In this work is presented the application of qualitative models and statistical methods in quality control of production procedures of various components of an automatic industrial press machine. The methodology of creating a descriptive model of a manufacturing process is presented using qualitative methods of description and a qualitative modeling and simulation application (QMTOOL). The simu...

Removing unit productions from LR parsing machines can reduce the space and time cost of parsing. The unit production elimination algorithm of Pager may result in redundant states in the generated parsing machine. This work introduces an extension to remove the redundancy and thus minimize the parsing machine. We implemented the unit production elimination algorithm and its extension algorithm ...

The main objective of this paper is to cover the first stage of a real time optimization project for a cyclohexanol production multiphase reactor. Firstly, the optimization problem is stated and the upper layer of a two layers real time optimization approach is solved off-line. Some equations of the steady state process model show to yield a difficult NLP. The mathematical steady state model is...

Economic needs and the ongoing liberalization of European electricity markets stimulate the interest of power utilities in developing models and optimization techniques for the generation and trading of electric power under uncertainty. Utilities participating in deregulated markets observe increasing uncertainty in load (i.e., demand for electric power) and prices for fuel and electricity on s...

Aboveground production in terrestrial plant communities is commonly expressed in amount of carbon, or biomass, per unit surface. Alternatively, expressing production per unit volume allows the comparison of communities by their fundamental capacities in packing carbon. In this work we reanalyzed published data from more than 900 plant communities across nine ecosystems to show that standing dry...

recently, lotfi et al. [10] established an equivalence model between the output-oriented dual ccr model and multiple objective linear programming (molp) and used an interactive method for finding target unit on efficiency frontier such that the decision maker preferences can be taken into account. however their method is not applicable for situations in which some outputs are undesirable and ne...

In spoken word production, a proximate unit is the first phonological unit at the sublexical level that is selectable for production (O'Seaghdha et al., 2010). The present study investigated whether the proximate unit in Chinese handwritten character production is the stroke, the radical, or something in between. A written version of the form preparation task was adopted. Chinese participants l...

Introduction: Unit risk management is a critical component of gas refining management, as risks that are not well-managed may lead to trip production failures. The present study aimed to provide a structural model for investigating the role and effect of different variables on stopping the gas production process in the gas refinery. Material and Methods: This study was a retrospective cross-se...

An economic analysis of a bio-gasification facility requires an understanding of its syngas production cost. The objectives of this study were to develop a Cost Analysis Model (CAM) to determine the costs associated with syngas production at different production capacities. The CAM was developed using on a graphical user interface (GUI) programmed in Microsoft Visual Studio 2008 software, mathe...

In this paper we deal with the integrated supply chain management problem in the context of a single vendorsingle buyer system for which the production unit is assumed to randomly shift from an in-control to an out-of-control state. At the end of each production cycle, a corrective or preventive maintenance action is performed, depending on the state of the production unit, and a new setup is c...