Syntheses of m-Styryltropolones and 1-(m-Tropolonyl)-3-Phenylpropenes

M/M/1 Feedback Queue Subject to Catastrophe and Repairment

‎In this paper‎, ‎an M/M/1 queue with instantaneous Bernoulli feedback is studied in the event of server failure‎, ‎the catastrophe occurs and after repair‎, ‎it starts to work again‎. ‎The transient response for the probability function of the system size is presented‎. ‎The steady state analysis of system size probabilities and some performance measures of system are provided‎. ‎Then the resu...

M m m Queue with Balking, Reneging and Additional Servers

In this paper, we consider a multi-server queuing system in which additional servers are allowed for a longer queue to reduce the customer’s balking and reneging behavior. The customers are assumed to arrive in Poisson fashion and their service- times follow exponential distribution. The number of servers in long run depends on the queue-length. We obtain equilibrium queue size distribution. Th...

مسائل مکان یابی ماکزیمم پوشش با سیستم های صف m/m/1، m/g/1 و m/m/k

مساله مکان?یابی ماکزیمم پوشش از جمله پرکاربردترین مسائل مکان?یابی محسوب می شود. در این مساله هدف تعیین مکان p مرکز سرویس و تخصیص نقاط تقاضا به آنها به گونه ای است که جمعیت سرویس داده شده ماکزیمم شود. یک از معیارهایی که موجب افزایش کیفیت خدمات رسانی توسط مراکز سرویس می شود، توجه به میانگین زمان انتظار در مراکز سرویس می باشد. در این رساله سه مساله مکان یابی ماکزیمم پوشش مورد بررسی قرار می گیرد....

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Transient Solution of an M/M/1 Variant Working Vacation Queue with Balking

This paper presents the transient solution of a variant working vacation queue with balking. Customers arrive according to a Poisson process and decide to join the queue with probability $b$ or balk with $bar{b} = 1-b$. As soon as the system becomes empty, the server takes working vacation. The service times during regular busy period and working vacation period, and vacation times are assumed ...