简介：第一条为统一全国年节及纪念目的假期,制定本办法。第二条全体公民放假的节日:(一)新年,放假1天(1月1日);(二)春节,放假3天(农历正月初一、初二、初三);(三)劳动节,放假3天(5月1日、2

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简介：12月21日，安康张岭鑫洲家园34号、36号、38号住宅楼工程主体结构通过验收，质检、设计、地勘、监理及建设单位在进行了仔细而全面的现场检测后，提出验收意见，一致认为主体结构质量满足设计和规范要求，同意下道工序的施工，并对后续工程施工需注意的问题提出了具体要求。

简介：Turbiditycurrentsareflowsdrivenbysuspendedsedimentofflood-inducedturbidriverwaterwithexcessdensity.Suchcurrentsareoftenthegoverningfactorinreservoirsedimentationbytransportingfinematerialsoverlongdistancesanddeliveringthemajorityofdeposition,whichthusreducesthestoragecapacity.Therefore,thedesignandoperationofareservoirrequiresanaccuratepredictionofitsoccurrenceconditionandplungingposition,whichistheobjectiveofthepresentstudy.Thisarticlepresentsaverifiedalgebraicslipmixturemodelincludingmomentum,continuityandalgebraicvelocityexpressionstosimulate2-Dturbiditycurrents.Testexperimentsinamultiphaseflumewerecarriedout.Reynoldsnumber,sedimentconcentrationanddensimetricFroudenumberwereusedasparametersintheoccurrenceconditionanalysis.Theplungingofturbiditycurrentsmayproducerefluxandbackflowduetothedivingflowatthesurfaceoftheclearwater.ThesimilarexperimentalresultswerealsoobtainedbyPIVmeasurements

简介：Thispaperinvestigatestheswimmingperformanceoffishundulatorymotionwhichisthebasicforminlocomotionofaquaticalanimalfromahydrodynamicspointofview.Inparticular,thepropulsivecharacteristicsisdiscussed.Thethree-dimensionalpotentialflowoveramodelrectangularflexibleplateperformingthemotionwhichconsistsofaprogressivewaveofagivenwavelengthandphasevelocityalongthechordistreated.Vortexringmethodisusedtocalculatethethrust,thepowerrequiredandthehydrodynamicpropulsiveefficiency,etc.Thedependenceoftheseenergeticsoncertainphysicalparameters,suchastheaspectratio,thereducedfrequencyandthewavenumber,isdiscussed.Itisfoundthatasthewavetengthgetsclosetothebodylength,propulsiveperformanceisnolongersensitivetotheaspectratio.Somequalitativeexplanationofthefishswimmingphenomenaisalsogiven.

简介：Aprocessfornumericalanalysisofradialcirculationdistributionofpropellerbladeisproposedandpresented.Itisbasedontheresultsofnumericalsimulationofthevelocityfieldaroundpropellerbladesandinthewake.Thewell-knowntraditionalmethodusingtangentialvelocitydatainthewakeandapplyingStockes'stheoremwasalsoexaminedintheinvestigation.Theresultsfromtwoapproachesarecomparedwitheachother.Itisfoundthatifthetraditionalwayisutilized,inmanycasesanunexpected'hump'appearsinthecirculationdistributionatcertainouterradius.Theauthorscalculatedthecirculationsdirectlyaroundbladesections,anditisreferredasdirectmethod.Theunexpectedhumpofthecirculationdistributiondisappearsintheresultsofdirectmethod.Thisarticlealsodiscussesthereasonsoftheappearanceoftheunexpectedhumpintraditionalapproach.Thedirectmethodisproposedtohaveapotentialinanalyzingorverifyingtheradialroaddistributionfordesignedpropellerandthenumericalanalysisinsteadofexperimentalvalidationforcirculationdistributioncanbeasatoolinthepropellerdesignprocess.

简介：2006年11月14日，陕西省水利厅在陕西院召开《陕西省水利电力勘测设计研究院志》终审会，会议由厅办公室副主任许灏主持，副厅长李润锁、厅水志办主任李献华及郭青梅、陈恒基、樊维翰等专家与会。评审组专家对志书内容进行了认真细致的审评，认为该志内容丰富，资料详实，编写体例符合规约要求，达到了成志标准，一致同意通过终审；同时对一些具体问题提出了进一步修改完善的意见。

简介：ThispaperinvestigatesnumericallytheinherentirreversibilityinunsteadygeneralizedCouetteflowbetweentwoparallelplateswithvariableviscosity.ThenonlineargoverningequationsarederivedfromtheNavier-Stokesequationsandsolvednumericallyusingasemi-discretizationfinitedifferencemethodtogetherwiththeRunge-Kutta-Fehlbergintegrationscheme.Theprofilesofvelocityandthetemperatureobtainedareusedtocomputetheentropygenerationnumber,Bejannumber,skinfrictionandNusseltnumber.Theeffectsofembeddedparametersonentireflowstructurearepresentedgraphicallyanddiscussedquantitatively.

简介：Ananalyticalsolutionispresentedfortheradiationandthediffractionofacylindricalbodywithamoonpoolfloatingonthesurfaceofwaterwithafinitedepth.Theexpressionsforthepotentialsareobtainedbythemethodofseparationofvariables,andtheunknowncoefficientsaredeterminedbytheboundaryconditionsandthematchingrequirementsontheinterface.Theeffectsofthemoonpoolonthehydrodynamiccharacteristicsofthebodyareinvestigated.Somepeaksareobservedonthecurvesoftheaddedmassanddampingcoefficients,correspondingtotheresonantfrequenciesofthemoonpool.Theinternalfreesurfacemoveslikeapistonatacertainlowresonantfrequency.

简介：这研究的目的是在昆虫的前面的飞行进入物理卓见到不稳定的力量和相关机制。在前面的飞行的不稳定的力量被学习，基于有在一致流动的震荡的翻译和旋转的陪衬的一个虚拟模型问题，由解决有一个有限元素方法的二维的不可压缩的海军司烧方程。包括进展比率，击飞机的使倾向的角度，击振幅，和搭攻击的角度的振幅，典型参数的效果在力量和流动结构上被分析。

简介：本文叙述了奥地利伊布斯—佩森博伊格水电站改造后新的自动控制系统。

简介：9月26日，呼蓄项目首节压力钢管1号引水隧洞I-356／357（7号弯管定位节）成功安装并通过验收。

简介：党的十一届三中全会的胜利召开距今已20年了。20年来，在党的改革开放政策的指引下，在省水利厅党组的正确领导下，陕西院率先在全省水利系统推行技术经济改革，以水利规划、勘测、设计事业为中心，在实现多元化发展方面取得了巨大成绩。经济效益和职工收人有较大提高，工作、生活条件明显得到改善。全院综合实力和对外形象发生了显著变化。陕西院的辉煌发展归根到底得益于党的改革开放政策。

简介：Inthispaperthefiniteelementmethodisusedtosolvethetwo-dimensionalgradi-entcurrentproblem,Thesolutionisobtainedbytwo-stepexplicitmethod.ItisverifiedwithgoodagreementbythefielddataofferedbyXiamenE.P.A.,Fujian,P.R.C.Theauthorsrec-ommendthattheproposedmethodissuitablefortheanalysisandcomputationoflongwavesofepeiricseaattheseawardfirth.

简介：Thisarticlepresentsaspectralanalysisofwaveupliftloadsonahorizontaldeck.Thewaveupliftforcespectrumontheundersideofthedeckisobtained.Itisshownthatthewaveupliftforcespectraldensitydecreaseswiththeincreaseoftherelativeclearance1/3Δh/H.Theinfluencesofdifferentincidentwaveparameters,includingtherelativewaveheight1/3H/d,therelativedeckwidth/sBLandtherelativeclearance1/3Δh/Honthedimensionlesszerothspectralmomentoftheupliftforcesarediscussed.Itisfoundthatthezerothspectralmomentoftheupliftforcesincreaseswiththeincreaseoftherelativewaveheight1/3H/d,anddecreaseswiththeincreaseoftherelativeclearance1/3Δh/H.Anewdimensionlesspredictionmodelforthezerothspectralmomentofwaveupliftloadsonthedeckisproposedandtherelationshipbetweenthewaveupliftforcesandthezerothspectralmomentoftheupliftforceareobtained.

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简介：Inthispaper,thephenomenononcollapsibletubedisplacementoscillation,anewbehaviorofthecollapsibletubepuisatileflowhasbeenstudied.Theexperimentsshowthatthecollapsibletube,inwhichtheflowisperiodicpuisatileintheupstream,willoscillateasasimplesupportedbeamwhenitiscollapsedtocertainextent,andthatifthetubeiscollapsedcontinue,thisoscillationwilltendtoweakandcompletelydisappearlastly.Ananalyticalmodelcorrespondingtothecollapsibletubedisplacementoscillationanditsgovernedequationsaresetupfromtheexperimentbackground.Byanalysingthemodelandsolvingtheequations,thecollapsibletubedisplacementoscillationpatternandtheoscillationoccurringordisappearingcriterionareobtained.Theresultspredictedbythisstudyareinagreementwiththoseobservedfromexperimentphenomena.

简介：Thevelocitiesofboundarylayerflowsbetweentwoparalleloscillatingplatesseparatedbysmalldistance,i.e.,insocallednarrowchannel,weretheoreticallyandexperimentallystudied.ThefocuswasonthelaminarcasewheretheReynoldsnumberReAismuchsmallerthanthetransitionvalue.ThetheoreticalanalysisoftheStokeslayerinoscillatingflowoveranarrowchannelwasmadefirst.ThenLaserDopplerVelocimeter(LDV)wasemployedtomeasuretheStokesboundarylayeraboveanoscillatingflatplateandinsidetheoscillatingnarrowchannelatvariousReHnumbers.Atthesametime,thephaseangledifferencealongtheverticaldirectioninbothanalysisandexperimentwereprovided.Thegoodagreementsareshownbetweenthemeasuredresultsandthetheoreticalsolution.

简介：Anumericalstudywasconductedforthefullydevelopedlaminarflowinrotatingcurvedellipticalpipe.Duetotherotation,theCoriolisforcecanalsocontributetothesecondaryflow.Theinteractionofrotationandcurvaturecomplicatestheflowcharacteristics.Theboundary-fittedcoordinatewasadoptedtostudytheflowcharacteristicintherotatingsystems.Theeffectsofrotationontheflowtransitionwerestudiedindetail.Thegenerationandmergenceofvorticesinrotatingcurvedellipticalpipeswerealsocapturedforthefirsttime.Thesimulationresultsshowthattheflowforthecaseoflargeaspectratioofthecross-sectionismorelikelytobeunstablethanthatforsmallerone.

简介：Astochasticmodelwasdevelopedtosimulatetheflowinheterogeneousmediasubjecttorandomboundaryconditions.ApproximatepartialdifferentialequationswerederivedbasedontheKarhunen-Loeve(KL)expansionandperturbationexpansion.Theeffectofrandomboundaryconditionsonthetwo-dimensionalflowwasexamined.Itisshownthattheproposedstochasticmodelisefficienttoincludetherandomboundaryconditions.Therandomboundariesleadtotheincreaseofheadvarianceandvelocityvariance.Theinfluenceoftherandomboundaryconditionsonheaduncertaintyisexertedoverthewholesimulatedregion,whiletherandomnessoftheboundaryconditionsleadstotheincreaseofthevelocityvarianceinthevicinityofboundaries.