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Xu, Liefei (Lucy)
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PhD Candidate |
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I am a 5th-year PhD student in Stevens Institute of Technology, looking for job. My advisors are Prof. H. Quynh Dinh and Prof. Philippos Mordohai. I got BS and MS from Nanjing University, China. Then I worked in Lucent Technologies for 3 years and tasted some projects in wireless communication before came to Stevens.
| PhD in Computer Science, Stevens Institute of Technology, NJ, USA (GPA 4.0/4.0) |
Sept 2006 - present (Graduating May 2011) |
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M.S. in Computer Science, Nanjing University, Nanjing, P. R. China |
June 2003 |
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B.S. in Computer Science, Nanjing University, Nanjing, P. R. China |
June 2000 |
Computer Languages: |
C/C++, Matlab, Java, Python, SQL, Lex & Yacc, Foxpro, PASCAL |
Parallel Programming: |
GPU programming (CUDA), POSIX Thread programming |
| Graphics Libraries: | OpenGL |
| Operating System: | MS Windows , UNIX, Linux |
Others: |
Data Structures, Algorithms, Object-Oriented Programming, Pattern Recognition, Machine Learning |
| 1) | Liefei Xu, H.Quynh Dinh, Philippos Mordohai, Thomas Ramsay. "Detecting Patterns in Vector Fields". AIAA Aerospace Sciences Meeting, Orlando, Florida, USA, 4-7 January 2011. |
| 2) | Liefei Xu, Philippos Mordohai. "Automatic Facial Expression Recognition using Bags of Motion Words". British Machine Vision Conference (BMVC), Aberystwyth, Wales, UK, Aug 30 - Sep 2, 2010 (acceptance rate for poster presentations: 24.9%). PDF 0.8MB |
| 3) | Liefei Xu, H.Quynh Dinh, Eugene Zhang, Zhongzang Lin, Robert S. Laramee. "A Distribution-Based Approach for Tracking Points in Velocity Vector Fields". IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), Miami Beach , Florida, June 20-25, 2009 (acceptance rate for poster presentations: 22.1%). PDF 0.5MB Video 7MB |
| 4) | Liefei Xu and H.Quynh Dinh. "A Local Descriptor for Finding Corresponding Points in Vector Fields". The 19th International Conference on Pattern Recognition (ICPR), Tampa, Florida, USA, December 7-11, 2008 (acceptance rate for oral presentations: 18%). PDF 1.4MB |
| 5) | H.Quynh Dinh and Liefei Xu. "Measuring the Similarity of Vector Fields Using Global Distributions". The 12th International Workshop on Structural and Syntactic Pattern Recognition 7th International workshop on Statistical Pattern Recognition (S+SSPR), Orlando, Florida, USA, December 4-6, 2008 (acceptance rate for oral presentations: 32%). PDF 3.8MB |
| 6) | Xu Liefei, Zhao Hongjun, Kuang Haifeng, Cai Shijie. "A CSCD and Management System of Drawing-VHDrawings". Computer Engineering and Applications (in Chinese), Vol.39 No.23 2003 P210-P213. |
| 7) | Dou Wan-chun, Xi Xiao-peng, Xu Lie-fei, Cai Shi-jie. "Exception Handling Oriented Workflow Modeling and Its Performance". Chinese Journal of Computers (in Chinese), Vol.26 No.9 Sept.2003 P1094-P1103. |
| 8) | Jiang Hou-ming, Xu Lie-fei, Kuang Hai-feng, Cai Shi-jie. "Study On Auto-Input Technology in Engineering-Drawing Managing System". Application Research of Computers (in Chinese), 2004 Vol.21 No.4 P.80-81,142. |
Action Recognition, Facial Motion Analysis, Vector/Flow Field Analysis(clustering and matching), 3D Shape Matching |
Project Name |
Project Website |
Facial Expression Recognition |
Automatic Facial Expression Recognition using Bags of Motion Words |
| Vector Field Analysis | A Distribution-Based Approach to Tracking Points in Velocity Vector Fields |
| A Local Descriptor for Finding Corresponding Points in Vector Fields | |
| Measuring the Similarity of Vector Fields Using Global Distributions | |
| 3D Shape Matching | Shape Distribution |
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Aug.2003 - Aug.2006 |
3G Mobility (Nanjing) R&D Center, Lucent Technologies (China) |
Member of Technical Staff |
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Sep.2000 - Jul.2003 |
Nanda VH Software Intelligence Co.,Ltd |
Software Developer (part-time) |
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In Lucent Technologies (China):
| Automate Operational Fault Detection - Multi-Sector (OFD-MS) Threshold Setting Process |
Aug.2005 - Nov.2006 |
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OFD is a suite of software capabilities to monitor operations of the cell. It uses customer traffic to determine the operational health of a cell. OFD-MS is the principal OFD feature that detects hard faults on cell/sector/carrier. It needs to use some thresholds when determine if a fault is occuring or not. Originally, these thresholds are set by customer. It's a time-consuming work. With this feature, OFD-MS can automatically set the thresholds based on the statistical data. |
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With this feature, some new input commands and output reports need to be added into Technician Interface (TI) subsystem to maintain the new function of OFD-MS. My work was to finish the design, coding and development unit testing (DUT) of TI subsystem for this feature. |
| Capability to run Traffic Processing Unit - Command Line Interface (TPU-CLI) commands on Mobility Manager TI-CLI |
Feb.2005 - Nov.2005 |
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This feature is for integration of TPU-CLI with MM TI-CLI. This will allow TPU-CLI to be accessable from any TI-CLI interface. |
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My work was to finish the design, coding and DUT of TI subsystem for this feature. |
| Cell Operations, Administration & Maintenance (OA&M) Convergence for Mixed Networks |
Jul.2004 - Jun.2005 |
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This feature is to develop a fully integrated fault and configuration management interface for cell equipment in mixed networks that contain EV-DO only cells, CDMA only cells, and mixed EV-DO/CDMA cells. This interface will allow customers to more easily manage their mixed data/voice network. |
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TI is a very important part to provide such convergence interface. With DO convergence, the CDMA TI input commands will remain unchanged, and some new DO TI input commands will be added. And some new DO output reports will be added to support this feature. My work was to finish the design, coding and DUT of TI subsystem for this feature. |
| Automatic Message Accounting (AMA) Migration |
Aug.2003 - Jun.2005 |
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This feature is to relocate the AMA consolidation, storage, and management functionality from the Executive Cellular Processor (ECP) platform to the Flexent Mobility Manager (FMM) servers. |
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The AMA Migration feature was a long-lead feature spanning multiple releases and included substatial changes to input commands and output reports related to AMA. My work was to finish the design, coding and DUT of TI subsystem for this feature. |
In Nanda VH Software Intelligence Co.,Ltd
| VHDrawings |
Nov.2001 - Jul.2003 |
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VHDrawings is a CAD drawing management solution for any architectural and civil engineering design environment that works on DWG/DXF format CAD drawings. It applies a unique artificial intelligent drawing pattern recognition technology to automatically extract text information from CAD drawing files and store in a database. The system can then use the database to efficiently manage the drawing files. In order to enhance design team collaboration, the VHDrawings solution applies latest network technology to link all team members to a central server with hierarchy access rights, so that design process can be automated and streamlined. |
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My work was developing the interface module between client and server, the module of saving and geting DWG file from database using multithread method,the module of project plan management and the module of auto-recognizing the content of DWG file. |
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The VHDrawings1.0 was published in 2002. For project introduction, please refer to http://www.vhsoft.com/ |
| VHDocument |
Sep.2000 - Oct.2001 |
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VHDocument is a workflow-based document management system. It uses client/server pattern and COM/DCOM technology. It allows organizations to standardize and streamline time-consuming, people-based activities and track their progress. |
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My work is writing requirement analysis specification, designing the construction of the software and realizing some modules. |
ICPR2008 Student Travel Grant |
International Association of Pattern Recognition |
Dec, 2008 |
Outstanding Teaching Assistant Award |
Stevens Institute of Technology |
May, 2007 |
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The best reminiscent song |
1st KaraOK competition of Lucent Technologies (Nanjing) |
Oct.2004 |
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Champion |
Cross-Country Orienteering at NanShan Lake |
May.2004 |
Teaching Assistant of:
| Introduction to Scientific Computing | 2007, Fall | Stevens Institute of Technology |
| Data Structure and Algorithm II | 2007, Spring | Stevens Institute of Technology |
| Interactive Computer Graphics II | 2007, Spring | Stevens Institute of Technology |
| Data Structure and Algorithm II | 2006, Fall | Stevens Institute of Technology |
| Interactive Computer Graphics I | 2006, Fall | Stevens Institute of Technology |
Data Warehousing |
2001, Spring |
Nanjing University |
Projects in the courses I took or TAed, more details available here.
| Face Detection | Photometric Stereo | Find Circles | Detect Eyes | Raytracing | Animation | Bezier Patch | Transparent | Animation | Stack | Quicksort | AVL tree |
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Self-learnt Python, wrote a small script to download gif images from a given webpage: getimg You could download it and save it as a .py file.
Java Applet: Color Boxes. The webpage will show random colored boxes. Refesh the window to get different colors. Have fun!
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Last Modified: 2011-01-23
Education