and focal loss

• Jianyi Liu,

  Roles Conceptualization, Writing – original draft, Writing – review & editing

  Affiliation School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing, China

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• Xi Duan,

  Roles Methodology, Writing – original draft

  Affiliation School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing, China

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• Ru Zhang ,

  Roles Conceptualization, Writing – original draft

  * E-mail: zhangru@bupt.edu.cn

  Affiliation School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing, China

  https://orcid.org/0000-0001-6641-3236

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• Youqiang Sun,

  Roles Data curation, Writing – original draft, Writing – review & editing

  Affiliation School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing, China

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• Lei Guan,

  Roles Investigation

  Affiliation School of Electrical Engineering, Tsinghua University, Beijing, China

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• Bingjie Lin

  Roles Investigation

  Affiliation State Grid Information and Telecommunication Branch, Beijing, China

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