简介：Amethodbasedupontheweightedtotalcrosssection(WTCS)theoryisproposedtocalculatethephoto-ionisationcrosssectionsandtheradiativerecombinationratecoefficientsbetweenthefundamentallevelofCOandthemainelectronicstatesofitscorrespondingion.Totalphoto-ionisationcrosssectionsandradiativerecombinationratecoefficientsaredeterminedfromthecalculationofelementaryvibrationalphoto-ionisationcrosssections.TransitionsbetweenCO~+(X,AandB)andCO(X)areconsidered.Totalphoto-ionisationcrosssectionsandrecombinationcoefficientsarecomputedinthetemperatureinterval500-15000K.

简介：EpsonStylusPhotoR3000使用9色“世纪虹彩K3VM”颜料墨水系统，能够给我们呈现出更宽的色域和准确色彩：重要的是，

简介：Thedeterminationofstructuraldynamicstressspectrumdistributionisofgreatsignificanceinthestructuralfatiguestrengthevaluationaswellasreliabilitydesign.Inpreviousempiricaldataprocessingmethods,thedatagroupinganddistributionfittingwereexcessivelycoarseandcontaineddistinctivedefects.Thispaperproposedaneffectiveapproachtostatisticallygroupactualmeasureddynamicstressdataandvalidlyextrapolatethecombineddistributiontofitthedynamicstressspectrumdistribution.Thisapproachhasbeenverifieditseffectivenessthroughchi-squaretest,stressspectrumextrapolationanddamagecalculationindynamicstressstudy.

简介：联网的控制系统服从于影响他们的网络拓扑学的对手条件。保证可靠系统操作，网络拓扑学需要在全面系统性能上为他们的影响被描绘并且设法。这份报纸为这追求介绍网络坚韧性深度的概念。分离事件系统被用作一个基础为网络拓扑学的动态行为建模，支持他们的分析，并且执行他们的管理。随机的分析联系连接可靠性可能性到网络坚韧性深度的概率的描述。几拓扑学管理策略被讨论，包括被动方法，随机的策略，和优化方法论。他们的各自的好处和限制被确定。由把排控制用作混血儿(连续、分离的事件)的一个平台是的系统和包檫除隧道一个通讯协议，结果与案例研究被表明。

简介：

简介：Theprogressofperformancedynamicevaluationtheoryformutualfundfromdifferentpointsissummarized.Thetheoriesincludeconditionalperformanceevaluationmodel,stochasticdiscountfactorsmodel,dynamicselectingandtimingability,portfoliochangemeasureandsoon.Meanwhile,thispaperalsosummarizedtheprogressofPerformancePersistenceandSurvlvorshlpBias.Thentheanalysisofthedevelopmenttendencyfortheperformanceevaluationofportfolioismade.

简介：Toestablishanefficientinter-satellitelink(ISL)inanLEOnetwork,theeffectofgeometriccharacteristicsofISLontheISLsandthedevicesontheLEOsatelliteshouldbeexamined.BecauseofthecontinuousmovementoftheLEOsatellite,thetime-varyingbehavioursoftheISL'sgeometriccharactersisticscontinuouslychangewiththechangesofthesatellite'spositionontheorbit.ThesedynamicgeometriccharacteristicsoftheISLsareimportantforISL'sperformanceanalyzingandthedesignofthedevicesontheLEOsatellite.ThispaperdescribesdynamicgeometriccharacteristicsofISL,analyzestheimpactoftheseregulationsonthetrackingsystemofthesatellite'santennaandthepoweradjustingsystemofthesatellite'stransmitter,withtheIridiumsystemasanexample.

简介：Tohaveaclearerpictureofmechanismsresponsibleforthedeviationoftropicalcyclone(tobesimplifiedasTChereafter)tracks,thecurrentworkassumestheTCasacircularvortexwitharadiusofR.AgeneralmotionequationofTCisthendeterminedbyaveragingitshorizontalmotionequationoverthesentireregionofTC.Inthemeantime,withthemovingtrackofTCassumedasacharacteristicarc,thecurvatureequationisderivedforthetrackofmovementandpatternsofitsdeviationduetoTCstructureandvariationarediscussed.Theresultshowsthatthescale,size,maximumwindspeedandradiusarefactorscausingthedeviationofTCtracks.Inaddition,asymmetricstructureofTCisalsoimportantforthedeviationoftracks.Theresults,achievedwithhypothesis,agreewithfactsinsomecasesbutdisagreewiththeminothers,whicharetobeverifiedwithmoreobservationsornumericalsimulations.

简介：Nonlineardynamicresponseofnanomechanicalresonatorisofveryimportantcharacteristicsinitsapplication.Twocategoriesofthetension-dominantandcurvature-dominantnonlinearitiesareanalyzed.Thedynamicnonlinearityoffourbeamstructuresofnanomechanicalresonatorisquantitativelystudiedviaadimensionalanalysisapproach.Thedimensionalanalysisshowsthatforthenanomechanicalresonatoroftension-dominantnonlinearity,itsdynamicnonlinearitydecreasesmonotonicallywithincreasingaxialloadingandincreasesmonotonicallywiththeincreasingaspectratiooflengthtothickness;thedynamicnonlinearitycanonlyresultinthehardeningeffects.However,forthenanomechanicalresonatorofthecurvature-dominantnonlinearity,itsdynamicnonlinearityisonlydependentonaxialloading.Comparedwiththetension-dominantnonlinearity,thecurvature-dominantnonlinearityincreasesmonotonicallywithincreasingaxialloading;itsdynamicnonlinearitycanresultinbothhardeningandsofteningeffects.Theanalysisonthedynamicnonlinearitycanbeveryhelpfultothetuningapplicationofthenanomechanicalresonator.

简介：Pertainingtodynamicsystemsingeneral,areviewisgivenofrelationsbetweenmathematicaldescriptionsinthefrequencydomainortimedomainandstate-spacedescriptions.Fortheanalysisofhydrodynamicproblemsinoceanengineeringwaveforcesmayberepresentedbyconvolutionintegrals.Thepaperpresentsamethodtoconstructafinite-orderstate-spacemodelwhichrepresentsagoodapproximationtosuchaconvolutionintegral.Themethodutilizesaparticularalgorithmtocomputethepartialderivativeoftheexponentialfunctionofa(state-space)matrixwithrespecttothematrixelements.Themethodisappliedtoanexampleoffittingastatespacemodeloforderfivetothefreeoscillationscorrespondingtowaveradiationinatransientexperimentwithanoscillatingwatercolumn.

简介：

简介：Withtherapiddevelopmentofindustrializationandurbanization,thesizeofthemigrantpopulationinChinahasbeenexpanding.Duringthe12thFive-yearPlanperiod,averageannualgrowthofmigrantpopulationwas5.2million,whichhasreached247millionbytheendof2015.The18thCommunistPartyCongressexplicitlyrequiredanorderlytransitionofmigrantruralpopulation

简介：RillerosionisadominantprocessofmorphologicalevolutionoftheLoessPlateauinChina,anddeliveriesmuchloesssedimenttorivers.Datafromtwoflumeexperimentsconductedonthebareandglass-coveredbedsindicatedthatthefillflowdevelopsintoaseriesofrollingwaves.Theshearstressontherillbeddistributesunevenlybothspatiallyandtemporally.Anewmethodbasedontheenergyconservationlawisproposedinthisstudy.Thustherelationshipbetweentherunoffenergyconsumptionfromtheinteractionofwaterflowandslopebedandsoildetachmentisformulated.Theresultsshowedthatthedataforthesoildetachmentrateonslope(Dr)andtheenergyconsumptionofrunoff(E1)fittedwellwithnewly-developedfunction.Therillerosionoccurswhentherunoffenergyconsumptionexceedsacriticalvalue.

简介：Thepurposeofthisworkistoinvestigatethedynamicfracturepropertiesofglassypolycarbonate(PC)withdiferentagingtimes.Theopticalmethodofcausticsisadoptedinwhichtheshadowspotpatternsarerecordedbyahighspeedcameraduringthedynamicfractureprocess.Then,thedynamiccrackpropagation,thestressintensityfactor(SIF)andthedynamicfracturetoughnessofagedPCareobtainedthroughananalysisofthecharacteristicsizeofcausticpattern.Moreover,bycombiningwiththeinvestigationofthefracturesurfaceandtheenergyreleaserateanalysis,theinfluenceofagingtimeonthedynamicfracturebehaviorisdiscussed.ResultsshowthatthedynamicfracturetoughnessandcriticalenergyreleaserateofPCdecreaseswithagingtimeforshortagingtimes,whereastheyhavelittlechangeorevenincreaseforlongeragingtimes.Therefore,agingmodifiesthemechanicalpropertiesespeciallythedynamicfracturepropertiesofPCnonlinearly,notlinearlyasgenerallythoughtof.

简介：

简介：ThemodelingmethodologiesandcalculationofdynamicresponseofundergroundstructureunderRayleighwavesisinvestigatedinthispaper.FirstthefreefieldresponsesunderRayleighwavesareanalyzedandthenumericalresultsagreewellwiththetheoreticalresults.Then,theapproximateRayleighwavesareputforwardbasedonthepreliminaryre-search,andRayleighwavefieldisobtainedthroughfastFouriertransformtechnique.Takingautilitytunnelasanexample,itsdynamicresponsesunderRayleighwavesiscalculatedbyABAQUS.Theresultsdemonstratethatbendingdeformationisthemaincomponentofstructuraldeformationandthedeformationatthetopofthestructureisabouttwiceasmuchasthatatbottomofthestructure.Theeffectofsoil-structureinterfaceandtheburieddepthofundergroundstructurearealsoinvesti-gatedviaparameteranalysis.Fortheshallowburiedundergroundstructures,Rayleighwavescanbethekeyfactortocontroltheresponsesanddamageofthestructure.

简介：为有动态无常的非线性的系统的一个类，柔韧的适应稳定问题在这篇论文被考虑。由介绍一个观察员，第一，一个扩充系统被获得。基于系统，我们构造exp-ISpSLyapunov为unmodeled动力学工作，证明unmodeled动力学是exp-ISpS，然后获得一个动态使动态骚乱正常化信号抵抗。由backstepping技术，一个适应控制器被给，在适应控制系统的所有信号最终一致地全球性被围住，这被证明，并且输出能被调整到有任何规定精确性的起源。一个模拟例子进一步表明控制计划的效率。关键词Unmodeled动力学-Exp-ISpS-动态使中国(号码60304003)和节目的国家自然科学基础正常化信号-Backstepping-适应控制这个工作被在大学里为新世纪优秀才能支持(没有。NCET-05-0607)。苏海霞在2003在Qufu师范大学从数学的部门收到了她的学士学位。当前，她在一样的大学的自动化的研究所正在追求她的硕士学位。她的研究兴趣是非线性的适应控制。谢学军从系统科学的研究所收到了他的博士学位，在1999的中国科学院。他当前是在在Qufu师范大学的自动化的研究所的一个教授。他的研究兴趣为复杂系统包括适应控制。刘海宽在1991点从哈尔滨工学院收到了他的学士学位。他是在Xuzhou师范大学的一个教授。他的研究兴趣包括柔韧的控制，电源来源技术，和计算机有申请的综合系统。

简介：ＣＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＳｕｒｇｅｒｙ，ＤａｐｉｎｇＨｏｓｐｉｔａｌ，ＴｈｉｒｄＭｉｌｉｔａｒｙＭｅｄｉｃａｌＵｎｉｖｅｒｓｉｔｙ，Ｃｈｏｎｇｑｉｎｇ４０００４２，Ｃｈｉｎａ（ＬｉｕＢＳ，ＷａｎｇＺＧ，ＷｅｎｇＧＷ，ＹａｎｇＺＨ，Ｌ...

简介：

简介：Storageandretrievalofmultimediaobjectshasbecomearequirementformanycontemporarysystems．Forexample，givenanimagedatabase，onemaywanttoretrieveallimagesthataresimilartoaqueryimage．Asmanycontent-basedretrievaltechniquesfordigitalimageryuseafeaturevectorapproachtorepresentimagecontents，itisdesirabletoreducethedimensionalityofthedata，whilstmaintainingasmuchofitsoriginalstructure．Severaldimensionalityreductiontechniquesareavailable．ThemostpopularoneisPCA，whichworkswellforstaticdatabases．Inthispaper，wepresentanovelschemeforperformingPCA-baseddimensionalityreductionindynamicdatabases．Insteadofusingtheentiredataset，weonlyrecomputethePCAtransformmatrixontheupdatingdataset．Notethatthesizeoftheupdatingdatasetisusuallymuchsmallerthanthatoftheentiredata，thistechniquemayreducethePCAcomputationtimecomplexitywithoutlosingexactness．Inaddition，theupdatestothedatabasearebasedontheexistingdimensionality-reduceddatavectorsratherthantheoriginalhigh-dimensionaldatavectors，whichmayrelievethesystemoverheadforthemanagementoftheoriginalhigh-dimensionaldata．