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29篇 您的检索式:作者名="J.David"
    题名 作者 年代 出处 被引量
1日常仪式化行为:以知青为例的研究显示文摘In recent years, sociologists and social psychologists have increasingly recognized the importance of daily and secular ritualized practice. Research shows that, when the ritualized daily practices that actors engage in are disrupted, the reconstitution of ritualized daily activities enables people to cope with or adapt to such situations, i.e., they alleviate the psychological tension and interactional problems caused by such disruptions. Ritualized daily practices help provide meaning, focus, and a sense of stability to social behavior. This article focuses on the ritualized daily practices engaged in by a special group of people in Chinese history, the “Educated Youth.” Using content analysis, this study discusses the composition, significance and function of ritual activities for these individuals.吴艳红 J.David Knottnerus 2005社会2005,25,6:17
2日常仪式化行为的形成:从雷锋日记到知青日记显示文摘本文关注日常仪式化行为的形成。以知青日记写作为例,本文深入探讨了这一日常仪式化行为形成的过程。因其日常性和表达实践中的个人性,日常仪式化行为的社会性是容易被忽略的。本文主要利用结构仪式化理论,证明日常仪式化行为包含了丰富的社会内涵和群体存在特征,社会、群体存在特征和个人在日常仪式化行为形成中具有关键的作用。社会领域的公共行为是群体和个人日常仪式化行为的真正来源,群体的存在特征则为群体成员复制、选择、调整甚至改变这些公共行为提供了条件,而对社会公共行为和群体特征的估量则是由个人完成的。吴艳红 J.David Knottnerus 2007社会2007,27,1:11
3Kinematic calibration of a class of parallel kinematic machines(PKM) with fewer than six degrees of freedom显示文摘By taking a 3-DOF translational milling machine as an example, this paper investigates the kinematic calibration of PKM systems with fewer than 6-DOF. The error mapping function is formulated in such a way that the geometric errors affecting the compensatable and uncompensatable pose errors can be separated. Based upon the previous investigation, a hierarchical approach to the geometric error identification is proposed. The compensation strategy is developed which is particularly suitable for the PKM systems with translational moving capability. The experiment has been carried out to verify the effectiveness of the proposed approach and the results show that the accuracy can be significantly improved.黄田 唐国宝 李思维 李亚 G.Derek Chetwynd J.David Whitehouse 2003Science China(Technological Sciences)2003,46,5:8
4Cyclic load testing of pre-stressed rock anchors for slope stabilization显示文摘The objective of this research was to assess the characteristics of seismic induced damage and the deformation patterns of pre-stressed cement-grouted cables that are used for rock slope stabilization projects subjected to quasi-static cyclic loading.The experimental configuration includes the installation of 15 pre-stressed cables in a slope model made of concrete blocks(theoretically rigid rock mass) on top of a pre-existing sliding surface.The study showed that:(i) The pre-stressed cables exhibited great seismic performance.Rapid displacement of the model blocks was observed after the complete loss of the initial pre-stress load under continued applied cyclic loads and exceedance of the state of equilibrium,which implies the higher the initial pre-stress load,the better the seismic performance of the rock anchor;(ii) The failure of the pre-stressed cables was due to fracture at the connection of the tendons and cable heads under cyclic loading.The sequence of failure had a distinct pattern.Failure was first observed at the upper row of cables,which experienced the most severe damage,including the ejection of cable heads.No evidence of de-bonding was observed during the cyclic loading;(iii) The stress distribution of the bond length for pre-stressed cables was highly non-uniform.High stress concentrations were observed at both the fixed end and the free end of the bond length both before and immediately after the state of equilibrium is exceeded.The results obtained can be used to evaluate the overall performance of pre-stressed rock anchors subject to seismic loading and their potential as rockfall prevention and stabilization measures.ZHENG Da LIU Fang-zhou JU Neng-pan FROST J.David HUANG Run-qiu 2016Journal of Mountain Science2016,13,1:5
5Wet Pressing Models to Reduce Energy Consumption in Papermaking显示文摘Improved wet pressing reduces the need for drying and consequently energy needed in papermaking. Accordingly, it is desirable to optimize wet pressing, but the process is very complex with many interacting variables. It is therefore desirable to employ a mathematical model that accounts for the major variables to estimate the effects of changes in equipment and operating variables. This paper descibes such a model called the Decreasing Permeability Model (DPM). Mill and pilot plant applications over a wide range of basis weights for paper and paper board are described.J.David McDonald Richard J.Kerekes Joe R.Zhao 2019Paper And Biomaterials2019,4,1:5
6碳化硅与氟钛酸钾原位反应制备AA6061/TiC铝基复合材料的显微组织与力学性能表征(英文)显示文摘采用K_2TiF_6无机盐和SiC陶瓷颗粒与铝熔体原位反应制备不同含量TiC颗粒(0,2.5%,5%,质量分数)增强AA6061铝合金。为分解SiC释放碳原子,合金在高温下进行铸造,并保温一段时间。X射线衍射分析表明铝基复合材料中只生成TiC颗粒而未见其他金属间化合物。采用场发射扫描电子显微镜(FESEM)和背散射电子衍射(EBSD)分析AA6061/TiC复合材料的显微组织。结果表明原位生成的TiC颗粒分布均匀,界面清晰,结合良好,并具有立方、球形和六方等形状。EBSD图像表明TiC颗粒对复合材料具有明显的晶粒细化效果。TiC颗粒可提高铝基复合材料的显微硬度和抗拉强度。K.JESHURUN LIJAY J.DAVID RAJA SELVAM I.DINAHARAN S.J.VIJAY 2016Transactions of Nonferrous Metals Society of China2016,26,7:4
7复合铸造制备稻壳灰增强AA6061铝合金及表征(英文)显示文摘稻壳灰(RHA)是一种有潜力的廉价铝基复合材料的增强颗粒。采用复合铸造方法制备不同稻壳灰含量(0,2%,4%,8%,质量分数)增强的AA6061铝合金复合材料。采用X射线衍射和扫描电镜对所制备复合材料进行表征。X射线衍射谱表明AA6061/RHA铝基复合材料中除RHA颗粒外未形成其他金属间化合物。扫描电镜图片表明RHA颗粒均匀分布在铝基体中。RHA基本分布在晶粒内部。此外,RHA颗粒与铝基体结合良好并形成清晰的界面。RHA颗粒的添加能提高铝基复合材料的显微硬度和抗拉强度。铝基复合材料的拉伸行为与其微观组织密切相关。J.ALLWYN KINGSLY GLADSTON N.MOHAMED SHERIFF I.DINAHARAN J.DAVID RAJA SELVAM 2015Transactions of Nonferrous Metals Society of China2015,25,3:2
8Fibre Treatment Uniformity in Pulp Refining显示文摘This paper explores implications of previous work which suggested that pulp refining is achieved by a small number of impacts.As a consequence,the purpose of multiple bar crossings in refiners is to expose many fibres to a few effective cycles,not to impose many cycles on each fibre.Based on this postulate,tensile strength increase was found to be well described by a cumulative probability equation having two parameters:(a) number of bar crossings and(b) probability of a successful refining outcome at each crossing.In this paper,this concept further with additional refiner data was explored and the link between the probability term and measurable refiner variables was examined.By proposing the possibility,these two parameters may be a desirable alternative to specific energy and specific edge load for characterizing refining action.Richard J.Kerekes J.David McDonald 2018Paper And Biomaterials2018,3,3:2
9Consolidation and efficiency in the US life insurance industry显示文摘J.David Cummins Sharon Tennyson Mary A. Weiss 1999Journal of Banking and Finance1999,,2:1
10Evolution in the treatment of complex blunt liver injuries显示文摘Eddy H Carrillo Christopher Wohltmann J.David Richardson Hiram C Polk 2001Current Problems in Surgery2001,,1:1
11Adult chronic rhinosinusitis: Definitions, diagnosis, epidemiology, and pathophysiology显示文摘Michael S. Benninger Berrylin J. Ferguson James A. Hadley Daniel L. Hamilos Michael Jacobs David W. Kennedy Donald C. Lanza Bradley F. Marple J.David Osguthorpe James A. Stankiewicz Jack Anon James Denneny Ivor Emanuel Howard Levine 2003Otolaryngology - Head and Neck Surgery2003,,3:1
12Anticipating the future high-tech competitiveness of nations: Indicators for twenty-eight countries显示文摘J.David Roessner Alan L. Porter Nils Newman David Cauffiel 1996Technological Forecasting & Social Change1996,,2:1
13Microtensile testing of dentin adhesives显示文摘Rebecca F. Schreiner Robert P. Chappell Alan G. Glaros J.David Eick 1998Dental Materials1998,,3:1
14Phytochemistry and medicinal plants显示文摘J.David Phillipson 2001Phytochemistry2001,,3:1
15Recent Advances in Stroke Prevention显示文摘Stroke is the most important cause of death and disability in China,and most strokes(~80-90%)are preventable.Recent advances in a number of measures to reduce stroke are discussed in this narrative review,including smoking cessation,a Mediterranean pattern of eating,salt restriction,B vitamins to lower homocysteine,antiplatelet therapy,anticoagulants and the management of patent foramen ovale and carotid stenosis.Lowering of homocysteine with B vitamins does prevent stroke,but patients with variants of MTHFR require higher doses of folic acid,and because of harm from cyanocobalamin among persons with renal impairment,we should use methylcobalamin or oxocobalamin instead.Aspirin resistance appears to be due to enteric coating,and>50% of Chinese have a reduced response to clopidogrel because of variants of CYP2C19,required to convert the prodrug to its active form.Direct acting oral anticoagulants(DOACs)have revolutionized anticoagulation;important differences among the DOACs are discussed.Percutaneous closure of patent foramen ovale(PFO)does reduce the risk of stroke,but in most patients with stroke and PFO the PFO is incidental;it is important to identify the subgroup in whom paradoxical embolism was the probable cause of the stroke.Some patients with PFO would be better treated with anticoagulants because of the risk of pulmonary embolism.Carotid stenting carries a higher risk in older patients,and most patients with asymptomatic carotid stenosis would be better treated with intensive medical therapy than with either stenting or endarterectomy;the few who could benefit can be identified.J.David Spence 2020中华脑血管病杂志(电子版)2020,14,1:1
16Securitization of Life Insurance Assets and Liabilities显示文摘Alex C J.David 0,,02:1
17Characterization of fly ash from Kentucky power plants显示文摘James C. Hower J.David Robertson Gerald A. Thomas Amy S. Wong William H. Schram Uschi M. Graham Robert F. Rathbone Thomas L. Robl 1996Fuel1996,,4:1
18Behaviour, performance and health indicators of welfare for dairy cows housed in strawyard or cubicle systems显示文摘Jose A Fregonesi J.David Leaver 2001Livestock Production Science2001,,2:1
19Adult chronic rhinosinusitis: Definitions, diagnosis, epidemiology, and pathophysiology显示文摘Michael S. Benninger Berrylin J. Ferguson James A. Hadley Daniel L. Hamilos Michael Jacobs David W. Kennedy Donald C. Lanza Bradley F. Marple J.David Osguthorpe James A. Stankiewicz Jack Anon James Denneny Ivor Emanuel Howard Levine 2003Otolaryngology - Head and Neck Surgery2003,,3:1
20A real options approach to valuing and negotiating licensing agreements显示文摘Sing Ru Hoe J.David Diltz 0,,52:1
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