简介：<正>Neuralnetworkhastheabilitiesofself-studying,self-adapting,faulttoleranceandgeneralization.Buttherearesomedefaultsinitsbasicalgorithm,suchaslowconvergencespeed,localextremes,anduncertainnumberofimpliedlayerandimpliednotes.Thispaperpresentsasolutionforovercomingtheseshortagesfromtwoaspects.Oneistoadoptprinciplecomponentanalysistoselectstudysamplesandmakesomeofthemcontainsamplecharacteristicsasmanyaspossible,theotheristotrainthenetworkusingLevenberg-Marquardtbackwardpropagationalgorithm.Thisnewmethodwasprovedtobevalidandpracticableinsiteselectionofpracticalgarbagepowergenerationplants.

简介：Chinaneedstodevelopastrongnationalpowergridwhichtakesultra-high-voltage(UHV)transmissionsystemsasitscore.Thegridisexpectedtoadopt1000-kV-classACand±800-kVDCtransmissionsystems.InviewofsignificantachievementsintechnologicalresearchandconsiderableprogressinUHVmanufacturingtechnology,ChinaiscapableofdevelopingUHVsystems.InordertopromotetheconstructionofUHVsystems,ChinaElectricPowerResearchInstituteandotherinstitutionshaveinitiatedfirst-phaseresearchactivitiesofUHVtransmissiontechnologies.ThemaincontentsinvolveresearchonUHVtransmissiontechnologyanditseconomy,developingandmanufacturingabilitiesonUHVequipment,prospectiveofUHVnetworkframeandselectionofdemonstrationprojects,etc.

简介：Thispaperreviewsthedifferentchallengesthatareencounteredinthedeliveryofhighpowerlasersasdriversforfusionenergy.Wewillfocusondiode-pumpedsolid-statelasersandwewillhighlightsomeofthemainrecentachievementswhenusingytterbium,cryogeniccoolingandceramicgainmedia.Apartfromsomeexistingfusionfacilitiesandsomemilitaryapplicationsofdiode-pumpedsolid-statelasers,wewillshowthatdiode-pumpedsolid-statelasersarescalabletoinertialfusionenergy(IFE)’sfacilitylevelandthattheall-fiberlaserschemeisverypromising.

简介：

简介：WestatisticallyanalyzethetropicaltyphoonformingintheSouthChinaSeaanduseTC(TropicalCyclone)forshortinthefollowing)bytyphoonyearbook.Thetyphoonquantityisverydifferentindifferentmonthsandyears.TCappearsinallmonthsexceptMarch,andthemostTCquantityinayearis11,theleastis1and6.2onaverage.ThemostTCquantityinamonthis5andtheleastis0.TClandsmostinAugustandnoTClandsonChinesecontinentfromDecembertothefollowingApril.TheprimarylandingareaisbetweenShantouandHainanIsland.ThesustainingperiodofTCisusuallybetween4daysto7days,andthelongestis19days.Only15%oftheTCformingintheSouthChinaSeacanintensifytotyphoon,andtheyallformintheoceanareadeeperthan150m.TheSouthChinaSeaistheoceanareaoverwhichtheTCoccursfrequently.

简介：

简介：OnApril23rd,ChinaDatangCorporationandEdFofFranceheldasigningceremonyforajoint-venturecontractofDatangSanmenxiaPowerGenerationCompanyLtd.inHenanProvince.ThisisthefirstcooperationprojectbetweenDatangandEdF.TheDatangSanmenxiaPowerGenerationCompany

简介：在在它的失败以后的一个舷侧电源系统(SPS)的电的网络的可配置性对电源供应的恢复中央并且改进SPS的survivability。航行过程创造不同操作条件的一个序列。一些负担的优先级在改变操作条件不同。在分析典型SPS的特征以后，一个模型被开发使用一个等级III总机和一个环境权衡轻重代理人(EPA)算法。当它逻辑地并且身体上象多代理人一样被分散，这个算法被选择面向。EPA算法被用来决定动态负担优先级，然后，最好遇见最大的电源供应负担选择了工具。模拟结果证明更高的优先级负担是第一被恢复。系统满足了所有必要限制，表明建议方法的有效性和有效性。

简介：OnJanuary1,HuizhouPumped-StoragePowerProjectintheSouthernPowerGridwasstartedformally.ThisprojectisthelargestunderconstructioninChina.ItissituatedinthesuburbofBoluoCounty,HuizhouCity,GuangdongProvince,112kmdistantfromGuangzhouCity.

简介：

简介：

简介：使用JPG格式的图片文件,我们可以通过在幻灯片中插入图片来增加视觉效果,如果你的演示文稿中有几十幅较大的图片

简介：Analysisofthescatteringparameters(S-parameters)ofplanarN-waymetamaterialpowerdividers/combinersmostlyusescommercialmicrowavecircuitsimulatorsduetothelargecircuitsizeinvolved.Thispaperpresentsanefficientcircuitmodelingapproach,whichisbasedonthemulti-inputandmulti-outputtransmissionmatrix(T-matrix)method,toanalyzetheS-parameterofaplanarnine-waymetamaterialpower-divider/combinerstructure.S-parametercomputationresultsareshowningoodagreementwiththesimulationresultsbyusingtheAgilentadvanceddesignsystem(ADS)andmeasurementresults.ThecomputationtimeofanN-waymetamaterialpowerdivider/combinerwithN=5,9,13,and17usingT-matrixmethodisalsocomparedwiththoseofADSandAWRMicrowaveOffice(MWO)todemonstrateitscomputationalefficiency.

简介：

简介：

简介：

简介：Thispaperdescribesthealloydesignphilosophyfortheimprovementoflong-termcreepstrengthoftemperedmartensitic9Crsteel,includingweldedjoints.Thecreeplifetrisinverselyproportionaltotheminimumcreeprateεmintimestheincreaseincreepratebystraindlnε/dεintheaccelerationregionastr=1.5/[(εmin)（dlnε/dε）].Theparametersεminanddlnε/dεarecloselycorrelatedwiththetimetominimumcreepratetmandthestraintominimumcreeprateεm,whichcharacterizethecreepdeformationbehaviorinthetransientregion.Theboundaryandsub-boundaryhardeningisshowntobethemostimportantstrengtheningmechanismincreepof9Crsteelandisenhancedbyfinedispersionsofprecipitatesalongboundaries.TheadditionofboronreducesthecoarseningrateofM23C6carbidesalongboundariesnearprioraustenitegrainboundariesduringcreep.Theenhancementofboundaryandsub-boundaryhardeningincreasesthetmanddecreasestheεmin,whichimprovesthecreeplife.Theboundaryandsub-boundaryhardeningissignificantlyreducedinfine-grainedregionofheataffected-zone（HAZ）ofconventionalsteelP92weldedjoints,promotingTypeⅣfracture.InNIMS9Crboronsteelweldedjoints,thedistributionofcarbonitridesalongboundariesaresubstantiallythesamebetweentheHAZandbasemetal,suppressingtheTypeⅣfracture.

简介：Theexperimentalstudyofultra-wideband(UWB)technology,itsgenerationandon-linemeasurementarepresented.AnexperimentalrepetitiveUWBsystemisdesigned,manufactured,andtested.High-pressuresparkgapswitchanditscomponents,aswellasoilsparkgapswitcharestudiedexperimentallyonthesystem.Experimentalresultsindicatethatthesystemoperatesata200ppsrepetitiveratewithastableperformance.100MWpeakpowerUWBpulsesareobtainedonthesystem.Fast-timeresponsecapacitivedividerisdesignedandfabricated,allowingforanaccuratemeasurementofthehighpowerUWBsignal.ThemainissuesrelatedtothedesignoftheswitchandtheUWBsignalonlinemeasurementarediscussed.

简介：

简介：