Search results for "strophe"

showing 2 items of 62 documents

A Time-Non-Homogeneous Double-Ended Queue with Failures and Repairs and Its Continuous Approximation

2018

We consider a time-non-homogeneous double-ended queue subject to catastrophes and repairs. The catastrophes occur according to a non-homogeneous Poisson process and lead the system into a state of failure. Instantaneously, the system is put under repair, such that repair time is governed by a time-varying intensity function. We analyze the transient and the asymptotic behavior of the queueing system. Moreover, we derive a heavy-traffic approximation that allows approximating the state of the systems by a time-non-homogeneous Wiener process subject to jumps to a spurious state (due to catastrophes) and random returns to the zero state (due to repairs). Special attention is devoted to the cas…

time-non-homogeneous jump-diffusion processesComputer scienceGeneral Mathematicsdouble-ended queues01 natural sciencestransition densitiesdouble-ended queues; time-non-homogeneous birth-death processes; catastrophes; repairs; transient probabilities; periodic intensity functions; time-non-homogeneous jump-diffusion processes; transition densities; first-passage-time010104 statistics & probabilitysymbols.namesakeZero state responseWiener processrepairsComputer Science (miscellaneous)Applied mathematicstime-non-homogeneous birth-death processes0101 mathematicsSpurious relationshipEngineering (miscellaneous)Queuefirst-passage-timeQueueing theorytransient probabilitieslcsh:Mathematics010102 general mathematicslcsh:QA1-939catastrophesperiodic intensity functionssymbolsDouble-ended queueFirst-hitting-time modelConstant (mathematics)Mathematics; Volume 6; Issue 5; Pages: 81
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Une ontologie formalisée du domaine des risques et des catastrophes

2010

(pour publication dans un ouvrage relatif à l'ANR Cosmagems sous la direction de D. Phan, ed. prévu Hermes-Lavoisier); Nous présentons une ontologie formalisée du domaine des risques et des catastrophes et un premier exercice de validation à partir du récit de P. Hadfield (1992) sur " le Grand Séisme de Kantô de 1923 ". Il s'agit essentiellement d'une ontologie conceptuelle qui permet de décrire les connaissances du domaine. Dans cette ontologie, nous distinguons la terminologie utilisée pour décrire ce qui s'est passé en dehors de tout jugement subjectif (par exemple, il y a eu 30 morts à la suite d'une inondation), de la qualification de ce qui s'est passé (c'est un accident, une catastro…

validationreprésentationrisquecatastrophe[SHS.GEO] Humanities and Social Sciences/Geography[SHS.GEO]Humanities and Social Sciences/Geographyontologie[ SHS.GEO ] Humanities and Social Sciences/GeographyacteurUML
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