Iran » page 80 » Growing Science

Growing Science » Countries » Iran

Journals

Countries

791.

Decision-making for flexible manufacturing systems using DEMATEL and SAW Pages 363-372 Download PDF

Authors: Reza Talebanpour, Mehrdad Javadi

DOI: 10.5267/j.dsl.2015.4.002

Keywords: Decision making, DEMATEL, Flexible manufacturing system, Simple Additive Weighting

Abstract:

Flexible manufacturing system (FMS) is an important component of competitive strategy, which could be used for improving organizational performance, productivity, and profitability. The goal of this research is to use DEMATEL approach for finding the intensity of influence of selected criteria. Then, in order to evaluate flexible manufacturing systems, the results of DEMATEL are used in SAW method. A questionnaire was developed and ten professional experts working in various departments of Aluminum Composite Panel Industry are asked to answer its questions. The obtained results reveal that in this case, it is a better choice not to implement and develop FMS.

Details

792.

Optimization of continuous ranked probability score using PSO Pages 373-378 Download PDF

Authors: Seyedeh Atefeh Mohammadi, Morteza Rahmani, Majid Azadi

DOI: 10.5267/j.dsl.2015.4.001

Keywords: BFGS, CRPS, PSO, Weather prediction

Abstract:

Weather forecast has been a major concern in various industries such as agriculture, aviation, maritime, tourism, transportation, etc. A good weather prediction may reduce natural disasters and unexpected events. This paper presents an empirical investigation to predict weather temperature using minimization of continuous ranked probability score (CRPS). The mean and standard deviation of normal density function are linear combination of the components of ensemble system. The resulted optimization model has been solved using particle swarm optimization (PSO) and the results are compared with Broyden–Fletcher–Goldfarb–Shanno (BFGS) method. The preliminary results indicate that the proposed PSO provides better results in terms of CRPS deviation criteria than the alternative BFGS method.

Details

793.

Project selection problem under uncertainty: An application of utility theory and chance constrained programming to a real case Pages 373-385 Download PDF

Authors: Behnam Beheshti Pour, Siamak Noori, Reza Hosnavi Atashgah

DOI: 10.5267/j.ijiec.2013.03.006

Keywords: Chance constrained programming, Project selection, Utility theory

Abstract:

Selecting from a pool of interdependent projects under certainty, when faced with resource constraints, has been studied well in the literature of project selection problem. After briefly reviewing and discussing popular modeling approaches for dealing with uncertainty, this paper proposes an approach based on chance constrained programming and utility theory for a certain range of problems and under some practical assumptions. Expected Utility Programming, as the proposed modeling approach, will be compared with other well-known methods and its meaningfulness and usefulness will be illustrated via two numerical examples and one real case.

Details

794.

Measuring the performance of FCM versus PSO for fuzzy clustering problems Pages 387-392 Download PDF

Authors: Hamid Reza Jafari, Amir Reza Soltani, Mohammad Reza Soltani

DOI: 10.5267/j.ijiec.2013.03.005

Keywords: PSO, FCM, Fuzzy clustering, Xie-Beni

Abstract:

Clustering cellular manufacturing plays an important role in many industrial engineering problems. This paper investigates the performance of two methods of heuristic and metaheuristics fuzzy clustering. The proposed method investigates heuristic well-known FCM and particle swarm optimization (PSO) on some well-known benchmarks. We use two criteria of J(P) as well as Xie-Beni to compare the results. Three parameters of PSO method is tuned using design of experiment and then the results of PSO are compared versus FCM method in terms of two mentioned criteria. The proposed models are run for each instance 10 different times and, using ANOVA test, the means of two methods are compared. While the results of ANOVA do not indicate any meaningful difference between PSO and FCM in terms of J(P), we have found some meaningful differences between PSO and FCM in terms of Xie-Beni criterion. In other words, PSO performs better than FCM in terms of Xie-Beni.

Details

795.

Some heuristics for the hybrid flow shop scheduling problem with setup and assembly operations Pages 393-416 Download PDF

Authors: Parviz Fattahi, Seyed Mohammad Hassan Hosseini, Fariborz Jolai

DOI: 10.5267/j.ijiec.2013.03.004

Keywords: Assembly operation, Heuristic, Hybrid flow shop, Scheduling, Setup

Abstract:

This paper presents a two-stage hybrid flow shop scheduling problem with setup and assembly operations. The proposed study of this paper considers one kind of product with a quantity of demand where each product is made by assembling a set of different parts. At first, the parts are manufactured in a two-stage hybrid flow-shop and then the parts are assembled into products on assembly stage. Setup operations are needed when a machine starts processing the parts or it changes items. The considered objective is minimizing the completion time of all products. Since the problem is classified as NP-hard class, a combinatorial algorithm is proposed. The proposed algorithm is a three-step procedure where we use heuristic, genetic algorithm (GA), simulated annealing (SA), NEH and Johnson’s algorithm. Three lower bounds are presented and improved to evaluate the proposed algorithms. An extensive computational experiment is conducted to compare the performances of the proposed algorithms.

Details

796.

An investigation on the effect of supply chain management on innovation: A case study of holding firm Pages 407-410 Download PDF

Authors: Farhad Hanifi, Seyed Mojtaba Mahmoudzadeh, Reza Sheikhi

Keywords: Innovation, Organizational performance, Supply chain management

Abstract:

This paper presents a survey on relationship between supply chain management and innovation in an Iranian holding firm in auto industry named Iran Khodro. The study designs a questionnaire in Likert scale and using random sampling technique, distributes 250 questionnaires among some managers of this holding firm. The study consists of three parts including supply chain management, innovation and organizational performance. The study uses regression technique as well as structural equation modeling and it has detected that there were some strong and positive relationship between supply chain management and innovation. In addition, the result of the survey indicates that there was some positive and meaningful relationship between supply chain management and organizational performance.

Details

797.

An empirical investigation on leanness of production planning Pages 411-416 Download PDF

Authors: Jamshid Salehi Sadaghiani, Hamed pourbakhsh, Hassan khodaei valehzaghard, Pantea Salehi Sadaghiani

Keywords: Lean production, Production planning, Total quality management

Abstract:

One of the most important issues in production planning is to reduce waste materials as much as possible. This helps reduce all necessary expenses and increase productivity and efficiency. This paper presents an empirical investigation to find important factors for reaching lean production planning. The proposed study determines nine different factors including information technology, organization and leadership, human resources development, inventory management, total quality management, process management, equipment management, maintenance engineering. In order to find out the effects of these factors, the study designs a questionnaire and distributes it among some managers in producer of radiator in Iran. Cronbach alpha is equal to 0.86, which validates the questionnaire. Using some statistical observations, the study has confirmed that all mentioned factors influences production planning, positively.

Details

798.

Investigating the effects of personal entrepreneurial characteristics Pages 417-420 Download PDF

Authors: Masoumeh Sadat Abtahi, Mohammadreza Karamipour, Kobra Abbasi

Keywords: Idea fluency, Need to succeed, Personal entrepreneurial characteristics, Pragmatism

Abstract:

This paper presents an empirical investigation to study the impacts of personal entrepreneurial characteristics including “Need to succeed”, “Idea fluency” and “Pragmatism” among students who were enrolled in different fields at Islamic Azad University of Zanjan, Iran. Using a standard questionnaire, which is modified for Iranian culture, the study measures the effects of three factors. The results of Kolmogorov-Smirnov indicate that all three variables of the survey were normally distributed. The results of t-student test for “Need to succeed” is equal to 28.623 with df = 349 and Sig. = 0.000, which is statistically significant. In addition, t-student test for “Idea fluency” is equal to 16.124 with df = 349 and Sig. = 0.000, which is also statistically significant. Finally, the results of t-student test for “Pragmatism” is equal to 31.255 with df = 349 and Sig. = 0.000, which is statistically significant. The findings indicate that the participants hold relatively high level of personal entrepreneurial characteristics.

Details

799.

Surface roughness prediction of particulate composites using artificial neural networks in turning operation Pages 419-424 Download PDF

Authors: Mohammad Ramezani

DOI: 10.5267/j.dsl.2015.3.001

Keywords: Artificial Neural Network (ANN), Composites (PAMCs), Reinforced Aluminum Matrix, Surface Roughness Particulate, Turning

Abstract:

A number of factors, e.g. cutting speed and feed rate, affect the surface roughness in machining process. In this paper, an Artificial Neural Network model was used to forecast surface roughness with related inputs, including cutting speed and feed rate. The output of the ANN model input parameters related to the machined surface roughness parameters. In this research, twelve samples of experimental data were used to train the network. Moreover, four other experimental tests were implemented to test the network. The study concludes that ANN was a reliable and accurate method for predicting machining parameters in CNC turning operation of Particulate Reinforced Aluminum Matrix Composites (PAMCs) specimens with 0%, 5%, 10% and 15% filler. The aim of this work is to decrease the production cost and consequently increase the production rate of these materials for industry without any trial and error method procedure.

Details

800.

A study on the effect of green marketing on consumers’ purchasing intention Pages 421-424 Download PDF

Authors: Mehdy Fallah, Mohammad Reza Ebrahimi

Keywords: Consumers’ purchasing intention, Dairy industry, Green Management

Abstract:

During the past two decades, there have been significant damages on environment such as ozone layer depletion, global warming effects, etc. and people are getting more concerned about taking necessary actions to help environment. The purpose of this paper is to study the effect of green marketing on consumers’ purchasing intention in dairy industry. The proposed study designs a questionnaire and distributes it among 154 randomly selected people who purchase dairy products in four different regions of city of Babol, located in north region of Iran. Using structural equation modeling, the study has detected that green marketing influences on consumers’ purchasing intention, positively.

Details

Previous Next