简介：ItisshowninthispaperthatahyponormalweightedshiftofnormoneisunitarilyequivalenttoaToeplitzoperatorifandonlyifitsweights{an}0∞satisfy1-丨an丨2=（1-丨a0丨2）n+1n≥0.Inparticular,thisanswerstheAbrahamse’sProblem2.Asaconse-quence,the（surprising）answer,obtainedfirstbyC.C.Coweninanexplicitform,toHalmos’Question5isrecaptured.

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简介：“六一”的阳光为什么这样灿烂？“六一”的花朵为什么这样芬芳？“六一”的歌声为什么这样动听？“六一”的孩子为什么这样高兴？

简介：ThereseearchontherelationbetweenweightedshiftoperatorsonHilbertspacesandotherimportantclassofoperatorsattractedtheattentionofsomemathematicians.Forexample,therelationbetweenweightedshiftoperatorsandsubnormaloperatorshasbeenthoroughlystudiedbyJ.Stampfli,R.GellarandD.A.Herrero,etc.(seereference[1])Butthedecomposabilityofweightedshiftoperatorshasnotyetattractedenoughattentionuptonow.Wemadeinitialresearch

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简介：由一个基本证明，我们使用Conway和Dudziak的结果看那A是否是一个hyponormal操作符与光谱半径r(A)以便它的光谱是关上的磁盘{z:|z|r(A)}当时，A是反射的。用这结果，我们在移动操作员的reflexivity上给Bercovici，Foias，和Pearcy的结果的一个简单证明。另外，可颠倒的双边的加权的移动的每力量是反射的，这被显示出。

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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。

简介：FromJan.1993toMay1993,theauthorsinvestigated30kindsofpatientswithheadache,insomnia,stiffneck,spondylopathy,periarthri-tisofshoulderjoint,herpeszoster,stomachacheanddiarrheawhoreceivedEar-seed-plasterther-apy,andobservedthelocationoftheauricular

简介：Theestimationofclutterpolarizationissignificantinvirtualpolarizationfiltering.ThispaperproposesvariablestepsizeLeastMeanSquareerror(LMS)algorithmtoestimateclutterpo-larization.Theadaptiverecursivefunctionissetupbasedondoublepolarizationreceivingsignalmodel.Bychoosingdesiredresponsesignalproperly,thereceiveddataareestimated.TheresultofestimationisusedforNullPhase-ShiftinstantaneousPolarizationFilter(NPSPF)designandtarget’samplitudeandphasecompensation.Algorithm’strackingperformanceisdiscussedindetail.Thesimulationresultsareconsistentwiththeaboveanalysis,andthecluttersuppressioniseffective.

简介：Windows操作系统的出现，使鼠标成为电脑必备的输入设备，它将复杂的命令行输入方式，变得简单而轻松。但是鼠标也不是万能的，特别是在进行一些特定的操作时，使用快捷键更方便一点，以下就是和Shift有关的一些快捷键，合理的利用这些快捷键可以提高工作的效率。

简介：Thepresentpaperdealswiththeaveragecase,complexityoftheshift-invariantproblem.Themainaimistogiveanewproofoftheupperboundofaverageerroroffiniteelementmethod.OurmethodisbasedonthetechniquesproposedbyHeinrich(1990).WealsopointoutanessentialerrorregardingtheproofoftheupperboundinA.G.Werschulz(1991).

简介：Pitchisoneofthemostimportantauditoryperceptioncharacteristicsofsound;however,themechanismunderlyingthepitchperceptionofsoundisunclear.Althoughtheoreticalresearcheshavesuggestedthatperceptionofvirtualpitchisconnectedwithphysicsincochleaofinnerear,thereisnodirectexperimentalobservationofvirtualpitchprocessinginthecochlea.Bylaserinterferometry,weobserveshiftphenomenaofvirtualpitchinbasilarmembranevibrationofexsomatizedcochlea,whichisconsistentwithperceptualpitchshiftobservedinpsychoacousticexperiments.Thismeansthatthecomplexmechanicalvibrationofbasilarmembraneincochleaplaysanimportantroleinpitchinformationprocessingduringhearing.

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简介：Ananomalousisotopeeffectexistsinmanyheavyelementisotopesystems(e.g.,Sr,Gd,Zn,U).Thiseffectusedtobecalledthe‘‘odd–evenisotopeeffect’’becausetheoddmassnumberisotopesbehavedifferentlyfromtheevenmassnumberisotopes.Thismass-independentisotopefractionationdrivingforce,whichoriginatesfromthedifferenceintheground-stateelectronicenergiescausedbydifferencesinnuclearsizeandshape,iscurrentlydenotedasthenuclearfieldshifteffect(NFSE).ItisfoundthattheNFSEcandriveisotopefractionationofsomeheavyelements(e.g.,Hg,Tl,U)toanastonishingdegree,farmorethanthemagnitudecausedbytheconventionalmass-dependenteffect(MDE).Forlightelements,theMDEisthedominantfactorinisotopefractionation,whiletheNFSEisneglectable.Furthermore,theMDEandtheNFSEbothdecreaseastemperaturesincrease,thoughatdifferentrates.TheMDEdecreasesrapidlywithafactorof1/T2,whiletheNFSEdecreasesslowlywithafactorof1/T.Asaresult,evenathightemperatures,theNFSEisstillsignificantformanyheavyelementisotopesystems.Inthisreviewpaper,webeginwithanintroductionofthebasicconceptoftheNSFE,includingitshistoryandrecentprogress,andfollowwiththepotentialimplicationsoftheinclusionoftheNFSEintothekineticisotopefractionationeffect(KIE)andheavyisotopegeochronology.

简介：Combininglaw,computerscienceandfinaneeinunprecedentedways,＂smart＂contracthasthepotentialtoreshapeourunderstandingofcontractlaw.Basedonblockchaintechnology,a＂smart＂contractisacontractcapturedincode,whichautomaticallyperformstheobligationsthepartieshavecommittedtointheagreement.Byremovingtheneedfordirecthumaninvolvement,oncea＂smart＂contracthasbeendeployedontoatrustlesspublicledger（TPL）.

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简介：发行时间：2017.4.13拍卖行在夜晚发生了盗窃杀人事件,名叫马特（Matt）的数学系学生在放学兼职途中不幸被卷入了这起抢劫案,而他需要想尽办法来证明自己的清白。这款悬疑题材的游戏采用了全动态影像制作,画面角色由真人饰演,完整的实景拍摄。玩家根据剧情的发展,对游戏中的关键事件进行选择和判断,来左右剧情发展的方向。如果电影里的剧情能由观众来选择,真实感和代入感将增强,这是电影交互式游戏给玩家带来的沉浸式体验。