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176篇 您的检索式:作者名="LEONHARD"
    题名 作者 年代 出处 被引量
1PVC管道施工机械手夹持对接装置的研究显示文摘目的研究与开发管道施工机械手,解决地下埋设管线施工中的安全、施工质量和施工效率及夹持对接装置的核心技术问题.方法研究与分析了机械手的夹持对接装置的工作原理,管节在工作中受力状态和改善管节受力的措施,制造了管道机械手的实验用样机,以挖掘机为运载平台,用机械手实现管节的就位与对接.并在现场进行了实验.结果验证了这种夹持对接装置的工作原理和各主要部分的力学分析表达式,给出的改善管节受力状态的措施切实可行.结论机械手夹持对接装置的原理和所得到的计算表达式可以应用于产品开发,提出的改善管节受力状态的措施有助于机械手安全可靠地工作,提高管道施工的机械化水平.李斌 蔺任志 Leonhard E.Bernold 邹彩侠 2007沈阳建筑大学学报(自然科学版)2007,23,3:4
2Automated classification of duodenal imagery in celiac disease using evolved Fourier feature vectors显示文摘Andreas Vécsei Thomas Fuhrmann Michael Liedlgruber Leonhard Brunauer Hannes Payer Andreas Uhl 2009Computer Methods and Programs in Biomedicine2009,,2:2
3超临界CO_(2)对碳酸盐岩储层的溶蚀作用研究显示文摘为研究CO_(2)地质封存条件下碳酸盐岩储层的物化反应规律,以四川盆地震旦系灯影组碳酸盐岩储层为研究对象,开展储层条件下的碳酸盐岩与超临界CO_(2)反应室内模拟实验。采用压力脉冲衰减法、扫描电镜法和核磁共振法分析了碳酸盐岩孔隙度、渗透率、孔隙结构对超临界CO_(2)环境的响应特征,实验后碳酸盐岩孔隙度、渗透率增大,孔隙度变化率最大为32.35%,渗透率扩大11倍,而且实验后产生了微裂缝,20~50μm的孔径占比增大;采用X射线衍射法、接触角法分析碳酸盐岩的矿物组分和润湿性,主要矿物石英平均含量增加了12.6%,方解石平均含量减少了22.3%,亲水性增强;采用巴西劈裂法测试超临界CO_(2)浸没前后碳酸盐岩的岩石力学特性,发现其抗拉强度下降了18.28%,造成了碳酸盐岩损伤,载荷-位移曲线经历更长的压实阶段。该文揭示了超临界CO_(2)溶蚀作用对碳酸盐岩孔隙度、渗透率、矿物组分、岩石力学性质的影响,为CO_(2)在碳酸盐岩储层中的地质封存提供理论支持。李颖 马寒松 李海涛 GANZER Leonhard 唐政 李可 罗红文 2023油气藏评价与开发2023,13,3:2
4Bosch公司180MPa电磁阀式共轨喷油器显示文摘电磁阀技术在共轨喷油器中经数百万次使用证实,其性能可靠。这种技术为进一步提高喷油压力和优化多次喷射能力提供了潜力。介绍了Bosch180MPa的CR12.5共轨喷油器,它装备了一种新型的电磁阀。Leonhard R 2010国外内燃机2010,,6:2
5Theory and application of passive SAW radio transponders as sensors 显示文摘 Gerd scholl Thomas Ostertag Holger Scherr Ulrich Wolff Frank Schmidt 1998IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control1998,45,5:1
6The addiction severity index a field study of internal consistency and validity 显示文摘Leonhard C Mulvey K Gastfriend DR 2000J Subst Abuse Treat2000,18,2:1
7Kidney- specific inactivation of the Pkdl gene induces rapid cyst formation in developing kidneys and a slow onset of disease in adult mice显示文摘Lantinga-van Leeuwen IS Leonhard WN van der Wal A 2007Hum Mol Genet2007,16,24:1
8Correlation of the solubility of low-volatile organic compounds in near-and supercritical fluids显示文摘Thomas Kraska Kai O Leonhard Dirk Tuma 2002Journal of Supercritical Fluids2002,23,:1
9Free amino acids in the haemolymph of honey bee queens(Apis mellifera L.)显示文摘N. Hrassnigg B. Leonhard K. Crailsheim 2003Amino Acids (-)2003,,1:1
10Trench Cutter Case Histories and Their Possible Application for Offshore Piles as Relieve Drilling显示文摘Giovanni Spagnoli Arthur Bi Leonhard Weixler 2014Geotechnical and Geological Engineering2014,,3:1
11Thick-film chemical sensors 显示文摘 LEONHARD V ERDMANN H 1991Sensors and Actuators1991,4,34:1
12Potential gains through welded wire fabric reinforcement显示文摘Leonhard B E Chang P 1992Journal Of Construction Engineering and Management1992,118,2:1
13Field-oriented con- trol of a standard AC motor using microprocessors 显示文摘GABRIEL R LEONHARD W NORDBY C 1980IEEE Transactions on Industry Applications1980,16,2:1
14Development of a tandem repeat-based multilocus typing system distinguishing Babesia bovis geographic isolates显示文摘Agustina Perez-Llaneza Marina Caballero Eugenia Baravalle Maria Mesplet Juan Mosqueda Carlos E. Suarez Ignacio Echaide Frank Katzer Gabriela M. Pacheco Monica Florin-Christensen Leonhard Schnittger 2009Veterinary Parasitology2009,,2:1
15Foxp3 ~ regulatory T cells protect the liver from immune damage and compro- mise virus control during acute, experimental hepatitis B virus infec- tion显示文摘Leonhard Stross Johannes Gunther Georg Gasteiger 2012Hepatology2012,56,3:1
16Microbial findings at failing implants 显示文摘Leonhard A Renvert S Dahlen G 1999Clin Oral Implants Res1999,10,:1
17Indications for Surgical Management of Genitourinary Tuberculosis显示文摘Peter Carl Leonhard Stark 1997World Journal of Surgery1997,,5:1
18Theory and ap plication of passive SAW radio transponders as sensors 显示文摘 Scholl Gerd Ostertag 1998IEEE Transsctions on Ultrasnics Ferroelectrics and Frequency Control1998,45,5:1
19Femoral Fractures in Adolescents :A Comparison of Four Methods of Fixation 显示文摘Leonhard E Ramseier Joseph A 2010J Bone Joint Surg (Am)2010,92,:1
20Flow-Field Analysis of Anti-Kidney Vortex Film Cooling显示文摘Film cooling is an important measure to enable an increase of the inlet temperature of a gas turbine and, thereby, to improve its overall efficiency. The coolant is ejected through spanwise rows of holes in the blades or endwalls to build up a film shielding the material. The holes often are inclined in the downstream direction and give rise to a kidney vortex. This is a counter-rotating vortex pair, with an upward flow direction between the two vortices, which tends to lift off the surface and to locally feed hot air towards the blade outside the pair. Reversing the rotational sense of the vortices reverses these two drawbacks into advantages. In the considered case, an anti-kidney vortex is generated using two subsequent rows of holes both inclined downstream and yawed spanwise with alternating angles. In a previous study, we performed large-eddy simulations (which focused on the fully turbulent boundary layer) of this anti-kidney vortex film-cooling and compared them to a corresponding physical experiment. The present work analyzes the simulated flow field in detail, beginning in the plenum (inside the blade or endwall) through the holes up to the mixture with the hot boundary layer. To identify the vortical structures found in the mean flow and in the instantaneous flow, we mostly use the λ 2 criterion and the line integral convolution (LIC) technique indicating sectional streamlines. The flow regions (coolant plenum, holes, and boundary layer) are studied subsequently and linked to each other. To track the anti-kidney vortex throughout the boundary layer, we propose two criteria which are based on vorticity and on LIC results. This enables us to associate the jet vortices with the cooling effectiveness at the wall, which is the key feature of film cooling.Lars Grf Leonhard Kleiser 2012Journal of Thermal Science2012,21,1:1
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