Nguyen Bach (Bạch Hưng Nguyên)
Graduate Research Assistant
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CONTACT INFORMATION

 

Language Technology Institute (Affiliated with interACT Research) School of Computer Science Carnegie Mellon University 407 South Craig Street, Pittsburgh, PA 15213, USA Email: x@y where x=nbach; y=cs.cmu.edu Phone: gif-uks-pihu

 

RESEARCH INTERESTS

• Machine Translation
• Natural language processing
• Speech recognition and synthesis
• Machine learning
• Information Retrieval

I am a PhD student working under the supervision of Prof. Alex Waibel and Prof. Stephan Vogel at CMU Statistical Machine Translation group. My current research is exploiting dependency structures from text and speech for statistical machine translation. I am working on GALE and TransTac projects.

PUBLICATIONS

2009

• Source-side Dependency Tree Reordering Models with Subtree Movements and Constraints
  Nguyen Bach, Qin Gao, Stephan Vogel
  In Proceedings of the 12th Machine Translation Summit (MT Summit XII), August 2009, Ottawa, Ontario, Canada. [Slides], [Bib], to appear.
  
  
• Cohesive Constraints in A Beam Search Phrase-based Decoder
  Nguyen Bach, Stephan Vogel and Colin Cherry
  In Proceedings of the North American Association for Computational Linguistics Human Language Technologies Conference (NAACL-HLT 2009), Boulder, CO, May/June 2009, USA. [Slides], [Bib].
  
  
• Incremental Adaptation of Speech-to-Speech Translation
  Nguyen Bach, Roger Hsiao, Matthias Eck, Paisarn Charoenpornsawat, Stephan Vogel, Tanja Schultz, Ian Lane, Alex Waibel and Alan W. Black
  In Proceedings of the North American Association for Computational Linguistics Human Language Technologies Conference (NAACL-HLT 2009), Boulder, CO, May/June 2009, USA. [Slides], [Bib].

2008

• Improving Word Alignment with Language Model Based Confidence Scores
  Nguyen Bach, Qin Gao, Stephan Vogel
  In Proceedings of the ACL 2008 Third Workshop on Statistical Machine Translation (ACL-08:HLT, WSMT), June 2008, Columbus, Ohio, USA. [Slides], [Bib], [MGIZA++].
  
  
• Recent Improvements in the CMU Large Scale Chinese-English SMT System
  Almut Silja Hildebrand, Kay Rottmann, Mohamed Noamany, Qin Gao, Sanjika Hewavitharana, Nguyen Bach and Stephan Vogel
  In Proceedings of the Annual Meeting of the Association for Computational Linguistics with the Human Language Technology Conference (ACL-08:HLT), June 2008, Columbus, Ohio, USA. [Slides], [Bib]

2007

• A Log-linear Block Transliteration Model based on Bi-Stream HMMs
  Bing Zhao, Nguyen Bach, Ian Lane and Stephan Vogel
  In Proceedings of the North American Association for Computational Linguistics Human Language Technologies Conference (NAACL-HLT 2007), pp 364-371, April 2007, Rochester, NY, USA. [Slides],[Bib],[Test set].
  
  
• The CMU TransTac 2007 Eyes-free and Hands-free Two-way Speech-to-Speech Translation System
  Nguyen Bach, Matthias Eck, Paisarn Charoenpornsawat, Thilo Kohler, Sebastian Stuker, ThuyLinh Nguyen, Roger Hsiao, Alex Waibel, Stephan Vogel, Tanja Schultz and Alan W. Black
  In Proceedings of the International Workshop on Spoken Language Translation(IWSLT-2007), October 2007, Trento, Italy. [Slides], [Bib].
  
  
• Handling OOV Words in Arabic ASR Via Flexible Morphological Constraints
  Nguyen Bach, Mohamed Noamany, Ian Lane and Tanja Schultz
  In Proceedings of the INTERSPEECH (Interspeech-2007), August 2007, Antwerp, Belgium. [Slides],[Bib].
  
  
• The CMU-UKA Statistical Machine Translation Systems for IWSLT 2007
  Ian Lane, Andreas Zollmann, ThuyLinh Nguyen, Nguyen Bach, Ashish Venugopal, Stephan Vogel, Kay Rottmann, Ying Zhang and Alex Waibel
  In Proceedings of the International Workshop on Spoken Language Translation (IWSLT-2007), October 2007, Trento, Italy. [Slides], [Bib].

2006

• A Log-linear Block Transliteration Model based on Bi-Stream HMMs
  Bing Zhao, Nguyen Bach, Ian Lane and Stephan Vogel
  T.R. CMU-LTI-06-007, Carnegie Mellon University, Pittsburgh, PA, Fall 2006.
  
  
• The UKA/CMU Statistical Machine Translation System for IWSLT 2006
  Matthias Eck, Ian Lane, Nguyen Bach, Sanjika Hewavitharana, Muntsin Kolss, Bing Zhao, Almut Silja Hildebrand, Stephan Vogel and Alex Waibel
  In Proceedings of the International Workshop on Spoken Language Translation (IWSLT-2006), pp 130-137, November 2006, Kyoto, Japan. [Slides], [Bib]

Before 2005

• Quantitative Analysis and Synthesis of Syllabic Tones in Vietnamese
  Hansjoerg Mixdorff, Nguyen Hung Bach, Hiroya Fujisaki and Mai Chi Luong
  In Proceedings of the EUROSPEECH (Eurospeech-2003), pp 177 - 180, Sep 2003, Geneva, Switzerland.
  
  
• Analysis F0 Contours Using the Fujisaki model for Vietnamese Tones
  Bach Hung Nguyen and Nguyen Tien Dung
  In Proceedings of the National Informatics Conference, Thai Nguyen, Vietnam, 2003.
  
  
• Application of Dynamic Time Warping Algorithm for the Recognition of Vietnamese Isolated Words
  Bach Hung Nguyen and Luong Chi Mai
  In Journal of Science and Technology, N.5, 2002, Vietnam.

TALKS

• Qin Gao, Alok Parlikar, Nguyen Bach, and Stephan Vogel, 'Statistical Machine Translation: Parallel Processing for Large Data Situations,' Intel Research Pittsburgh Open House 2008, October 2008, Pittsburgh, PA, USA. [PDF]
• Simulating Sentence Pairs Sampling Process via Source and Target Language Models, MT Lunch, April 2008, Carnegie Mellon University
• Translating Words You've Never Seen , Student Research Symposium 2006, Language Technologies Institute, Carnegie Mellon University

 

IMPLEMENTATIONS – UNPUBLISHED REPORTS

• Translate Arabic OOV words by Transformation Transliteration Rules , March 2006, Carnegie Mellon University [available inside CMU]
• N. Bach, ' MetaShopper - a preliminary study and implementation ', May 2004, Johns Hopkins University
  You can try the implementation here VeryNaiveBookCrawler
• N. Bach, S. Reddy, 'A preliminary quantitative study on the characteristics of Vietnamese vowels and English vowels', May 2004, Johns Hopkins University
• A random sentence generator. Each time you run the generator; it reads the context-free grammar from a file and prints one or more random sentences. This small program was done in September 2003 and updated June 2004. You can try it here: 10 English sentences or 10 Vietnamese sentences with Nguyen_Binh's style
• A text classifier. The program uses 2 training corpora. They can be spam and not-spam or English and Spanish. Given an email the program classifies it to a training group. So for spam detector, the email is determined whether it is spam or not-spam. For language identification, the email is determined whether it is written in English or Spanish. By using smoothing techniques the error rate sharply decreases. I tried uniform, add-lambda, add-lambda backoff, and Witten-Bell backoff.

Nguyen Bach

Last modified: April 1, 2009