Institution
Wrocław University of Technology
Education•Wrocław, Poland•
About: Wrocław University of Technology is a education organization based out in Wrocław, Poland. It is known for research contribution in the topics: Laser & Computer science. The organization has 13115 authors who have published 31279 publications receiving 338694 citations.
Topics: Laser, Computer science, Catalysis, Adsorption, Quantum dot
Papers published on a yearly basis
Papers
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TL;DR: In this article, the influence of the sputtering technology (reactive gas partial pressure, magnetic field intensity) on the power supply parameters has been investigated, and the reactive sputtering of aluminium target in Ar + O 2 atmosphere has been used as an example.
87 citations
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TL;DR: In this paper, the authors investigated the relationship between laser powder bed fusion (LPBF) parameters and defect formation with a focus on hot cracking and discussed the process window for the LPBF manufacturing of defect-free components of AA7075 alloy.
Abstract: Laser powder bed fusion (LPBF) is an attractive technology of manufacturing high-strength aluminium alloy parts for the aircraft and automobile industries, limited by poor processability of these alloys. This work was aimed at finding the process window for the LPBF manufacturing of defect-free components of AA7075 alloy. Optimization of the parameters was performed at each stage of the multi-stage research, i.e. for single tracks, thin walls and volumetric specimens. At each stage, the relation between LPBF parameters and defect formation with a focus on hot cracking was investigated and discussed. Due to the optimization of process parameters, the density of volumetric specimens above 99 % was reached and vaporization losses of the alloying elements were significantly reduced, but solidification cracks could not be eliminated. It was found that solidification cracks were formed by the liquid film rupture mode, mainly along columnar grain boundaries. The EDS microanalysis showed intergranular microsegregation, not only of the main alloying elements (Zn, Mg, Cu) but also of minor elements such as Si. Silicon may play a significant role in increasing susceptibility to cracking by increasing the stability of the liquid film. Reduction in the silicon impurity content in the AA7075 powder gives a chance to reduce susceptibility to cracking with no change of the alloy specification.
87 citations
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TL;DR: An analysis of the interaction energy components for the systems considered indicates that the covalent character of the hydrogen bond is manifested by a markedly increased contribution of the delocalization term relative to the electrostatic interaction energy.
Abstract: The N−H···O hydrogen bonds are analyzed for formamide dimer and its simple fluorine derivatives representing a wide spectrum of more or less covalent interactions. The calculations were performed at the MP2/6-311++G(d,p) level of approximation. To explain the nature of such interactions, the Bader theory was also applied, and the characteristics of the bond critical points (BCPs) were analyzed: the electron density at BCP and its Laplacian, the electron energy density at BCP and its components, the potential electron energy density, and the kinetic electron energy density. These parameters are used to justify the statement that some of the interactions analyzed are partly covalent in nature. An analysis of the interaction energy components for the systems considered indicates that the covalent character of the hydrogen bond is manifested by a markedly increased contribution of the delocalization term relative to the electrostatic interaction energy. Moreover, the ratio of stabilizing the delocalization/e...
86 citations
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TL;DR: A model predictive controller for the position control of an electrical drive with an elastic connection that enables the drive's safety and physical limitations to be directly incorporated into control synthesis.
Abstract: In this paper, a model predictive controller for the position control of an electrical drive with an elastic connection is presented. The control methodology enables the drive's safety and physical limitations to be directly incorporated into control synthesis. The effect of the predictive horizon on the drive performance is examined. Also, the influence of parameter changes is tested in this paper. The simulation study is supported by experimental results.
86 citations
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TL;DR: A novel way for condition monitoring of planetary gearboxes based on multivariate statistics is suggested and the emphasis is put on the algebraic and geometric interpretations of the PCA.
86 citations
Authors
Showing all 13239 results
Name | H-index | Papers | Citations |
---|---|---|---|
Krzysztof Palczewski | 114 | 631 | 46909 |
Claude B. Sirlin | 98 | 475 | 33456 |
Marek Czosnyka | 88 | 747 | 29117 |
Alfred Forchel | 85 | 1358 | 34771 |
Jerzy Leszczynski | 78 | 993 | 27231 |
Kim R. Dunbar | 74 | 470 | 20262 |
Massimo Olivucci | 67 | 292 | 14880 |
Nitesh V. Chawla | 61 | 388 | 41365 |
Edward R. T. Tiekink | 60 | 1967 | 21052 |
Bobby G. Sumpter | 60 | 619 | 23583 |
Wieslaw Krolikowski | 59 | 504 | 12836 |
Pappannan Thiyagarajan | 59 | 245 | 10650 |
Marek Samoc | 58 | 401 | 11171 |
Lutz Mädler | 58 | 232 | 27800 |
Rafał Weron | 58 | 285 | 12058 |