Data Set Used
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)
Understanding temporal expressions in natural language is a key step towards incorporating temporal information in many applications. In this paper we describe a system capable of anchoring such expressions in English: system TEA features a constraint-based calendar model and a compact representational language to capture the inten-sional meaning of… (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)
Recent years have seen increasing research on extracting and using temporal information in natural language applications. However most of the works found in the literature have focused on identifying and understanding temporal expressions in newswire texts. In this paper we report our work on anchoring temporal expressions in a novel genre, emails. The… (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 eects 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)
Current corpus-based machine translation systems usually require significant amount of parallel text to build a useful bilingual dictionary for translation. To alleviate this data dependency I propose a novel approach based on genetic algorithms to improve translations by fusing different linguistic hypotheses. A preliminary evaluation is also reported.