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排序方式: 共有457条查询结果,搜索用时 31 毫秒
71.
Leiber Daria Eickholt David Vuong Anh-Tu Reinhart Gunther 《Journal of Intelligent Manufacturing》2022,33(2):537-554
Journal of Intelligent Manufacturing - This article presents a novel approach for the automated 3D-layout planning of multi-station assembly lines. The planning method is based on a comprehensive... 相似文献
72.
Athanassios Ziogas Christian Hofmann Sebastian Baranyai Patrick Löb Gunther Kolb 《化学,工程师,技术》2020,92(5):513-524
A novel flexible electrochemical microreactor has been developed. Flexibility is reached by a modular design, suitability for a broad process parameter range including high pressure operation, and accessibility of production scale. Selected reactor aspects have been validated by applying the reactor to three different electrosyntheses: synthesis of tailor-made mixtures of paraffins by Kolbe electrolysis, cation flow method, and synthesis of peroxodicarbonate. High conversion rates, yields, selectivities, and Faraday efficiency levels have been observed, showing precise process control. 相似文献
73.
Schröder Jakob Evans Alexander Polatidis Efthymios Čapek Jan Mohr Gunther Serrano-Munoz Itziar Bruno Giovanni 《Journal of Materials Science》2022,57(31):15036-15058
Journal of Materials Science - The manufacturability of metallic alloys using laser-based additive manufacturing methods such as laser powder bed fusion has substantially improved within the last... 相似文献
74.
Yong Men Hubert Gnaser Christiane Ziegler Ralf Zapf Volker Hessel Gunther Kolb 《Catalysis Letters》2005,105(1-2):35-40
Thermal desorption spectroscopy (TDS) under ultra high vacuum (UHV) condition has been used to investigate the desorption
characteristics of Cu/CeO2/γ-Al2O3 thin film catalysts coated onto the microchannel of a microreactor. TDS results demonstrate that surface desorption profiles
and chemical properties (acid–base and redox properties) are remarkably influenced by the catalyst composition, i.e. the loading
of copper and ceria. The enhanced basicity with the increase of ceria loading and the decrease of copper loading is evident
from the shifted desorption maximum of CO2 in TDS spectra. Three oxygen species, ranging from weakly bound oxygen desorbed at low temperature to the strongly held lattice
oxygen desorbed at high temperature, are easily discernible and clearly identified by O2 TDS spectra, depending on the catalyst compositions. The concomitant thermal desorption of O2, CO2, and H2O at low temperature indicates the unique chemical properties of copper/ceria catalyst with appropriate copper and ceria contents.
The observed low-temperature feature is ascribed to the role of porthole of copper/ceria interfacial area for several desorbed
species. The weakly bound oxygen species is attributed to the enhanced abundance of copper/ceria interfacial anionic vacancies
created by the intimate contact between copper and ceria entities and its impact on steam reforming of methanol (SRM) reaction
is tentatively discussed in terms of reverse oxygen spillover. 相似文献
75.
Abstract. This article analyses participation in the annual European congresses of the Regional Science Association (ERSA) from 1998 through 2003. We formulate goals that the ERSA conferences should aim at and based on these aims we formulate hypotheses about conference participation. In the empirical part we test hypotheses with regard to the spatial distribution of the participants over countries, the distribution of the frequency of attendance among the participants, and the presence of distance decay in participation. All hypotheses are confirmed. We also pay attention to the relation between the frequency of attendance and distance. In the conclusions we derive implications for future conferences. 相似文献
76.
Thomas Fetz Michael Oberguggenberger Johannes Jager David Koll Gunther Krenn Heimo Lessmann & Rudolf F. Stark 《Computer-Aided Civil and Infrastructure Engineering》1999,14(2):93-106
This article is devoted to a variety of applications of fuzzy models in civil engineering, presenting the current work of a group of researchers at the University of Innsbruck. With fuzzy methods and possibility theory as an encompassing framework, the following areas are addressed: uncertainties in geotechnical engineering, fuzzy finite‐element computation of a foundation raft, fuzzy dynamic systems, and processing uncertainty in project scheduling and cost planning. 相似文献
77.
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79.
Dalhaus RN Gunther KL 《Journal of the Optical Society of America. A, Optics, image science, and vision》2012,29(2):A298-A305
In a color naming task from 0° to 55° eccentricity, we found that red/green performance (n=10 subjects) declines around 40° eccentricity, 5° earlier than does tritan performance (main effect of color, p=0.009; eccentricity, p<0.001; interaction, p=0.005). In a feature visual search task (e.g., red target dot among green distractor dots; twelve 2.5° diameter dots; 0, 20, and 45° eccentricity; 12 subjects), performance was significantly more impaired for red/green than for tritan stimuli, especially in the periphery (main effect of color, p=0.007; eccentricity, p<0.001; interaction, p=0.003). This effect occurred even following a rod bleach. Our results are consistent with influences from both the retina (especially random rather than selective peripheral cone input to midget ganglion cells for red/green perception, and selective cone input to small bistratified cells for tritan perception) and the cortex (differential cortical magnification across the two chromatic axes). 相似文献
80.
Muhammad Z. Ahmad Vladimir B. Golovko Rohul H. Adnan Faridah Abu Bakar Jan-Yves Ruzicka David P. Anderson Gunther G. Andersson Wojtek Wlodarski 《International Journal of Hydrogen Energy》2013
Controlled amounts of chemically synthesised gold (Au) nanoclusters were deposited onto tungsten trioxide (WO3) nanostructured thin films as sensors for hydrogen. The Au/WO3 thin films were characterised by XPS, XRD, SEM and TEM. Performance of Au/WO3 films was tested at operating temperatures varying from room temperature to 450 °C. It was demonstrated that Au metal loading plays an important role in defining enhancement of the sensor response towards hydrogen. “Less is more” principle applies to the reported here sensors as materials made using lower concentration of Au nanoclusters demonstrated significantly better response. HRTEM images of the Au/WO3 thin films provide evidence that the more active sensors are enriched with smaller Au nanoparticles (≤5 nm). Fast response towards H2 within a wide range of industrially relevant concentrations, excellent baseline stability and signal reproducibility at optimized operating temperature demonstrate feasibility of this novel approach toward fabrication of sensors. 相似文献