Research ArticleOpen accessIn the author namesSpeech Enhancement Using Minimum Mean-Square Error Amplitude Estimators Under Normal and Generalized Gamma DistributionChabane Boubakir, Daoud BerkaniProblem statement: In this study, DFT-based speech enhancement via Minimum Mean-Square Error (MMSE) amplitude estimators was considered. Approach: Several variants of the basic approach (MMSE-STSA) have been proposed over the years to address certain shortcomings, chiefly the quality of the remnant noise and its trade-off with speech distortion. In this study, we presented a comparative study between the MMLSA and … …Journal of Computer Science, Vol. 6, Issue 7 · 31 Jul 2010 · 7,112 accessesView PDFCite
Research ArticleOpen accessIn the author namesQualitative Ferromagnetic Hysteresis ModelingM. Mordjaoui, M. Chabane, B. Boudjema, R. DairaIn determining the electromagnetic properties of magnetic materials, hysteresis modeling is of high importance. Many models are available to investigate those characteristics but they tend to be complex and difficult to implement. A new qualitative hysteresis model for ferromagnetic core presented, based on the function approximation capabilities of adaptive neuro-fuzzy inference system (ANFIS). The proposed ANFIS model combined the neural … …Journal of Computer Science, Vol. 3, Issue 6 · 30 Jun 2007 · 7,080 accessesView PDFCite
Research ArticleOpen accessIn the author namesRoundup of Graphical Navigation Helpers on the WebChabane Khentout, Mahieddine Djoudi, Lamri DouidiDespite the recent research, the Web remains mainly constituted of an ever-growing network of documents. As it becomes easier to publish documents, as the number of users and thus publishers, increases and as the number of documents grows, searching for information is turning into a cumbersome and time-consuming operation. Because of the loose interconnection between documents, people have difficulty remembering … …Journal of Computer Science, Vol. 3, Issue 3 · 31 Mar 2007 · 6,843 accessesView PDFCite
Research ArticleOpen accessIn the author namesUsers Assistants for E-Learning Environment Over the WebLamri Douidi, Mahieddine Djoudi, Chabane KhentoutIn this study, we present users assistants for e-learning environment over the Web called AVUNET. It was made up of an educational server that allows access to the available courses on the site. The server was structured in pedagogical labs that respond to the user needs. It offers also a module for self-evaluation so that the user can evaluate his/her … …Journal of Computer Science, Vol. 3, Issue 3 · 31 Mar 2007 · 7,112 accessesView PDFCite
Research ArticleOpen accessIn the author namesAVUNET Author: An Authoring System for Distance Learning PlatformLamri Douidi, Mahieddine Djoudi, Chabane KhentoutAn authoring system was presented in this study, “AVUNET Author” which allows the creation of interactive learning object within a distance teaching platform on the Internet. For the conception of this system, we stated with the assumption that the content of distance teaching is not just to put online the content used for classroom teaching. In addition to the classical … …Journal of Computer Science, Vol. 2, Issue 3 · 31 Mar 2006 · 6,761 accessesView PDFCite
Research ArticleOpen accessIn the author namesSupporting Tools to Simplify the Navigation Process over the WebChabane Khentout, Mahieddine Djoudi, Lamri DouidiWe Navigation through the Web has problems of positioning and space-temporal reference marks. Therefore, it’s necessary to design some computer-aided tools to help the user to position himself in space and time during a navigation session. The user is provided with a map of visited sites, thus giving an explicit representation of virtual space. Various levels of visualization are set … …Journal of Computer Science, Vol. 2, Issue 3 · 31 Mar 2006 · 6,675 accessesView PDFCite