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Innovative manufacturing technology enabling light weighting with steel in commercial vehicles

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Advances in Manufacturing 2015年第1期3卷 3-18页

作者： Hardy Mohrbacher Marius Spottl Jesse Paegle NiobelCon bvba SchildeBelgium WISCO Lasertechnik gmbh RavensburgGermany Gestamp Sao PauloBrazil

Improved manufacturing technology is often needed when working with high strength steel. In this re- spect manufacturing technology has to adapt to the altered （and typically reduced） formability and weldability of modern high strength steel. However, this is a rather passive approach from a manufacturing point of view. An indeed much more powerful approach is to generate synergies between innovative manufacturing technology, design and material enabling additional weight savings and efficiency gains. Laser-based material processing, in particular laser welding, offers a wide range of opportunities in this sense. Furthermore, hot stamping and roll forming open up new possibilities for advanced manufacturing of commercial vehicle components. Applications and examples of these technologies will be given in terms of producing innovative semi-products as well as final components.

关键词： Commercial vehicles . Light weightingstrength steel . Roll forming - Press forming - Hotstamping . Tailor-welded blanks .Tailor-welded coils

Reliable off-grid power supply utilizing green hydrogen

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Clean Energy 2021年第3期5卷 441-446页

作者： Oliver Borm Stephen B.Harrison sbh4 gmbh Kranzlstraße 2182538 GeretsriedGermany

Green hydrogen produced from wind,solar or hydro power is a suitable electricity storage *** is typically employed as mid-to long-term energy storage,whereas batteries cover short-term energy *** hydrogen can be produced by any available electrolyser technology[alkaline electrolysis cell(AEC),polymer electrolyte membrane(PEM),anion exchange membrane(AEM),solid oxide electrolysis cell(SOEC)]if the electrolysis is fed by renewable *** the electrolysis operates under elevated pressure,the simplest way to store the gaseous hydrogen is to feed it directly into an ordinary pressure vessel without any external *** most efficient way to generate electricity from hydrogen is by utilizing a fuel *** fuel cells seem to be the most favourable way to do *** increase the capacity factor of fuel cells and electrolysers,both functionalities can be integrated into one device by using the same *** this article,different reversible technologies as well as their advantages and readiness levels are presented,and their potential limitations are also discussed.

关键词： green hydrogen microgrid stand-alone power system SAPS hydrogen storage electrolysis fuel cells AEC PEM AEM SOEC

Growth performance, nutrient digestibility, antioxidant capacity,blood biochemical biomarkers and cytokines expression in broiler chickens fed different phytogenic levels

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Animal Nutrition 2017年第2期3卷 114-120页

作者： Vasileios Paraskeuas Konstantinos Fegeros Irida Palamidi Christine Hunger Konstantinos C.Mountzouris Department of Nutritional Physiology and Feeding.Agricultural University of Athens BIOMIN Holding gmbh

The effects of inclusion levels of a phytogenic feed additive(PFA), characterized by menthol anethol and eugenol, on broiler growth performance, nutrient digestibility, biochemical biomarkers and total antioxidant capacity(TAC) of plasma and meat, as well as on the relative expression of selected cytokines,were studied in a 42-d experiment. A total of 225 one-day-old male Cobb broiler chickens were assigned into 3 treatments, with 5 replicates of 15 chickens each. Chickens were fed maize-soybean meal basal diets following a 3 phase(i.e., starter, grower and finisher) feeding program. Depending on PFA inclusion level, treatments were: no PFA(PFA-0), PFA at 100 mg/kg(PFA-100) and PFA at 150 mg/kg(PFA-150).Feed and water were available ad libitum. Feed conversion ratio(FCR) during finisher phase was improved quadratically(P < 0.05) with increasing PFA level. Overall, increasing PFA level increased body weight gain(BWG) in a linear(P < 0.05) and quadratic(P < 0.05) manner with treatments PFA-100 and PFA-150 being greater(P < 0.05) compared with PFA-0. Total tract apparent digestibility of dry matter increased linearly(P < 0.05) and quadratically(P < 0.05) with increasing PFA level. The apparent metabolizable energy corrected for nitrogen(AMEn) also increased linearly(P < 0.05). Increasing PFA level resulted in a linear(P < 0.05) increase in blood plasma TAC. Expression of pro-inflammatory cytokine interleukin-18(IL-18) was reduced linearly(P < 0.05) in spleen with increasing PFA level. In conclusion, PFA inclusion at 100 mg/kg diet positively influenced performance, whereas PFA inclusion at150 mg/kg resulted in a stronger improvement in AMEn and plasma TAC. Finally, PFA inclusion resulted in a pattern of reduced pro-inflammatory biomarker IL-18 at spleen. Overall, this study provides evidence for the beneficial role of PFA as a natural growth and health promoter in broiler chickens that needs to be further confirmed in field studies.

关键词： Chicken Phytogenic Antioxidant Menthol Anethol Eugenol

***-an interactive climate analysis web platform

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International Journal of Digital Earth 2021年第3期14卷 338-356页

作者： Laura Zepner Pierre Karrasch Felix Wiemann Lars Bernard Chair of Geoinformatics Technische Universität DresdenDresdenGermany AED-SICAD gmbh BonnGermany

This article describes the conception and implementation of a web platform which uses special charts and maps for climate monitoring and *** first it gives an overview of related web applications and their advantages and *** is followed by a basic introduction of current technologies and methods for working with climate data,geospatial web services and visualization ***,the implementation based on prior defined requirements is presented and its strengths and limitations are *** application provides several basic charts for climate analysis,as well as a more complex one which uses a standardized visualization concept which is suitable for comparing different local climates(Walter-LiethStandard).The charts are based on different interpolated datasets with global coverage as well as data from the Global Historical Climate Network(GHCN).Overall,the application enables users to generate individual historical climate charts from the beginning of the twentieth century until present day.

关键词： Climate monitoring WalterLieth charts Köppen-Geiger classification user interface design education information visualization

Bethe-Salpeter equations: mesons beyond the rainbow-ladder truncation

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Chinese Physics C 2010年第9期34卷 1500-1503页

作者： Richard Williams Christian S.Fischer Institute for Nuclear Physics Darmstadt University of Technology GSI Helmholtzzentrum für Schwerionenforschung gmbh

We investigate masses of light mesons from a coupled system of Dyson–Schwinger （DSE） and Bethe– Salpeter equations （BSE）,taking into account dominant non-Abelian,sub-leading Abelian,and dominant pion cloud contributions to the dressed quark-gluon *** axial-vector Ward-Takahashi identity preserving Bethe-Salpeter kernel is constructed and the spectrum of light mesons *** model goes significantly beyond the *** find that sub-leading Abelian corrections are further dynamically suppressed,and that our results supersede early qualitative predictions from simple truncation schemes.

关键词： Dyson-Schwinger equations Bethe-Salpeter equations light-mesons beyond rainbow-ladder

Technologies for Compensation or Mitigation of Transmission Impairments in Future High-Speed Optical Networks

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光学学报 2003年第S1期23卷 625-626页

作者： W.Weiershausen S.Vorbeck T-Systems Nova gmbh Technologiezentrum D-64307 Darmstadt GermanyT-Systems Nova GmbH Technologiezentrum D-64307 Darmstadt Germany

The presentation will give an overview over different classes of signal impairments in ultra-long-haul and high-speed optical WDM transmission systems and adequate approaches for suppression, mitigation or compensatio... 详细信息

关键词： for on it Technologies for Compensation or Mitigation of Transmission Impairments in Future High-Speed Optical Networks of PMDC in OSNR EDFA OADM FEC that be

Quantitative Multi-Layer Electromagnetic Induction Inversion and Full-Waveform Inversion of Crosshole Ground Penetrating Radar Data

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Journal of Earth Science 2015年第6期26卷 844-850页

作者： Jan van der Kruk Nils Gueting Anja Klotzsche Guowei He Sebastian Rudolph Christian von Hebel Xi Yang Lutz Weihermüller Achim Mester Harry Vereecken Agrosphere (IBG-3) Forschungszentrum Jülich GmbH Centre for High-Performance Scientific Computing in Terrestrial Systems (TerrSys) British Geological Survey Environmenal Science Centre Key Worth Electronic Systems (ZEA-2) Forschungszentrum Jülich GmbH

Due to the recent system developments for the electromagnetic characterization of the subsurface, fast and easy acquisition is made feasible due to the fast measurement speed, easy coupling with GPS systems, and the availability of multi-channel electromagnetic induction（EMI） and ground penetrating radar（GPR） systems. Moreover, the increasing computer power enables the use of accurate forward modeling programs in advanced inversion algorithms where no approximations are used and the full information content of the measured data can be exploited. Here, recent developments of large-scale quantitative EMI inversion and full-waveform GPR inversion are discussed that yield higher resolution of quantitative medium properties compared to conventional approaches. In both cases a detailed forward model is used in the inversion procedure that is based on Maxwell＇s equations. The multi-channel EMI data that have different sensing depths for the different source-receiver offset are calibrated using a short electrical resistivity tomography（ERT） calibration line which makes it possible to invert for electrical conductivity changes with depth over large areas. The crosshole GPR full-waveform inversion yields significant higher resolution of the permittivity and conductivity images compared to ray-based inversion results.

关键词： ground penetrating radar electromagnetic induction full-waveform inversion.

FLIGHT MANAGEMENT PROCEDURES FOR PHYSIOLOGICAL NOISE-MINIMAL LANDING TRAJECTORIES

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Chinese Journal of Aeronautics 1993年第4期 286-296页

作者： Jacob H G Postfach 1109 Honeywell Regelsysteme GmbH

The future world-wide installation of the newly developed Microwave Landing System(MLS) will permit a four-dimensional (including time) guidance of aircraft in the airportarea with the combined advantages of safer, more economical flight paths with lessdetrimental environmental impact such as noise nuisance. The purpose of this paper is todemonstrate that the introduction of these advanced navigation and flight guidance technologieswill make it possible to compute and to apply continuously time-dependent commandinputs for an aircraft in a way which will minimize the noise annoyance for the populationliving in the neighborhood of the airport. The average physiological Effective PerceivedNoise Level in Sone as cost criterion is minimized (in the investigation for theoptimization calculations) with consideration of not only the location and population densityof living areas along the approach trajectory but also the effects of temperature andwind gradients on noise propagation. The results obtained for the AirportDusseldorf-Lohausen show that, even numerous design, comfort, and safety constraintsare taken into account, the noise exposure for the average airport area inhabitant could bereduced by over 20% relatively to conventional Standard Jeppesen Manual landing approachif the proposed optimal flight landing trajectory management procedure would beapplied.

关键词： FLIGHT MANAGEMENT PROCEDURES FOR PHYSIOLOGICAL NOISE-MINIMAL LANDING TRAJECTORIES Wind

Predictions of the P1 approximation for radiative heat transfer in heterogeneous granular media

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Particuology 2023年第11期82卷 25-47页

作者： Jelena Macak Christoph Goniva Stefan Radl DCS Computing gmbh 4020LinzAustria Graz University of Technology Institute of Process and Particle Engineering8010GrazAustria

The P1 approximation is a computationally efficient model for thermal ***,we present a P1 formulation in the context of the combined computational fluid dynamics and discrete element method(CFD-DEM),including closures for dependent scattering and *** available analytical and semi-analytical solutions,we find agreement for steady-state and transient quantities in sizedisperse *** flux is identified as the most sensitive quantity to predict,displaying unphysical spatial *** oscillations are due to a temperature slip at the locations of abrupt change in solid *** propose two techniques that mitigate this effect:smoothing of the radiative properties,and ***,using up to a million times enlarged particles,we demonstrate practically limitless compatibility with ***,we compare predictions made with our code to experimental data for a pebble bed under vacuum conditions,and in presence of *** find that a carefully calibrated simulation can replicate trends observed in experiments,with relative temperature error of less than 10%.

关键词： CFD-DEM Thermal radiation Coarse-graining P1 Pebble bed nuclear reactor