|Title:||Contribution à la méthode d'exploration Contextuelle. Applications au résumé Automatique et aux représentations Temporelles. Réalisation Informatique du système SERAPHIN.||Add Dissertation|
|Author:||Berri Jawad||Update Dissertation|
|Email:||click here to access email|
|Institution:||Université Paris Sorbonne - Paris IV, ISHA|
|Linguistic Subfield(s):||Computational Linguistics;|
J. P. Descles
|Abstract:||In this research, we present the contextual exploration (CE) method and its application to automatic abstracting and to temporal representations. The basic principle of the CE method focus the analysis on the linguistic expressions that are signifiant to resolve a specific problem. Expressions agree to a linguistic knowledge and are independant of a particular domain. Thus, for any processing of a text, the CE method uses firstly the linguistic knowledge.
As a solution for automatic abstracting, we implement the SERAPHIN system. This system extracts the most relevant sentences from a text for constituting an abstract that provide an idea of the whole content of a text. The extraction of sentences depends mainly on the indicators (which entice the attention of a reader) and the linguistic clues co-present in a giving context. SERAPHIN is implemented in the form of a knowledge based system. The processing of a text is based on a generic object model that represents the logical structure of a text. The aim of the abstract provided by SERAPHIN is to guide a user to read or not the whole text.
The SECAT system has been implemented as a solution to the problem of tense and aspect. The aim of the system is to find the aspectual semantic value of the grammatical morphems in a text. In the continuity of this work, we have proposed some solutions to construct a temporal representation of a text. In particular, we taken into account the agents and their interactions. This last constraints and manages the organisation of the situations denoted by a text. This way of looking is centralized on the agent, on its capacities and limitations, on its interactions with other agents, etc.