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AN ABDUCTIVE APPROACH TO DISCOURSE UNDERSTANDING USING TENSE AND OLD-NEW INFORMATION AND ITS APPLICATION TO NI-BASED TROUBLESHOOTERS

Research Project

Project/Area Number 05451160
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Intelligent informatics
Research InstitutionSOPHIA UNIVERSITY

Principal Investigator

ISHIKAWA Akira  SOPHIA UNIVERSITY,ENGLISH LANGUAE,PROFESSOR, 外国語学部, 教授 (10138373)

Co-Investigator(Kenkyū-buntansha) 植竹 洋一  東京商船大学, 商船学部, 助教授 (70193795)
Project Period (FY) 1993 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1993: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsABDUDTIVE REASONING / NATURAL LANGUAGE INTERFACE / DISCOURSE ANLYSIS / DISCOURSE REPRESENTATION THEORY16FA05 : DISCOURSE REFERENT / LABELLED DEDUCTIVE SYSTEM / ATMS / DIALOG GAMES / 対話ゲーム / 自然言語インターフェース / 対話管理 / テーマ・レ-マ / タイプ付ラムダ算法 / 対話指示対象
Research Abstract

This study has as its main goals the development of a reasoning system which can reflect tense and old-new information of NL discourse and its application to a practical troubleshooting system as a component of its NL interface. Although the study is at an end in terms of its assigned term, it has covered no more than the fundamentls of the workings of NL temporal expressions as viewed from the viewpoints of some of the most promising theories to be used in such a reasoning system. It has been established that in order for a machine to come close enough to NL inferencing to support reasnable man-machine dialogs, it is necessay for the reasoning procedure to take into account the discourse referents constantly introduced into the text and updated as the text unfolds. For management of discourse referents, several proposals have been considered to assess their strengths and weaknesses. The results of this assessment are summarised in our final report. Since discourse referent management … More involves several different modes of logical reasoning, the language to be used for such purposes should be rich in expressivity and easy to handle, Muskens' lambda-categonical language has received a higher rating in our appraisal in this connection over Kamp's original DRT.It has also been found out that temporal reasoning presupposes a method of extracting temporal information from NL expressions. No reasonable proposal has been made of an algorithmic method with which the temporal meaning of an expression can be compositionally deducible from that of its components. Ter Muellen's idea of relating the aspectual characteristics of phrases to the behavior of generalized quantifiers is favorably considered to support one way of developing the alogorithmic method though it is still in the stagee of a rough sketch. Our original ambition was to present a concrete instance of a algorithmic method treating tense and old-new information as reflected in the Japanese tensee system and the opposition of wa-ga and to turn it into a deductive system. As indicated above, the task remains to be undertaken in a future study. Less

Report

(4 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 石川 彰: "時間の構成を考慮した談話の時間構造の導出" 日本認知科学会第12回大会論文集. 86-87 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] N. Ogata 他: "Reference in Dialogues and Shared Belief Revision" Language, Information and Computation, Proceedings of the 10th Pacific Asia Conference. 205-214 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 石川彰,松沢忠幸,小松寿,緒方典裕: "指示タイプによる対話管理" 日本認知科学会第11回大会論文集. 160-161 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Komatsu,N.Ogata & A.Ishikawa: "Towards a Dynamic Theory of Belief-Sharing:in Cooporative Dialogues" Proceedings of COLING '94. 1164-1169 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Uetake: "A Formal Representation of Thematic-Rhematic Stoueture of Sentences Based on a Typed hambda.Calculus" Proceedings of COLING '94. 1105-1108 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Uetake: "The thematic-rhematic structure of natural languages meets constructive mathematics" Preprint of the 6th International Workshop on Open Systems and Information Dynamics,Copernicus Univ.Tourn,Poland. (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Uetake: "Adaptive Observer for Continuous Descriptive Systems" IEEE Transactions on Automatic Control. 39-10. 2095-2100 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Uetake: "A generalization of the Nehar:problem to multilinear operators" Preprint of Semester on Linear Operators,at S.Banach International Mathematical Center,Warsaw.April 1994. (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Uetake: "International Symposium on Japanology,Univ.of Warsaw,Nov.23-26 1994" The thematic-rhematic structure of a Japanese sentence An Approach to the Wa-ga problem, (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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