Prediction of the production rate of the cutting dimensional stone process is crucial, especially when chain saw machines are used. The cutting dimensional rock process is generally a complex issue with numerous effective factors including variable and unreliable conditions of the rocks and cutting machines. The Group Method of Data Handling (GMDH) type of neural network and Radial Basis Functi...

The dependence of our society on complex networks constantly grows with the worldwide increase in urbanization and globalization. As a result there is an increasing demand for understanding the behaviour of these networks. In particular, the probabilities of extreme events (rareoccurrence, high-impact) must be accurately estimated. In this work, a new Markov chain Monte Carlo method for efficie...

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the aim of this study was to represent effective componentsin demand chain which help organizations attain high performance levelsthrough identification of these components and determining theirdegree of importance. the following questions were major ideas of thisstudy: what are the most effective components in demand chain? andhow are they effective on organizational performance? to this end,m...

Research on Lean indicates that its association with performance improvement, although compelling, is not uniformly positive. Prior researchers have posited plants implementing may become too lean or only implement selected aspects without fully embracing Lean’s synergistic prescriptions. We explore another potential reason for lower-than-expected sometimes associated Lean: supply chain complex...

investors use different approaches to select optimal portfolio. so, optimal investment choices according to return can be interpreted in different models. the traditional approach to allocate portfolio selection called a mean - variance explains. another approach is markov chain. markov chain is a random process without memory. this means that the conditional probability distribution of the nex...

in a complex and volatile environment of the supply chain, any attempt to reduce the risks may increase or decrease other risks; thus, achieving an overall picture of the risks of supply chain and relationships between them are necessary and will lead to more effective and comprehensive strategy to response to risks. the purpose of this paper is identifying and extracting the potential risks of...