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    A hybrid approach based on locally linear neuro-fuzzy modeling and TOPSIS to determine the quality grade of gas well-drilling projects

    , Article Journal of Petroleum Science and Engineering ; Vol. 114 , 2014 , pp. 99-106 ; ISSN: 09204105 Ahari, R. M ; Niaki, S.T. A ; Sharif University of Technology
    Abstract
    Evaluation of a project and its contractors has considerable importance in gas well-drilling projects due to their high investments and worth. In this paper, the quality of some gas well-drilling projects is analyzed in order to evaluate and grade project tasks. A neuro-fuzzy network is utilized to learn the grading process and generate models. To select among these models, a ranking method, namely technique for order of preference by similarity to ideal solution (TOPSIS) is employed. During seven gas well-drilling projects, 77 tasks are studied based on quality practitioners[U+05F3] points of view. After generating the primary models, three indices namely, root mean square error (RMSE),... 

    Application of fuzzy AHP approach for financial performance evaluation of iranian petrochemical sector

    , Article Procedia Computer Science ; Vol. 31, issue , 2014 , p. 995-1004 Shaverdi, M ; Heshmati, M. R ; Ramezani, I ; Sharif University of Technology
    Abstract
    Organizational performance evaluation is a very vital and sensitive process in any industry. One of the most crucial aspects of performance assessment is consideration of financial performance evaluation. In this kind of evaluation, we face many criteria and index to performing and also designing a comprehensive and effective model. Thus, this situation can be regarded as a fuzzy multiple criteria decision-making (MCDM) problem, so the fuzziness and uncertainty of subjective perception should be considered. In this paper performance evaluation of seven active companies in the petrochemical industries was evaluated using combined method of fuzzy and analytic hierarchy process. In this paper... 

    Combining fuzzy AHP and fuzzy topsis with financial ratios to design a novel performance evaluation model

    , Article International Journal of Fuzzy Systems ; Volume 18, Issue 2 , 2016 , Pages 248-262 ; 15622479 (ISSN) Shaverdi, M ; Ramezani, I ; Tahmasebi, R ; Anvary Rostamy, A. A ; Sharif University of Technology
    Springer Berlin Heidelberg  2016
    Abstract
    Financial performance evaluation is a very crucial process for industries in current highly competitive environment. Therefore, designing an accurate and appropriate performance evaluation framework is beneficial for insiders and also shareholders of a company. To evaluate financial performance, we need to consider some financial indicators that reflect the competitiveness of a company. There are many financial indicators and criteria that are vague and can be regarded as a fuzzy multiple criteria decision-making (MCDM) problem. In this paper, we developed a new financial performance evaluation framework to rank the companies in Iranian petrochemical industry based on fuzzy MCDM approach. To... 

    Multi-criteria group decision making using a modified fuzzy TOPSIS procedure

    , Article International Conference on Computational Intelligence for Modelling, Control and Automation, CIMCA 2005 and International Conference on Intelligent Agents, Web Technologies and Internet Commerce, IAWTIC 2005, Vienna, 28 November 2005 through 30 November 2005 ; Volume 2 , 2005 , Pages 215-220 ; 0769525040 (ISBN); 9780769525044 (ISBN) Saghafian, S ; Hejazi, S. R ; Sharif University of Technology
    2005
    Abstract
    In this paper we propose a modified Fuzzy Technique for Order Performance by Similarity to Ideal Solution (modified Fuzzy TOPSIS) for the Multi-criteria Decision Making (MCDM) problem when there is a group of decision makers. Regarding the value of the truth that a fuzzy number is greater than or equal to another fuzzy number, a new distance measure is proposed in this paper. This distance measure calculates the distance of each fuzzy number from both Fuzzy Positive Ideal Solution (FPIS) and Fuzzy negative Ideal Solution (FNIS). Then, the alternative which is simultaneously closer to FPIS and farther from FNIS will be selected as the best choice. To clarify our proposed procedure, a... 

    A fuzzy-stochastic OWA model for robust multi-criteria decision making

    , Article Fuzzy Optimization and Decision Making ; Volume 7, Issue 1 , 2008 , Pages 1-15 ; 15684539 (ISSN) Zarghami, M ; Szidarovszky, F ; Ardakanian, R ; Sharif University of Technology
    2008
    Abstract
    All realistic Multi-Criteria Decision Making (MCDM) problems face various kinds of uncertainty. Since the evaluations of alternatives with respect to the criteria are uncertain they will be assumed to have stochastic nature. To obtain the uncertain optimism degree of the decision maker fuzzy linguistic quantifiers will be used. Then a new approach for fuzzy-stochastic modeling of MCDM problems will be introduced by merging the stochastic and fuzzy approaches into the OWA operator. The results of the new approach, entitled FSOWA, give the expected value and the variance of the combined goodness measure for each alternative. Robust decision depends on the combined goodness measures of... 

    Data envelopment analysis based comparison of two hybrid multi-criteria decision-making approaches for mobile phone selection: a case study in Iranian telecommunication environment

    , Article International Journal of Information and Decision Sciences ; Volume 1, Issue 2 , 2008 , Pages 194-220 ; 17567017 (ISSN) Mahdavi, I ; Fazlollahtabar, H ; Mozaffari, E ; Heidari, M ; Mahdavi Amiri, N ; Sharif University of Technology
    2008
    Abstract
    The arrival of the mobile phone and its rapid and widespread growth may well be seen as one of the most significant developments in the fields of communication and information technology over the past two decades. The aim of this study is to compare two hybrid multi-criteria decision-making (MCDM) approaches to evaluate the mobile phone options with respect to user’s preferences. Firstly, we identify the most desirable features influencing the choice of a mobile phone. This is realised through a survey conducted among the target group, the experiences of the telecommunication sector experts and the studies in the literature. Secondly, two MCDM methods are used in the evaluation procedure.... 

    Thermodynamic assessment and multi-objective optimization of performance of irreversible dual-miller cycle

    , Article Energies ; Volume 12, Issue 20 , 2019 ; 19961073 (ISSN) Abedinnezhad, S ; Ahmadi, M. H ; Pourkiaei, S. M ; Pourfayaz, F ; Mosavi, A ; Feidt, M ; Shamshirband, S ; Sharif University of Technology
    MDPI AG  2019
    Abstract
    In this study, a new series of assessments and evaluations of the Dual-Miller cycle is performed. Furthermore, the specified output power and the thermal performance associated with the engine are determined. Besides, multi-objective optimization of thermal efficiency, ecological coefficient of performance (ECOP) and ecological function (Eun) by means of NSGA-II technique and thermodynamic analysis are presented. The Pareto optimal frontier obtaining the best optimum solution is identified by fuzzy Bellman-Zadeh, Linear Programming Technique for Multidimensional Analysis of Preference (LINMAP), and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) decision-making... 

    Multi-criteria decision making for integrated urban water management

    , Article Water Resources Management ; Volume 22, Issue 8 , 2008 , Pages 1017-1029 ; 09204741 (ISSN) Zarghami, M ; Abrishamchi, A ; Ardakanian, R ; Sharif University of Technology
    2008
    Abstract
    The city of Zahedan, in South-eastern Iran, has high population growth, limited local freshwater resources and inadequate water distribution system resulting in water supply failures in recent years. This paper will investigate integration of several demand management measures such as leakage detection on water distribution network, water metering and low volume water fixtures as well as the conjunctive use of surface and groundwater resources of this city. For integration of water management criteria, compromise programming will be used as a multi-objective decision making method. The criteria include minimizing the cost, maximizing water supply and minimizing the social hazards due to the...