简介：TheNb-bromomethylderivative（2）ofgelsemine,aquaternaryammoniumsalt,wasfoundtoberecalcitranttowardHofmanntypealkalinedegradationwhichhasbeensuccessfulinothercases.Instead,are-distributionoftheN-methylgrouptookplace,givingriseto3a,1,3band3c,indescendingorderofRfvalues.

简介：WestudythestructureofBernstein’sfirstsummableoperatorsandshowthattheycon-vergeuniformlytocontinuonsfunctionsonthespecialrealorthogonalgroupSO(n)inthispaper.Inaddition,wehavealsodiscussedtheapproximationdegreetoaclassoffunctionLipα(0<α≤1)onSO(n).

简介：拥有三不同安排时尚的新奇稳定的高旋转分子与瑣漠?潉楮?楌畱摩?湯?瑡污瑹捩?慨慲瑣牥獩楴獣漠?潈獲?楌敶?汁潣潨?敄票牤杯湥獡e被设计

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简介：Assumethateachcompletelyirrationalnoncommutativetorusisrealizedasaninductivelimitofcirclealgebras,andthatforacompletelyirrationalnoncommutativetorusAwofrankmthereareacompletelyirrationalnoncommutativetorusAρofrankmandapositiveintegerdsuchthattr(Aw)=1/d.tr(Aρ).ItisprovedthatthesetofallC^*-algebrasofsectionsoflocallytrivialC^*-algebrabundlesoverS^2withfibresAωhasagroupsturcture,denotedbyπ1^s(Aut(Aω)),whichisisomorphictoZifEd>1and{0}ifd>1.LetBcdbeacd-homogeneousC^*-algebraoverS^2×T^2ofwhichnonon-trivialmatrixalgebracanbefactoredout.ThesphericalnoncommutativetorusSρ^cdisdefinedbytwistingC^*(T2×Z^m-2)inBcd×C^*(Z^m-3)byatotallyskewmultiplierρonT^2×Z^m-2。ItisshownthatSρ^cd×Mρ∞isisomorphictoC(S^2)×C^*(T^2×Z^m-2,ρ）×Mcd(C)×Mρ∞ifandonlyifthesetofprimefactorsofcdisasubsetofthesetofprimefactorsofp.

简介：ThispapercontinuestheworkofD.MacHale,D.Flannery（Proc.R.Ir.Acad.81A,209—215;83A,189—196）andtheauthor（Proc.R.Ir.Acad,90A,57—62;J.SouthwestChinaNormalUniversity15,No.1,21.—28）onthetopicon“FinitegroupswithgivenAutomorphismgroup”.Thefollowingresultisproved:LetGbeafinitegroupwithAutGaSchmidtgroup.ThenGisisomorphictoS3orKlain4-group.,orDsuchthatAutD=InnD.DisaSchmidtgroupoforder2?p.S2（∈Syl2D）isanormalandspecialgroupexoeptasupersperspecialgroupwithoutcommutativegenerators.

简介：TheHuayuGroupiscomposedofonecoreenterprise,nineclosely-relatedenterprisesand16loosely-relatedenterprisesinAnhui,JiangsuandZhejiang.Itsbusinessincludesfinance,materials,knitwear,garmentsandeducation.AnhuiChuzhouHuayu(Group)Co.Ltd.—acoreenterpriseofHuayuGroup—isacomprehensiveenterprisegroup,integratingproduction,trade,scientificresearchanddevelopment.Ithasastaffof4,000,andeightfactoriesandfivecompaniesunderitsadministration.Majorproductsincludesixseriesyarn

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简介：2006年初秋，三诺又向市场推出了一款旗下永恒系列的新品：N-35G。N-35G应用了全新的电子分频技术与全新的功放芯片，但售价却仅为488元，而N-35G也可以说是国内第一款中档价位而应用到电子分频技术的音箱产品。

简介：Itisprovedthatthereisnochaoticgroupactionsonanytopologicalspacewithfreearc.InthispaperthechaoticactionsofthegrouplikeG×F,whereFisafinitegroup,arestudied.Inparticular,underasuitableassumption,ifFisacyclicgroup,thenthetopologicalspacewhichadmitsachaoticactionofZ×Fmustadmitachatotichomeomorphism.Atopologicalspacewhichadmitsachaoticgroupactionbutadmitsnochaotichorneomorphismisconstructed.

简介：TheAnhuiChizhouJiedaGroupiscomposedof58units,includingAutoTransportGeneralCompany,JiedaCo.Ltd.,ComprehensiveDevelopmentGeneralCompanyandindependentlyaccountingunitsdirectlyaffiliatedtothegroup.Businessscopeinvolvesautotransportation,realestatedevelopment,garmentmaking,tourism,hotel,internalandexternaltrade,decoration,electronicdevelopment,buildingmaterials,repairandprinting,thusformingapatternwithtransport,tourism,industryandtradeasthefourpillars.Ithasnowastaffof4,000,assetsofRMB140million,

简介：BangbuBayiChemicalsGroupisanenterpriseassignedbytheMinistryofChemicalIndustrytoproducenitrochlorobenzeneseriesproducts.Ithasstrongtechnicalforces,advancedproductiontechnologyandqualitycontrolmeasures.Productsinclude20varietiesofchloro-anhydrideseriesandnitrochlorobenzeneseries.Theyarewidelyusedinpesticides,medicines,dyestuffs,rubber,dailychemicals,leatherandpapermaking.Amongthese,thepara-nitrochlorobenzeneandotherthreeproductsrankfirstinproductionscaleinChina,winningthetitlesofexcellentproductsfromtheMinistryofChemicalIndustry.ManyproductssellwellinsoutheastAsia,EuropeandtheAmericas.

简介：IntroductionTeachingpractice(TP)isanessentialcomponentoftheEnglishcourseatTeachers’collegesinChina,inwhichnewrecruitsareprovidedwithaplatformtoputwhattheylearninthetrainingprogrammeintopractice.Theradicalchangefromlearnertoteacherusuallymeansadifficultbeginningfortrainees,althoughtheyhavefirst-handexperienceoflearningEnglishasaforeignlanguage.Facingatextbook,ofwhicheachlessonconsistsofseveralcomponents:newwords,sentencepatterns,text,grammar,andexercises,theyarerequiredtoworkoutlessonplanswhichwillensuretheachievementoftheteachingobjectives.

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简介：WeknowthatforacodeC,it‘sveryimportanttofindouttheAutomorphismgroupAutCofC.However,itisverydifficulttoseekentireAutC.Inthispaper,usingtheG.Iofmatricesoverafinitefield,wegiveseveralmethodstojudgewhetherapermutationσ∈S_n.(Symmetricgroup)belongstoAutCornot.Theyarehelpfulforthepurposetoex-

简介：由数列极限定义知：当limn→∞αn存在时，limn→∞αn+1=limn→∞αn，这个结论在解题中有什么应用呢？请看下面的例题。

简介：一问题的提出本刊2003年第5期刊载了《运用发现法解题》(以下简称《解题》)一文，文章在谈到“归纳发现法”时，提到这样一个例子：

简介：学习《有理数的乘方》一节后,经常遇到(-1)4、-14、(-2)4、-24、(-2)3、-23等形如(-a)n与-an的乘方运算.初一同学由于概念不清,常出现这样或那样的错误.其实二者有着本质的区别.一、写法不同(-a)n用了小括号;-an没有用小括号.

简介：TheChinaAero-TechnologyI/ECorporation(CATIC),ranked20thamong500enterpriseswiththelargestvolumeofimportsandexportsinthepastthreeyears,foundedtheCATICGroupinAugust1993.Notlongago,ourcorrespondentvisitedMr.LiZhoushu,DeputyDirectoroftheManagementBoardoftheGroup.Reporter:WhatwastheaiminfoundingoftheCATICGroup?Mr.Li:CATIC,foundedin1979,isaState-ownedenterpriseintegrating

简介：<正>NewHopeGroupisanon-governmentalenterprisegroupinthecountrythattakesfodderplantsastheleadingindustryandrealestateandfinancialinvestmentasthesecondaryindustrialplatform,stretchingitsbusinessscopeintothesectorsofinternationaltrade,high-gradeprintingandelectronictechnology.WithitsheadquartersbasedinChengduCity,SichuanProvince,thegrouphas67exclusively