Ji Ma


2018

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State-of-the-art Chinese Word Segmentation with Bi-LSTMs
Ji Ma | Kuzman Ganchev | David Weiss
Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing

A wide variety of neural-network architectures have been proposed for the task of Chinese word segmentation. Surprisingly, we find that a bidirectional LSTM model, when combined with standard deep learning techniques and best practices, can achieve better accuracy on many of the popular datasets as compared to models based on more complex neuralnetwork architectures. Furthermore, our error analysis shows that out-of-vocabulary words remain challenging for neural-network models, and many of the remaining errors are unlikely to be fixed through architecture changes. Instead, more effort should be made on exploring resources for further improvement.

2017

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Natural Language Processing with Small Feed-Forward Networks
Jan A. Botha | Emily Pitler | Ji Ma | Anton Bakalov | Alex Salcianu | David Weiss | Ryan McDonald | Slav Petrov
Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing

We show that small and shallow feed-forward neural networks can achieve near state-of-the-art results on a range of unstructured and structured language processing tasks while being considerably cheaper in memory and computational requirements than deep recurrent models. Motivated by resource-constrained environments like mobile phones, we showcase simple techniques for obtaining such small neural network models, and investigate different tradeoffs when deciding how to allocate a small memory budget.

2016

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Generalized Transition-based Dependency Parsing via Control Parameters
Bernd Bohnet | Ryan McDonald | Emily Pitler | Ji Ma
Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)

2014

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Tagging The Web: Building A Robust Web Tagger with Neural Network
Ji Ma | Yue Zhang | Jingbo Zhu
Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)

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Punctuation Processing for Projective Dependency Parsing
Ji Ma | Yue Zhang | Jingbo Zhu
Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)

2013

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Easy-First POS Tagging and Dependency Parsing with Beam Search
Ji Ma | Jingbo Zhu | Tong Xiao | Nan Yang
Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)

2012

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NEU Systems in SIGHAN Bakeoff 2012
Ji Ma | LongFei Bai | Zhuo Liu | Ao Zhang | Jingbo Zhu
Proceedings of the Second CIPS-SIGHAN Joint Conference on Chinese Language Processing

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Easy-First Chinese POS Tagging and Dependency Parsing
Ji Ma | Tong Xiao | Jingbo Zhu | Feiliang Ren
Proceedings of COLING 2012

2010

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A Multi-stage Clustering Framework for Chinese Personal Name Disambiguation
Huizhen Wang | Haibo Ding | Yingchao Shi | Ji Ma | Xiao Zhou | Jingbo Zhu
CIPS-SIGHAN Joint Conference on Chinese Language Processing