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Building Wireless Sensor Networks - Application to Routing and Data Diffusion (Hardcover): Smain Femmam Building Wireless Sensor Networks - Application to Routing and Data Diffusion (Hardcover)
Smain Femmam
R2,709 R2,529 Discovery Miles 25 290 Save R180 (7%) Ships in 12 - 17 working days

Building Wireless Sensor Networks: Application to Routing and Data Diffusion discusses challenges involved in securing routing in wireless sensor networks with new hybrid topologies. An analysis of the security of real time data diffusion-a protocol for routing in wireless sensor networks-is provided, along with various possible attacks and possible countermeasures. Different applications are introduced, and new topologies are developed. Topics include audio video bridging (AVB) switched Ethernet, which uses the representation of a network of wireless sensors by a grayscale image to construct routing protocols, thereby minimizing energy consumption and data sharing in vehicular ad-hoc networks. Existing wireless networks aim to provide communication services between vehicles by enabling the vehicular networks to support wide range applications. New topologies are proposed first, based on the graphiton models, then the wireless sensor networks (WSN) based on the IEEE 802.15.4 standard (ZigBee sensors, and finally the Pancake graphs as an alternative to the Hypercube for interconnecting processors in parallel computer networks.

Analyse, Traitement Et Diagnostic Des Signaux Non-Stationnaires (French, Paperback): Femmam-S Analyse, Traitement Et Diagnostic Des Signaux Non-Stationnaires (French, Paperback)
Femmam-S
R2,652 Discovery Miles 26 520 Ships in 10 - 15 working days

Deux nouvelles approches basees sur l'analyse, traitement et le diagnostic des signaux non- stationnaires sont developpees et experimentees. La premiere est basee sur les ondes ultrasonores traversant un materiau en vue de la caracterisation par le facteur de qualite en utilisant la methode du rapport de spectres. L'utilisation des methodes d'estimation spectrale par filtrage adaptatif en modelisation autoregressive AR ameliore l'estimation du facteur de qualite et donc la caracterisation. La seconde solution concerne la perception robotique. Elle se fait par l'estimation de l'angle de frottement interne. Ce parametre peut etre un moyen de diagnostic. Il est invariant vis-a-vis des formes geometriques des materiaux. Neanmoins, son estimation est variante par rapport aux frequences spectrales. Une solution a ete proposee pour resoudre ce probleme; elle se base sur un codage de la forme geometrique de l'angle de frottement interne en fonction des frequences. Les approches se basent sur les representations temps-frequence et les ondelettes pour la localisation d'energie et sur les techniques de detection de ruptures pour la segmentation des signaux."

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