检索结果-南通市图书馆

A flexible architecture for job management in a grid environment

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第1期8卷 95-105页

作者： LUAN Cui-ju song guang-hua ZHENG Yao ZHANG Ji-fa College of Information Engineering Shanghai Maritime University Shanghai 200135 China School of Computer Science and Center for Engineering and Scientific Computation Zhejiang University Hangzhou 310027 China

Job management is a key issue in computational grids, and normally involves job definition, scheduling, executing and monitoring. However, job management in the existing grid middleware needs to be improved in terms of efficiency and flexibility. This paper addresses a flexible architecture for job management with detailed design and implementation. Frameworks for job scheduling and monitoring, as two important aspects, are also presented. The proposed job management has the advantages of reusability of job definition, flexible and automatic file operation, visual steering of file transfer and job execution, and adaptive application job scheduler. A job management wizard is designed to implement each step. Therefore, what the grid user needs to do is only to define the job by constructing necessary information at runtime. In addition, the job space is adopted to ensure the security of the job management. Experimental results showed that this approach is user-friendly and system efficient.

关键词： Grid Job management Job definition reuse Steering of job transfer Job space

Twinning and detwinning during compression–tension loading measured by quasi in situ electron backscatter diffraction tracing in Mg–3Al–Zn rolled sheet

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2015年第10期34卷 698-705页

作者： Li Zheng Shi-Hong Zhang Dirk Helm Hong-Wu song guang-Sheng song Neng-Yong Ye Institute of Metal Research Chinese Academy of Sciences Material Shaping Researching Group Fraunhofer Institute for Mechanics of Materials School of Material Science and Engineering Shenyang Aerospace University

Twinning and detwinning are the important deformation modes in magnesium alloys during cyclic loading at room temperature. To analyze these two deformation mechanism, cyclic compression–tension experiments were performed on Mg–3Al–1Zn rolled sheet along the rolling direction. In these tests, the microstructure evolutions of a series of grains during deformation were traced by using quasi in situ electron backscatter diffraction(EBSD). Important quantities like the Schmid factors of twinning system, the fraction of twinning during compression, and the fraction of twinning after reverse loading were calculated on the basis of measured quantities. The influence of Schmid factor of twinning variants on detwinning upon reverse loading was analyzed. Detwinning would prefer to proceed during reverse loading if the Schmid factor of twinning in the twinning area before reverse loading is sufficiently large.

关键词： Magnesium alloy Sheet metal Twinning Detwinning Te

The anodically polarized Mg surface products and accelerated hydrogen evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第1期11卷 230-248页

作者： Jufeng Huang guang-Ling song Yixing Zhu Dajiang Zheng Ziming Wang Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityPeople’s Republic of China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005People’s Republic of China School of Engineering The University of QueenslandSt.LuciaQld 4072Australia

To clarify the anodic dissolution mechanism of Mg,the hydrogen evolution from pure Mg in acidic solutions under galvanostatic conditions were systematically *** increasing anodic current density,the cathodic hydrogen evolution rate decreased,and the anodic hydrogen evolution became faster while some surface area on the Mg was becoming dark under anodic *** on the surface analysis results and the generally accepted basic electrochemical equations,the evolution kinetics of hydrogen from Mg was deduced,and the most possible surface intermediate active species that could facilitate the anodic Mg dissolution and anodic hydrogen evolution were *** paper further develops the model of incomplete film Mg^(+) dissolution,explains many reported experimental phenomena,and clarifies misunderstandings of current mechanism.

关键词： Magnesium Corrosion Hydrogen evolution Negative difference effect

A Layer-Structured Metal-Organic Framework-Derived Mesoporous Carbon for Efficient Oxygen Reduction Reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2016年第6期29卷 693-698,I0001页

作者： Hong-guang song Yan-iun Ding Jia Yang Hang-xun Xu CA5KeyLaboratoryofSoftMatterChemistry DepartmentofPolymerScienceandEngineeringUniversityofScienceandTechnologyofChinaHefei230026China

Developing highly active and durable electrocatalysts for the oxygen reduction reaction （ORR） is crucial to large-scale commercialization of fuel cells and metal-air batteries. Here we report a facile approach for the synthesis of nitrogen and oxygen dual-doped meso-porous layer-structured carbon electrocatalyst embedded with graphitic carbon coated cobalt nanoparticles by direct pyrolysis of a layer-structured metal-organic framework. The elec- trocatalyst prepared at 800℃ exhibits comparable ORR performance to Pt/C catalysts but possesses superior stability to Pt/C catalysts. This synthetic approach provides new prospects in developing sustainable carbon-based electrocatalysts for electrochemical energy conversion devices.

关键词： Electrocatalysis Oxygen reduction reaction Mesoporous carbon Cobaltnanoparticles

Visualization and simulation of steel metallurgy processes

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

International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1387-1396页

作者： Te Xu guang song Yang Yang Pei-xin Ge Li-xin Tang Key Laboratory of Data Analytics and Optimization for Smart Industry(Northeastern University) Ministry of EducationShenyang 110819China Liaoning Engineering Laboratory of Operations Analytics and Optimization for Smart Industry Northeastern UniversityShenyang 110819China Liaoning Key Laboratory of Manufacturing System and Logistics Shenyang 110819China Institute of Industrial&Systems Engineering Northeastern UniversityShenyang 110819China

Steel production involves the transfer and transformation of material and energy at different levels, structures, and scales, and this process incurs substantial information in the material and energy dimensions. Given the black-box feature of iron and steel production processes, process visualization plays an important role and inevitably benefits parameter correction, technical support decision-making, personnel training, and other aspects of the steel metallurgy industry. The technological characteristics of the entire process in the steel industry were analyzed in this study, a visualization technology route based on virtual reality(VR) was built, and the important components of visual simulation system for steel industry and the important technical points needed to realize the system were proposed. On the foundation, a visual simulation model for the process scheduling of the iron and steel enterprise raw materials' field, slab, and hot rolling processes was built, and a visualization simulation platform of the iron and steel metallurgy plant-wide process, including ironmaking, steelmaking, hot rolling, and cold rolling, was developed. Lastly, the effectiveness of platform was illustrated by practical application.

关键词： virtual reality steel metallurgy plant-wide visualization

An efficient projection defocus algorithm based on multi-scale convolution kernel templates

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第12期14卷 930-940页

作者： Bo ZHU Li-jun XIE guang-hua song Yao ZHENG School of Aeronautics and Astronautics Zhejiang University Center for Engineering and Scientific Computation Zhejiang University

The focal problems of projection include out-of-focus projection images from the projector caused by incomplete mechanical focus and screen-door effects produced by projection pixilation. To eliminate these defects and enhance the imaging quality and clarity of projectors, a novel adaptive projection defocus algorithm is proposed based on multi-scale convolution kernel templates. This algorithm applies the improved Sobel-Tenengrad focus evaluation function to calculate the sharpness degree of intensity equalization and then constructs multi-scale defocus convolution kernels to remap and render the defocus projection image. The resulting projection defocus corrected images can eliminate out-of-focus effects and improve the sharpness of uncorrected images. Experiments show that the algorithm works quickly and robustly and that it not only effectively eliminates visual artifacts and can run on a self-designed smart projection system in real time but also significantly improves the resolution and clarity of the observer's visual perception.

关键词： Projection focal Sobel-Tenengrad evaluation function Projector defocus Multi-scale convolution kernels

Microstructure modification and corrosion resistance enhancement of die-cast Mg-Al-Re alloy by Sr alloying

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2021年第3期9卷 950-963页

作者： Matthew S.Dargusch Zhiming Shi Hanliang Zhu Andrej Atrens guang-Ling song The University of Queensland Centre for Advanced Materials Processing and Manufacturing(AMPAM)School of Mechanical and Mining EngineeringBrisbaneQLD 4072Australia Australian Nuclear Science&Technology Organisation Locked Bag 2001Kirrawee DCSydneyNSW 2232Australia The University of Queensland Materials EngineeringSchool of Mechanical and Mining EngineeringBrisbaneQld 4072Australia State Key Lab for Physical Chemistry of Solid State Surfaces Center for Marine Materials Corrosion and ProtectionCollege of MaterialsXiamen UniversityXiamenFujian 361005China

The effects of Sr additions on the microstructure and corrosion performance of a Mg-Al-RE alloy in 3.5 wt.%Na Cl saturated with Mg(OH)_(2) have been *** examination reveals that the Sr addition introduces additional intermetallic phases,refines intermetallic networks and dendritic grains,and improves the network *** Al and rare earth elements can be identified in the intermetallics and grain boundaries or inter-dendrite regions under a transmission electron microscope and secondary electron microscope,*** the Sr-containing intermetallic phases and the refined microstructure,the oxide films become more protective,resulting in more corrosion resistant boundary areas and thus dendrite grain ***,the presence of large amounts of intermetallics and boundaries can enhance the corrosion performance of the Mg-Al-RE alloy containing Sr.

关键词： A.magnesium B.TEM B.SEM C.segregation C.Alkaline corrosion

Biocorrosion induced by red-tide alga-bacterium symbiosis and the biofouling induced by dissolved iron for carbon steel in marine environment

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第33期128卷 107-117页

作者： Yuqiao Dong guang-Ling song Jiawei Zhang Yahui Gao Zi Ming Wang Dajiang Zheng Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China School of Life Sciences and Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems Xiamen UniversityXiamen 361102China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China The University of Queensland School of Mechanical and Mining EngineeringDivision of Materials EngineeringSt LuciaQld 4072Australia

The assemblages of unicellular microalgae and bacteria in phytoplankton communities can generally result in biodeterioration of metals in marine *** this study,the self-promoted biofouling mechanism underneath red-tide alga Phaeodactylum tricornutum and its symbiotic bacterium Bacillus altitudinis was systematically *** mutualistic interaction of the bacteria and algae quadrupled the corrosion rate in comparison to the individual effect of the bacterium or algal strain ***,the corroded metal appeared to be an accelerator that can stimulate the activity of the *** and aggravate the biological pollution based on the result of 62.3%up-regulation of the key photosynthesis *** corrosion-biofouling-accelerated corrosion-deteriorated biofouling formed a vicious cycle.

关键词： Algal-bacterial symbiosis Marine biofouling Carbon steel Corrosion products

Spin Thermoelectric Effects in a Three-Terminal Double-Dot Interferometer

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2018年第11期69卷 625-632页

作者： Feng Liang Ben-Ling Gao guang song Yu Gu Department of Applied Physics Huaiyin Institute of Technology Department of Physics and Siyuan Laboratory Jinan University

We theoretically investigate the thermoelectric properties of a three-terminal double-dot interferometer with Rashba spin-orbit interaction. It is found that with some temperature distributions a thermal spin current can even be produced without the help of magnetic flux and by tuning the spin interference effect in the system, a pure spin or fully spin-polarized current can be driven by temperature differences. For the cases that two of the terminals are held at the same temperature, the charge (spin) thermopower and the charge (spin) figure of merit are defined and calculated in the linear response regime. With some choices of the system parameters the calculated spin and charge thermopowers are of the same order of magnitude and the charge figure of merit can exceed 1.

关键词： thermoelectric effects thermal spin current Rashba spin-orbit interaction,interferometer nonequilibrium Green's function method