检索结果-南通市图书馆

Hydrological modelling in the anthroposphere: predicting local runoff in a heavily modified high-alpine catchment

Journal of Mountain Science 2018年第5期15卷 921-938页

作者： johannes WESEMANN Mathew HERRNEGGER Karsten SCHULZ Institute of Water Management Hydrology and Hydraulic Engineering (IWHW) University of Natural Resources and Life Sciences Vienna (BOKU)

Hydrological models within inflow forecasting systems for high-alpine hydropower reservoirs can provide valuable information as part of a decision support system for the improvement of hydropower production or flood retention. The information, especially concerning runoff, is however rarely available for the calibration of the hydrological models used. Therefore, a method is presented to derive local runoff from secondary information for the calibration of the model parameters of the rainfallrunoff model COSERO. Changes in water levels in reservoirs, reservoir outflows, discharge measurements at water intakes and in transport lines are thereby used to derive the local, "natural" flow for a given sub-catchment. The proposed method is applied within a research study for the ?BB Infrastructure Railsystem division in the Stubache catchment in the central Austrian Alps. Here, the ?BB operates the hydropower scheme "Kraftwerksgruppe Stubachtal", which consists of 7 reservoirs and 4 hydropower stations. The hydrological model has been set up considering this human influences and the high natural heterogeneity in topography and land cover, including glaciers. Overall, the hydrological model performs mostly well for the catchment with highest NSE values of 0.78 for the calibration and0.79 for the validation period, also considering the use of homogeneous parameter fields and the uncertainty of the derived local discharge values. The derived runoff data proved to be useful information for the model calibration. Further analysis, examining the water balance and its components as well as snow cover, showed satisfactory simulation results. In conclusion, a unique runoff dataset for a small scale high-alpine catchment has been created to establish a hydrological flow prediction model which in a further step can be used for improved and sustainable hydropower management.

关键词： High alpine catchments Rainfall-runoff modelling Hydropower Ungauged basins

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Using LIDAR and ground truth for landslide recognition and characterization of geotechnical and morphological parameters in sedimentary rocks,a case study in Northern Bavaria (Germany)

引用

Journal of Mountain Science 2017年第8期14卷 1513-1525页

作者： WIEDENMANN johannes ROHN Joachim MOSER Michael GeoZentrum Nordbayern Department of Applied GeologyUniversity of Erlangen-Nürnberg

The use of LIDAR-derived shaded relief maps led to the identification of all potential landslide areas in a hilly region in Northern Bavaria(1590 km^2), Germany. Every possible structure was investigated by field investigation which resulted in a detailed database of 1002 landslides within the study area. The analysis of geological, lithological, topographical and morphological properties(spatial ratio, lithological and geological setting, length/width distribution, material properties and slope angle) revealed characteristic appearances of the landslides and possible relationships between different aspects. Strong relations between the lithological setting, spatial ratio of the mapped landslides and distribution of slope angle could be observed. This study shows the value of high-resolution shaded relief maps for detecting and mapping landslides in a large area with comparatively little work and time in comparison to the traditional approach to mapping. It reveals that many landslides were not known before. Landslides are much more common in Northern Bavaria and have a higher influence on the denudation rate of the Franconian Alb than expected before.

关键词： Landslides LIDAR Appearance Spatialratio Material properties Bavaria

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Accelerating GW calculations through machine-learned dielectric matrices

引用

npj Computational Materials 2023年第1期9卷 437-445页

作者： Mario G.Zauchner Andrew Horsfield johannes Lischner Department of Materials Thomas Young CentreImperial College LondonSouth Kensington CampusLondon SW72AZUK

The GW approach produces highly accurate quasiparticle energies,but its application to large systems is computationally challenging due to the difficulty in computing the inverse dielectric *** address this challenge,we develop a machine learning approach to efficiently predict density–density response functions(DDRF)in *** atomic decomposition of the DDRF is introduced,as well as the neighborhood density–matrix descriptor,both of which transform in the same way under *** resulting DDRFs are then used to evaluate quasiparticle energies via the GW *** assess the accuracy of this method,we apply it to hydrogenated silicon clusters and find that it reliably reproduces HOMO–LUMO gaps and quasiparticle energy *** accuracy of the predictions deteriorates when the approach is applied to larger clusters than those in the training *** advances pave the way for GW calculations of complex systems,such as disordered materials,liquids,interfaces,and nanoparticles.

关键词： materials dielectric quasi

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Effect of Nb Loading on Catalytic Properties of Ni/Ce_(0.75)Zr_(0.25)O_2 Catalyst for Methane Partial Oxidation

引用

Journal of Natural Gas Chemistry 2007年第3期16卷 227-234页

作者： Sitthiphong Pengpanich Vissanu Meeyoo Thirasak Rirksomboon johannes Schwank Department of Chemical Engineering Mahanakorn University of TechnologyBangkok 10530Thailand Center for Advanced Materials and Environmental Research Mahanakorn University of TechnologyBangkok 10530Thailand The Petroleum and Petrochemical College Chulalongkorn UniversityBangkok 10330Thailand Department of Chemical Engineering University of MichiganAnn ArborMI 481092136USA

In this study, the effect of Nb loading on the catalytic activity of Ce0.75Zr0.25O2-supported Ni catalysts was studied for methane partial oxidation. The catalysts were characterized by BET, H2 chemisorption, XRD, TPR, TEM and tested for methane partial oxidation to syngas in the temperature range of 400-800 ℃at atmospheric pressure. The results showed that the activity of methane partial oxidation on the catalysts was apparently dependent on Nb loading. It seemed that the addition of Nb lowered the catalytic activity for methane partial oxidation and increased the extent of carbon deposition. This might be due to the strong interaction between NiO and Nb-modified support and reduction of surface oxygen reducibility.

关键词： methane partial oxidation Ni/CeO2-ZrO2 niobium

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Endo-microscopy beyond the Abbe and Nyquist limits

引用

Light(Science & Applications) 2020年第1期9卷 1246-1257页

作者： Lyubov V.Amitonova johannes F.de Boer LaserLaB Department of Physics and AstronomyVrije Universiteit AmsterdamDe Boelelaan 10811081 HV AmsterdamThe Netherlands Advanced Research Center for Nanolithography(ARCNL) Science Park 1061098 XG AmsterdamThe Netherlands

For several centuries,far-field optical microscopy has remained a key instrument in many scientific disciplines,including physical,chemical,and biomedical ***,far-field imaging has many limitations:the spatial resolution is controlled by the diffraction of light,and the imaging speed follows the Nyquist–Shannon sampling *** recent development of super-resolution techniques has pushed the limits of spatial ***,these methods typically require complicated setups and long acquisition times and are still not applicable to deeptissue ***,we report imaging through an ultra-thin fibre probe with a spatial resolution beyond the Abbe limit and a temporal resolution beyond the Nyquist limit simultaneously in a simple and compact *** use the random nature of mode coupling in a multimode fibre,the sparsity constraint and compressive sensing *** new approach of super-resolution endo-microscopy does not use any specific properties of the fluorescent label,such as depletion or stochastic activation of the molecular fluorescent state,and therefore can be used for label-free *** demonstrate a spatial resolution more than 2 times better than the diffraction limit and an imaging speed 20 times faster than the Nyquist *** proposed approach can significantly expand the realm of the application of nanoscopy for bioimaging.

关键词： beyond limit fibre

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Actuation of Liquid Flow by Guided Acoustic Waves on Punched Steel Tapes with Protruding Loops

引用

Journal of Bionic Engineering 2021年第3期18卷 534-547页

作者： Alexander Backer johannes Landskron Klaus Stefan Drese Gerhard Lindner Institute of Sensor and Actuator Technology Coburg University of Applied Sciences and Arts96450 CoburgGermany

In a biomimetic approach the feasibility of liquid flow actuation by vibrating protruding structures excited via guided acoustic waves is *** by periodically beating cilia the loop part of a punched metallic hook-and-loop tape with tilted protruding loops was used as a waveguide for plate waves in *** waves were excited in the frequency range of 110 Hz to 220 Hz by directly coupling the tape to a loudspeaker membrane.A flow generated in the tilt direction of the loops with velocities up to 60 mm s 1 was visualized by ink droplets deposited on the *** phenomenon persisted,when the protruding length of the loops was reduced by decreasing the protrusion ***,after closing the punch holes near the loops with sticking tape streaming could not be observed any *** same happened with open punch holes when the ink was replaced by ***-frequency acoustic streaming around vibrating sharp edges is proposed as an explanation for the observed *** are expected with respect to the modification of flow profiles and the enhancement of transport processes along and across liquid-solid boundaries.

关键词： bio-inspired guided acoustic waves metallic hook-and-loop tape artificial cilia liquid propulsion Copyright

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development of Texture Mapping Approaches for Additively Manufacturable Surfaces

引用

Chinese Journal of Mechanical Engineering 2022年第4期35卷 125-138页

作者： Bhupesh Verma Omid Zarei Song Zhang johannes Henrich Schleifenbaum Chair for Digital Additive Production RWTH Aachen University52074 AachenGermany

manufacturing(AM)technologies have been recognized for their capability to build complex components and hence have ofered more freedom to designers for a long *** ability to directly use a computer-aided design(CAD)model has allowed for fabricating and realizing complicated components,monolithic design,reducing the number of components in an assembly,decreasing time to market,and adding performance or comfort-enhancing *** of the features that can be introduced for boosting a component functionality using AM is the inclusion of surface texture on a given *** inclusion is usually a difcult task as creating a CAD model resolving fne details of a given texture is difcult even using commercial software *** paper develops a methodology to include texture directly on the CAD model of a target surface using a patch-based sampling texture synthesis algorithm,which can be manufactured using *** for the texture generation algorithm can be either a physical sample or an image with heightmap *** heightmap information from a physical sample can be obtained by 3D scanning the sample and using the information from the acquired point *** obtaining the required inputs,the patches are sampled for texture generation according to non-parametric estimation of the local conditional Markov random feld(MRF)density function,which helps avoid mismatched features across the patch *** generating the texture,a design constraint to ensure AM producibility is considered,which is essential when manufacturing a component using,e.g.,Fused Deposition Melting(FDM)or Laser Powder Bed Fusion(LPBF).The generated texture is then mapped onto the surface using the developed distance and angle preserving mapping *** implemented algorithms can be used to map the generated texture onto a mathematically defned *** paper maps the textures onto fat,curved,and sinusoidal surfaces for *** the texture m

关键词： Texture synthesis Design for additive manufacturing Image processing Textured surface generation Texture mapping

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computational design of bimetallic core-shell nanoparticles for hot-carrier photocatalysis

引用

npj Computational Materials 2018年第1期4卷 389-395页

作者： Luigi Ranno Stefano Dal Forno johannes Lischner Department of Materials Imperial College LondonLondon SW72AZUK Department of Physics Imperial College LondonLondon SW72AZUK Department of Physics and Department of Materials and the Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondon SW72AZUK

Computational design can accelerate the discovery of new materials with tailored properties,but applying this approach to plasmonic nanoparticles with diameters larger than a few nanometers is challenging as atomistic first-principles calculations are not feasible for such *** this paper,we employ a recently developed material-specific approach that combines effective mass theory for electrons with a quasistatic description of the localized surface plasmon to identify promising bimetallic core-shell nanoparticles for hot-electron ***,we calculate hot-carrier generation rates of 100 different core-shell nanoparticles and find that systems with an alkali-metal core and a transition-metal shell exhibit high figures of merit for water splitting and are stable in aqueous *** analysis reveals that the high efficiency of these systems is related to their electronic structure,which features a two-dimensional electron gas in the *** calculations further demonstrate that hotcarrier properties are highly tunable and depend sensitively on core and shell *** design rules resulting from our work can guide experimental progress towards improved solar energy conversion devices.

关键词： applying alkali diameters

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Beneficial effects of hirudotherapy in a chronic case of complex regional pain syndrome

引用

Journal of Integrative Medicine 2019年第5期17卷 383-386页

作者： Rebecca Kulbida Alexander Mathes johannes Loeser Department of Anaesthesiology and Intensive Care Medicine University Clinic of Cologne

We report about hirudotherapy in a patient with chronic complex regional pain syndrome(CRPS) in the right hand. CRPS is a multifactorial disease associated with disabling pain as well as sensory and motor deficits. The optimal therapeutic management is based on personalized multimodal treatment approaches;however, hirudotherapy has not been described in the available literature. To date, we have completed five medicinal leech treatments. Altogether, hirudotherapy led to rapid and substantial relief of symptoms, especially with respect to pain intensity ratings and skin temperature asymmetries. In addition, the patient’s active and passive agility of the affected limb improved obviously.

关键词： Hirudotherapy Complex regional pain syndrome Chronic pain Medicinal leeches

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of Transmission Losses of Various Battery Electric Vehicles

引用

Automotive Innovation 2022年第4期5卷 388-399页

作者： johannes Hengst Matthias Werra Ferit KüÇükay Institute of Automotive Engineering TU BraunschweigBraunschweigGermany

Transmission losses in battery electric vehicles have compared to internal combustion engine powertrains a larger share in the total energy consumption and play therefore a major ***,the power flows not only during propulsion through the transmissions,but also during recuperation,whereby efficiency improvements have a double *** investigation of transmission losses of electric vehicles thus plays a major *** this paper,three simulation models of the Institute of Automotive Engineering(the lossmap-based simulation model,the modular simulation model,and the 3D simulation model)are *** lossmap-based simulation model calculates transmission losses for electric and hybrid transmissions,where three spur gear transmission concepts for battery electric vehicles are *** transmission concepts include a single-speed transmission as a reference and two two-speed ***,the transmission lossmaps are integrated into the modular simulation model(backward simulation)and in the 3D simulation model(forward simulation),which improves the simulation *** modular simulation model calculates the optimal operation of the transmission concepts and the 3D simulation model represents the more realistic behavior of the transmission *** different transmission concepts are investigated in Worldwide Harmonized Light Vehicle Test Cycle and evaluated in terms of transmission losses as well as the total energy *** map-based simulation model allows the transmission losses to be broken down into the individual component losses,thus allowing transmission concepts to be examined and evaluated in terms of their efficiency in the early development stage to develop optimum powertrains for electric axle *** considering transmission losses in detail with a high degree of accuracy,less efficient concepts can be eliminated at an early development *** a result,only relevant concepts are built as prototypes,which reduce

关键词： Battery electric vehicle(BEV) Transmission losses Efficiency analysis WLTC Backward simulation Forward simulation Energy consumption

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：