简介:Thepaperpresentsthreeformalprovingmethodsforgeneralizedweaklygroundterminatingproperty,i.e.,weaklyterminatingpropertyinarestricteddomainofatermrewritingsystem,onewithstructuralinduction,onewithcover-setinduction,andthethirdwithoutinduction,anddescribestheirmechanizationbasedonameta-computationmodelfortermrewritingsystems-dynamictermrewritingcalculus.Themethodscanbeappliedtonon-terminating,nonconfluentand/ornon-left-lineartermrewritingsystems.Theycando"forwardproving"byapplyingpropositionsintheproof,aswellas"backwardproving"bydiscoveringlemmasduringtheproof.
简介: 某日,放下充斥生活的黑人音乐,突然渴望去触碰那些很少尝试的陌生音符.其中,有五张专辑,完全被封面所吸引,上面的女性,让我不自觉的产生聆听的冲动.她们风格不同,嗓音不同,却有着让人一见钟情的CDCover,我想,她们,正是CoverGirls吧.……
简介:紫外(紫外)放射穿上重要效果生态系统,环境,和人的健康,以及大气的过程和气候变化。二紫外放射数据集在这份报纸被描述。一个人时时包含从2005~2015在40个中国生态系统研究网络车站测量的紫外放射的观察。CUV3宽带辐射计被用来观察紫外放射,与5%的精确性,它满足世界气象学组织测量标准。极值方法被用来控制测量数据集的质量。另外的数据集包含用与一个混合模型相结合的一个所有天空评价模型是计算的每天累积的紫外放射估计。从1961~2014的重建的每天紫外的放射数据跨度。吝啬的绝对偏爱错误和root-mean-square错误至多比30%小吝啬的偏爱错误价值的车站,和大多数是否定的,它显示紫外放射紧张的低估。这些数据集能在紫外放射改进我们空间、时间的变化的基本知识。另外,这些数据集能在潜力的研究被使用臭氧形成和大气的氧化,以及生态的进程的模拟。
简介:Thispaperaimstoachieveanalysisandexperimentresultsthatrelatetomechanicscapabilityandstructuralparameterofaspecialsaddleshellofrevolution.Theoreticallyspeaking,thesaddleshellofrevolutionconsistsofatoroidalshellandasphericalshell.Theshellssimultaneousequationscanbesolvedwithharmoniousterms.Where,thefundamentalequationscanbesolvedbyasymptoticexponentialperturbationmethod.TheequationsofspecialsolutioncanbesolvedbyHovozhilovsspecialsolution.Thisnewideaisfromastudyofsomeexistingsolutionsofthetoroidalshell.Theresultshavebeenprovedbycomparedwithsomeexperimentalresults.Theexperimentsaimstostudytheeffectcausedbychangeofmaterialparameter,orbychangeofdifferentgeometricdimensionsofthesaddleshell,whichincludethechangeofthickness,thechangeofradiusofshell,andthechangeofribs.Finally,theacceptedproductofthesaddleshellwerereinforcedbyatoroidalribhasbeensubmitted.
简介:Organizedby:BeijingNormalUniversity,NationalNaturalScienceFoundationofChinaHostedby:InstituteofResourcesScience,BeijingNormalUniversityKeyLaboratoryofEnvironmentalChangeandNaturalDisaster,MinistryofEducationofChinaTopics:1)DetectingandmonitoringLUCC2)Temporal-spatialcharacteristicsinLUCC3)DrivingmodelforLUCC4)ForecastingandmodelingLUCC5)PhenologicalandbiochemicalresponseonLUCC6)RegionalLUCCandmicroclimate7)LUCCinthecontextofglobalchange8)Impactofglobalchangeonthesustainableland-usemodelingAbstractsubmission:TheofficiallanguageofthisconferenceisEnglish.WeinvitepaperswritteninEnglishandanabstractoflessthanonepageofstandardA4sizetotheConferenceSecretariatbyApr15,2001.RegistrationFee:280US$(300US$afterJuly15,2001)Add:No.19,XinjiekouwaiStreet,100875,InstituteofResourcesScience,BeijingNormalUniversity,Beijing,ChinaTel:86-10-62207656or62209024Fax:010-62208178http://202.112.93.50/LUCCD2001/index.htmlE-mail:Pwang@bnu.edu.cnCyh@bnu.edu.cn
简介:Thispaperpresentsanewhybridgeneticalgorithmforthevertexcoverproblemsinwhichscan-repairandlocalimprovementtechniquesareusedforlocaloptimization.Withthehybridapproach,geneticalgorithmsareusedtoperformglobalexplorationinapopulation,whileneighborhoodsearchmethodsareusedtoperformlocalexploitationaroundthechromosomes.Theexperimentalresultsindicatethathybridgeneticalgorithmscanobtainsolutionsofexcellentqualitytotheprobleminstanceswithdifferentsizes.Thepuregeneticalgorithmsareoutperformedbytheneighborhoodsearchheuristicsprocedurescombinedwithgeneticalgorithms.
简介:Thispaperbrieflysummarizestheworksintheprocessingofstronggroundmotiondata,thefactorsaffectingstronggroundmotion,themodelingofstronggroundmotionandthecalculatingofbroad-bandresponsespectrumwhichhavebeendonerecentyearsbyengineeringseismologistsandseismologistsofChina.Inaddition,wethinkbacktotheinternationalcooperationinstronggroundmotionoftherecentyearsandmakesomeexpectationsforthefuture.
简介:JinheHydropowerStation(Changdu,Tibet),thekeyprojectsetinthe10thFive-yearPlaninTibet,hasbegunconstructiononDecember6,2001.ThediversiontypestationissituatedontherightbankofLancangRiver,withintheboundariesofChangduCounty.Itisaninterbasindevelopedprojectwitha