简介：BCHydrohasnowcompletedworkonstage1oftheElsiedamupgradeinVancouverlsland,Canada.Thedam,partofthe27MWAshriverhydroelectricfacilitybuiltin1958,isbeingupgradedtoresistsmajorseismicevents.Darnsafetyinvestigationshadshownthatathinlayerofsaturatedloosematerialinthemaindamatapproximatelyel326mwouldliquefyduringamajorearthquake.

简介：IranhassignedacontractwithunnamedforeignfinanciersforUS$300Mtofundtwohalf-finisheddamschemes,accordingtoTehranradio.TheschemesaretheOsturdaminMianehinEastAzerbaijanprovinceandtheMollaSadradaminFarsprovince.TheOsturdamwillhaveastoragecapacityof2Bm^3anda160MWhydropowerstation.

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简介：ＴＨＥＩＮＩＴＩＡＬＦＬＯＷＳＴＡＴＥＯＦＡＢＲＯＫＥＮＤＡＭＣｈｅｎＹａｏ－ｓｏｎｇ；ＪｉａｎｇＴａｏ（ＰｅｋｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｂｅｉｊｉｎｇ１００８７１，Ｐ．Ｒ．Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｔｈｉｓｐａｐｅｒｕｔｉｌｉｚｅｓｔｈｅｍａ...

简介：Modernizationandmaintenanceofadamoftenrequireemptyingthereservoir,aprocessthatcancausemudbankinstabilitiesandenvironmentaldisturbances.Inordertoaddresstheproblemofmudbankcollapsecharacterization,astudyisconductedinpartnershipwiththeLaboratoireNationald'Hydraulique(LNH),asubsidiaryofElectricitédeFrance(EDF).Thispaperpresentsageotechnicalmodelingofsubmergedandemergentmudbankstabilityandacomparisonofthemodelresultswiththemeasurementscarriedoutthroughoutthewholereservoir.

简介：在台湾的Barlin水坝的失败，中国为在为快速的侵蚀和隧道恢复追随者建模评估概念提供重要案例研究故意、意外的水坝移动。我们使用了1D和quasi-2D的现在的建模努力解开了hydraulics和沉积模型(NETSTARS)建水坝评估discretization和parameterization怎么影响thefitofbedelevationpredictions到列在后面的观察失败。我们的分析评估了模型敏感到过去常定义剖面图的溪流试管的沉积运输功能，活跃的层厚度，和数字。结果显示那一)模型比到流试管的数字对活跃的层厚度和沉积运输功能更敏感，b)水坝移动模型的开发是可能的得益于及时改变活跃的层厚度，并且c)增加的侧面的discretization不看起来改善模型在我们的地点装入陡峭、很快改变的河环境。我们与之间的差别的讨论得出结论，识别对的需要，和1D的一般使用，quasi-2D，并且充分，2D在水坝移动和失败分析当模特儿。

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简介：Thenumericalsolutionofdamtoelineissolvedbasedonthedamdataandtopographicmapofdamlocated.ThedisplayofdamperspectiveisalsorealizedbyprogrammingofusingVC++andOpenGL.Theresearchresultsaboveprovidethefoundationofconstructiondesign,constructionloftingandinformationinquiry,whichavoidsthedrawbacksofonlyusingblueprintstodothesameworkinthepast.Themethodusedisusefulinpracticalengineering.

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简介：Amingatwaterconservancyprojectvisualization,ahidden-removalmethodofdamperspectivedrawingsisrealizedbybuildingahidden-removalmathematicalmodelforoverlappingpointslocationtosetupthehiddenrelationshipamongpointandplane,planeandplaneinspace.Onthisbasis,asanexampleofpanelrockfilldam,adamhidden-removalperspectivedrawingisgeneratedindifferentdirectionsanddifferentvisualanglesthroughadaptingVC++andOpenGLvisualizingtechnology.Theresultsshowthatthedataconstructionofthemodelissimplewhichcanovercomethedisadvantagesofconsiderableandcomplicatedcalculation.Thismethodalsoprovidesthenewmeanstodrawhidden-removalperspectivedrawingsforthoselandformsandgroundobjects.

简介：在源于监视的统计模型和错误不安处理的水坝指向multicollinearity问题，我们用截断的单个价值分解(TSVD)造了一个调整回归模型。在中国的一个地球岩石水坝作为一个例子被介绍并且讨论。分析由三步组成：当模特儿并且预报的multicollinearity察觉，规则化参数选择，和裂缝洞。概括交叉验证(GCV)功能和L曲线标准两个都在规则化参数选择被采用。部分最少平方的回归(PLSR)和逐步的回归也为比较被包括。结果显示TSVD能有希望地解决水坝回归模型的multicollinearity问题。然而，当TSVD由于规则化参数选择问题比逐步的回归和PLSR优异时，没有一般规则是可得到的作决定。当评估模型可靠性时，恰当的精确性和系数reasonability应该被考虑。

简介：InthispaperTVDexplicitschemesdevelopedrecentlyinCFDareusedtosimulatefivemodelsofboresduetodam-break.Numericalexperimentsarepresentedtodemonstratethattheyachievehighresolutionandgeneratenospuriousoscillationsandtoshowtheversatilityoftheschemes.

简介：TheTangjiashanlandslidedamfailedonJune10,2008,whichwasthelargestoneformedduringtheWenchuanearthquakeinChina.Nohumanliveswerelostinthisdamfailure.Thispaperpresentsadescriptionofthedam,includingthedamgeometry,thehydrographandthereservoircapacity,thediversionchannelandthedrainagefromthelake.Severalempiricalmodelsareappliedtopredictthebreachparameters,thepeakoutflowsandthereservoirvolumesduringthisbreachevent.Themainobjectiveofthestudyistocomparevariouspredictionmodelsandtomakerecommendationofthebestmodelforthepredictionofthebreachwidth,thefailuretime,andthepeakoutflow.ThebreachwidthspredictedbytheFroehlichmethodswithconsiderationsofthereservoirstoragesandtheeffectoffailuremodeareconsideredtobemorereasonable.Allpredictionmethodsdiscussedinthispaperarefoundtounderestimatethebreachformationtimeduetothecomplexmaterialandthelargethicknessofthedam.Theresultsfromthesoilconservationservices(SCS)methodcomparewellwiththeobservedpeakoutflow.TheMaronemethodincombinationwiththecoefficientexpressionsproposedbyMacchionegivesexcellentresultsinthesimulationofthereservoirvolume-levelcurve.

简介：数字阵列模块（DigitalArrayModule,DAM）是数字阵列雷达的核心部件,其设计高度集成,技术指标繁多,传统的测试系统效率不高。通过多路DAM自动测试系统设计的可行性分析,优化各技术指标的测试流程和方法,采用高速光纤调制解调、多路发射同步测试、移相精度快速测试等一系列测试技术,完成了4路DAM并行测试的多路DAM自动测试系统设计,并在生产线上进行了测试验证,在自测模式下完成4路DAM的测试时间小于50min,测试效率大幅提高,为我国某重点型号雷达的科研生产提供了重要支撑和保障。

简介：TheSeventhNationalPeople’sCon-gress(NPC)concludeditsfifth,andlast,sessiononApril3,1992inBeijing,endorsingtheStateCouncil’sgovernmentworkreport,threedraftlaws,andalsogiv-ingthego-aheadtothelong-disputedThreeGorgesdamproject.Ofthe2,633deputiesattendingclos-ingsessionheldinGreatHallofthePeople,1,767votedinfavourofthe57-billionyuan($10.5billion)ThreeGorgesdamprojecton

简介：Currently,thereareawiderangeoflinetypesinthefieldofarchdamdesigningandconstruction,andeachofthemmayhavetheirownstrengthandweaknessdisparately.Atrade-offbetweenthesize,stress,aswellastheconstructioncostandcomplexityofthedamneedstobemadeinordertoarriveatanewsolutioncalledthecycloidarchdam.ThroughredevelopmentofVBAusingAutoCAD,thearchringandthecenterofthearchlinehavebeendesigned.Also,thestressanalysisonparabolaandcycloidhavebeendone,whichprovidesatheoreticalprinciplethatthecycloidcouldberegardedasanewlinetypeofthearchdam.

简介：Ithasn’tbeeneasy,butalmostalloftheworkontheThreeGorgesProjectisonschedule,accordingtoacorporationoverseeingconstructionofthedam.TheChinaYangtzeThreeGorgesProjectDevelopmentCorporationhasreportedthatcontractorsandotherstaffareworkinghardtoensurethatthefloodseasondoesnotslowthedamproject.Thecompanyrecentlydetailedthemammothtasksthathavetakenplacesofar

简介：象腹股沟，纵的堤和防波堤那样的水力的结构在管理和水交通工程在家和国外投射的水里是普通的，它长有由稳固的集体结构的形式统治了。与是的刷子和石头造材料，这种结构有明显的工程效果。然而，它不仅要求巨大的大写的投资，而且在生态的环境上有否定影响。推迟的灵活水坝是一项创新工程措施，和水坝能目前被发现的这种类型的很少理论、试验性的研究。这篇论文学习机制和这个水坝的形状特征并且在三种形式之中为转变获得灵活水坝，漂流快活表示，和条件的动态平衡方程在水下水坝的形状。结果在设计申请是珍贵的并且能为持续开发由于特殊设计哲学，环境上的小否定效果和一致性为未来工作被用作引用。

简介：Aseismicstabilityassessmentofarchdam-foundationsystemsispresentedusingacomprehensiveapproach,inwhichthemainfactorsthatsignificantlyinfluencetheseismicresponseofanarchdam-foundationsystemareconsidered.Alargescalefiniteelementmodelwithover1milliondegreesoffreedomisconstructedfortheBaihetanarchdam(289mhigh),whichisunderconstructionintheSouthwestofChina.Inparticular,thecomplicatedgeologicalconditionswithfaultsintersectinginterlayershearweaknesszonesatthedambaseandthedamabutmentresistingforcebodyismodeledintheanalysis.Threeperformanceindicesareadoptedtoassesstheseismicstabilityofthearchdam.TheresultsdemonstratethattheopeningofthejointsoftheBaihetanarchdamissmallandthewaterstopinstalledbetweenthejointswouldnotbetornduringadesignearthquake.Theyieldingformedintheinterfacebetweenthedamandfoundationdoesnotreachthegroutingcurtainthatwouldremaininanelasticstateafteranearthquake.Theyieldingzonesoccurringontheupperportionofthedamfacesextend1/8thicknessofblocksectionintothedambodyandthuscantileverblocksneednotbeconcernedwithslidingstability.Thefaultsandinterlayershearweaknesszonesinthenearfieldfoundationexhibitsevereyielding,andapotentialslidingsurfaceispenetrated.Althoughthefactorofsafetyagainstslidingofthesurfacefluctuateswithadecreasedtrendduringanearthquake,theminimuminstantaneousvaluereaches1.02andisstilllargerthan1.0.Therefore,aconclusionisdrawnthattheBaihetanarchdam-foundationsystemwillremainstableunderthedesignearthquake.

简介：Previousstudiesathomeandabroadhavemainlyfocusedonsingledam-break,andlittleattentionhasbeenpaidsofartothedam-breakofcascadereservoirs.Multi-sourceflooding,whichcanleadtothree-dimensionalturbulentphenomenaandsuperpositioneffects,isthemaindifferencebetweenthedam-breakofcascadeandsinglereservoirs.Detaileddescriptionsofthecouplednumericalsimulationofmulti-sourcefloodinghavelittlebeenreported,andtheinitialwetriverbedisrarelyconsideredincurrentmodels.Therefore,inthispaper,amethodbasedonthethree-dimensionalk_eturbulencemodelcoupledwiththevolume-of-fluidmethodisproposedtosimulatethedam-breakfloodingofcascadereservoirs.Theupstreamriver,reservoir,anddownstreamriverareconnectedbytheinternalboundarymethod,andtheinitialconditions,includingriverflowandreservoirwater,aredeterminedaccordingtotheresultsofthenumericalsimulation.Couplednumericalsimulationofdifferentdam-breakfloodingisthenachieved.Thepresentworksolvesthechallengespresentedbytheenhancementandsuperpositionofnaturalriverflow,upstreamflooding,anddownstreamflooding.Thispaperprovidesatheoreticalbasisforfuturestudiesonthedam-breakfloodroutingofcascadereservoirs.