نتایج جستجو برای: hub median problem queuing systems multi

تعداد نتایج: 2406021  

P-hub maximal covering location problem is one of the most commonly used location- allocation problems. In this problem, the goal is to determine the best location for the hubs such that the covered demand is maximized by considering the predefined coverage radius. In classical hub problems, if the distance between the origin and destination is less than this radius, coverage is possible; other...

Journal: :international journal of industrial engineering and productional research- 0
m. mohammadi master student in department of industrial engineering, college of engineering, university of tehran, iran r. tavakkoli-moghaddam professor in department of industrial engineering, college of engineering, university of tehran, iran. a. ghodratnama ph.d. student in department of industrial engineering, college of engineering, university of tehran, iran. h. rostami student in department of industrial engineering, college of engineering, university of tabriz, iran

hub covering location problem, network design,   single machine scheduling, genetic algorithm,   shuffled frog leaping algorithm   hub location problems (hlp) are synthetic optimization problems that appears in telecommunication and transportation networks where nodes send and receive commodities (i.e., data transmissions, passengers transportation, express packages, postal deliveries, etc.) th...

2016
Ji Ung Sun

This paper deals with a hub location-routing problem (HLRP) which integrates the hub location problem (HLP) and the multi-hub vehicle routing problem (MH-VRP) in parcel delivery service. The HLRP is very difficult to be solved since it is composed of two NP-hard problems, the HLP and the MH-VRP. To solve these problems simultaneously we present a novel solution framework which divides the probl...

Journal: :International Journal of Electrical Power & Energy Systems 2021

Energy hubs, which integrate multiple energy vectors through converters, can enhance the value of Integrated Local Systems (ILES) via increased flexibility and reduced costs. However, uncertain renewable non-convex, non-linear properties flows complicate modelling operation hub systems. This paper develops chance-constrained optimization methods for planning systems under uncertainty. The formu...

Journal: :amirkabir international journal of modeling, identification, simulation & control 2014
b. karimi h. ghiti sarand

this paper is concerned with the consensus tracking problem of high order mimo nonlinear multi-agent systems. the agents must follow a leader node in presence of unknown dynamics and uncertain external disturbances. the communication network topology of agents is assumed to be a fixed undirected graph. a distributed adaptive control method is proposed to solve the consensus problem utilizing re...

Journal: :international journal of smart electrical engineering 2013
samaneh pazouki mahmoud-reza haghifam javad olamaei

the biggest challenges faced in big cities are greenhouse gas emission and growing energy needs. efficient utilization of existing infrastructures has a prominent role in response to the challenges. energy hub approach embraces performance of different energy networks. energy hub is defined as a super node in electrical system receiving distinctive energy carriers such as gas and electricity in...

ژورنال: :چشم انداز مدیریت صنعتی 0
احسان نیکبخش دانشگاه تربیت مدرس سید حسامالدین ذگری دانشگاه تربیت مدرس

چکیده      شبکه های هاب یکی از انواع مهم شبکه های حمل ونقل هستند که در زمینه های مختلفی مانند حمل ونقل هوایی، پست و مخابرات کاربرد دارند. از ویژگی های مهم این شبکه ها، امکان وقوع اختلال در عملکرد آن ها به دلایلی ازقبیل ازکار افتادن تسهیل های هاب یا عدم دسترسی به یال های ارتباطی است. در این مطالعه، مسئله مکان یابی یال هاب پوششی با تخصیص چندگانه، تحت شرایط اختلال یال های هاب بررسی می شود. برای ای...

2015
Onkabetse A. Daman Sulaiman Sani O. A. Daman S. Sani

In this paper, we study some basic limit theorems characterizing the stationary behavior of light traffic queuing systems. Beginning with limit theorems for the simple M/M/1 queuing system, we demonstrate the methodology for applying these theorems for the benefit of service systems. The limit theorems studied here are dominant in the literature. Our contribution is primarily on the analysis le...

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The problem of staff scheduling at a truck hub for loading and stripping of the trucks is an important and difficult problem to optimize the labor efficiency and cost. The trucks enter the hub at different hours a day, in different known time schedules and operating hours. In this paper, we propose a goal programming to maximize the labor efficiency via minimizing the allocation cost. The propo...

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