Saeed Rasouli

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In this paper, we introduce the notion of Σ-hyperalgebras for an arbitrary signature Σ and provide some examples. Then we extend the notions of several kinds of homomorphisms and study their properties. Also, we study subhyperalgebras of a Σ-hyperalgebra A, Sub(A), under algebraic closure operators S, H and I. Finally, we introduce the notions of closed,(More)
Clustering algorithm has an important effect on the performance of wireless sensor network. In this paper, a new Multi-Hop and Hierarchical Clustering algorithm (MHHC) is proposed to increases life time of wireless sensor networks. This algorithm selects the cluster-head with considering of three factors, maximum energy, the number of neighbors and the(More)
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