Volume 9, Issue 1
مرور بر اساس
ارسال های اخیر
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Forecasting S&P 500 index using artificial neural networks and design of experiments
(Islamic Azad University, South Tehran Branch, 2013-12-01)The main objective of this research is to forecast the daily direction of Standard & Poor's 500 (S&P 500) index using an artificial neural network (ANN). In order to select the most influential features (factors) of the ...
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The analysis of residuals variation and outliers to obtain robust response surface
(Islamic Azad University, South Tehran Branch, 2013-12-01)In this paper, the main idea is to compute the robust regression model, derived by experimentation, in order to achieve a model with minimum effects of outliers and fixed variation among different experimental runs. Both ...
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Simultaneous robust estimation of multi-response surfaces in the presence of outliers
(Islamic Azad University, South Tehran Branch, 2013-12-01)A robust approach should be considered when estimating regression coefficients in multi-response problems. Many models are derived from the least squares method. Because the presence of outlier data is unavoidable in most ...
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A multi-objective model for designing a group layout of a dynamic cellular manufacturing system
(Islamic Azad University, South Tehran Branch, 2013-12-01)This paper presents a multi-objective mixed-integer nonlinear programming model to design a group layout of a cellular manufacturing system in a dynamic environment, in which the number of cells to be formed is variable. Cell ...
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Strategy-aligned fuzzy approach for market segment evaluation and selection: a modular decision support system by dynamic network process (DNP)
(Islamic Azad University, South Tehran Branch, 2013-12-01)In competitive markets, market segmentation is a critical point of business, and it can be used as a generic strategy. In each segment, strategies lead companies to their targets; thus, segment selection and the application ...
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A multi-period distribution network design model under demand uncertainty
(Islamic Azad University, South Tehran Branch, 2013-12-01)Supply chain management is taken into account as an inseparable component in satisfying customers' requirements. This paper deals with the distribution network design (DND) problem which is a critical issue in achieving ...
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Phase II monitoring of auto-correlated linear profiles using linear mixed model
(Islamic Azad University, South Tehran Branch, 2013-12-01)In many circumstances, the quality of a process or product is best characterized by a given mathematical function between a response variable and one or more explanatory variables that is typically referred to as profile. ...
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An application of principal component analysis and logistic regression to facilitate production scheduling decision support system: an automotive industry case
(Islamic Azad University, South Tehran Branch, 2013-12-01)Production planning and control (PPC) systems have to deal with rising complexity and dynamics. The complexity of planning tasks is due to some existing multiple variables and dynamic factors derived from uncertainties ...
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Network DEA: an application to analysis of academic performance
(Islamic Azad University, South Tehran Branch, 2013-12-01)As governmental subsidies to universities are declining in recent years, sustaining excellence in academic performance and more efficient use of resources have become important issues for university stakeholders. To assess ...
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Allocation models for DMUs with negative data
(Islamic Azad University, South Tehran Branch, 2013-12-01)The formulas of cost and allocative efficiencies of decision making units (DMUs) with positive data cannot be used for DMUs with negative data. On the other hand, these formulas are needed to analyze the productivity ...
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A heuristic method for consumable resource allocation in multi-class dynamic PERT networks
(Islamic Azad University, South Tehran Branch, 2013-12-01)This investigation presents a heuristic method for consumable resource allocation problem in multi-class dynamic Project Evaluation and Review Technique (PERT) networks, where new projects from different classes (types) ...
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Optimisation of shock absorber process parameters using failure mode and effect analysis and genetic algorithm
(Islamic Azad University, South Tehran Branch, 2013-12-01)The various process parameters affecting the quality characteristics of the shock absorber during the process were identified using the Ishikawa diagram and by failure mode and effect analysis. The identified process ...
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Incorporating location, routing, and inventory decisions in a bi-objective supply chain design problem with risk-pooling
(Islamic Azad University, South Tehran Branch, 2013-12-01)This paper considers a single-sourcing network design problem for a three-level supply chain. For the first time, a novel mathematical model is presented considering risk-pooling, the inventory existence at distribution ...
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Analysis of unreliable bulk queue with statedependent arrivals
(Islamic Azad University, South Tehran Branch, 2013-12-01)In this paper, we investigate a single-server Poisson input queueing model, wherein arrivals of units are in bulk. The arrival rate of the units is state dependent, and service time is arbitrary distributed. It is also ...
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Behavioral study of piston manufacturing plant through stochastic models
(Islamic Azad University, South Tehran Branch, 2013-12-01)Piston plays a vital role in almost all types of vehicles. The present study discusses the behavioral study of a piston manufacturing plant. Manufacturing plants are complex repairable systems and therefore, it is difficult ...
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Finding efficient frontier of process parameters for plastic injection molding
(Islamic Azad University, South Tehran Branch, 2013-12-01)Product quality for plastic injection molding process is highly related with the settings for its process parameters. Additionally, the product quality is not simply based on a single quality index, but multiple interrelated ...
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Mahalanobis-Taguchi System-based criteria selection for strategy formulation: a case in a training institution
(Islamic Azad University, South Tehran Branch, 2013-12-01)The increasing complexity of decision making in a severely dynamic competitive environment of the universe has urged the wise managers to have relevant strategic plans for their firms. Strategy is not formulated from ...
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Optimizing the warranty period by cuckoo meta-heuristic algorithm in heterogeneous customers’ population
(Islamic Azad University, South Tehran Branch, 2013-12-01)Warranty is now an integral part of each product. Since its length is directly related to the cost of production, it should be set in such a way that it would maximize revenue generation and customers' satisfaction. ...
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Threshold F-policy and N-policy for multi-component machining system with warm standbys
(Islamic Azad University, South Tehran Branch, 2013-12-01)The integration of marketing and demand with logistics and inventories (supply side of companies) may cause multiple improvements; it can revolutionize the management of the revenue of rental companies, hotels, and airlines. ...
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A neuro-data envelopment analysis approach for optimization of uncorrelated multiple response problems with smaller the better type controllable factors
(Islamic Azad University, South Tehran Branch, 2013-12-01)In this paper, a new method is proposed to optimize a multi-response optimization problem based on the Taguchi method for the processes where controllable factors are the smaller-the-better (STB)-type variables and the ...
