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3篇 您的检索式:作者名="E.Montgomery"
    题名 作者 年代 出处 被引量
1EMP control and characterization on high-power laser systems显示文摘Giant electromagnetic pulses(EMP) generated during the interaction of high-power lasers with solid targets can seriously degrade electrical measurements and equipment. EMP emission is caused by the acceleration of hot electrons inside the target, which produce radiation across a wide band from DC to terahertz frequencies. Improved understanding and control of EMP is vital as we enter a new era of high repetition rate, high intensity lasers(e.g. the Extreme Light Infrastructure).We present recent data from the VULCAN laser facility that demonstrates how EMP can be readily and effectively reduced. Characterization of the EMP was achieved using B-dot and D-dot probes that took measurements for a range of different target and laser parameters. We demonstrate that target stalk geometry, material composition, geodesic path length and foil surface area can all play a significant role in the reduction of EMP. A combination of electromagnetic wave and 3 D particle-in-cell simulations is used to inform our conclusions about the effects of stalk geometry on EMP,providing an opportunity for comparison with existing charge separation models.P.Bradford N.C.Woolsey G.G.Scott G.Liao H.Liu Y.Zhang B.Zhu C.Armstrong S.Astbury C.Brenner P.Brummitt F.Consoli I.East R.Gray D.Haddock E Huggard E J.R.Jones E.Montgomery I.Musgrave E Oliveira D.R.Rusby C.Spindloe B.Summers E.Zemaityte Z.Zhang Y.Li P.McKenna D.Neely 2018High Power Laser Science and Engineering2018,6,2:3
2斑翅肩花蝽对铁杉球蚜的捕食作用显示文摘室内用铁杉球Adelges tsugae Annand(Hemlock woolly adelgids)蚜卵、1~4龄若虫、成虫饲养斑翅肩花蝽Tetraphleps galchanoides Ghauri,研究斑翅肩花蝽对铁杉球蚜Adelges tsugae Annand(Hemlock woolly adelgids)的捕食效应。结果表明,斑翅肩花蝽对铁杉球蚜的捕食功能反应属于HollingⅡ型反应,对球蚜密度的捕食干扰反应可能存在种内的干扰作用。对于同一发育期同一密度猎物,斑翅肩花蝽成虫或若虫在高密度条件下的日均捕食量均显著高于低猎物密度下的日均捕食量;而对于不同发育期不同密度猎物,斑翅肩花蝽在低猎物密度时对测定的铁杉球蚜6个不同虫态无明显选择性;在中、高密度时斑翅肩花蝽对测定的铁杉球蚜的不同虫态表现出明显喜好性差异,若虫最喜好食铁杉球蚜卵和1龄若虫,成虫最喜好食铁杉球蚜4龄若虫和成虫。为评价和利用斑翅肩花蝽对铁杉球蚜防治作用进行了讨论。李立 Michael E.Montgomery 虞国跃 2009昆虫知识2009,46,1:2
3定期检测可提高陆地防喷器组的可靠性李伟 Micheal E.Montgomery 1994国外石油机械1994,,2:0
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