在线教育场景下的智能客服系统 Keqing He, Hong Xu, Sihong Liu, Yuanmeng Yan, Zijun Liu Jan 1, 0001 Keqing He Postgraduate Student Dialogue System, Summarization, Pre-training Language Model Hong Xu Postgraduate Student Natual Language Processing, Intent Detection Sihong Liu Postgraduate Student Dialogue system, Policy learning Yuanmeng Yan Postgraduate Student Spoken Language Understanding, Pre-training Language Model Zijun Liu Postgraduate Student Task-oriented Dialogue System