Puyang Xu 徐朴旸
PhD Candidate, Dept. of ECE
puyangxu at jhu edu

  About Me:

I defended in Oct. 2012! Since Nov. 2012, I have been with Microsoft as a scientist working on spoken language understanding.

I was a PhD student working with Prof. Sanjeev Khudanpur.

I got my B.S. degree in acoustics from Nanjing University, China, in 2006.

  Research Interests:

My thesis focuses on language modeling for speech recognition. I try to build novel language models that beat standard n-gram and also scale up well to large datasets. In general, I'm interested in machine learning techniques for text processing.


Puyang Xu, Ruhi Sarikaya, Targeted Feature Dropout for Robust Slot Filling in Natural Language Understanding, in Interspeech 2014.

Jean-Philippe Robichaud, Paul A. Crook, Puyang Xu, Omar Zia Khan, Ruhi Sarikaya, Hypotheses Ranking for Robust Domain Classification And Tracking in Dialogue Systems, in Interspeech 2014.

Puyang Xu, Ruhi Sarikaya, Contextual Domain Classification in Spoken Language Understanding Systems Using Recurrent Neural Network, in ICASSP 2014.

Puyang Xu, Ruhi Sarikaya, Convolutional Neural Network Based Triangular CRF for Joint Intent Detection and Slot Filling, in IEEE ASRU 2014. (Best Paper Award)

Puyang Xu, Ruhi Sarikaya, Exploiting Shared Information for Multi-intent Natural Language Sentence Classification, in Interspeech 2013.

Puyang Xu, Brian Roark, and Sanjeev Khudanpur, Phrasal Cohort Based Unsupervised Discriminative Language Modeling, in Interspeech 2012.

Puyang Xu, Sanjeev Khudanpur, et al. Continuous Space Discriminative Language Modeling, in ICASSP 2012.

Kenji Sagae, et al., Hallucinated N-best Lists for Discriminative Language Modeling, in ICASSP 2012.

Arda Celebi, et al., Semi-Supervised Discriminative Language Modeling for Turkish ASR, in ICASSP 2012.

Asela Gunawardana, Chris Meek, and Puyang Xu, A Model for Temporal Dependencies in Event Streams, in NIPS 2011.

Puyang Xu, Sanjeev Khudanpur, and Asela Gunawardana, Randomized Maximum Entropy Language Models, in IEEE ASRU 2011.

Puyang Xu, Asela Gunawardana, and Sanjeev Khudanpur, Efficient Subsampling for Training Complex Language Models, in Empirical Methods in Natural Language Processing, 2011.

Puyang Xu, Damianos Karakos, Sanjeev Khudanpur, Self-supervised Discriminative Training of Statistical Language Models, IEEE ASRU 2009.

Werner Spiegl, et al. Analyzing Features for Automatic Age Estimation on Cross-Sectional Data, in Interspeech 2009.

Kai Chen, Puyang Xu, Jing Lu and Boling Xu, An Improved Poster-filter of Acoustic Echo Canceller Based On Subband Implementation, Applied Acoustic, Volume 70, Issue 6, June 2009.

  Other Interests:

Basketball, Piano, Chinese Caligraphy

The Center for Language and Speech Processing
The Johns Hopkins University
CSEB 225
3400 North Charles Street
Baltimore, MD 21218
* Telephone: (410) 516-7052 * Fax: (410) 516-5050 * E-mail: puyangxu at jhu.edu
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