Ahmed Lehireche

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Routing protocols for ad hoc networks typically include mechanisms for route discovery and route maintenance. The performance of these protocols depends on the route maintenance mechanism they use. The movement of network nodes can cause routes to become unusable. A node on a route from a source to a destination may become unreachable from its predecessor(More)
The development of the World Wide Web is a great success story with respect to the number of users and the amount of information that is nowadays offered by the WWW. However, most of the information that is available has to be interpreted by humans; machine support is rather limited. The next generation of the web, the semantic web, seeks to make(More)
Ontologies are widely used in several areas with applications including knowledge Management, Web commerce and electronic business. An ontology provides a consensus of concept specifications for a specific domain shared by a group of people. In this paper we deal with Ontology Learning, specifically we aim to adapt the WordNet ontology, a general source of(More)
By these days, most companies are more aware of than ever in providing quality of services over the web for reasons of economy, reliability, interoperability, flexibility, and universality. Enterprise application integration may rely on B2B scenarios where several candidate services with similar capabilities are provided by different service providers. The(More)
Evolutionary Engineering (EE) is defined to be “the art of using evolutionary algorithms approach such as genetic algorithms to build complex systems”. This paper deals with a neural net based system. It analyses ability of genetically trained neural nets to control Simulated robot arm, witch tries to track a moving object. In difference from classical(More)
Recent signijkant advances in artijicial intelligence have led to the emergence of new concepts of soji computing genetic programming, evolutionary engineering, hybrid intelligent systems, and artijicial life. EE design relies on evolutionary algorithms to construct or evolve complex systems. This paper is intended to highlight the concept of evolutionaly(More)
Ad hoc network is a set of nodes that are able to move and can be connected in an arbitrary manner. Each node acts as a router and communicates using a multi-hop wireless links. Nodes within ad hoc networks need efficient dynamic routing protocols to facilitate communication. An Efficient routing protocol can provide significant benefits to mobile ad hoc(More)
In this article we present a 2D cellular automaton (Class_AC) to solve a problem of text mining in the case of unsupervised classification (clustering). Before to experiment the cellular automaton, we vectorized our data indexing textual documents from the database REUTERS 21,578 by the approach of N-grams. The cellular automaton that we propose in this(More)
This paper describes a range of experiments using empirical methods to adapt the WordNet noun ontology for specific use in the biomedical domain. Our basic technique is to extract relationships between terms using the Ohsumed corpus, a large collection of abstracts from PubMed, and to compare the relationships extracted with those that would be expected for(More)
Résumé : Dans cet article nous présentons un automate cellulaire (Class_AC) pour résoudre un problème de text mining en l’occurrence la classification non supervisée (Clustering). Avant de procéder à l’expérimentation par l’automate cellulaire, nous avons vectorisés nos données en procédant à l’indexation des documents textuels provenant de la base de(More)