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12、眥T1髀雌髀覲".皿IillBIbwIB'9H:/9M<9861wriimsibnio'O'82:/£6IOOAyahuha(X/f,一k沸-IrllrlV十Iz-9r!4Ha百wvynuooso宙-r/1rJ刃.flxiBiw-B一五十LLJL-L-lJVKW.sl乎*TA匕TXMV4tnMW4he-I-11孑如-L$捋1/孑HI千洲口壓rdooswwoit琳'te醍11I:9I0Z娜聊耽凱鯽WF捋伸碰zoziton:(iijIi<£00ZH3h.(qjjo|euinofuean9uiv*flI)iabj3japsww

13、oit琳'te醍11I:9I0Z娜聊耽凱鯽WF捋伸碰zoziton:(iijIi<£00ZH3h.(qjjo|euinofuean9uiv*flI)iabj3japunxu81a打e20HiuiBipmosai|io以!inija攻,N'f!Q!1isv15*<VX-K-iu/y9q,q8q6qoiq親魁q£10W-9091"5湖80-6067-017l卜aj-8-91PZY£-otWMHWMHfsiwHHH-ftft®nwHU/-rryrnNNTn_r£HxzkVBvwuAlAb£7G箱期OL等

14、:棚撤蜥林酮靴黝的禳33atically)theofe1ica11yandexperimentallystudiedbylakingwalerificecontractionelfecl.Theanalyticalsolutionofthecylindricalrsllime.Furthermore!Ihevariationofdrainagetimewilhlieea$theidealfluidandconsideringheadlossandortankdrainagetimeistheoreticallyobtained(orthefisurfacevelocityandflowcoef

15、ficienti$discussed.Baseionthisitheequivalentintervalofdrainagetimeisproposed.1ntheexperiment!largecylindricaltankswilhdiffeienlsizedexitorificelocatingattheboUomaredesignedandfabricated.Thetankdrainagetimevaryingwiththeheightofliquidsurfaceismeamed.Theflowsalofequivalenttimeintervalisfurthervalidate

16、d,cu1ations.coefficientiscalculatedfromiheexperimentaldataandthepropoTheexperimentalresultsareingoodagreementwilhtheoreticalca1Keywordstankdrainagetime!freesuHacevelocity;flowcoefficient!headloss;orificecontraction(上帝頁)1(8.):13711376.2WangZHjLiuC,ShenZW»etal.Highcontrast1.16pWTi;sapphirelajersy

17、stemcombinedw:thadoublednd2TA5Ty_rei一rnzz2-I.cu.pa華時胃l:c機chirpedpulseamplificationschemeandafemlosecondop2012,2832972012,283297InterferenceofdiffractionbyadoublegratingXIAOGuohong'iZHONGXihua2iZHANGQian11.SchoolofSc:ence?XianJiaotongUniveisiIy>XianjShaanxi710049?China;2.SchoolofPhysicsPekingU

18、niverjityjBeijing1008711China)Abstract:Theelfeciofinterfeienceofdiffractionbyadoublegratingisworthytostudytheoreticallyandprovidespossibililiesoiapplication.WecalculatethepatternofFraunhoferdiffraclionbyaco$ine-styIedoublegratingwithawaveironIphase-factorsmethod.Someformulasaboutintensilie$ofeachord

19、erdiffractionarededuceda$onegratingtranslatesalonganother.Someexperimentie$ulhareshowntocoincidewiththediffractionpatternsbynumericalsimulation.Theseformulasformafoundationlorexperimentalapplications.0neoftheseobviousapp1icadonsistomeasuretheamplitudeandIhefrequencyolam:cro-vibration.Keywords!doublegrating;wavefrontpha$e-faclor$diffractionjmicro-vibralionDimensionalsolutionandconsiderationofthreelinependulumSHIWeigang'jYANTiantian2(1.C

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