Yijia Liu (刘一佳)
Natural language processing, Chinese Word Segmentation, parsing and machine learning. My supervisor is Wanxiang Che.
Ph.D. candidate, Harbin Institute of Technology2014.9 - present
Major: Computer Science
Visiting Student, University of Washington2016.10 - 2017.9
Supervisor: Noah A. Smith
M.S., Harbin Institute of Technology2012.9 - 2014.7
Major: Computer Science
B.E., Harbin Institute of Technology2008.9 - 2012.7
Major: Computer Science
Yijia Liu, Wanxiang Che, Huaipeng Zhao, Bing Qin, and Ting Liu. 2018. Distilling Knowledge for Search-based Structured Prediction. In Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics (ACL). | [code for parser] | [code for NMT]
Yijia Liu, Wanxiang Che, Bo Zheng, Bing Qin, and Ting Liu. 2018. An AMR Aligner Tuned by Transition-based Parser. (to appear) In Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing (EMNLP).
Yijia Liu, Yi Zhu, Wanxiang Che, Bing Qin, Nathan Schneider, and Noah A. Smith. 2018. Parsing Tweets into Universal Dependency. In Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (NAACL). | [code] | [data]
Wanxiang Che, Yijia Liu, Yuxuan Wang, Bo Zheng, and Ting Liu. 2018. Towards Better UD Parsing: Deep Contextualized Word Embeddings, Ensemble, and Treebank Concatenation. (to appear) In Proceedings of the CoNLL 2018 Shared Task: Multilingual Parsing from Raw Text to Universal Dependencies (CoNLL). | [shared-task results]
Yutai Hou, Yijia Liu, Wanxiang Che and Ting Liu, 2018. Sequence-to-Sequence Data Augmentation for Dialogue Language Understanding. In Proceedings of the 27th International Conference on Computational Linguistics (COLING). | [code]
Haoyang Wen, Yijia Liu, Wanxiang Che, Libo Qin and Ting Liu, 2018. Sequence-to-Sequence Learning for Task-oriented Dialogue with Dialogue State Representation. In Proceedings of the 27th International Conference on Computational Linguistics (COLING).
Yijia Liu, Wanxiang Che, Jiang Guo, Bing Qin, and Ting Liu. 2016. Exploring Segment Representations for Neural Segmentation Models. In Proceedings of 25th International Joint Conference on Artificial Intelligence (IJCAI). | [code]
Yijia Liu, Yue Zhang, Wanxiang Che, and Ting Liu. 2014. Domain Adaptation for CRF-based Chinese Word Segmentation using Free Annotations. In Proceedings of the 2014 Conference on Empirical Methods in Natural Language Processing (EMNLP). | [bib] | [code]
Yijia Liu, Wanxiang Che, and Ting Liu. 2013. Enhancing chinese word segmentation with character clustering. In Chinese Computational Linguistics and Natural Language Processing Based on Naturally Annotated Big Data (CCL).
Meishan Zhang, Wanxiang Che, Yijia Liu, Zhenghua Li, Ting Liu. 2012. HIT dependency parsing: Bootstrap aggregating heterogeneous parsers. In Notes of the First Workshop on Syntactic Analysis of Non-Canonical Language (SANCL). | [shared-task results]
CoNLL 2018 Shared Task: Multilingual Parsing from Raw Text to Universal Dependencies, 2018.4 - 2018.6Our system (HIT-SCIR) was ranked first out of 26 submitted systems according to LAS.
- contributed the ideas of using deep contextualized word embeddings and ensemble
- developed the treebank concatenation strategies.
Language Technology Platform (LTP), 2013.6 - presentLTP is a software package that provides a Chinese natural language processing pipeline along with web service API.
- one of the developers and the major maintainer of LTP.
- developed 4 modules including Chinese word segmentation, POSTagging, NER and Dependency parsing in a perceptron algorithm framework.
- developed the RESTful API and contributed to the development of website.
Conference Reviewer/Secondary Reviewer: ACL 2014, CCL 2015, NLPCC 2015, NAACL 2016, IJCAI 2016, SemEval 2016, ACL 2018.
Research Assistance, Singapore University of Technology and Design. 2013.10 - 2014.10worked with Dr. Yue Zhang, on statistical machine translation, Chinese tagging and transition based dependency parsing.
Intern Researcher and Developer, Baidu Inc., NLP Department. 2011.7 - 2011.11implemented query template extraction toolkit and built a python extension for baidu wordseg library.
TA, High level Programming Language, 2009 fall, 2010 fall
TA, The Practice of Programming, 2011 spring, 2012 spring
Programming Languages: C, C++, Python, R, Shell, PHP, Java
Operating Systems: Linux (two-years experience as part-time IT administrator)
Experience: Git, SVN, Valgrind, Apache, Nginx, django (Python)
First Class Award in HeiLongJiang Provincial Science and Technology Prizes: The Language Technology Platform and its Applications 2016.9
Hua Wei Scholarship (for graduate student) 2016.9
The National Scholarship for graduate students 2013.9
2010 ACM/ICPC Asia Regional Contest Hangzhou Onsite, Silver Medal 2010.10
Hua Wei Scholarship (for undergraduate student) 2010.9