A characterization of the roots of the 3x3 median filter is given. We define the properties of local smoothness and of local roughness for the roots of the 3x3 median filter. Roots that are locally rough everywhere are binary and periodic; otherwise, unlike the 1D case, a root may be non binary or non periodic. This partially generalizes to dimension 2 the results of Brandt [1] and Tyan [2]; in...

in this paper, a multi-product single machine scheduling problem with the possibility of producing defected jobs, is considered. we concern rework in the scheduling environment and propose a mixed-integer programming (mip) model for the problem.  based on the philosophy of just-in-time production, minimization of the sum of earliness and tardiness costs is taken into account as the objective fu...

maximizing economic earnings is the most common goal in cut-off grade optimization of open-pit mining operations. when this is the case, the price of the product has a critical effect on optimum value of cut-off grade. this paper investigates the relationship between optimum cut-off grade and price to maximize total cash flow and net percent value (npv) of operation. in order to visualize this ...

risk assessment and management of petrochemical feed and product transportation pipelines is very important to preventing probable accidents. so, 60 pipelines evaluated by chemical exposure index and chlorine pipeline due to high hazard distances selected for relative risk analysis. the chlorine pipeline with 3468 meter length divided to 100 meter sections, and third party damage index (tpdi), ...

In this paper we study an assembly system which supplies an end-product inventory. We allow assembly operation times to be G.I. distributed and analyze the system as a Markov renewal process, deriving a closed-form expression for long-run Palm probabilities of both kit and end-product inventory positions. We then present a numerical procedure to obtain various performance measures using the mat...

Processes with only one output being controlled by a single manipulated variable are classified as single-input single-output (SISO) systems. Many processes, however, do not conform to such a simple control configuration. In the process industries for example, any unit operation capable of manufacturing or refining a product cannot do so with only a single control loop. In fact, each unit opera...

background and objective: sinusitis is one of the most common hygienic problems and a large part of the budget has been allocated to its diagnosis and treatment yearly. in this study, the presence of cytomegalovirus in sinuses of patients, undergone operation for treatment, with or without sinusitis, was studied. materials and methods: this study was an applied and case-control study, which had...

Privacy-preserving data mining seeks to empower conventional data mining techniques with the desirable property of preserving data privacy during the mining process. Given existing approaches on privacy-preserving decision tree induction for horizontally and vertically partitioned data involving multiple parties, we extend current work to multiple parties holding arbitrarily partitioned data. A...

3,4-dihydropyrimidin-2(1h)-thiones were synthesized in the presence of ag nanoparticle/melamine sulfonic acid (msa) supported on silica gel. the reaction was carried out at 110 oc for 20 min under solvent free conditions. in all cases, the three component reaction proceeded smoothly to give the corresponding 3,4-dihydropyrimidin-2(1h)-thiones in moderate to good yield. we have found the best co...