فهرست مطالب

Applied Research on Industrial Engineering - Volume:5 Issue: 1, Spring 2018

Journal of Applied Research on Industrial Engineering
Volume:5 Issue: 1, Spring 2018

  • تاریخ انتشار: 1397/02/30
  • تعداد عناوین: 7
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  • Giampietro Fabbri *, Matteo Greppi Pages 1-9

    In the present work, an innovative hybrid solar panel is proposed, which can be used to pave floors or to cover roofs. A particular heat sink is employed, which gives robustness to the panel and provides a better heat transfer effectiveness with respect to tube heat exchangers. The geometry of the heat sink which is employed in the panel is optimized with the help of a numerical model and a genetic algorithm. Some optimization examples are shown. The velocity and temperature distributions on the heat sink cross section are also investigated. The presented hybrid panel allows till 20% increase in the electrical efficiency with respect to a simple photovoltaic panel. Moreover, it can be easily installed under every environmental condition due to its robustness and resistance to water infiltration.

    Keywords: Solar panel, Heat sink, Thermal efficiency, Genetic Algorithm
  • Boby John *, Abdulrahiman Areshankar Pages 10-26
    Six Sigma is a structured and systematic approach to performance and quality improvement. Six Sigma is a rigorous methodology consists of five major phases, namely definition, measure, analysis, improvement, and control for problem solving. A lot of case studies have been published and many large organizations have reported financial benefits by the application of Six Sigma methodology. This paper is a case study on reducing the bearing end plate reworks in a machining process through the application of Six Sigma methodology. The study focuses on reducing the rework due to thickness and diameter variation. From the list of identified potential causes, two causes, namely tool type and coolant pH are shortlisted as root causes. The optimum values of tool type and coolant pH, which would simultaneously optimize the diameter and thickness, are identified using the design of experiments and Taguchi's loss function approach. The implementation of optimum settings shows that the capability of the machining process to meet the customer requirements on thickness and diameter has substantially improved and rework has reduced.
    Keywords: Six Sigma, DMAIC, Analysis of Variance, Simultaneous optimization of multiple characteristics, Taguchi's loss function, Bearing end plate
  • Neda Gol-Ahmadi *, Sadigh Raissi Pages 27-38
    In this research, multi-state complex systems are analyzed in order to measure reliability and predict residual of systems’ lifetime under the effect of an out of control noise factor. Hence, the analytic method helps us to estimate multi-state system reliability, and then means residual lifetime that is calculated under normal conditions. Finally, the calculation is updated for out of control noisy condition using the accelerated method. To reveal the applied results, the proposed policy is implemented in a case study in a molding machine on SNJ Co. at Isfahan.
    Keywords: Mean residual lifetime, Multi, state system, Noise factor, System reliability, Control chart
  • Furkan Uysal *, SelCuk KUrat leyen, Cihan, Ccedil, Etinkaya Pages 39-49
    Despite the dynamic nature of real life scheduling problems, few studies focus on stochastic resource constrained project scheduling problem and its variants. In this study, we consider stochastic resource possibilities and propose a new chance constraint, piecewise-linear and mixed integer programming model. Model is tested and verified with known project instances. One of the main strengths of the proposed model is it can be used to construct baseline schedules with a predetermined confidence interval. This gives scheduler an opportunity to construct proactive actions in order to minimize disruptions.
    Keywords: Stochastic resources, resource demand, resource constrained scheduling
  • Nemat Allah Taghi-Nezhad, Fatemeh Taleshian * Pages 50-61
    Quadratic Programming has been widely applied to solve real-world problems. This paper describes a solution method for solving a special class of fuzzy quadratic programming problems with fuzziness in relations. Then the method is generalized to a more general fuzzy quadratic programming problem, where the cost coefficients, the matrix of the quadratic form, constraints coefficients, and the right-hand sides are all fuzzy numbers. Finally, some examples are taken to the utility of our proposed method.
    Keywords: Fuzzy number, Quadric Programming, Membership function, Fuzzy arithmetic, fuzzy constraint
  • Ali Montazeri, Javid Jouzdani * Pages 62-80
    Understanding financial literacy and knowing the financial skills that an investor can invest in Tehran Stock Exchange are very important in order to reduce investor's concerns and worries. Hence, investment companies that invest on behalf of their stockholders can reduce these concerns and worries. Therefore, the advertising activities of these companies are important in attracting investors, as well as providing company activities, etc. In this paper, the appropriate criteria and desired advertising activities that are obtained by financial literacy for investment companies, which are invested in Tehran Stock Exchange, are outlined. These advertising activities are ranked by using the step-by-step approach of analytic network process which is a multi-criteria decision-making method. According to its results, advertising activities using TV has the most weight among other advertising activities. This indicates that the use of television for advertising in company investments in Tehran Stock Exchange will be very influential. Also, social networks are ranked second, and in the end, two activities of billboards and magazines with a very small difference are placed in the fifth and sixth rankings. These two advertising activities have less effect than other ones in Tehran Stock Exchange investment companies.
    Keywords: Advertising activities, Tehran Stock Exchange Investment, Literacy, Network analysis process
  • Hamzeh Amin-Tahmasbi *, Seyedeh Samaneh Shariatmadari Pages 81-96
    The Bankruptcy of insurance companies compared to companies in other industries can have a more devastating impact on the customers of this industry and on society as a whole; because the insurance company's bankruptcy is equal to the risk of the economic presence of the insurer and third parties. Severe outcomes of insurance company's bankruptcy have made financial monitoring institutions to design systems for evaluation and supervision of insurance companies’ solvency in order to reduce bankruptcy risk of these companies. Inappropriate design of these systems may transmit incorrect signals to the insurance companies, lawmakers, and insurers and would have irreversible effects. Thus, the current research aims at prioritizing different solvency monitoring systems of Iran Insurance Company using Analytic Network Process (ANP). This is an applied research in terms of purpose, and it is descriptive - analytical research in terms of data collection method. The identified indexes for evaluation and monitoring the insurance companies’ solvency include the quantitative computational aspects, flexibility, and qualitative aspects. Following data collection using the network analysis software, which was used for advanced hierarchy analysis and DEMATEL, which was used for ranking qualitative, quantitative aspects, and flexibility, it is concluded that the quantitative computational index has the highest impact, and the qualitative index has the lowest impact on the solvency of Iran Insurance Company.
    Keywords: Different solvency monitoring systems, Iran Insurance Company, Analytic Network Process (ANP), DEMATEL