Hi, I am a postdoctoral researcher working with  Prof. Dan Roth in the Department of Computer & Information Science, University of Pennsylvania. I completed my Ph.D. in Computer Science at Ludwig Maximilian University of Munich, and my advisor was  Prof. Hinrich Schütze. 

Research topic, deep learning in NLP, spans:
  • Representation Learning: Embedding language units and  graph data such as Freebase, WordNet etc.;
  • Relation Learning: textual entailment, paraphrase identification, answer selection, query-doc;
  • Question-Answeringmachine comprehension,  factoid QA against knowledge graphs.

In addition, some basic  machine learning issues also meet my taste: online learning, domain adaptation, zero/low-shot learning...

Released Resources:
1) FLORS: the state-of-the-art online POS tagger in domain adaptation scenario. It performs online representation learning (i.e., domain adaptation is performed by incrementally adapting word representations to the new domain). (EMNLP'2015)

2) Phrase embeddings: the first version in the world. It contains continuous linguistic phrases like "eye disease'' as well as discontinuous phrases like "turn...on'' etc. (ICLR'2013, ACL'2014)

3) Word Meta-Embeddings: A version of word embeddings which were derived by combining several pre-trained word embedding versions, such as word2vec, GloVe, C&W etc.  (ACL'2016)

Professional Activities:
  • PC member: NAACL'2016, ACL'2016, EMNLP'2016, CCL'2016, COLING2016, EACL2017, IJCAI'2017, ACL'2017, EMNLP'2017, CCL'2017, IJCNLP'2017, LREC'2018, NAACL'2018, IJCAI'2018, ACL'2018, COLING'2018
  • Organizing Co-Chairs: DASFAA 2014 International Workshop on Social Media Mining, Retrieval and Recommendation Technologies (SMR 2014).                                                     
Education Background:


Intern, IBM Watson, Yorktown Heights, NY USA,   March -- May 2016.

Honors and Awards:
  • Chinese Government Award for Outstanding Self-financed Students Abroad (国家优秀自费留学生奖学金), 2016
  • Baidu Fellowship, 2014 & 2015
  • Google Travel Grant for ACL2014
  • Best Paper Award in WISE'2013
  • National Scholarship, Chinese Ministry of Education, 2012 
  • Guanghua Scholarship, Peking University, 2012
  • Pacesetter of Outstanding Students, Peking University, 2012