简介:ForChinesepowerenterprises,investingoverseasandactivelyseekinginternationalcooperationinenergyresourcesformutualbenefitaccordswithnotonlythedesiresofthemselvestobecomebiggerandstronger,butalsoChina'senergystrategy.Havingwonthefirstoverseasstate-levelpower-gridoperationright,theStateGridCorporationofChina(SGCC)tooktheleadincarryingoutthestrategyof"goingout."
简介:Developmentanduseofnuclearenergywasundoubtedlyoneothegreatestaccomplishmentsbymankindinscienceandtechnologyduringthe20thCentury.Oncediscovered,atomicenergy,likeothertechnologicaldiscoveries,hasbroughtaboutmixedresults:byitsmilitaryapplication,manproduceddeadlynucleararsenals;butatthesametimeitbecameamajorenergy
简介:MarkovianarrivalprocesseswereintroducedbyNeutsin1979(Neuts1979)andhavebeenusedextensivelyinthestochasticmodelingofqueueing,inventory,reliability,risk,andtelecommunicationssystems.Inthispaper,weintroduceaconstructiveapproachtodefinecontinuoustimeMarkovianarrivalprocesses.TheconstructionisbasedonPoissonprocesses,andissimpleandintuitive.SuchaconstructionmakesiteasytointerprettheparametersofMarkovianarrivalprocesses.Theconstructionalsomakesitpossibletoestablishrigorouslybasicequations,suchasKolmogorovdifferentialequations,forMarkovianarrivalprocesses,usingonlyelementarypropertiesofexponentialdistributionsandPoissonprocesses.Inaddition,theapproachcanbeusedtoconstructcontinuoustimeMarkovchainswithafinitenumberofstates
简介:一种技术把重叠频率时间分割称为multiplexing(OVFTDM))在这篇文章被建议。这种技术从Nyquist系统和频率时间部门multiplexing系统被导出。没有orthogonality,信号是什么时候,简洁地及时重叠了领域,,当没有orthogonality,信号简洁地在频率领域被重叠时,这种技术被称为重叠时间部门multiplexing(OVTDM),这种技术被称为重叠频率部门multiplexing(OVFDM)。进一步改善光谱效率,在哪个发信号的OVFTDM在频率领域两个都被重叠,及时,域被探索。OVFTDM不取决于无论什么的orthogonality及时域或在象Nyquist系统或OFDM系统一样的频率领域,但是在在信号之中的convolutional限制关系上。因此,不是仅仅光谱效率而且可靠性被改进。模拟验证这个理论的有效性。
简介:Ishallneverforgetoneshowingwhichwasreallyachallenge.Iwasbusygettingreadyto(?)mywinterfashions.Then--just13(?)beforetheshowing—thesewinggirlswerecalledouton(?).Ifoundmyselfleftwithone(?)andthewomanwhowasinchargeofthesewingroom!Ⅰwasas(?)asmymodelsandsalesgirls.'We'llnever(?)it,'oneofthemcried.Here,Ithought,isthetestofalltestsforFather's(?).Whereistheway(?)thistime?Iwonderedandworried.Iwascertainwewould(?)tocallofftheshowing--(?)elseshowtheclothesunfinished.Thenitdawnedonme.
简介:有弹性的移植被采用multicomponent处理地震数据的向量广泛地付了注意。光线基于的有弹性的Kirchhoff移植有象高灵活性和高效率的如此的性质。然而,它没能解决multipath引起的许多问题。在另一方面,有弹性的反向时间的移植(请读使用手册)基于双向波浪方程被知道能够处理这些问题,但是当在3D情况和速度模型大楼中适用时,它是极其昂贵的。基于有弹性的Kirchhoff-Helmholtz积分,我们计算decoupled由介绍有弹性的格林的向后继续的wavefields为P-waves,和S波浪工作,它被elastodynamicGaussian横梁的求和表示。PP和改正极性的PS图象被计算关联在之间获得向下并且decoupled向后继续的向量wavefields,在极性修正被分析在极化之间的关系执行的地方,变换PS的方向飘动并且接口上的事件角度。到大程度,我们的方法把基于光线的移植的高效率与波浪方程的高精确性相结合基于的反向时间的移植。到从差错模型和Marmousi2的合成数据集建模的multicomponent的这个方法的申请表明新方法的有效性,灵活性和精确性。
简介:Thispaperpresentsanoveltimedelayestimation(TDE)methodusingtheconceptofentropy.Therelativedelayisestimatedbyminimizingtheestimatedjointentropyofmultiplesensoroutputsignals.Whenestimatingtheentropy,theinformationaboutthepriordistributionofthesourcesignalisnotrequired.Instead,theParzenwindowestimatorisemployedtoestimatethedensityfunctionofthesourcesignalfrommultiplesensoroutputsignals.Meanwhile,basedontheParzenwindowestimator,theRenyi’squadraticentropy(RQE)isincorporatedtoeffectivelyandefficientlyestimatethehigh-dimensionaljointentropyofthemultichanneloutputs.Furthermore,amodifiedformofthejointentropyforembeddinginformationaboutreverberation(multipathreflections)forspeechsignalsisintroducedtoenhancetheestimator’srobustnessagainstreverberation.
简介:PuLsetransittime(FIT)isusedasanoninvasiveandcull-lessparametertoestimatebloodpressure.Inthispaper,wedevelopanalgorithmtoobtainFTTrapidly,whichisappropriateformicro-processorandcouldachievegoodaccuracyinPTT,eveninnoisymeasurements.Thealgorithmisbasedonfiniteimpulseresponse(FIR)filtertoreducethenoiseandanadaptivethresholdtodetectthesignificantpointsofECGandPPG.EvaluationofthismethodisbasedonthesignalsfromourPTr-basedbloodpressuredevices.ItisshownthatthemethodworkswellforPPTcalculation.
简介:TwomethodsforsmoothingpseudorangeobservablebyCarrierandDopplerarediscussed.ThentheprocedurebasedontheRINEXobservationfilesistestedusingtheAshtechZ-XII3TgeodeticreceiversdrivenbyastableexternalfrequencyatUNSO.Thispaperproposestoadaptthisprocedureforthelinksbetweengeodeticreceivers,inordertotakeadvantageofthePcodesavailableonL1andL2.Thisnewprocedureusesthe30-secondRINEXobservationsfiles,thestandardoftheInternationalGPSService(IGS),andprocessestheionosphere-freecombinationofthecodesP1andP2;thesatellitepositionsarededucedfromtheIGSrapidorbits,availableaftertwodays.
简介:肌肉损害在运动仍然是最普通的损害之一,还尽管有这,几乎没有怎么有效地描述或决定特定的肌肉损害的预后到也上的很少一致。肌肉分类的众多的途径并且药分级在最后世纪被使用了,但是在最后十年,历史性的途径的限制被认出了。作为后果,在过去的10年里,临床的研究组开始询问了历史性的途径并且重新考虑肌肉损害被分类并且描述的方法。用一条记事途径,这张手稿描述几次最近的尝试分类并且分级肌肉损害并且加亮每个系统的相对力量和软弱。当时每新分类和分级的系统有力量,几乎在那里不在全面的一个系统和基于的证据上仍然是很少一致。很少在分级的系统以内的当前识别的特征有关联到精确地决定预后。