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Availability Analysis of Application Servers Using Software Rejuvenation and Virtualization

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Journal of Computer Science & Technology 2009年第2期24卷 339-346页

作者： Thandar Thein Jong sou Park Department Korea Aerospace University

Demands on software reliability and availability have increased tremendously due to the nature of present day applications. We focus on the aspect of software for the high availability of application servers since the unavailability of servers more often originates from software faults rather than hardware faults. The software rejuvenation technique has been widely used to avoid the occurrence of unplanned failures, mainly due to the phenomena of software aging or caused by transient failures. in this paper, first we present a new way of using the virtual machine based software rejuvenation named VMSR to offer high availability for application server systems. Second we model a single physical server which is used to host multiple virtual machines （VMs） with the VMSR framework using stochastic modeling and evaluate it through both numerical analysis and SHARPE （Symbolic Hierarchical Automated Reliability and Performance Evaluator） tool simulation. This VMSR model is very general and can capture application server characteristics, failure behavior, and performability measures. Our results demonstrate that VMSR approach is a practical way to ensure uninterrupted availability and to optimize performance for aging applications.

关键词： availability modeling software aging software rejuvenation virtual machine

Cell-free biocatalysis coupled with photo-catalysis and electro-catalysis: Efficient CO_(2)-to-chemical conversion

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Green Energy & Environment 2024年第9期9卷 1366-1383页

作者： Junzhu Yang Chi.k.t sou Yuan Lu key Laboratory of industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing100084China Department of Chemical Engineering Tsinghua UniversityBeijing100084China

The increasing atmospheric carbon dioxide (CO_(2)) concentration has exposed a series of crises in the earth's ecological *** to effectively fix and convert carbon dioxide into products with added value has attracted the attention of many ***-free enzyme catalytic system coupled with electrical and light have been a promising attempt in the field of biological carbon fixation in recent *** this review,the research progresses of photoenzyme catalysis,electroenzyme catalysis and photo-electroenzyme catalysis for converting carbon dioxide into chemical products in cell-free systems are systematically *** focus on reviewing and comparing various coupling methods and principles of photoenzyme catalysis and electroenzyme catalysis in cell-free systems,especially the materials used in the construction of the coupling system,and analyze and point out the characteristics and possible problems of different coupling ***,we discuss the major challenges and prospects of coupling physical signals and cell-free enzymatic catalytic systems in the field of CO_(2) fixation,suggesting possible strategies to improve the carbon sequestration capacity of such systems.

关键词： CO_(2)fixation Cell-free system Enzyme Photoenzyme catalysis Electroenzyme catalysis

Structural,Sintering and Electrical Properties of Cr-doped La_(0.6)Sr_(0.4)Cr_xFe_(1-x)O_(3-δ)(x=0.10,0.20) Oxides

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Journal of Materials Science & Technology 2012年第7期28卷 654-660页

作者： LinlinZhu Jong Pyo kim sou Hwan Son Jung Hoon Park State key SLaboratory of Catalysis.Dalian institute of Chemical Physics Chinese~Academy of Sciences Dalian 116023 China Greenhouse Gas Research Center Climate Change Technology Research Division Korea Institute of Energy ResearchDaejeon 305-343 Korea College of Chemistry and Materials Science Liaoning University of Petroleum and Chemical Technology Fushun113001 China

The perovskite Cr-doped La0.6Sr0.4CrxFe1-xO3-δ （x=0.10, 0.20） oxides were synthesized via the citrate gel method. The perovskite forming of the Lao.6Sr0.4CrxFel-xO3-δ （x=0.10, 0.20） oxides were studied by ther- mogravimetric analysis （TG）, differential scanning calorimetry （DSC）, and X-ray diffraction （XRD）. Structural and chemical stability under H2-containing helium atmospheres of Lao.6Sro.4CrxFel-xO3-δ （x=0.10, 0.20） were investigated by TG and XRD. The sintering microstructures of the perovskite Lao.6Sr0.4Cr2Fel-xO3-δ （x--0.10, 0.20） ceramics were investigated by scanning electron microscopy （SEM）, and the electrical conduc- tivities of both oxide ceramics were also measured up to 900℃. The results demonstrated that the chemical stability of the Co-free ***.4CrxFe1-xO3-δ （x=0.10, 0.20） oxides was significantly improved compared to the Co-containing Lao.6Sr0.4C00.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ oxides. The incorporation of Cr cations in the B-site of the pervoskite oxides resulted in the improved structural and chemical stability of the as-synthesized Lao.6Sr0.4CrxFe1-xO3-δ （x=0.10, 0.20） oxides.

关键词： Perovskite Crystal structure Sintering Electrical conductivity

Unsteady Flow Analysis of an Axial Flow Hydraulic Turbine with Collection Devices Comprising a Different Number of Blades

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Journal of Thermal Science 2015年第3期24卷 239-245页

作者： Yasuyuki Nishi Terumi inagaki Yanrong Li sou Hirama Norio kikuchi Department of Mechanical Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki 316-8511 JAPAN Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki 316-8511 JAPAN ibasei Ltd. 4-7-10 Kamine-cho Hitachi-shi Ibaraki 317-0064 JAPAN

We previously devised a new type of portable hydraulic turbine that uses the kinetic energy of an open-channel flow to improve output power by catching and accelerating the flow. The turbine contains an axial flow runner with an appended collection device and a diffuser section that is not axisymmetric. The objective of this study is to determine how interference between the collection device and the runner influences performance characteristics of the turbine. We investigated the performance characteristics of the turbine and flow field for different numbers of blades during both unsteady and steady flow. During an unsteady flow, the maximum values of power coefficients for three and two blades increased by approximately 8.8% and 21.4%, respectively, compared to those during a steady flow. For the three-blade runner, the power coefficient showed small fluctuations, but for the two-blade runner, the power coefficient showed large fluctuations. These fluctuations in the power coefficient are attributed to fluctuations in the loading coefficient, which were generated by interference between the runner and the diffuser section of the collection device.

关键词： Hydraulic Turbine Runner Collection Device Performance Unsteady Flow Analysis

Effect of collagen-induced residual stress on the frictional property of articular cartilage

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Biosurface and Biotribology 2018年第2期4卷 68-71页

作者： Hiromichi Fujie sou Morishita Seido Yarimitsu Graduate School of System Design Tokyo Metropolitan UniversityHachiojiTokyoJapan

Previous findings,such as split-line of the articular cartilage surface and curving of sliced cartilage specimen,would suggest that residual stress is contained in articular *** study was performed to determine the effect of collagen fibre-induced residual stress on the biphasic lubrication property of articular cartilage.A fibre-reinforced poroelastic model of articular cartilage was developed in *** the model,residual stress was contained in the collagen fibre in the surface layer by applying 1-5%of tensile *** friction analysis was performed between the model and a sphere at a friction speed of 1.0-10.0 mm/*** revealed that the coefficients of start-up and dynamic friction at second friction cycle were lower in residual stress model than in no-residual stress model,with the largest decreases observed at a friction speed of 1 mm/*** was obse rved that re hydration was promoted in the bearing area in residual stress *** results suggest that collagen-induced residual stress plays an important role in enhancing the biphasic lubrication property of articular cartilage.

关键词： friction stress residual

The Confucian Educational Philosophy and Experienced Teachers’Resistance:A Narrative Study in Macao

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Frontiers of Education in China 2016年第1期11卷 1-22页

作者： HUANG Hua sou kuan VONG Faculty of Education Zhaoqing UniversityZhaoqing 526061China Faculty of Education University of MacaoMacao 999078China

This study investigates experienced teachers’resistance in an era of neoliberalism in *** narratives of three experienced teachers are examined under a post-structuralist *** findings indicate that the traditional Chinese Confucian ideology of education guides the experienced teachers’professional practice and offers them an alternative subject position to inhabit that makes it possible for them to establish a critical distance from the prevailing norms imposed by the hegemony of *** a distance allows the experienced teachers to observe,to thi.k.otherwise and consequently to live out a different teaching life and to reassemble their identity around an empowered notion of *** study concludes that the Confucian ideology of education has contributed to the transformation of the contemporary discursive context of Macao by promising a future for education,a future with a revisioned future rather than a neoliberal incorporation of the past.

关键词： experienced teachers resistance post-structuralism

ANALYSiS OF THE SCALE PROPERTiES OF NUCLEAR STRUCTURE FUNCTiON

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Chinese Physics Letters 1984年第1期1卷 43-46页

作者： iU Feng Li Jia-rong LiU Lian-sou institute of Particle Physics Hua-zhong Normal UniversityWuhanChina

The structure function for the deep–inelastic scattering of electrons on He, Be, Al, Fe and Au are analysed. it is found that all these structure functions satisfy a kind of scale relation, and the scale parameter ξ... 详细信息

关键词： satisfy structure logarithmic

液晶光阀用ZnSSe薄膜的光电特性研究(英文)

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功能材料与器件学报 2002年第4期8卷 335-340页

作者：沈大可韩高荣杜丕一 ZHANG X.X. sou i.k. 浙江大学硅材料国家重点实验室杭州310027 香港科技大学物理系

用分子束外延法(MBE),在铟锡氧化物(iTO)导电玻璃衬底上生长了ZnSSe薄膜,详细研究了薄膜的光电特性。通过控制反应时的生长参数,制备出了符合紫外液晶光阀设计要求的光导层薄膜。室温下,该薄膜光谱响应截止边的响应度为0.01A/W,紫外/可... 详细信息

用分子束外延法(MBE),在铟锡氧化物(iTO)导电玻璃衬底上生长了ZnSSe薄膜,详细研究了薄膜的光电特性。通过控制反应时的生长参数,制备出了符合紫外液晶光阀设计要求的光导层薄膜。室温下,该薄膜光谱响应截止边的响应度为0.01A/W,紫外/可见光响应对比度大于103。薄膜的暗电阻率随薄膜晶粒增大而减小,在衬底温度为2900C时,所获得的ZnSSe薄膜具有4.3×1011Ω·cm的暗电阻率。频率从40Hz到4000Hz的交流特性测试,也证实该薄膜符合器件紫外成像的工作要求。

关键词：分子束外延 ZnSSe薄膜光电特性液晶光阀

分子束外延生长ZnSe自组织量子点光、电行为研究

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物理学报 2002年第2期51卷 310-314页

作者：卢励吾王占国 C.L.Yang J.Wang Z.H.Ma i.k.sou Weikun Ge 中国科学院半导体研究所半导体材料科学开放实验室北京100083 香港科技大学物理系

分别应用光致发光、电容电压和深能级瞬态傅里叶谱技术详细研究ZnSe自组织量子点样品的光学和电学行为 .光致发光温度关系表明ZnSe量子点的光致发光热猝火过程机理 .两步猝火过程的理论较好模拟和解释了相关的实验数据 .电容电压测... 详细信息

分别应用光致发光、电容电压和深能级瞬态傅里叶谱技术详细研究ZnSe自组织量子点样品的光学和电学行为 .光致发光温度关系表明ZnSe量子点的光致发光热猝火过程机理 .两步猝火过程的理论较好模拟和解释了相关的实验数据 .电容电压测量表明样品表观载流子积累峰出现的深度 (样品表面下约 10 0nm处 )大约是ZnSe量子点层的位置 .深能级瞬态傅里叶谱获得的ZnSe量子点电子基态能级位置为ZnSe导带下的 0 11eV ,这与ZnSe量子点光致发光热猝火模型得到的结果一致 .

关键词： Ⅱ-Ⅵ半导体自组织量子点 ZnSe 分子束外延生长光学特性电学特性硒化锌