نتایج جستجو برای: complexity of multi

تعداد نتایج: 21232310  

Farhad Samad Zadegan Mahmoud Reza Delavar Parham Pahlevani

Multi-criteria shortest path problems (MSPP) are called as NP-Hard. For MSPPs, a unique solution for optimizing all the criteria simultaneously will rarely exist in reality. Algorithmic and approximation schemes are available to solve these problems; however, the complexity of these approaches often prohibits their implementation on real-world applications. This paper describes the development ...

Journal: :مهندسی صنایع 0
سحر فلاح صنمی کارشناس ارشد رشته مدیریت صنعتی، دانشکدة اقتصاد و مدیریت، دانشگاه سمنان رضا رمضانیان استادیار رشتۀ مهندسی صنایع، دانشکدة مهندسی صنایع، دانشگاه صنعتی خواجه نصیرالدین طوسی محسن شفیعی نیک آبادی استادیار رشتۀ مدیریت صنعتی، دانشکدة اقتصاد و مدیریت، دانشگاه سمنان

the aim of this paper is to study a multi-product, multi-period production systems in a hybrid flow shop so that lot-sizing and scheduling will be detemined simultaneously. a new mixed-integer programming model is proposed to formulate the studied problem. the objective function in this investigation includes the total cost of production, inventory and external supply. in the case of not satisf...

Journal: :journal of teaching language skills 2015
andisheh saniei parviz birjandi esmaeel abdollahzadeh majid nemati

the purpose of the present study was to explore the effectiveness of raising iranian learners’ pragmatic awareness of intercultural rhetoric in enhancing their l2 writing ability, as well as their written complexity and accuracy. to this end, two 25-member groups of efl learners who were taking basic writing course at islamic azad university, roudehen branch, were selected based on their perfor...

Journal: :transactions on combinatorics 2016
mehdi kadivar

we give an algorithm, called t*, for finding the k shortest simplepaths connecting a certain pair of nodes, s and t, in a acyclic digraph.first the nodes of the graph are labeled according to the topologicalordering. then for node i an ordered list of simple s − i paths iscreated. the length of the list is at most k and it is created by usingtournament trees. we prove the correctness of t* and ...

M. R. Gholamian Mohammad Feizabadi Reza Rashid Seyed Farzad Hoseini

This paper presents a mathematical model for an inventory control system in which customers’ demands and suppliers’ service time are considered as stochastic parameters. The proposed problem is solved through queuing theory for a single item. In this case, transitional probabilities are calculated in steady state. Afterward, the model is extended to the case of multi-item inventory systems. The...

ژورنال: کنترل 2019

This paper has been devoted to the design of a distributed consensus control for a class of uncertain nonlinear multi-agent systems in the strict-feedback form. The communication between the agents has been described by a directed graph. Radial-basis function neural networks have been used for the approximation of the uncertain and heterogeneous dynamics of the followers as well as the effect o...

Because of the complexity of decision-making environment, the uncertainty of fuzziness and the uncertainty of grey maybe coexist in the problems of multi-attribute group decision making. In this paper, we study the problems of multi-attribute group decision making with hybrid grey attribute data (the precise values, interval numbers and linguistic fuzzy variables coexist, and each attribute val...

Journal: :international journal of management and business research 0
s. h. ahmadi department of industrial management, tehran university, tehran, iran s. r. alizadeh shani department of industrial management, tehran university, tehran, iran

in recent years stock exchange has become one of the most attractive and growing businesses in respect of investment and profitability. but applying a scientific approach in this field is really troublesome because of variety and complexity of decision making factors in the field. this paper tries to deliver a new solution for portfolio selection based on multi criteria decision making literatu...

One of the most important points in a supply chain is customer-driven modeling, which reduces the bullwhip effect in the supply chain, as well as the costs of investment on the inventory and efficient transshipment of the products. Their homogeneity is reflected in the Inventory Routing Problem, which is a combination of distribution and inventory management. This paper expands the classical In...

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