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简介：SupposeQ（ζm）isthem-thcyclotomicnumberfield,whereζmisanm-thprimitiverootofunity,m>1anyinteger.Letam=ζm+ζm2+...+ζm（m-1）/2ifmisoddandletβmbetheproductoftheintegersl-ζm（1<jj,m）=1）ifmhasatleasttwodistinctprimedivisors.ItisprovedthatbothamandβmgeneratepowerbasesofQ（ζm）,i.e.,Z[am]=Z[βm]+Z[ζm].Theauthoralsoconjecturesthatthereisnootherpowerbasisgeneratorexceptζmuptoequivalence,andprovesthatthisisthecasewhenm=8,9and12.Thecorrespondingresultform=panoddprimewasalsoobtainedbyA.Bremnerwithadifferentmethod.

简介：Sincetheverypurposeofastatethatgainspoweristomaintainsocialorderandincreasepeople'sinterests,thestateisentitledtometeoutpunishmentforanyviolationsofpublicorderoranyoffensestothecommunity.Thisistheminimumobligationofastatetoprotectitspeople.Fromtheperspectiveoftheoperationofstatepower,adespoticstatetakesexecutivepowerasitscore.Executivepowerisnotonlythepowerthatkick-starts,butalsothepowerthathasthefinalsay.Sinceparliamentary

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简介：Guangdong,acoastalprovinceinsouthChina,hadverypoorfoundationofindustryinthepast.AftertheestablishmentofPeople’sRepublicofChinain1949,undertheleadershipandunifiedplanningofthecentralgovernment,economyconstructionofbothindustryandagriculturehavebeenboostedandhencetheprovicialelectricpowerindustryhavedevelopedaccord-ingly.Especiallysince1979,theimplementationofreformationand

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简介：The1stphaseprojectofSanmenNuclearPowerStationinsupportofindependentdevelopmentwasoverallinitiatedinApril.

简介：InordertoeffectivelyimitatethedynamicoperationcharacteristicsoftheHVDC(highvoltagedirectcurrent)powertransmissionsystematareal±500kVHVDCtransmissionproject,theelectro-mechanical-electromagnetictransienthybridsimulationwascarriedoutbasedonadvanceddigitalpowersystemsimulator(ADPSS).Inthesimulationanalysis,thebuilthybridmodel'sdynamicresponseoutputsunderthreedifferentfaultconditionsareconsidered,andbycomparingwiththeselectedfaultrecordingwaveforms,thevaliditiesofthesimulationwaveformsareestimatedqualitatively.ItcanbeascertainedthatthehybridsimulationmodelhastheabilitytodescribetheHVDCsystem'sdynamicchangetrendswellundersomespecialfaultconditions.

简介：Inthispaper,aseriesofmajorpolicydecisionsusedtoimprovethepowergridreliability,reducetheriskandlossesofmajorpoweroutages,andrealizethemodernizationof21stcenturypowergridarediscussed.ThesedecisionswereadoptedbyAmericangovernmentandwouldalsobehelpfulforthestrategicdevelopmentofChinesepowergrid.ItisproposedthatChinashouldtakeprecaution,carryoutsecurityresearchontheoveralldynamicbehaviourcharacteristicsoftheUHVgridusingthecomplexitytheo...

简介：ChinaElectricityCouncilorganizedcompetentauthoritiesacrosstheindustryofelectricpowertoworkoutthe"ResearchReportsonthe12thFive-YearPlanforElectricPowerIndustry"innearlyoneyear,whichprovidesareferenceforgovernmentaldepartmentstoformulatethe12thFive-YearPlanonenergyandelectricpowerindustry.Themagazinewillpublishtheserialreportsincludingpowersources,powergrids,equipmentmanufacture,andpowereconomics.Thispaperpresentsthepartof"powereconomics,"inwhichtheeconomicanalysesontheelectricpowerindustryareputforward.

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简介：Powerindustryisoneofthekeyfieldsforenergyconservationandemissionsreduction(ECER)inChina.Inordertoachievethenation'soverallenergyconsumptiontargetandpollutantemissiontargetsetbythe11thFive-YearPlan,tobuildtheresource-conservationandenvironment-friendlysocietyduringthe11thFive-YearPlanperiod(2006-2010),itiscrucialtoimplementthepolicyof"Large(units)InandSmall(units)Out(LISO)"(i.e.,replacingsmallunitswithlargeones)andacceleratetheretir...

简介：Inthispaper,weobtainaresultthatimprovestheresultsofGovilandNwaeze,QaziandtheclassicalresultofRivlin.

简介：1936年1月27日，丁肇中诞生于美国密执安州安亚柏市。父亲丁观海是工程学教授，母亲王隽英是心理学教授。丁肇中的父母原希望他能出生在中国，但在他们访美期间，丁肇中提早来到了人世。

简介：WiththepassingofJürgenRemane,thegeologicalinstituteintheUniversityofNeuchǎtelandgeoscienceingeneral,lostascientistofinternationalreputation,agiftedteacher,and—aboveall—agoodfriend.

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简介：笔者认为J2EE在企业信息平台上的应用更为优越。本文讨论的是大型的浏览器/服务器模式信息平台的建设，以J2EE为架构。描述了在J2EE架构下开发通用软件平台所应具备的要素和设计方法，并给出了具体的技术实现方式描述。

简介：电视广告一直是明星们必争之宝地，这些Johnny’s明星们出演的“声色”俱全的CM中，浓缩了偶像们的精华所在，署他举手投足一颦一笑．看他跋山涉水飞檐走壁，我们也只有乖乖掏钱包的份。

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