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The applications of digital image processing techniques over coral reefs are emerging research field due to coral reefs importance in marine ecosystems. One important step to make a correct analysis of these reefs is segmentation stage. Few automatic segmentation techniques in corals have been used to solve this problem, which is why in this paper we propose a texture segmentation algorithm with applications...
In this paper we consider quasi-birth-and-death (QBD) processes where the upward (resp. downward) transitions are restricted to occur only from (resp. to) a subset of the phase space. This property is exploited to reduce the computation time to find the matrix R or G of the process. The reduction is done through the definition of a censored process which can be of the M/G/1- or GI/M/1-type. The approach...
In this paper we introduce a mean field model to analyze an optical switch equipped with both wavelength converters (WCs) and fiber delay lines (FDLs) to resolve contention in OBS networks. Under some very general conditions, that is, a general burst size distribution and any Markovian burst arrival process at each wavelength, this model determines the minimum number of WCs required to achieve a zero...
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