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Knowledge engineering in the sourcing domain for the recommendation of providers

Molka Tounsi Dhouib 1, 2, 3
Abstract : This CIFRE doctoral thesis is part of a collaborative research project between the I3S laboratory of the University of Côte d'Azur and the Silex company, and addresses the field of recommendation systems. Silex is a start-up that develops a Software-as-a-Service sourcing tool that allows companies to provide a description of their professional activities, their offers and/or the services they are looking for in natural language (currently French).In this context, the objective of this thesis is to propose a decision support system by exploiting the semantic knowledge that are extracted from the textual descriptions of requests for services and providers, in order to recommend relevant providers for a service request.The contributions of this thesis are the following. First, we proposed a vocabulary for the sourcing field by reusing and integrating existing vocabularies, in order to semantically annotate the textual descriptions of providers and requests for services. Second, we proposed an automatic alignment method to establish the correspondence between different concepts of the considered vocabularies. This approach is based on rules exploiting embedding space and measurements on groups of labels to discover the relationships between concepts. Third, we proposed an algorithm for extracting named entities from the textual descriptions of service requests and providers, and an algorithm for semantic annotation of these descriptions, based on the linking of the extracted entities with the concepts of the defined vocabulary.Fourth, we proposed a provider recommendation algorithm that exploits these knowledges extracted.Finally, we studied the contribution of using ontological knowledge to improve our decision support system for the sourcing domain in order to recommend relevant providers for a service request.The contributions of this thesis are the following. First, we proposed a vocabulary for the sourcing field in order to semantically annotate the textual descriptions of providers and requests for services. This vocabulary was built by reusing and integrating existing vocabularies. Second, we proposed an automatic alignment method to establish the correspondence between different concepts of the considered vocabularies. This approach is based on rules exploiting embedding space and measurements on groups of labels to discover the relationships between concepts. Third, we proposed an algorithm for extracting named entities from the textual descriptions of service requests and providers, and an algorithm for semantic annotation of these descriptions, based on the linking of the extracted entities with the concepts of the defined vocabulary.Fourth, we proposed a provider recommendation algorithm that exploits these knowledge extracted.Finally, we studied the contribution of using ontological knowledge to improve our decision support system for the sourcing domain.
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Submitted on : Tuesday, September 7, 2021 - 10:36:10 AM
Last modification on : Wednesday, September 8, 2021 - 3:31:35 AM

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Molka Tounsi Dhouib. Knowledge engineering in the sourcing domain for the recommendation of providers. Information Retrieval [cs.IR]. Université Côte d'Azur, 2021. English. ⟨NNT : 2021COAZ4024⟩. ⟨tel-03336353⟩

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