کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
475708 699356 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization analysis of an unreliable multi-server queue with a controllable repair policy
ترجمه فارسی عنوان
تجزیه و تحلیل بهینه سازی یک صف چند سرور چندان مطمئن با یک سیاست تعمیر قابل کنترل
کلمات کلیدی
هزینه، سیاست تعمیر قابل کنترل، بهینه سازی ذرات ذرات، روش کواسی نیوتن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر علوم کامپیوتر (عمومی)
چکیده انگلیسی

This article deals with an infinite-capacity multi-server queueing system, in which the servers are assumed unreliable and may fail at any time. To conserve energy while delivering reliable service, a controllable repair policy is introduced. With such a policy, the failed servers will be sent to the repair facility only when the number of failed machines in the system arrives at a preset threshold value. A quasi-birth-and-death process is used to model the complex system and the stability condition is examined. The rate matrix is calculated approximately and steady-state stationary distributions are obtained by a matrix-analytic approach. The closed-form expressions of important system characteristics are presented. A cost model is constructed to determine the optimal repair policy, the optimal value of service rate and the optimal value of repair rate. Three heuristic algorithms are employed to deal with the optimization problem. Some numerical results are provided to compare the efficiency of two methods.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Operations Research - Volume 49, September 2014, Pages 83–96
نویسندگان
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