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101.
Alexander Gredner Christoph Gerhard Stephan Wieneke Kai Schmidt Wolfgang Viol 《材料科学与工程:中英文B版...》2013,(6):346-351
In this work, a novel atmospheric pressure plasma-assisted excimer laser annealing method for increasing the generation efficiency of poly-crystalline silicon from amorphous silicon layers is presented. Here, both the plasma and the laser propagate coaxially in order to generate energetic synergies. The influence of different process gases and plasma discharge modes as well as the working distance were investigated. Depending on the particularly applied plasma, the crystalline area was increased by a factor of approx. 1.1 to 1.9, where the highest efficiency was observed when introducing an argon plasma beam to the annealing process. 相似文献
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Dipl.-Ing. Christoph Triebl Christoph Spijker Harald Raupenstrauch Alexander Jarosik Gerhard Angeli 《BHM Berg- und Hüttenm?nnische Monatshefte》2014,159(7):310-311
For the production of high-quality goods in industrial furnaces using minimal expenditure of energy, optimization of the process parameters is required. One tool for improving the processes economically is the simulation of the furnaces by using Computational Fluid Dynamics (CFD). The pre-heating process of a steel strip in a section of an annealing furnace for surface treatment in a hot-dip galvanizing process was simulated using the commercial CFD software Ansys Fluent 15.0. For combustion, the Equilibrium model is used, turbulence is modeled by the realizable-k-ε model, and radiation is taken into account by using the Discrete Ordinate Method (DOM). 相似文献
104.
Order picking (OP) is one of the most labour- and time-intensive processes in internal logistics. Over the last decades, researchers have developed various mathematical planning models that help to increase the efficiency of OP systems, for example, by optimising storage assignments or by specifying routes for the order pickers that minimise travel distance in the warehouse. Human characteristics that are often a major determinant of OP system performance have, however, widely been ignored in this stream of research. This paper systematically evaluates the literature on manual OP systems and conducts a content analysis to gain insights into how human factors (HF) have been considered and discussed in the scientific literature. The results of the analysis indicate that management-oriented efficiency criteria dominated prior research on OP, and that there is a clear lack of attention to HF in the design and management of OP systems. This poses an opportunity for research and design of manual OP systems. 相似文献
105.
Data warehouses (DW) form the backbone of data integration that is necessary for analytical applications, and play important roles in the information technology landscape of many industries. We introduce an approach for addressing the fundamental problem of semantic heterogeneity in the design of data integration requirements during DW development. In contrast to ontology-driven or schema-matching approaches, which propose the automatic resolution of differences ex-post, our approach addresses the core problem of data integration requirements: understanding and resolving different contextual meanings of data fields. We ground the approach firmly in communication theory and build on practices from agile software development. Besides providing relevant insights for the design of data integration requirements, our findings point to communication theory as a sound underlying foundation for a design theory of information systems development. 相似文献
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Christoph Beierle Carlo Meghini 《Annals of Mathematics and Artificial Intelligence》2016,76(3-4):247-249
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Ein international erfolgreiches Schema für Cybersicherheits-Zertifizierungen bedarf akzeptierter und implementierter Sicherheitsstandards. Dieser Artikel erörtert kritisch die komplexen Anforderungen hinsichtlich der Vollständigkeit, Dynamik und Durchsetzung aus europäischer Perspektive und zeigt am Beispiel der eIDAS-Verordnung die Herausforderungen bei der Umsetzung auf. 相似文献
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