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    Relationship of profitability of world’s top companies with entrepreneurship, competitiveness, and business environment indicators

    , Article Applied Economics ; Volume 53, Issue 23 , December , 2020 , Pages 2584-2597 Khazaei, M ; Sharif University of Technology
    Routledge  2020
    Abstract
    Identifying the factors affecting profitability is important from the perspective of market players. One of the most important benchmarks of firm performance is accounting profit and effective factors analysis so that users of accounting information analyse the factors affecting profit, firm performance and various aspects of its performance and according to estimates Done, make your own decision on how to allocate resources. The main purpose of this study is to investigate the impact of some factors of competitiveness, entrepreneurship and business environment indicators on the profitability of the world’s top companies. For this purpose, 176 top companies in the world from 2013 to 2018... 

    The newsboy problem with random defective and probabilistic initial inventory

    , Article 36th International Conference on Computers and Industrial Engineering, ICC and IE 2006, Taipei, 20 June 2006 through 23 June 2006 ; 2006 , Pages 3498-3502 Haji, A ; Haji, R ; Bijari, M ; Sharif University of Technology
    2006
    Abstract
    The classical single-period problem (SPP) is to find a product's order quantity that maximizes the expected profit in a single period under probabilistic demand. In this paper we consider a SPP model in which a percent of the quantity ordered to the supplier contains defective units and is a random variable with a known distribution function. We assume that the initial inventory at the beginning of the period is a random variable. This assumption, among other applications, may apply to the case where the decision about the order quantity must be made at a time long before the start of the period and the available inventory may decrease stochastically due to several factors, such as... 

    Erratum: Determination of price and warranty length for a normal lifetime distributed product (International Journal of Production Economics (2006) 102: 1 (95-107))

    , Article International Journal of Production Economics ; Volume 137, Issue 2 , Volume 137, Issue 2 , 2012 , Pages 309-310 ; 09255273 (ISSN) Faridimehr, S ; Akhavan Niaki, T ; Sharif University of Technology
    2012
    Abstract
    This paper points out a flaw in the derivation of the optimal price and warranty length policies proposed by Wu et al. (2006) (Wu, C.C., Lin, P.C., Chou, C.Y. Determination of price and warranty length for a normal lifetime distributed product. International Journal of Production Economics 102 (2006): 95–107). While we show one of the optimal strategies that they considered is incorrect, correct versions of the optimal strategies are presented  

    A stochastic approach for valuing customers in banking industry: A case study

    , Article Industrial Engineering and Management Systems ; Volume 19, Issue 4 , 2021 , Pages 744-757 ; 15987248 (ISSN) Bekamiri, H ; Mehraeen, M ; Pooya, A ; Sharif, H ; Sharif University of Technology
    Korean Institute of Industrial Engineers  2021
    Abstract
    This study provides a stochastic dynamic programming model with a Markov chain that explicitly focuses on the customer as well as a new model for valuing the customers in the banking industry. The proposed framework calculates individual customer’s lifetime value dynamically. The study follows a stochastic dynamic programming model that is based on the Markov chain. The deduced findings are illustrated with supplementary context from an outstanding case study. The findings underline the importance of the stochastic model for calculating customer lifetime value based on customer behavior. The presented framework provides a beneficial way for future research and valuable insight for allocating... 

    Relationship of profitability of world’s top companies with entrepreneurship, competitiveness, and business environment indicators

    , Article Applied Economics ; Volume 53, Issue 23 , 2021 , Pages 2584-2597 ; 00036846 (ISSN) Khazaei, M ; Sharif University of Technology
    Routledge  2021
    Abstract
    Identifying the factors affecting profitability is important from the perspective of market players. One of the most important benchmarks of firm performance is accounting profit and effective factors analysis so that users of accounting information analyse the factors affecting profit, firm performance and various aspects of its performance and according to estimates Done, make your own decision on how to allocate resources. The main purpose of this study is to investigate the impact of some factors of competitiveness, entrepreneurship and business environment indicators on the profitability of the world’s top companies. For this purpose, 176 top companies in the world from 2013 to 2018... 

    Analysis of Profit Pool in Energy Industry of Iran and Examining the Future of this Industry

    , M.Sc. Thesis Sharif University of Technology Malali, Ahmadreza (Author) ; Talebian, Masoud (Supervisor)
    Abstract
    Unequal distribution of profit and income in different sectors of industries creates a challenge for investors and their managers to determine the level of concentration and investment in each industry sector. The energy industry, as one of the most important ones in the country, will not be an exception to this rule. Iran, as a country with a competitive advantage in the world in this industry, can take the path of development if this industry is used correctly and to the maximum. Also, owners, regulators and investors of this industry must constantly monitor it so that they can determine its growth. This research aims to closely monitor this industry to create guidelines for all the people... 

    Simulation and Optimization of Poly-Generation Energy Systems Through Methanol Plants

    , M.Sc. Thesis Sharif University of Technology Moradi Aliabadi, Majid (Author) ; Pishvaie, Mahmoud Reza (Supervisor)
    Abstract
    Ever-increasing energy consumption and consequent extensive greenhouse gas (GHG) emissions have become two major global challenges for all human beings in the 21st century. If this trend of increasing energy consumption continues, our primary energy reserves willbe exhausted very soon.One solution is, shift of primary energy resources from fossil fuels to renewable energy could greatly reduce the current heavy dependence upon fossil fuels. Renewable energies have small share in the global energy market, therefore couldn't be a main method in the mid-term. Because of the low efficiency and consequent extensive GHG emissions of the conventional power generation that producing major amount of... 

    A genetic fuzzy expert system to optimize profit function

    , Article Economic Computation and Economic Cybernetics Studies and Research ; Volume 8 , 2012 ; 0424267X (ISSN) Mahmoudi, A ; Shavandi, H ; Sharif University of Technology
    2012
    Abstract
    In this paper we develop a fuzzy system to obtain the demand based on input variables of price, warranty length and lead time of order delivery. We use linguistic terms to illustrate the situation of input and output variables and construct a fuzzy rule base. The fuzzy rule base is integrated with a genetic algorithm to construct a hybrid solution method. The best value of price, warranty length and lead time are obtained by maximizing the manufacturer profit. Finally a numerical example is presented to show the performance of proposed approach  

    Degradation based optimization framework for long term applications of energy systems, case study: Solid oxide fuel cell stacks

    , Article Energy ; Volume 107 , 2016 , Pages 172-181 ; 03605442 (ISSN) Roshandel, R ; Parhizkar, T ; Sharif University of Technology
    Elsevier Ltd  2016
    Abstract
    Depletion of fossil fuels has increased the pressure on energy systems to operate in the most efficient and economical mode. This tendency promotes energy systems to operate at optimum operating conditions, which maximizes the system profit over lifetime. Recently, there have been many attempts to maximize lifetime profit. Most of them concentrate on the power generation aspect without incorporating further aspects such as system degradation and profitability through lifetime. However, the main intention of the system operators is to optimize the profitability of system at the moment of operation and not the total profitability through the system lifetime. In this study a novel approach is... 

    A two-echelon single-period inventory control problem under budget constraint

    , Article International Journal of Advanced Manufacturing Technology ; Volume 56, Issue 9-12 , 2011 , Pages 1205-1214 ; 02683768 (ISSN) Pasandideh, S. H ; Niaki, S. T. A ; Rashidi, R ; Sharif University of Technology
    Abstract
    This paper points out an application of the "two-echelon single-period product (newsboy) problem," in which within a limited budget the final product and the raw materials are purchased before the start of the selling period and depending on the demand, the raw materials may be transformed into the finished product during the period. The objective of this problem is to find the order quantities of both the raw materials and the final product at the beginning of the period such that the expected profit is maximized. A new model is first developed for this problem and then a Lagrangian method is proposed to solve it. Finally, a numerical example is given to illustrate the application of the... 

    Partial equilibrium modelling of world crude oil demand, supply and price

    , Article Energy Systems ; Volume 8, Issue 1 , 2017 , Pages 217-226 ; 18683967 (ISSN) Masoumzadeh, A ; Most, D ; Ookouomi Noutchie, S. C ; Sharif University of Technology
    Springer Verlag  2017
    Abstract
    Oil production strategies define to a large extent the future of the world crude oil market. This paper aims at modelling the long-term world crude oil supply and demand, as well as the global oil price. The main assumption is that non-OPEC and OPEC oil producers act as price-taker and strategic players respectively. The world crude oil demand is modelled as a linear price dependent function. We compare four scenarios to diagnose the OPEC’s supply behaviour: “cartel”, “oligopoly”, “mixed-cartel” and “mixed-oligopoly”. A Mixed Complementarity Problem, MCP, is used to find the Nash equilibrium point of each game scenario. The OPEC countries maximize their individual total discounted profits in... 

    On Coordination of Smart Grid and Cooperative Cloud Providers

    , Article IEEE Systems Journal ; Volume 15, Issue 1 , 2021 , Pages 672-683 ; 19328184 (ISSN) Mohebbi Moghaddam, M ; Manshaei, M. H ; Naderi Soorki, M ; Saad, W ; Goudarzi, M ; Niyato, D ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2021
    Abstract
    Cooperative cloud providers in the form of cloud federations can potentially reduce their energy costs by exploiting electricity price fluctuations across different locations. In this environment, on the one hand, the electricity price has a significant influence on the federations formed, and, thus, on the profit earned by the cloud providers, and on the other hand, the cloud cooperation has an inevitable impact on the performance of the smart grid. In this regard, the interaction between independent cloud providers and the smart grid is modeled as a two-stage Stackelberg game interleaved with a coalitional game in this article. In this game, in the first stage the smart grid, as a leader... 

    Profit maximization of big data jobs in cloud using stochastic optimization

    , Article IEEE Transactions on Cloud Computing ; Volume 9, Issue 4 , 2021 , Pages 1563-1574 ; 21687161 (ISSN) Nabavinejad, S. M ; Goudarzi, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2021
    Abstract
    Reserved instances offered by cloud providers make it possible to reserve resources and computing capacity for a specific period of time. One should pay for all the hours of that time interval; in exchange, the hourly rate is significantly lower than on-demand instances. Reserved Instances can significantly reduce the monetary cost of resources needed to process big data applications in cloud. However, purchases of these instances are non-refundable, and hence, one should be able to estimate the required resources prior to purchase to avoid over-payment. It becomes important especially when the results obtained by big data job has monetary value, such as business intelligence applications.... 

    A Product Portfolio Scenario Selection Model Considering Multi Products Focusing on Business Sustainability

    , M.Sc. Thesis Sharif University of Technology latifi, Parisa (Author) ; Fatahi Valilai, Omid (Supervisor)
    Abstract
    In each organization, decision-making about products and their impact on the profitability of the organization is vital. Today, with the constant changes and resource constraints, as well as the growing importance of environmental issues for organizations, creating a decision model that considers all of the aformentioned aspects is vital. This study considers ten effective factors related to product portfolio and focuses on maintaining business sustainability in multi-product organizations. First, by assessing the relationship between criteria and products, the priority and weight of each of the criteria by the network analysis process (ANP) method are determined. In the next step, using the... 

    Cost and Profit Efficiency of Iranian Banking Sector Using Parametric and Non-Parametric Methods

    , M.Sc. Thesis Sharif University of Technology Shekarchi, Ashkan (Author) ; Keshavarz Haddad, Gholamreza (Supervisor)
    Abstract
    In this research, by employing DEA non-parametric and SFA parametric methods, the cost and profit efficiency of Iranian banking system are estimated in the period 2002-2007. Afterwards, the results are evaluated and analyzed via six aspects proposed in consistency conditions. Furthermore, we take advantage of standard non-frontier performance measures namely the cost to assets ratio (TC/A) and profit to assets (/A) for comparing them with estimated cost and profit efficiencies. The findings suggest the high degree of consistency between the results of parametric and non-parametric methods; meanwhile, any significant correlation is not seen between ownership (public/private) and type of... 

    Envy free chain store pricing

    , Article 2011 CSI International Symposium on Computer Science and Software Engineering, CSSE 2011, 15 June 2011 through 16 June 2011 ; June , 2011 , Pages 44-47 ; 9781612842073 (ISBN) Fazli, M ; Nikparto, N ; Saghafian, M ; Sharif University of Technology
    2011
    Abstract
    In this paper we study envy free pricing problem in general graphs where there is not a seller in every graph's nodes. We assume unique establishment cost for initiating a store in each node and we wish to find an optimal set of nodes in which we would make the maximum profit by initiating stores in them. Our model is motivated from the observation that a same product has different prices in different locations and there is also an establishing cost for initiating any store. We consider both of these issues in our model: first where should we establish the stores, and second at what price should we sell our items in them to gain maximum possible profit. We prove that in a case of constant... 

    An integrated vendor-buyer model with stock-dependent demand

    , Article Transportation Research Part E: Logistics and Transportation Review ; Volume 46, Issue 6 , November , 2010 , Pages 963-974 ; 13665545 (ISSN) Sajadieh, M. S ; Thorstenson, A ; Akbari Jokar, M. R ; Sharif University of Technology
    2010
    Abstract
    We develop an integrated vendor-buyer model for a two-stage supply chain. The vendor manufactures the product and delivers it in a number of equal-sized batches to the buyer. The items delivered are presented to the end customers in a display area. Demand is assumed to be positively dependent on the amount of items displayed. The objective is to maximize total supply chain profit. The numerical analysis shows that buyer-vendor coordination is more profitable in situations when demand is more stock dependent. It also shows that the effect of double marginalization provides a link between the non-coordinated and the coordinated case  

    New approach for strategic bidding of gencos in energy and spinning reserve markets

    , Article Energy Conversion and Management ; Volume 48, Issue 7 , 2007 , Pages 2044-2052 ; 01968904 (ISSN) Soleymani, S ; Ranjbar, A. M ; Shirani, A. R ; Sharif University of Technology
    2007
    Abstract
    In restructured and de-regulated power systems, generating companies (Gencos) are responsible for supplying electricity for both energy and reserve markets, which usually operate simultaneously. In this condition, the question is how much and for what price must each Genco generate for each market to maximize its profit, so this paper intends to answer to this question. In this paper, first, the combined energy and reserve markets are considered, and the Nash equilibrium points are determined. Then, the bidding strategies for each Genco at these points will be presented. The bids for the energy and 10 min spinning reserve (TMSR) markets are separated in the second stage, and again, the... 

    Proof of humanity: a tax-aware society-centric consensus algorithm for blockchains

    , Article Peer-to-Peer Networking and Applications ; Volume 14, Issue 6 , 2021 , Pages 3634-3646 ; 19366442 (ISSN) Arjomandi Nezhad, A ; Fotuhi Firuzabad, M ; Dorri, A ; Dehghanian, P ; Sharif University of Technology
    Springer  2021
    Abstract
    Blockchain technology brings about an opportunity to maintain decentralization in several applications, such as cryptocurrency. With the agents of a decentralized system operating independently, it calls for a consensus protocol that helps all nodes to agree on the state of the ledger. Most of the existing blockchains rely on Proof of Work (PoW) as the underlying consensus algorithm, resulting in a significant amount of electricity power consumption. Furthermore, it demands the miner to buy specific computation devices. Besides, a protocol to gather the society-related taxes such as public education funding and charities is lacking in existing consensus algorithms. In response, this paper... 

    Analysis the Effect of Structure on Spreading Information in Social Networks

    , M.Sc. Thesis Sharif University of Technology Babaei, Mahmoud Reza (Author) ; Safari, Mohammad Ali (Supervisor)
    Abstract
    The dynamic behavior of networks largely depends on their structural properties. The information or failures can spread through the links of complex networks constructed by people or agents, and their physical and informational contacts. In this research, the process of network diffusion was investigated in different model and real networks. In particular, we focused on ”cascaded failure” and ”viral marketing” which are among the major topics that have attracted much attention in this context. Firstly, we investigated the robustness of modular complex networks against random and systematic component failures. Many real-world networks have modular structure and they may undergo random errors...