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  • 简介:由使用修改印射的方法,我们发现Petviashvili方程的新准确答案。在这篇论文获得的解决方案包括Jacobian椭圆形的函数解决方案,联合Jacobian椭圆形的函数解决方案,soliton解决方案,三角形的函数解决方案。

  • 标签: Petviashvili方程 雅可比行列式 椭圆形方程 修改映射方法
  • 简介:Ageometricframeworkisproposedfornonlinearmodelswithrantiomeffects,basedonamodifiedversionofthegeometricstructurepresentedbyBates&Wattes(1980).Thisgeometricframeworkisusedtostudysomeasymptoticinferenceintermsofcurvaturesfornonlinearregressionmodelswithrandomeffects.Severalpreviousresultsareextended.

  • 标签: 渐进推论 非线性模型 随机效应 几何框架 微分方程
  • 简介:ItwasagreatpleasuretobeinbeautifulFlorencewithover7,000geoscientstswhohadregistered.Iwasverymuchinvolvedintwosymposiaongeoethicsandgeoeducation.Theybothwentverywell,butitwasinterestingthatthegroupswhocameweresmall.Inourdiscussionapointofagreementwasthatwemustattackthegreatglobalproblemssuchasvastmalnutritionandthefactthatmostoftheworldpopulationhasproblemswithfoodandwaterresources,notgold!,

  • 标签: IGC 地质研究 学术交流 发展规划 社会需求
  • 简介:EmbrechtsandVeraverbekeinvestigatedtherenewalriskmodelandgaveatailequivalencerelationshipoftheruinprobabilities(?)(x)undertheassumptionthattheclaimsizeisheavy-tailed,whichisregardedasaclassicalresultinthecontextofextremalvaluetheory.Inthisnoteweextendthisresulttothedelayedrenewalriskmodel.

  • 标签: DELAYED RENEWAL risk model heavy-tails RUIN
  • 简介:Abstract.Thispaperstudiesthefiniteelementmethodforsomenonlinearhyperbolicpartialdifferentialequationswithmemoryanddamplingterms.ACrank-Nicolsonapproximationforthiskindofequationsispresented.ByusingtheellipticRitzVolterraprojection,theanalysisoftheerrorestimatesforthefiniteelementnumericalsolutionsandtheoptimalH1-normerrorestimatearedemonstrated.

  • 标签: 有限元法 非线性微分方程 Crank-Nicolson近似值 双曲线方程
  • 简介:TheexpressionofcyclotomicpolynomialΦ_(pq)(x)isconcernedforalongtime.AsimpleandexplicitexpressionofΦ_(pq)(x)inZ[x]hasbeenshowed.TheformofthefactorsofΦ_(pq)(x)overF_2andtheupper,lowerboundsoftheirHammingweightareprovided.

  • 标签: 多项式 系数 因子 Фpq(x)
  • 简介:Inthepapertheauthorsestablishfourtheoremsontwo-independent-variableGronwall-typeinequalitiesinvolvingimproperintegralswithinfiniteintegrationlimits.Theresultsobtainedimproveandgeneralizethemainresultsprovedintherecentpaper[5]byA.Corduneanu.TwoclassesofnonlinearcontinuousfunctionsdefinedbyF.M.Dannan[6]areappliedinthisarticle.AndtheresultscanbeusedashandytoolsinthestudyofmanyVolterraintegralandintegro-differentialequationswithimproperintegralfunctionals.

  • 标签: INFINITE VOLTERRA generalize limits INEQUALITY BOUNDS
  • 简介:Ⅰ.Mediabackground'Rareearth'hasbecomeahottopicgloballysince2009.TheTimesofUKpublishedanarticleentitled'Chinatakeschargeofkeystotechnologies'future'on9thMarch2009,inwhichChinawasconsideredtohavebecomethelargestmonopolycountryonrareearthmetals'supplyandtheleadingpositionwouldmakeChinacontrolthefutureofconsumerelectronicproductsandgreentechnology.Triggeredbythearticle,moreandmoreattentionswerepaidto'Chinarareearth'bymediainsideandoutsideChina.

  • 标签: 稀土产业 中国 科学技术 消费电子产品 充电技术 绿色技术
  • 简介:Thesediment-hosteddisseminatedgolddepositsintheOinlingregionareofsedimentation-slight-metamorphicoriginsuperimposedbyhydrothermalreworkingatmoderate-lowtemperaturesandarewellcomparablewiththetypicalCarlingolddepositsintheUnitedStates.Inviewoftheconfusingconceptconcerningthe“sediment-hosted”and“Carlin-type”golddeposits,theauthorsproposethattheterm“sediment-hostedgolddeposit”shouldbeusedinabroadsensewhichencompassesatleastthefoursubtypes,i.e.,theCarlintype,themetamorphicfineclastictype,thehydrothermalsedimentarytypeandtheveintype.Inoterwords,the“Carlin-type”shouldnotbeusedasasynonymfor“sediment-hosted”butisrecommendedasasubtypeunderthegeneralcategoryof“sediment-hostedgolddeposits”

  • 标签: 金矿床 秦岭地区 沉积物 矿化作用 成因
  • 简介:Asanintegralcomponentofthe"OneBeltandOneRoad"strategicvision,theconstructionofthe21stCenturyMaritimeSilkRoadwillreflectthedevelopingpathofChina'smaritimegeo-economywithsignificantpolit-icalanddiplomaticimplications.Althoughtheconstructionofthenewmaritimesilkroadhasits?endogenouslogicandjustifiedconsiderations,itwillencountervariouschallengesanddifficulties.Inordertoachievethestrategicgoalofsettingupacommunity?ofcommoninterestand?destinywiththerelativecountries,the"MaritimeSilkRoad"programhastobeadvancedcautiouslywiththeprinciplesofwideconsultation,jointcontributionandsharedbenefits.

  • 标签: 21st CENTURY MARITIME SILK Road MARITIME
  • 简介:为部分因素的图案的一个基本、实际的问题是最佳的因素赋值的问题。最近,一些新标准WV标准,NB标准和一致性标准例如概括最小的错误,为比较并且选择部分被建议。在这篇论文,我们显示这些标准为对称的部分阶乘图案同意相当好。

  • 标签: 分数因子分解 NB标准 优优化标准 对称性 WV标准
  • 简介:Iteratedfunctionsystems(IFS)wereintroducedbyHutchinsonin1981asanaturalgeneralizationofthewell-knownBanachcontractionprinciple.In2010,D.R.SahuandA.ChakrabortyintroducedK-IteratedFunctionSystemusingKannanmappingwhichwouldcoveralargerrangeofmappings.Inthispaper,followingHutchinson,D.R.SahuandA.Chakraborty,wepresentsomenewiteratedfunctionsystemsbyusingtheso-calledgeneralizedcontractivemappings,whichwillalsocoveralargerangeofmappings.OurpurposeistoprovetheexistenceanduniquenessofattractorsforsuchclassofiteratedfunctionsystemsbyvirtueofaBanach-likefixedpointtheoremconcerninggeneralizedcontractivemappings.

  • 标签: 广义压缩映射 迭代函数系统 BANACH 压缩原理 定理证明 IFS