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42篇 您的检索式:作者名="F.V."
    题名 作者 年代 出处 被引量
1喷流对飞机尾流涡影响的试验研究显示文摘飞机产生的尾流涡,特别是大尺度的翼尖涡,对尾随其后的飞行器是非常有害的,本文旨在探索利用飞机发动机产生的喷流加速尾流涡消亡的方法。试验采用简化的飞机模型(有尾翼),建立了包含一对翼尖涡及一对反向旋转的尾翼涡(通过以负迎角安装尾翼得到)的4涡尾流系统。在无外来扰动的情况下,不同的尾翼设置下得到的尾翼涡对翼尖涡的作用效果不同,有的能导致翼尖涡提前消亡,有的则不能。考察了不同强度的喷流对不同4涡尾流系统的影响,且作为对比,对无尾翼(2涡系统)及无喷流下的各种情况也分别作了观测。试验在拖曳水槽中进行,运用体视粒子图像测速(SPIV)技术,观测了与模型拖曳方向垂直的、从机翼后缘到下游约45翼展间均布的一系列切面。结果表明:当喷流直接作用于涡时,其效果主要取决于两者之间的初始距离及相对强度;而当喷流作用于整个4涡尾流系统时,其引入的扰动对不同的系统均能起到一定程度的改善作用,这种作用的关键在于利用喷流优化对翼尖涡进行扰动的机制,而不仅仅取决于喷流的强度。黄烁桥 申功忻 Robert Konrath Carl F.v. Carmer Kompenhans Jurgen 2010航空学报2010,31,5:13
2飞机尾流控制的SPIV实验研究显示文摘利用简化的飞机模型,通过改变尾翼的迎角及展弦比,试图建立一种能加速自我消亡的尾流涡系统。该实验在拖曳水槽中进行,运用SPIV(体视粒子图像测速技术)系统进行测量,获得了一系列空间切面的2D/3C(二维/三分量)数据,给出了三种不同尾翼情况(两种有尾翼情况及一种无尾翼情况)下的SPIV观测结果,并将这几种情况作了对比。黄烁桥 申功炘 Robert Konrath Carl F.v. Carmer Kompenhans Jürgen 2009实验流体力学2009,23,1:7
3多排CT探测器的数目和峰电压对肾囊肿假性增强的效应显示文摘目的用体模评价探测器的数目和峰电压对肾囊肿假性增强的效应。材料与方法本研究基于CT体模,无需经审查委员会批准。F.V. Coakley B.N. Joe S. Prevrhal L.A. Landeras 苏晨 2008国际医学放射学杂志2008,31,A06:6
4Pathogenesis of hepatitis B virus infection显示文摘F.V. Chisari M. Isogawa S.F. Wieland 2009Pathologie Biologie2009,,4:4
5First results from the CMD-3 Detector at the VEPP-2000 Collider显示文摘R.R. Akhmetshin A.V. Anisyonkov S.A. Ahokhin V.M. Aulchenko V.S. Banzarov L.M. Barkov N.S. Bashtovoy D.E. Berkaev A.E. Bondar A.V. Bragin S.I. Eidelman D.A. Epifanov L.B. Epshteyn G.V. Fedotovich S.E. Gayazov A.A. Grebenuk D.N. Grigoriev E.N. Gromov F.V. 2012Nuclear Physics B (Proceedings Supplements)2012,,:2
6Drag Reduction in a Swimming Humboldt Penguin, Spheniscus Humboldti, when the Boundary Layer is Turbulent显示文摘An area of protruding feathers found around the beak of many penguin species is thought to induce a turbulent boun^dary layer whilst swimming. Hydrodynamic tests on a model Humboldt penguin, Spheniscus humboldti, suggest that induced turbulence causes a significant reduction in boundary layer height, flow separation, and an average of 31 % reduction in drag (1.0 m/s to 4.5 m/s). Visualisation of surface flow showed it to follow the body profile, over the feet and tail, before separating. Movement of the feet in swimming penguins correlates with steering of the bird. Induced turbulence may therefore further increase swimming efficiency by reducing the amount of foot movement required to direct the swimming bird.Alex R.Parfitt Julian F.V. Vincent 2005Journal of Bionic Engineering2005,2,2:2
7Pathogenesis of hepatitis B virus infection显示文摘F.V. Chisari M. Isogawa S.F. Wieland 2009Pathologie Biologie2009,,4:1
8The low fertility of repeat-breeder cows during summer heat stress is related to a low oocyte competence to develop into blastocysts显示文摘R.M. Ferreira H. Ayres M.R. Chiaratti M.L. Ferraz A.B. Araújo C.A. Rodrigues Y.F. Watanabe A.A. Vireque D.C. Joaquim L.C. Smith F.V. Meirelles P.S. Baruselli 2011Journal of Dairy Science2011,,5:1
9Comparative gas exchange performance during the wet season of three Brazilian Styrax species under habitat conditions of cerrado vegetation types differing in soil water availability and crown density显示文摘Gustavo Habermann Patricia F.V. Ellsworth Juliana L. Cazoto Edson Sim?o Angela C. Bieras 2010Flora2010,,4:1
10SEXTANT LOCALIZATION OF PROSTATE CANCER: COMPARISON OF SEXTANT BIOPSY, MAGNETIC RESONANCE IMAGING AND MAGNETIC RESONANCE SPECTROSCOPIC IMAGING WITH STEP SECTION HISTOLOGY显示文摘A.E. WEFER H. HRICAK D.B. VIGNERON F.V. COAKLEY Y. LU J. WEFER U. MUELLER-LISSE P.R. CARROLL J. KURHANEWICZ 2000The Journal of Urology2000,,2:1
11Activity of Alkaloid Extract of Carica papaya . Seeds on Reproductive Functions in Male Wistar Rats显示文摘F.V. Udoh P.B. Udoh E.E. Umoh 2005Pharmaceutical Biology2005,,6:1
12Pentoxifylline to Treat Radiation Proctitis: A Small and Inconclusive Randomised Trial显示文摘R. Venkitaraman J. Coffey A.R. Norman F.V. James R.A. Huddart A. Horwich D.P. Dearnaley 2008Clinical Oncology2008,,4:1
13Composition profile of horsetail ( Equisetum giganteum L.) oleoresin: comparing SFE and organic solvents extraction显示文摘Eliane M.Z. Michielin Louisiane F.V. Bresciani Leandro Danielski Rosendo A. Yunes Sandra R.S. Ferreira 2004The Journal of Supercritical Fluids2004,,2:1
14Toward Tailored Xerogel Composites: Local Dipolarity and Nanosecond Dynamics within Binary Composites Derived from Tetraethylorthosilane and ORMOSILs, Oligomers or Surfactants显示文摘G.A. Baker S. Pandey E.P. Maziarz F.V. Bright 1999Journal of Sol - Gel Science and Technology1999,,1:1
15Search for the process e + e ? → η ′ ( 958 ) with the CMD-3 detector显示文摘R.R. Akhmetshin A.V. Anisenkov V.M. Aulchenko V.Sh. Banzarov N.S. Bashtovoy D.E. Berkaev A.E. Bondar A.V. Bragin S.I. Eidelman D.A. Epifanov L.B. Epshteyn A.L. Erofeev G.V. Fedotovich S.E. Gayazov A.A. Grebenuk D.N. Grigoriev E.N. Gromov F.V. Ignatov S.V. 2014Physics Letters B2014,,:1
16叔胺及DEHPA对钼和钨的溶剂萃取显示文摘文章报道了25℃时,用叔胺和DEHPA分别萃取钼和钨,及用DEHPA分离硫酸溶液中钼-钨的平衡数据。有机相的体积比为10%萃取剂-2%乙基己醇-煤油,其中萃取剂溶解于煤油中,乙基己醇作相调节剂。萃取数据是在钼的初始浓度为1~10g/l和钨的初始浓度5~10g/l,改变pH值、相比(O/A)和钨钼比的条件下得到的。叔胺在pH°=1~2时萃取钼和在pH°=3时萃取钨都有很高的萃取率,而DEHPA只在pH°=3时选择性地萃取钼。在pH°=3和O/A=1/2条件下,钨钼有最佳的分离效果。CoCa.J Diez F.V. MorisM.A 邓怡梅 1992江西有色金属1992,6,2:1
17Pathogenesis of hepatitis B virus infection显示文摘F.V. Chisari M. Isogawa S.F. Wieland 2009Pathologie Biologie2009,,4:1
18A comparison of the behavior of solar silicon material in different production processes显示文摘R.O. Bell M. Prince F.V. Wald W. Schmidt K.D. Rasch 1996Solar Energy Materials and Solar Cells1996,,:1
19Pathogenesis of hepatitis B virus infection显示文摘F.V. Chisari M. Isogawa S.F. Wieland 2009Pathologie Biologie2009,,4:1
20Study of conversion decays φ → ηe + e ? , η → e + e ? γ and η → π + π ? e + e ? at CMD-2显示文摘R.R. Akhmetshin E.V. Anashkin M. Arpagaus V.M. Aulchenko V.Sh. Banzarov L.M. Barkov N.S. Bashtovoy A.E. Bondar D.V. Bondarev A.V. Bragin D.V. Chernyak S.I. Eidelman G.V. Fedotovitch N.I. Gabyshev A.A. Grebeniuk D.N. Grigoriev V.W. Hughes F.V. Ignatov P.M. 2001Physics Letters B2001,,3:1
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