Displaying 301 – 320 of 1558

Showing per page

An introduction to multiprocessor scheduling.

J.K. Lenstra, A.H.G. Rinnooy (1981)

Qüestiió

This is a tutorial survey of recent results in the area of multiprocessor scheduling. Computational complexity theory provides the framework in which these results are presented. They involve on one hand the development of new polynomial optimization algorithms, and on the other hand the application of the concept of NP-hardness as well as the analysis of approximation algorithms.

An M/G/1 queueing system with compulsory server vacations.

Kilash C. Madan (1992)

Trabajos de Investigación Operativa

This paper deals with a single server queue with compulsory server vacations. There are single Poisson arrivals with mean arrival date λ and the service is performed in batches of fixed size M (≥1) or min (n, M) and the service times of successive batches follow a general distribution with the density function D(x). The Laplace transforms of the probability generating functions of different states of the system have been obtained, the corresponding steady state results have been derived and in a...

An MX/G/1 unreliable retrial queue with two phase service and persistence behaviour of customers in service

M. Senthil Kumar, R. Arumuganathan (2013)

RAIRO - Operations Research - Recherche Opérationnelle

This paper describes an unreliable server batch arrival retrial queue with two types of repair and second optional service. The server provides preliminary first essential service (FES) to the primary arriving customers or customers from retrial group. On successful completion of FES, the customer may opt for second optional service (SOS) with probability α. The server is subject to active break downs. The customer under FES (or SOS) during the failure decides, with probability q, to join the orbit(impatientcustomer)...

An SMDP model for a multiclass multi-server queueing control problem considering conversion times

Zhicong Zhang, Na Li, Shuai Li, Xiaohui Yan, Jianwen Guo (2014)

RAIRO - Operations Research - Recherche Opérationnelle

We address a queueing control problem considering service times and conversion times following normal distributions. We formulate the multi-server queueing control problem by constructing a semi-Markov decision process (SMDP) model. The mechanism of state transitions is developed through mathematical derivation of the transition probabilities and transition times. We also study the property of the queueing control system and show that optimizing the objective function of the addressed queueing control...

Currently displaying 301 – 320 of 1558