Benjamin Han

Learn More
To discriminate among all possible diagnoses using Hou's theory of measurement in diagnosis from first principles, one has to derive all minimal conflict sets from a known conflict set. However, the result derived from Hou's method depends on the order of node generation in CS-trees. We develop a derivation method with mark set to overcome this drawback of(More)
Automatic extraction and reasoning over temporal properties in natural language discourse has not had wide use in practical systems due to its demand for a rich and compositional, yet inference-friendly, representation of time. Motivated by our study of temporal expressions from the Penn Treebank corpora, we address the problem by proposing a two-level(More)
Finding useful information from large multimodal document collections such as the WWW without encountering numerous false positives poses a challenge to multimodal information retrieval systems (MMIR). A general model for multi-modal information retrieval is proposed by which a user's information need is expressed through composite, multi-modal queries, and(More)
To fully discriminate among all possible diagnoses in a fault diagnosis task, one needs to take measurements from the system being diagnosed. The primary e€ects of taking one measurement in diagnosis based on ®rst principles were presented in A. Reiter [Arti®cial Intelligence (32) (1987) 57±95] and a more detailed, formal account was given in A. Hou(More)