简介：OnDecember25,2000,thelastgeneratingunitinTianshengqiaoIHydropowerStationcompleted72hoursoftrialoperationinparallelwithpowernetwork.UPtothisday,thegeneratingunitsinthisstationhadbeencompletelybuiltupandputintooperation.ThetotalinstalledcapacityofTianshengqia

简介：Inthispaper,theauthoratfirstdevelopsamethodtostudyconvergenceofthecascadealgorithminaBanachspacewithoutstableassumptionontheinitial(seeTheorem2.1),andthenappliesthepreviousresultontheconvergencetocharacterizingcompactlysupportedrefinabledistributionsinfractionalSobolevspacesandHoldercontinuousspaces(seeTheorems3.1,3.3,and3.4).Finallytheauthorappliestheabovecharacterizationtochoosingappropriateinitialtoguaranteetheconvergenceofthecascadealgorithm(seeTheorem4.2).

简介：Anexperimetalinvestigationwascarriedoutontheeffectofbladechordwiseleanonthelosseinhighlyloadedrectangularturbinecascades,Datailedmeasurementsinclude10traversesfromupstreamtodownstreamofthecascadeswithfive-holesphericalprobes.ComparedwiththeexperimentaldataofthecoventionalStraightandpitchwiseleanbladesunderthesameconditions,itisshownthattheeffectofchordwiseleanonthedevelopmentofthecascadelossesissimilartothatofpitchwiselean.However,thechordwiseleanproducessmallerstreamwiseadversepressuregradientsnearbothendwallsandasmallerspanwisenegativeonestartingfromtheactuteanglesideinthefirstpartofthepassagesinchordwiseleancascade,therebythesaddlepointseparationsandintensitiesofthepassagevorticesareweakenedandthesecondaryvortelossesarecutdownnotably.

简介：当前的纸论述试验性、计算的结果在一台压缩机估计non-axisymmetricendwallcontouring的有效性线性串联。endwall被一个endwall设计优化平台在0o发生(设计条件)设计。优化方法基于一个基因算法。设计目的是最小化全部的压力损失。实验与0.15的一个马赫数字在一台低速度的测试设备在压缩机串联被执行。四个名字的入口流动角度被选择测试non-axisymmetricContouredEndwall(CEW)的表演。有2公里的一条头直径的一根五洞的压力探针被用来穿越flat-endwall(很少)的下游的流动地，CEW串联。两个都，测量并且预言的结果显示CEW的实现导致全部的压力损失的更小的角落货摊，和减小。CEW得到15.6%全部的压力损失系数减小在设计状况，并且22.6%在离开设计调节+7o发生)。并且CEW的改进的机制基于测量了并且计算结果是不利压力坡度(APG)在吸表面(SS)的前缘(LE)附近通过沟配置被减少了。

简介：Thepaperpresentstheformulationtocomputenumericallytheunsteadyaerodynamicforcesonthevibratingannularcascadeblades.Theformulationisbasedonthefinitevolumemethod.ByapplyingtheTVDschemetothelinearunsteadycalculations,theprecisecalculationofthepeakofunsteadyaerodynamicforcesattheshockwavelocationlikethedeltafunctionsingularitybecomespossiblewithoutempiricalconstants.Asafurtherfeatureofthepresentpaper,resultsofthepresentnumericalcalculationarecomparedwiththoseofthedoublelinearizationtheory(DLT),whichassumessmallunsteadyandsteadydisturbancesbuttheunsteadydisturbancesaremuchsmallerthanthesteadydisturbances.SinceDLTrequiresfarlesscomputationalresourcesthanthepresentnumericalcalculation,thevalidationofDLTisquiteimportantfromtheengineeringpointofview.Undertheconditionsofsmallsteadydisturbances,agoodagreementbetweenthesetworesultsisobserved,sothatthetwocodesarecross-validated.ThecomparisonalsorevealsthelimitationontheapplicabilityofDLT.

简介：Inthispaper,anewresult,newformulasoftransferfunctionandinputimpedancefor2-Ddissipativereactancenetworkcascadesynthesisisgivenintermsofsimplifiedformulastorealizedoublyterminatedresistively1-Ddissipativereactancenetworks.Thenewresultincludesthemoregeneralcases,e.g.thebothcanbedissipativeoroneisdissipativeandtheanotherisalosslessreactancesubnetworkandsoon.Twocalculationexamplesaregiveninthepapertoillustratetheaboverealizations.Besides,consideringsomeproblemsofthedirectconnectionbetweentwosubnetworks,wealsointroduceone-waylinestodiscussthecascadesynthesisofnonreciprocal2-Ddissipativereactancenetworks.

简介：Aninvestigationofthepassivecontrolofshockwave/boundarylayerinteractionforreducingtheamplitudeoftheshockoscillationwasconductedonthecirculararc-wedge(CW)profilecascadeina220^290mmtransoniccompressorcascadewindtunnel.Aperforatedsurfacewithacavitybeneathitwaspositionedonthesuctionsurfaceofthebladeatthelocationofshockimpingement.TheSchlierenandhigh-speedphotographsforflowoverpervoratedbladearepresentedandcomparedwiththeresultsforsolidblades,Withtheperforatedsurface,thehigh-speenphotographsindicatedansignificantsuppressionofshockosciation.

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.

简介：Followingthestartuporanecologicalprotectionprojectof“substitutingSHP(smallhydropower)forfuel”,anewroundofSHPconstructionisgoingtoreachitsclimax.Chinahasnumerousrivers,andstatisticsshowstherearemorethan50,000eachwithadrainageareaofover100km^2,amongthemonly1,580riverseach

简介：Thispaperpresentsauniquenoveldesignofthephase-shiftedcascadehighvoltageinverter.Thehighvoltageinverterutilizesfewerpowerswitchesandsuppliesabalanceload.TheusageofphaseshifttransformerandphaseshiftingSPWMensuresthatinputandoutputharmonicwavecontentislowandoutputvoltagechange(du/dt)hasalowrate,meetingalltherequirementsofthepowerauthorities.Themostout-standingfeatureistheenergysavingwithveryfastcostrecovery.

简介：基于DCA机翼的一个原型和10%弦的轴的排水量重叠，七种正切的排水量被拿与数字方法在双人脚踏车串联模仿流动条件与高效选择更好的几何学。有正切的排水量b/t=0.83的配置将比其它获得更好的流动性能。在这个基础上，有正切的排水量b/t=0.67的二种配置并且0.83在几种配置之中被选择由使用TR-PIV系统即刻地捕获流动速度拿进试验性的调查。有b/t=0.83的配置被观察更好的流动地表演比b/t=0.67。它在差距地区的注射流动强壮得多，弄醒前面的地区区域并且高耸片更小，溪流流动是改进的更多。它证明在试验性的调查的流动表演相当在数字结果预言的一样的趋势。

简介：根据低固态通报串联上的以前的试验性的工作更弥漫(迷幻药)，离心的blower的压力恢复被迷幻药处于大量流动率显著地改进，并且压力恢复被LSD与单个排的串联与LSD比较与双人脚踏车串联进一步改进。在现在的学习，在有双人脚踏车串联的LSD的流动行为被使用ANSYS-CFX12的商业CFD代码数字地分析了。更高的压力恢复被与双人脚踏车串联使用LSD完成，这清楚地被显示出，并且高压力恢复在LSD和LSD的前面片装载的高片在上游的无翼的空间基于高压力上升。在LSD的高压力恢复能被由于有利第二等的流动的形成并且由于通过在前面和尾部之间的裂缝节的集体流动的增加在后面的片的上在前面片并且也的吸表面上控制流动分离完成片。

简介：一个简单方法被建议为一个系列串联控制系统设计P/PI控制器为不稳定首先订正时间延期(FOPTD)系统。在这份报纸，为与稳定/不稳定的FOPTD系统在系列串联的不稳定的FOPTD系统的控制器设计被考虑。建议方法基于等同s和s的相应力量的系数2为一个伺服问题在靠近环的转移的分母的到乘那些的1和2的分子工作。开的环系统由与一个稳定/不稳定的FOPTD系统在系列串联的一个不稳定的FOPTD系统组成。仅仅二调节参数(1和2)为控制器的设计被要求。靠近环的表演为伺服和规章的问题被评估，表演被发现比很好确定的合成方法的好。为在模型参数的无常的坚韧性被学习并且由合成方法与控制器的相比设计了。

简介：Anoveldistributedmodelpredictivecontrolschemebasedondynamicintegratedsystemoptimizationandparameterestimation(DISOPE)wasproposedfornonlinearcascadesystemsundernetworkenvironment.Underthedistributedcontrolstructure,onlineoptimizationofthecascadesystemwascomposedofseveralcascadedagentsthatcancooperateandexchangeinformationvianetworkcommunication.Byiteratingonmodifieddistributedlinearoptimalcontrolproblemsonthebasisofestimatingparametersateveryiterationthecorrectoptimalcontrolactionofthenonlinearmodelpredictivecontrolproblemofthecascadesystemcouldbeobtained,assumingthatthealgorithmwasconvergent.Thisapproachavoidssolvingthecomplexnonlinearoptimizationproblemandsignificantlyreducesthecomputationalburden.Thesimulationresultsofthefossilfuelpowerunitareillustratedtoverifytheeffectivenessandpracticabilityoftheproposedalgorithm.

简介：Inamedium-termelectricitymarket,inordertoreducetherisksofpriceandinflowuncertainties,thecascadehydropowerstationsmayusetheoptionscontractwithelectricitysupplycompanies.Aprofit-basedmodelforriskmanagementofcascadehydropowerstationsinthemedium-termelectricitymarketispresented.Theobjectivefunctionisprofitmaximizationofcascadehydropowerstations.Inordertoavoidtherisksofpriceandinflowuncertainties,twodifferentrisk-aversionconstraints:aminimum...

简介：Bymeansofinktracevisualizationandtopologicalanalysis,thispaperinvestigatesthetopologicalstructureoftheflowpatternsurrondingbothendwallsandbladesurfacesforalowaspectratiolinearrotorcascadewithtipclearance.Thestructureoftheflowpatternshowsthatmostofthesingularpointandseparationlinesarelocatedintheupperhalfspanregionofthetestedcascadewheretheaerodynamicbehaviorsaredeteriorated.

简介：为了在压缩机的流动地上探索机翼探查试管和它的款项位置的效果，串联，并且发现机制怎么机翼探查影响压缩机串联的空气动力学的特征，这份报纸在一样的压缩机串联上执行了数字、试验性的工作。实验主要集中了于低马赫数字的案例(妈=0.1)，并且有不同马赫数字的案例(0.1，0.3，0.7)并且不同发生角度(-5,0，5)被数字方法调查。没有机翼探查试管的案例作为基线，和另外的三个案例被引用，机翼探查试管在不同chordwise位置安装了(30%，50%，70%弦长度)被学习。机翼探查试管的直径是3mm，它根据几何类似原则作为某特别机翼探查的300%扩大被设置。结果证明机翼探查试管根本在串联的流动能力上有否定影响调查点。分离和在压力方面上由机翼探查试管导致了的大规模streamwise旋涡在高马赫数字引起大多数损失。在压力方面表面的附近的流动领域上的机翼探查试管的影响是在低马赫数字的本地分离。机翼探查试管也有一清楚地在漏流动上完成。它减少漏流动的集体流动并且削弱漏旋涡的紧张，但是扩大影响区域。试管在chordwise位置通常是的一半被安装的盒子的全部的压力损失特别在高马赫数字比另外的盒子降低，它能甚至减少损失与基本盒子相比。

简介：OnOctober12,2000therepresentativesfromallsidesformallysignedattheacceptancetestforimplementingcascade1hydropowerstationonWokaRiverinTibet,whichmarksthatthesecondlargestoneofChina'snational62assisting-Tibetprojectsisfullysucceeded.

简介：Amulti-wavelengthsampledBragggrating（SBG）quantumcascadelaserarrayoperatingbetween7.32and7.85μmisreported.Thesamplinggratingstructure,whichcanbeanalyzedasaconventionalgratingmultipliedbyasamplingfunction,isfabricatedbyholographicexposurecombinedwithopticalphotolithography.Thesamplinggratingperiodwasvariedfrom8to32lira,anddifferentsamplingorder（-1st,-2nd,and-3rdorder）modeswereachieved.Weproposethathigher-ordermodeswithoptimizeddutycyclescanbeusedtotakefulladvantageofthegaincurveandimprovethewavelengthcoverageoftheSBGarray,whichwillbebeneficialtomanyapplications.

简介：Themainobjectiveforthisresearchwastheanalyticalexplorationofthedynamicsofplanarsatelliterotationduringthemotionofanellipticalorbitaroundaplanet.First,werevisittheresultsofJ.Wisdometal.(1984),inwhich,bytheelegantchangeofvariables(consideringthetrueanomalyfastheindependentvariable),thegoverningequationofsatelliterotationtakestheformofanAbelordinarydifferentialequation(ODE)ofthesecondkind,asortofgeneralizationoftheRiccatiODE.WenotethatduetothespecialcharacterofsolutionsofaRiccati-typeODE,thereexiststhepossibilityofsuddenjumpinginthemagnitudeofthesolutionatsomemomentoftime.Inthephysicalsense,thisjumpingoftheRiccati-typesolutionsofthegoverningODEcouldbeassociatedwiththeeffectofsuddenacceleration/decelerationinthesatelliterotationaroundthechosenprincipleaxisatadefinitemomentofparametrictime.Thismeansthatthereexistsnotonlyachaoticsatelliterotationregime(aspertheresultsofJ.Wisdometal.(1984)),butakindofgradientcatastrophe(Arnold,1992)couldoccurduringthesatelliterotationprocess.Weespeciallynotethatifagradientcatastrophecouldoccur,thisdoesnotmeanthatitmustoccur:suchapossibilitydependsontheinitialconditions.Inaddition,weobtainedasymptoticalsolutionsthatmanifestaquasi-periodiccharacterevenwiththestrongsimplifyngassumptionse→0,p=1,whichreducethegoverningequationofJ.Wisdometal.(1984)toakindofBeletskii'sequation.