Hei Chan

Post-Doctoral Research Associate

School of Electrical Engineering and Computer Science

College of Engineering

Oregon State University

Email: chanhe at eecs.oregonstate.edu

Office: 2049 Kelley Engineering Center

Office phone: (541) 737-4538

Recent Publications

*  Hei Chan, Alan Fern, Soumya Ray, Nick Wilson and Chris Ventura. Online Planning for Resource Production in Real-Time Strategy Games

[2007] Proceedings of the International Conference on Automated Planning & Scheduling (ICAPS)

Conference Paper

*  Hei Chan, Alan Fern, Soumya Ray, Nick Wilson and Chris Ventura. Extending Online Planning for Resource Production in Real-Time Strategy Games with Search

[2007] Proceedings of the ICAPS Workshop on Planning in Games

Workshop Paper

Dissertation

Title: Sensitivity Analysis of Probabilistic Graphical Models

Abbreviated abstract: The topic of sensitivity analysis of probabilistic graphical models, such as Bayesian networks, is concerned broadly with the relationships between local beliefs, such as network parameters, and global beliefs, such as values of probabilistic queries. This work addresses central research problems such as the assessment of global belief changes due to local belief changes, the identification of local belief changes that induce certain global belief changes, and the quantifying of belief changes in general. The results of this work can be applied to many areas, such as model debugging by tuning network parameters to enforce a user-imposed query constraint, information system design, and approximate reasoning.

Research at UCLA

*  Member of Automated Reasoning Group at UCLA, led by Professor Adnan Darwiche

*  Co-developer of SamIam (Sensitivity Analysis, Modeling, Inference and More), a Bayesian network reasoning engine coupled with a graphical user interface

*  Awarded the Year 2002 Prize by the Dimitris N. Chorafas Foundation, in recognition of research work on sensitivity analysis of Bayesian networks

Publications at UCLA

*  Hei Chan and Adnan Darwiche. When Do Numbers Really Matter?

[2001] Proceedings of the 17th Conference on Uncertainty in Artificial Intelligence (UAI)

[2002] Journal of Artificial Intelligence Research, volume 17

Journal paper; Conference paper

*  Hei Chan and Adnan Darwiche. A Distance Measure for Bounding Probabilistic Belief Change

[2002] Proceedings of the 18th National Conference on Artificial Intelligence (AAAI)

[2005] International Journal of Approximate Reasoning, volume 38

Journal paper; Conference paper

*  Hei Chan and Adnan Darwiche. On the Revision of Probabilistic Beliefs Using Uncertain Evidence

     [2003] Proceedings of the 18th International Joint Conference on Artificial Intelligence (IJCAI)

          [2005] Artificial Intelligence, volume 163

          Journal paper; Conference Paper

*  Hei Chan and Adnan Darwiche. Reasoning About Bayesian Network Classifiers

          [2003] Proceedings of the 19th Conference on Uncertainty in Artificial Intelligence (UAI)

          Conference Paper

*  Hei Chan and Adnan Darwiche. Sensitivity Analysis in Bayesian Networks: From Single to Multiple Parameters

          [2004] Proceedings of the 20th Conference on Uncertainty in Artificial Intelligence (UAI)

          Conference Paper

*  Hei Chan and Adnan Darwiche. Sensitivity Analysis in Markov Networks

[2005] Proceedings of the 19th International Joint Conference on Artificial Intelligence (IJCAI)

Conference Paper

*  Arthur Choi, Hei Chan, and Adnan Darwiche. On Bayesian Network Approximation by Edge Deletion

[2005] Proceedings of the 21st Conference on Uncertainty in Artificial Intelligence (UAI)

Conference Paper