简介:一只有裂缝的水罐为自己的缺陷而深感内疚,但它忽略了由它浇灌出的美丽花朵。人人都有属于自己的不足,只要正视它们,那么……AwaterbearerinIndiahadtwolargepots,eachhungoneachendofapole,whichhecarriedacrosshisneck.Oneofthepotshadacrack(裂缝)init,andwhiletheotherpotwasperfectandalwaysdeliveredafullportionofwaterattheendofthelongwalkfromthestreamtothemaster蒺shouse,thecrackedpotarrivedonlyhalffull.Fortwoyearsthiswentondaily,withthewaterbearerdeliveringoneandone鄄halfpotsfullofwatertohismaster...
简介:LOCATEDinGuizhouProvince,southwesternChina,QianxinanBouyei-MiaoAutonomousPrefectureisatouristdestination,duetoitsextraordinarynaturalenvironmentanddistinctiveethnic
简介:摘要 针对某型惯性导航系统稳定回路调试出现的惯性平台方位环谐振峰值超差故障,对惯性平台进行分析研究,找出影响谐振峰值超差的关键因素并制定措施,从而解决谐振峰值超差问题。
简介:Steppedfrequencysignalisoftenusedtosynthesizehigh-resolutionrangeprofile,butredundanthigh-resolutionrangeprofileexistsbeforesynthesis.Twomethodshavebeengiventoextracttargetfromoverlappedhigh-resolutionrangeprofileandanalyzedtoshowhowspuriouspeaksappear.Thispaperprovidesareverse-countalgorithmtoresolvetheproblemofspuriouspeaksformovingtarget.Thisproposedmethodselectsthepeakwithmaximumamplitudeastheextractedtargetandgetsitspositionbyusingthenumberofsamplesprcedingbeforethepresentsamplepositionandthenumberofhigh-resolutionrangecellofthetarget.Thisproposedmethodiscomparedwiththealreadygivenmethodandtheresultshowstheabilityoftheproposedmethodtoremovespuriouspeaks,itprovidesthefoundationforhigh-resolutionrangeprofile.
简介:In2005,Bao,etal.[Appl.Math.andComput.,vol.169,No.2,2005]showedthatTzeng,etal.’snonrepudiablethresholdmulti-proxymulti-signatureschemewithsharedverificationwasinsecure,andproposedanimprovedschemewithnoShareDistributionCenter(SDC).ThispapershowsthatBao,etal.’sschemesuffersfromtheproxyrelationshipinversionattackandforgeryattack,andpro-posesanimprovementofBao,etal.’sscheme.
简介:Beingoneofthemarketsmoststimulatingtoinvestors,theChinesepowermarkethasalreadyshownitsinvestmentopportunitiesthatnoinvestorcanignore.Butpresently,whetherexperiencedpowerenterprisesinmarketparticipationorgreenhandspreparedforrushingintothemarket,theywilldiscoverthatevenunderderegulationcondition,therearestillmanyinevitableandunsolvablenonmarketproblemsexistinginpowerinvestment.
简介:Thispaperproposesacircularthresholdquantumsecretsharing(TQSS)schemewithpolarizedsinglephotons.Apolarizedsinglephotonsequencerunscircularlyamonganytormoreofnpartiesandanytormoreofnpartiescanreconstructthesecretkeywhentheycollaborate.Itshowsthatentanglementisnotnecessaryforquantumsecretsharing.Moreover,thetheoreticefficiencyisimprovedtoapproach100%asthesinglephotonscarryingthesecretkeyaredeterministicallyforwardedamonganytormoreofnparties,andeachphotoncancarryonebitofinformationwithoutquantumstorage.Thisprotocolisfeasiblewithcurrenttechnology.
简介:Anewpolymer,polyzirconoxanesal(PZS),issynthesizedfromthereactionofzirconiumoxychlorideoctahydrate(ZrOCl2-8H2O)withacetylacetone(Hacac)andsalicylalcohol(SA)byone-potprotocol.Thepolymerissolubleincommonorganicsolvents,suchasethanol,methanol,acetone,tetrahydrofuranandchloroform,andexhibitsrheologywithviscosityof100-300mpasat25℃.Thesepropertiesaresuitableforusesinfabricationofceramicmatrixfibercomposites.Pyrolysisofthispolymerat1300℃inargonprovidesnanosizedZrCwithsphericalmorphologyandsizeof20-100nm.
简介:摘要:轮对故障动态检测系统在地铁场段设备中作为关键设备之一,有着重要作用,可对通过设备的电客列车轮对进行轮径、轮缘厚、踏面缺陷、不圆度等数据测量,并及时提出报警。
简介:Experimentaldata,obtainedfrompreviousstudies,onCriticalTractiveStress(CTS)ofnon-uniformsediments,havebeenusedtoverifytheadequacyofexistingrelationshipsforCTSofnon-uniformbimodalsediments.Keepinginviewtheperformanceofsuchrelationships,anewrelationshipforcomputationofdimensionlessCTSofindividualsizefractionofnon-uniformunimodalandbimodalsedimentshasbeenproposedintheformofpowerlaw.Thecoefficientandexponentoftheproposedpowerlawhavebeenempiricallycorrelatedwithsedimentcharacteristicsforavailablesedimentdata.Theproposedrelationshiphasbeenvalidatedwithindependentflumeandfielddatatoassesstheirapplicabilityforunimodalandbimodalsediments.