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5篇 您的检索式：作者名="W.Powell"

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		题名	作者	年代	出处	被引量
	1	航天飞机的防热毡显示文摘尽管有关航天飞机防热系统的防热瓦已有许多文献作过介绍,但很少有文献谈及防热毡,而这种防热毡已经取代了轨道器机身上的大部分白色防热瓦。这种称为“先进的柔性多次使用表面绝热层”(AFRSI)的被状防热毡是把二氧化硅纤维絮夹在编织的二氧化硅(石英)织物中制成的,将这些防热毡用二氧化硅纤维缝织在一起并使之增强,所以它看上去像毡子一样。	Joel W.Powell 西印	1992	国外导弹与航天运载器1992，，8：	2
	2	The Iron Cage Revisited:Institutional Isomorphism and collective Rationality in Organizational Fields显示文摘	Paul J.DiMaggio Walter W.Powell		0，，02：	1
	3	Amplified fragment length polymorphism (AFLP) analysis of genetic variation in Moringa oleifera Lam.显示文摘	G. M.MULUVI J. I.SPRENT N.SORANZO J.PROVAN D.ODEE G.FOLKARD J. W.McNICOL W.POWELL	2003	Molecular Ecology2003，，3：	1
	4	Microfiltration isolation of human urinary exosomes for characterization by MS显示文摘	Michael L.Merchant David W.Powell Daniel W.Wilkey Timothy D.Cummins Jeroen K.Deegens Ilse M.Rood K. JillMcAfee CorneliaFleischer EliasKlein Jon B.Klein	2010	Prot. Clin. Appl2010，，：	1
	5	稳定与不稳定平台训练对平衡扰动下运动员站姿调控的影响(英文)显示文摘Background:Athletes have been shown to exhibit better balance compared to non-athletes(NON).However,few studies have investigated how the surface on which athletes train affects the strategies adopted to maintain balance.Two distinct athlete groups who experience different types of sport-specific balance training are stable surface athletes(SSA) such as basketball players and those who train on unstable surfaces(USA) such as surfers.The purpose of this study was to investigate the effects of training surface on dynamic balance in athletes compared to NON.Methods:Eight NON,eight SSA,and eight USA performed five 20-s trials in each of five experimental conditions including a static condition and four dynamic conditions in which the support surface translated in the anteroposterior(AP) or mediolateral(ML) planes using positive or negative feedback paradigms.Approximate entropy(Ap En) and root mean square distance(RMS) of the center of pressure(Co P) were calculated for the AP and ML directions.Four 3 × 5(group × condition) repeated measures ANOVAs were used to determine significant effects of group and condition on variables of interest.Results:USA exhibited smaller Ap En values than SSA in the AP signals while no significant differences were observed in the ML Co P signals.Generally,the negative feedback conditions were associated with significantly greater RMS values than the positive feedback conditions.Conclusion:USA exhibit unique postural strategies compared to SSA.These unique strategies seemingly exhibit a direction-specific attribute and may be associated with divergent motor control strategies.	D.S.Blaise Williams Ⅲ Nicholas G.Murray Douglas W.Powell	2016	Journal of Sport and Health Science2016，5，1：	0

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