简介:<正>XingtangCountyislocatedinthesouthwestofChina’sHebeiProvince,240kilometersfromBeijing.Coveringanareaof1,025squarekilometers,Xingtangisdividedinto4towns,11townshipsand1provincialleveleconomicdevelopmentzone.Therearealtogether330
简介:摘要院过程是一种十分有用的程序设计技术,本文不仅阐述了通用过程、事件过程、function过程的区别,还对递归过程予以解析。同时结合实例进行了分析,旨在程序设计时,能正确的使用过程,以及灵活应用递归解决实际问题。
简介:Nowadays,thedisparityofthebasicpensioninlocalregionsofChinacanbedescribedasfollows:thelowleveloftheunificationofthebasicpensionsystems,thelargedisparityofthelevelofthebasicpension,andunfairnessoftheenterprises’paymentforthebasicpensionindifferentlocalregionsinChina.Thesehavealreadybroughtmanynegativeinfluences,whichhavegreatlyheldbackthedevelopmentofthesocietyandnationaleconomy.WeshouldbuildthebasicpensionsysteminalllocalregionsofChinaasawhole,whichcancoverallpeopleanddecreasethedisparityindifferentlocalregionsinChina.
简介:我们调查用操作的一个特殊的类列出联合的问题,前缀移动。联合作为0和1的位串被代表,并且前缀移动是旋转的操作由一个位置到的一点绳的某前缀左或正确。我们把一个否定答案给F问的一个开的问题。Ruskey和威廉斯·阿(由前缀移动产生联合,在Proc。第11年度国际计算和组合数学会议2005,LNCS3595,Springer,2005,pp.570576),那是我们是否能由仅仅在位串上使用三很基本的前缀移动产生联合,它是开始的二位和由在任何一个方向的一个位置的全部位串的旋转的调换(即,使用排列σ2,σn和σn?1到位串的索引)。电子增补材料这篇文章(doi:10.1007/s11390-007-9094-7)的联机版本包含增补材料,它对授权用户可得到。
简介:-Turbulentflowisabasicformoffluidmotionwidelyobservedinnature.Inhydraulicengineering,especiallyinthestudyofsedimentmovement,turbulenceisakeyproblem.Inthispaper,basedonthestochastictheoryofwallturbulencedevelopedbytheauthorandtheresultsbyotherinvestigators,fluc-tuationandmeanstructuresanddragcoefficientforNewtoniananddragreductionflowsinallstates(laminar,transitional,turbulent)andinallregions(smooth,transitional,rough)aretheoreticallydiscussedindetail.Generallawsforlaminarandturbulentflowsobtainedbytheauthorareverifiedbytheexperimentalresultsobtainedbyothers,andthereisgoodagreementbetweenthem.
简介:ThereisagreatdifferencebetweenthenewtypeindustrializationroadinChinaandtheroadofindustrializationfirst,theninformatizationandatlastecologizationinwesterndevelopedcountries.Industrialeco-economicsisoneofthecriticalbranchesofeco-economics.Itisasubjectofobjectivelawofstructuralupgrading,functionaloptimizationandhighlyefficientrunningofindustrialeco-economicsystem,whichiscombinedwithindustrialeconomicsystemandeco-systemundertheconditionofintellectualeconomyandcirculareconomycombinations.Meanwhile,itisarelativelyweaksubjectintheresearchfieldofeco-economicsinChinaforthetimebeing.Takingthepracticeroadofnewtypeindustrializationneedstheguidanceofindustrialeco-economics.Themodernindustrialeco-economicsinthe21stcenturymustbeadaptedtotheneedofnewtyperoadofindustrializationinChina.Thepaperanalyzesthestatusquoofresearchandthemaincontentsofindustrialeco-economicsandtriestostudysomekeytheoriesofthebranchsubject.
简介:LetXbeaBanachspaceand{ej}j=1beasequenceinX.Theauthorshowse∞that{ej}∞j+1isabasicsequenceifandonlyif∑n∞=1rnαnjconvergesforeveryj>1ande∞-∞∞e∑∞n=1rn∑∞j=1αnjej=∑j=1(∑∞n=1rnαnj)jholdsforeverychoiceofscalarvariables{αnj}suchthat∑∞n=1αnjejconvergesforeachn>-1andanychoiceofscalarvariables{rn}suchthat∑∞n+1∑∞f=1rnαnjejconverges.Moreover,someapplicationsabouttheresultaregiven.
简介:摘要在我教过的八年级学生中,大部分都认为VB很难学,尽管有很少部分学生掌握了书本的例子,但一到用VB解决日常生活的问题就无从下手了。我也和教VB的老师交流过,普遍都认为学生学习VB的热情不高,主要原因是不知道如何学起,学起来很难。老师教好VB是责无旁贷的,但是教学生学VB不是要让他们成为程序员,而是以培养兴趣为主,能解决日常生活的小问题就可以了。我认为可以从四方面论述如何教好VB。
简介:Tbegoalofthispaperistoresearchonenewcharacteristicofcomplexsystem.Brittleness,whichisonenewcharacteriticofcomplexsystem,ispresentedinthispaper.Thelinguisticandqualitativedescriptionsofcomplexsystemarealsogiveninthispaper.Otherwise,thequalitativedescriptionofcomplexsystemispresentedatfirst.Onthebasisofanalyzingtheexistingbrittlenessproblems,linguisticdescriptionandmathematicdescriptionofbrittlenessaregivenaswell.Threekindsofphenomenatojudgebrittlenessofcomplexsystemarealsogiven,basedoncatastrophetheory.Basiccharacteristicsofbrittlenessaregivenonthebasisofitsmathematicdescription.Twocriticalpointsetsaredefinedbyusingcatastrophetheory.Thedefinitionofbrittlenessanditsrelatedtheorycanservethecontrolofcomplexsystem,andprovidetheoreticalbasisforthedesignandcontrolofcomplexsystem.