学科分类
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6 个结果
  • 简介:Considera-mixingsequenceofidenticallydistributedrandomvariableswiththeunderlyingdistributioninthedomainofattractionofthenormaldistribution.Thispaperprovesthatlawoftheiteratedlogarithmholdsfor-mixingsequencesofrandomvariables.OurresultsgeneralizeandimproveTheorems1.2-1.3ofQiandCheng(1996)fromthei.i.d.caseto-mixingsequences.

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  • 简介:Background:Novelplayertrackingtechnologiescanchangetheunderstandingofperformancedeterminantsinteamsportsbyallowingtoaccuratelymeasuringtheactivitydemands.Theaimofthisstudywastoidentifyhowthedefensivepressureaffectsthetime-motionvariablesandthetechnicalactionsinbasketball.Methods:Twentyinternationalmaleplayers(age:16.05±2.09years,weight:73.13±8.10kg,height:183.10±5.88cm)playedtwo10minbasketballquarters,wheretheyusedaman-to-man1/4-courtdefenseuntilthe4thmin(F1/4),changedtoman-to-manfullcourt(FULL)for3minand,fromthe7thtothe10thminreturnedto1/4-courtdefense(S1/4).AcomputerizednotationalanalysiswasperformedusingSimiScoutandpositionaldatawerecapturedwiththeUbisenseRealTimeLocationSystem(meansamplingrate3.74±0.45Hzpertransmitter/player).Results:Thetime-motionvariablespresentedsimilarresultsbetweendefensiveconditions,showingatotaldistancecoveredaround90m/min.However,resultssuggestedpossibleverticaljumpimpairmentsinS1/4periods.Therewasmoredistancecoveredwhilejoggingintheoffensivecourt(38.15±12.17m/minoffensivecourtvs.32.94±10.84m/mindefensivecourt,p<0.05)andmoredistancecoveredwhilerunninginthedefensivecourt(16.41±10.27m/minoffensivecourtvs.19.56±10.29m/mindefensivecourt,p<0.05).Conclusion:Theseresultssuggesthowtoimprovetaskrepresentativenessduringspecificconditioningorgame-basedtrainingsituationsandalsotohelpcoaches’strategicdecisionsduringthegames.

  • 标签: Activity DEMANDS PERFORMANCE analysis PERFORMANCE indicators
  • 简介:Inthispaper,anexponentialinequalityforthemaximalpartialsumsofnegativelysuperadditive-dependent(NSD,inshort)randomvariablesisestablished.Byusingtheexponentialinequality,wepresentsomegeneralresultsonthecompleteconvergenceforarraysofrowwiseNSDrandomvariables,whichimproveorgeneralizethecorrespondingonesofWangetal.[28]andChenetal.[2].Inaddition,somesufficientconditionstoprovethecompleteconvergenceareprovided.Asanapplicationofthecompleteconvergencethatweestablished,wefurtherinvestigatethecompleteconsistencyandconvergencerateoftheestimatorinanonparametricregressionmodelbasedonNSDerrors.

  • 标签: 随机变量序列 完全收敛性 应用程序 数组 指数不等式 最大部分和
  • 简介:Inthispaper,thesharpdistortiontheoremsoftheFr′echet-derivativetypeforasubclassofbiholomorphicmappingswhichhaveaparametricrepresentationontheunitballofcomplexBanachspacesareestablished,andthecorrespondingresultsoftheabovegeneralizedmappingsontheunitpolydiskinC~narealsogiven.Meanwhile,thesharpdistortiontheoremsoftheJacobideterminanttypeforasubclassofbiholomorphicmappingswhichhaveaparametricrepresentationontheunitballwithanarbitrarynorminC~nareobtained,andthecorrespondingresultsoftheabovegeneralizedmappingsontheunitpolydiskinC~naregotaswell.Thus,someknownresultsinpriorliteraturesaregeneralized.

  • 标签: 双全纯映射 参数表示 定理 失真 多复变量 Frechet导数
  • 简介:Inthisstudy,weinvestigatedthecommunitystructureofcrustaceans(decapodandstomatopod)inhabitingthesandymudbottomsofLaizhouBay(northeasternChina)monthlyfromMay2011toApril2012.InvestigationwasstoppedfromDecember2011toFebruary2012becauseoftheextremeweatherandseaice.Atotalof205,057specimensbelongingto31species(shrimp,15;crab,15;andstomatopod,1)werecollectedin148hauls.From2011to2012,Oratosquillaoratoriawasthedominantbiomassspecies(47.80%),followedbyCharybdisjaponica(15.49%),Alpheusjaponicas(12.61%),Portunustrituberculatus(6.46%),andCrangonspp.(4.19%).Crangonspp.wasthemostdominantspeciesbyindividual(32.55%).O.oratoriawasthemost-frequentlyencounteredspecies(81.76%),followedbyPalaemongravieri(70.95%),C.japonica(65.54%),A.japonicas(62.16%),andP.trituberculatus(54.73%).ThebiomassdensityincreasedfromAugusttoSeptember2011anddecreasedfromMarch2012toApril2012.Thedynamicsoftheecologicalindicesevolveinasimilarmanner,withhighvaluesofdiversityandevennessandrichspeciesfromMaytoJune2011andlowvaluesfromSeptembertoOctober2011.O.oratoria,C.japonica,andP.trituberculatusdifferedbybiomassdatabetweengroupsI(samplesobtainedfromSeptembertoOctober2011)andII(samplesinothermonths).Thesespeciescontributedmorethan70%tothesimilarityofthecrustaceancommunitystructure.Furthermore,thesubsetsofenvironmentalvariablesthatbestmatchedthecrustacean-assemblagestructurewereasfollows:waterdepth(WD)insummer(JunetoAugust);seasurfacetemperature(SST),dissolvedoxygen(DO),andWDinautumn(SeptembertoNovember);andDO,salinity,andWDinspring(MarchtoMay).ThecalculatedcorrelationcoefficientsandsignificancelevelwerehigherintheperiodofJulytoAugust2011thaninothermonths.Comparing2011to2012with1982to1983,thespeciescompositionremainedstable.However,thedominantspecieschangedsignificantly.Highvalueandlargespecies,suchasF.chinensis,P.trituberculatus,

  • 标签: 中国对虾 环境变量 十足目 甲壳类 莱州湾 月变化
  • 简介:Theauthorsstudytheempiricallikelihoodmethodforpartiallylinearerrors-in-variablesmodelwithcovariatedatamissingatrandom.Empiricallikelihoodratiosfortheregressioncoefficientsandthebaselinefunctionareinvestigated,andthecorrespondingempiricallog-likelihoodratiosareprovedtobeasymptoticallystandardchi-squared,whichcanbeusedtoconstructconfidenceregions.Thefinitesamplebehavioroftheproposedmethodsisevaluatedbyasimulationstudywhichindicatesthattheproposedmethodsarecomparableintermsofcoverageprobabilitiesandaveragelengthofconfidenceintervals.Finally,theEarthquakeMagnitudedatasetisusedtoillustrateourproposedmethod.

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