检索结果-南通市图书馆

Analysis of positioning of wayside charging stations for hybrid locomotive consists in heavy haul train operations

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

Railway Engineering Science 2021年第3期29卷 285-298页

作者： Shah Ahmad Maksym Spiryagin Colin cole Qing Wu Peter Wolfs Chris Bosomworth Centre for Railway Engineering Central Queensland UniversityRockhamptonQLDAustralia

Hybrid locomotive concepts have been considered as a step towards converting the railway industry into a green transport *** of the challenges in integrating a hybrid locomotive in the train consist is that the battery pack in the locomotive needs to be recharged during a long-haul trip which requires stopping of the train.A typical battery pack requires about 1 h to recharge which is *** the improvement in the charging system,it is now possible that the same capacity battery pack could be recharged in 10–12 min which can be a competitive option for the railway *** paper proposes a method based on simulation to evaluate the positioning of charging stations on a train network.A typical example of a heavy haul train operation hauled by diesel-electric and hybrid locomotives is used to demonstrate the method by using simulation *** result of the simulation study show that the method developed in this paper can be used to evaluate the state of charge(SoC)status of a hybrid locomotive along the *** is also shown that the SoC status obtained by the simulation method can be further used to assess the positions of charging stations along the track at the design stage.

关键词： Hybrid locomotive Wayside charging station Co-simulation Multibody Simulation

Combined influence of Ce(Ⅲ)and iodide ions for corrosion protection of AA 2024-T3 in acidic to neutral chloride-rich environments:Electrochemical and surface characterization studies

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2023年第2期41卷 309-320页

作者： Mohammed A.El-Hashemy Anthony E.Hughes Thomas Gengenbach A.Matthew Glenn Ivan S.cole Chemistry Department College of ScienceJouf UniversityP.O.Box 2014SakakaAljoufSaudi Arabia Air Pollution Research Department Environmental and Climate Change Research InstituteNational Research CentreDokkiGiza12622Egypt CSIRO Mineral Resources ClaytonVic3168Australia CSIRO Manufacturing ClaytonVic3168Australia School of Engineering RMIT UniversityCarltonVic3053Australia

It has been reported that trivalent cerium salts are effective inhibitors for corrosion of AA2024-T3 in neutral to alkaline co rrosive enviro nments,but poor in acidic *** this study,work was done for extending corrosion resistance provided by Ce(NO_(3))_(3)to acidic pHs as low as 2.5 through the addition of iodide *** this end,potentiodynamic polarization was used to ascertain the optimum Ce(Ⅲ)concentration for the inhibition of AA2024-T3 corrosion in 3.5%NaCl *** optimum concentration is found to be in a range between 0.1 and 0.3 mmol/L Ce(Ⅲ).This optimum concentration also gives a maximum width of the passive region under the pitting potential(Epit).Based on this optimization,further work was performed as a function of pH without and in the presence of 0.01 mol/L KI at five pH values(2.5,4,5,7,and 8).Without iodide the best inhibition provided by the Ce(Ⅲ)cation is at pH=7 but active corrosion is observed at pH=2.5 with an estimated inhibitor efficiency(-37.6%).The addition of iodide ions(I^(-))reverses the poor corrosion resistance whereby the inhibitor efficiency becomes 47.7%.Moreover,at pH=4 the efficiency is also increased from 54.0%to 81.0%with iodide addition providing a significant improvement over Ce(Ⅲ)cations alone under acidic *** is a synergistic effect between I-anion and Ce(Ⅲ)cation,which is determined to be 2.4 and 2.1 at pH=2.5and 4.0,*** pH=5 and 7 there is virtually no change in inhibition but at pH=8 the inhibition falls away due to a considerable amount of cerium precipitating out of solution as cerium *** protective film formed on sites in the aluminium alloy surface at different pH values was examined by both scanning electron microscopy with energy dispersive X-ray analysis and X-ray photoelectron spectroscopy to determine the role of these ions as a function of pH in surface *** is proposed that at pH=2.5 protection is provided by a bilayer adsorption of iodide with"cap

关键词： Aluminium alloy Cerium(Ⅲ)salt Potassium iodide Corrosion inhibitor XPS Rare earths

易化输运过程的简单化学模型及其在Wyman-Murray扩散中的应用(英文)

在线全文

学校读者我要写书评

暂无评论

物理化学学报 2010年第11期26卷 2857-2864页

作者： cole Christine Lind QIAN Hong Department of Applied Mathematics University of Washington Seattle WA 98195 USA

A simple chemical kinetic model is developed which describes the behavior of small ligands that can bind reversibly with large carrier molecules with slower intrinsic rates of transport. Under certain conditions, which we describe, the presence of the slower carriers in fact enhances the transport of the ligand. This is the chemical version of Wyman-Murray′ s facilitated diffusion. The simple model illuminates the driven nature of the enhancement of the transport by the carrier molecules: we show that the facilitated transport depends crucially on a"grand canonical" setting in which the free ligand concentrations are kept constant in the presence of the facilitating protein, in contrast to a canonical setting with constant total ligand concentrations. Results from the simple model are compared to previous experimental and theoretical results for Wyman-Murray facilitated diffusion of oxygen and carbon monoxide in muscle. A relation is established between the association-dissociation rates and the down-stream ligand concentration, or back pressure for oxygen, required for the facilitation effect to occur.

关键词：化学反应动力学促进效应分子浓度

Rail temperature variation under heavy haul operations

在线全文

学校读者我要写书评

暂无评论

Railway Engineering Science 2022年第2期30卷 148-161页

作者： Chris Bosomworth Maksym Spiryagin Sanath Alahakoon Colin cole Ben Sneath Bruce Makin Centre for Railway Engineering Central Queensland UniversityRockhampton 4702Australia Australasian Centre for Rail Innovation Canberra 2601Australia ARC Infrastructure Perth 6105Australia

There currently does not exist in industry a reliable method for the detection of rail foot *** their head-based counterparts,foot flaws result in broken rail with potentially catastrophic consequences.A proposed area of research for the detection of these flaws is thermography,a non-contact method of measuring and analysing infrared emissions from an object under *** industry,active excitation thermography is the most common,requiring an excitation *** paper will present a temperature measurement system and a method of transient temperature extraction from the running rails for the effects of a passing train to evaluate heat transfer in the practical rail *** outcomes of these results will provide future direction in the development of a rail heat transfer model and determine if train passage provides enough active excitation for a thermography-based detection technique.

关键词： Rail heat transfer Rail foot flaws Field temperature measurement Transient temperature extraction

Design　Issues　for　Use　of　Solid　State　Transmitter　Radars　in　the　Terminal　Airspace

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 1995年第1期6卷 57-64页

作者： E. Lee cole & Lawrence J. Friz(Westinghouse Electric Corporation, Baltimore, MD, USA) Westinghouse Electric Corporation Baltimore MD USA

Abstract

关键词： Design Use Issues Airspace

Solvent Extraction Developments in Southern Africa

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2006年第2期11卷 153-159页

作者： Peter M. cole Kathryn C. Sole Angus M. Feather Matomo Projects (Pty) Ltd. Johannesburg South Africa Anglo American Research Laboratories Johannesburg South Africa Cognis Corporation Johannesburg South Africa

The largest solvent-extraction plant in the world at the time, the Nchanga Copper Operation, was in Zambia. The first commercial process using solvent extraction for the refining of the platinum-group metals was in South Africa. More recently, the Southern African region has seen the implementation of solvent extraction for other base metals, precious metals, and specialty metals. These include the world firsts of primary production of zinc at Skorpion Zinc in Namibia and the large-scale refining of gold by Harmony Gold in South Africa. Several other flowsheets that use solvent-extraction technology are currently under commissioning, development, or feasibility study for implementation in this part of the world, including those for the recovery of copper, cobalt, nickel, tantalum, and niobium.

关键词： solvent extraction zinc recovery gold refining copper cobalt nickel

A review of hydrogen technologies and engineering solutions for railway vehicle design and operations

在线全文

学校读者我要写书评

暂无评论

Railway Engineering Science 2021年第3期29卷 212-232页

作者： Yan Sun M.Anwar N.M.S.Hassan Maksym Spiryagin Colin cole Centre for Railway Engineering Central Queensland UniversityRockhamptonQLDAustralia

Interest in hydrogen-powered rail vehicles has gradually increased worldwide over recent decades due to the global pressure on reduction in greenhouse gas emissions,technology availability,and multiple options of power *** the past,research and development have been primarily focusing on light rail and regional trains,but the interest in hydrogen-powered freight and heavy haul trains is also *** review shows that some technical feasibility has been demonstrated from the research and experiments on proof-of-concept *** rail vehicles powered by hydrogen either are currently operating or are the subject of experimental *** paper identifies that fuel cell technology is well developed and has obvious application in providing electrical traction power,while hydrogen combustion in traditional IC engines and gas turbines is not yet well *** need for on-board energy storage is discussed along with the benefits of energy management and control systems.

关键词： Hydrogen Fuel cells Hybrid power Rail vehicles Greenhouse gas emissions

Intramedullary bone pedestal formation contributing to femoral shaft fracture nonunion:A case report and review of the literature

在线全文

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2022年第5期13卷 528-537页

作者： Charles B Pasque Alexander J Pappas Chad A cole Jr Department of Orthopaedic Surgery and Rehabilitation University of Oklahoma College of MedicineOklahoma CityOK 73104United States University of Colorado School of Medicine AuroraCO 80045United States

BACKGROUND Femoral shaft fracture is a commonly encountered orthopedic injury that can be treated operatively with a low overall delayed/nonunion *** the case of delayed union after antegrade or retrograde intramedullary nail fixation,fracture dynamization is often attempted *** after dynamization has been shown to occur due to infection and other aseptic *** present a unique case of diaphyseal femoral shaft fracture nonunion after dynamization due to intramedullary cortical bone pedestal formation at the distal tip of the *** SUMMARY A 37-year-old male experienced a high-energy trauma to his left thigh after coming down hard during a motocross *** was consistent with an isolated,closed,left mid-shaft femur *** was initially managed with reamed antegrade intramedullary nail fixation but had continued thigh *** at four months demonstrated no evidence of fracture union and failure of the distal locking screw,and dynamization by distal locking screw removal was *** patient continued to have pain eight months after the initial procedure and 4 mo after dynamization with serial radiographs continuing to demonstrate no evidence of fracture *** decision was made to proceed with exchange nailing for aseptic fracture *** the exchange procedure,an obstruction was encountered at the distal tip of the failed nail and was confirmed on magnified fluoroscopy to be a pedestal of cortical bone in the *** obstruction required further distal reaming.A longer and larger diameter exchange nail was placed without difficulty and without a distal locking screw to allow for dynamization at the fracture ***-operative radiographs showed proper fracture and hardware *** was subsequently radiographic evidence of callus formation at one year with subsequent fracture consolidation and resolution of thigh pain at eighteen *** The risk of fracture nonunion caused by int

关键词： Nonunion Femoral shaft fracture Diaphysis Fracture fixation Antegrade intramedullary nail Case report

Technology for the next gravitational wave detectors

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

Science China(Physics,Mechanics & Astronomy) 2015年第12期58卷 65-90页

作者： MITROFANOV Valery P. CHAO Shiuh PAN Huang-Wei KUO Ling-Chi cole Garrett DEGALLAIX Jerome WILLKE Benno Faculty of Physics Moscow State University Institute of Photonics Technologies "National" Tsing Hua University Crystalline Mirror Solutions LLC Crystalline Mirror Solutions Gmb H Seestadtstr Vienna Center for Quantum Science and Technology(VCQ) Faculty of Physics University of Vienna Laboratoire des Mat'eriaux Avanc'es 7 Avenue Pierre de Coubertin Max Planck Institute for Gravitational Physics(Albert Einstein Institute) and Leibniz Universitt Hannover

This paper reviews some of the key enabling technologies for advanced and future laser interferometer gravitational wave detectors, which must combine test masses with the lowest possible optical and acoustic losses, with high stability lasers and various techniques for suppressing noise. Sect. 1 of this paper presents a review of the acoustic properties of test masses. Sect. 2 reviews the technology of the amorphous dielectric coatings which are currently universally used for the mirrors in advanced laser interferometers, but for which lower acoustic loss would be very advantageous. In sect. 3 a new generation of crystalline optical coatings that offer a substantial reduction in thermal noise is reviewed. The optical properties of test masses are reviewed in sect. 4, with special focus on the properties of silicon, an important candidate material for future detectors. Sect. 5 of this paper presents the very low noise, high stability laser technology that underpins all advanced and next generation laser interferometers.

关键词： gravitational waves advanced techniques thermal noise coating laser