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In this paper, we present a collaborative learning environment mediatized on the Internet. For its design, we take into account all the components intervening in the interaction and collaboration process and we propose an approach guided by ontologies (domain and application). The objective of this work is to allow multiple users (learners, teachers, administrators, managers, etc.) to interact collectively...
Context-aware query aims to make the user get suitable query results based on the users' contexts. When a user as a leader or a representative issues a query, s/he often needs to consider a group of people. To this end, context-aware database should meet most of the people's contexts in this situation. In this paper, we propose an approximation algorithm to compute context-aware group top-k query...
This paper proposes an approach based on graph isomorphism to find the correspondence in relational matching. We describe a pseudo-automorphism group as Pseudo-aut (G) of a graph G, which is a set of all pseudo-automorphisms of G. We discuss some properties of the Pseudo-aut(Cn) and the relationships between various elements, establish the relationship between the pseudo-isomorphic and the perfect...
For the decision making problems, weights reflect index's comparatively importance. Their values directly decide the correctness of decision making results. Weights possess fuzzy and uncertain characteristics. Meanwhile their values are confirmed by decision-makers' experiences and purposes. Usually decision makers are willing or able to provide interval information, because of lack of knowledge or...
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