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    List of Articles مهدی همایونفر


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    1 - ارائه مدل سرمایه‌گذاری مناسب جهت تعامل صنعت و دانشگاه با رویکرد پویایی شناسی سیستم ها
    Journal of Investment Knowledge , Issue 5 , Year , Winter 2013
    پویایی شناسی سیستم (SD) به عنوان رویکردی نوظهوری در مدلسازی و تجزیه و تحلیل سیستمهای پیچیده و بازخوردی مورد توجه قرار گرفته است. در این مقاله از این رویکرد در مدلسازی تعاملات صنعت و دانشگاه استفاده شده است. مطالعه بیش از 200 مقاله ISI در کنار سایر منابع کتابخانه ای و ای More
    پویایی شناسی سیستم (SD) به عنوان رویکردی نوظهوری در مدلسازی و تجزیه و تحلیل سیستمهای پیچیده و بازخوردی مورد توجه قرار گرفته است. در این مقاله از این رویکرد در مدلسازی تعاملات صنعت و دانشگاه استفاده شده است. مطالعه بیش از 200 مقاله ISI در کنار سایر منابع کتابخانه ای و اینترنتی و مصاحبه با اساتید دانشگاه و متخصصان به استخراج متغیرها و تنظیم فرضیات پویای مدل منجر شده است که بر اساس آنها به ترسیم نمودارهای علت و معلولی و موجودی و جریان پرداختیم. استخراج معادلات مربوط به روابط متغیرهای مدل و وارد ساختن آنها در نرم افزار Vensim منجر به شبیه سازی مدل گردید. نهایتاً جهت بررسی رفتار متغیرهای مهم مدل، آزمون مدل پیاده سازی شد که در تحقیق بطور مفصل مورد بررسی قرار گرفته است. Manuscript profile

  • Article

    2 - Developing an Efficiency Based Target Setting Model for K-Stage Serial tructures
    International Journal of Industrial Mathematics , Issue 4 , Year , Autumn 2020
    DEA as an effective approach to evaluate the relative efficiency of DMUs, recently applied in many production and operation systems. This paper proposed a new k-stage DEA based MOLP model for target setting in the serial network structures, considering undesirable outpu More
    DEA as an effective approach to evaluate the relative efficiency of DMUs, recently applied in many production and operation systems. This paper proposed a new k-stage DEA based MOLP model for target setting in the serial network structures, considering undesirable outputs. Since the proposed model takes the size of DMUs into account, the new idea ensures the possibility of the results. The results showed the applicability of the proposed plan. Manuscript profile

  • Article

    3 - A Combined group EA-PROMETHEE method for a supplier selection problem
    Iranian Journal of Optimization , Issue 5 , Year , Spring 2016
    One of the important decisions which impacts all firms’ activities is the supplier selection problem. Since the 1950s, several works have addressed this problem by treating different aspects and instances. In this paper, a combined multiple criteria decision makin More
    One of the important decisions which impacts all firms’ activities is the supplier selection problem. Since the 1950s, several works have addressed this problem by treating different aspects and instances. In this paper, a combined multiple criteria decision making (MCDM) technique (EA-PROMETHEE) has been applied to implement a proper decision making. To this aim, after reviewing the theoretical background regarding to supplier selection, the extension analysis (EA) is used to determine the importance of criteria and PROMETHEE for appraisal of suppliers based on the criteria. An empirical example illustrated the proposed approach. Manuscript profile

  • Article

    4 - An analysis of factors affecting on customers’ adoption of internet-banking services using the graph theory
    Iranian Journal of Optimization , Issue 2 , Year , Winter 2016
    The rapid development of Internet and electronic businesses have stimulated the banking sector towards encouraging customers to internet banking (IB), However, the evidence indicates a lack of interest in the use of IB services. Therefore, this paper aims to identify af More
    The rapid development of Internet and electronic businesses have stimulated the banking sector towards encouraging customers to internet banking (IB), However, the evidence indicates a lack of interest in the use of IB services. Therefore, this paper aims to identify affecting factors on customer adoption from IB and measure the influence of each factor on IB adoption. Based on an explorative literature review, numbers of factors were considered as affecting factors on customer adoption of IB. Then, these factors were sent to a sample of IB customers in form of a questionnaire. Having collected the filled questionnaires and based on a statistical test, the more important factors explored among all. Hence, many of these factors have relationship with each others; a graph theory based technique (DEMATEL) with feedback structure is used to explore the direct and indirect effects of factors on the other factors and the whole system. The results indicate that: responsiveness (effective handling of problems), accessibility to IB services (hardware necessities), speed of network, ease of use and no need to physical attendance in bank branch, respectively, are the most critical factors. Manuscript profile