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Content available Electromagnetic processing of molten copper alloys in the induction furnace with cold crucible
Smalcerz Albert, Blacha Leszek, Barglik Jerzy, Dolezel Ivo, Wieczorek Tadeusz
Archives of Electrical Engineering
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2024
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Vol. 73, nr 1
51--62
EN
Electromagnetic processing of molten copper is provided in a special kind of electrical furnace called an induction furnace with a cold crucible (IFCC), making it possible to successfully remove impurities from the workpiece. In order to analyze the process in a sufficient way not only electromagnetic, thermal and flow but also metallurgical and mass transfer phenomena in the coupled formulation should be taken into consideration. The paper points to an analysis of the kinetic process of lead evaporation from molten copper. It was shown that mass transport in the gas phase determines the rate of the analyzed evaporation process. The possibility of removal of lead from molten copper is analyzed and described.
2
Content available Analysis of modification of the evolutionary algorithm for sequencing production tasks
Ciepliński Piotr, Golak Sławomir, Wieczorek Tadeusz
Computer Methods in Materials Science
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2022
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Vol. 22, No. 3
157--166
EN
Evolutionary algorithms are one of the heuristic techniques used to solve task sequencing problems. An important example of such a problem is the issue of sequencing production tasks. The combinatorial optimization of task sequences allows the minimization of the cost or time of a set of production tasks by reducing the components of these values which are present in the transitions between tasks. This paper aims to analyze the influence of the production nature expressed by a set of production task parameters and a definition of the task transition cost on the effectiveness of the modification of the evolutionary algorithm based on new directed stochastic mutation operators. The research carried out included the influence of the space dimension of the task parameters, the number of levels of the value of the cost function, and a definition of this function. The results obtained allow us to assess the effectiveness of the directed mutation in task sequencing for productions of various natures.
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Content available remote Wzrastające wymagania wobec analityków i informatyków w analityce współbieżnej w laboratoriach badawczych
Gajdzik Bożena, Wyciślik Andrzej, Wieczorek Tadeusz
Przemysł Chemiczny
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2020
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T. 99, nr 4
496--501
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