简介：Atokamakplasmadischargeinvolvesaseriesofcomplexandconcertedactionsconductedbyitscontrolsystem.TheHL-2Acontrolsystemcanbedividedintotwopartst,themachinecontrolsystemandthedischargecontrolsystem.Themachinecontrolsystem,whichconsistsofindustrialPC(IPC),configuresandoperatesthetokamak'svarioustechnicalsubsystems.Timingsys-temisintegratedintomachinecontrolsystemgivingabsolutetimeforallsubsystems.Thedischargecontrolsystem,

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简介：Run2atFermilabbeganinMarch,2001,CDFwillcollectdataatamaximumrateof20MByte/secduringtherun.Theofflinereconstructionofthisdatamustkeepupwiththedatatakingrate.ThisreconstructionoccursonalargePCfarm,whichmusthavethecapacityforquasi-realtimedatareconstruction,forreprocessingofsomedataandforgenerationandprocessingofMonteCarlosamples.Inthispaerwewillgivethedesignrequirementsofrthefarm,describethehardwareandsoftwaredesignusedtomeetthoserequirements,describetheearlyexperienceswithRun2dataprocessing,anddiscussfutureprospectsforthefarm,includingsomeideasaboutRun2bprocessing.

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简介：1.IntroductionLetRbethecollectionofallrealnumbers,andZthecollectionofallintegers.Iff1(x)andf2(x)aretwofunctionsinL2(R),theinnerproduct2>isgivenbyWesayf1(x)andf2(x)arebiorthogonal,ifFirstletusdescribeaclassoffunctions(x)and(2)inL2(R)asfollows.Thr...

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简介：Thispapercontainsadetailed,selfcontainedandmorestreamlinedproofofthel~2decouplingtheoremforhypersurfacesfromthepaperofBourgainandDemeterin2015.TheauthorshopethiswillserveasagoodwarmupforthereadersinterestedinunderstandingtheproofofVinogradov'smeanvaluetheoremfromthepaperofBourgain,DemeterandGuthin2015.

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简介：TwonewcoenzymeB12analogues,2’,5’-dideoxycytidylcobalamin(2a)and2’,5’-dide-oxyuridinylcobalamin(2b),andtwoothers,2’,5’-dideoxyadenosylcobalamin(2c),and5’-deoxy-thymidylcobalamin(2d)werepreparedbyanimprovedmethod.AllthefouranalogueswereinvestigatedbyUV-visand2D1HNMRspectroscopy.Thecomparisonsanddiscussionabouttheirspectroscopicpropertiesweredone.

简介：是否还记得第六界兄弟杯大赛金奖“莲中珍宝”，设计师高巍的作品为人所津津乐道，获奖后高巍受到时尚界的赏识被邀请为法国访问学者。蛰伏几年后，2001年在法国推出GX-2品牌，2005年携带具有一定市场影响的GX-2品牌，高巍再次回到北京的时尚领域。

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简介：ThreeseriesofCeO2/CuOsampleswerepreparedbyimpregnationmethodandcharacterizedbyXRD,N2adsorption-desorption,temperatureprogrammedreduction(TPR),XPSandTEMtechniques.IncomparisonwiththesamplespreparedwithCuOasinitialsupport,thesampleswithCu(OH)2asinitialsupporthavehigherreducibilitiesandsmallerrelativeTPRpeakareas,andalsolargerspecificsurfaceareasatcalcinationtemperaturesof400℃–600℃.Asaresult,Cu(OH)2isbetterthanCuOasinitialsupportforpreferentialoxidationofCOinexcessH2(CO-PROX).Thebestcatalyticperformancewasachievedonthesamplecalcinedat600℃andwithanatomicratioofCe/Cuat40%.XPSanalysesindicatethatmoreinterfacelinkagesCe-O-Cucouldbeformedwhenitwascalcinedat600℃.AndtheatomicratioofCe/Cuat40%ledtoaproperreducibilityforthesampleasillustratedbytheTPRmeasurements.

简介：选用aug-cc-pVTZ及aug-cc-pVQZ基组对不同H2-H2位形进行了量子化学计算,外推出了氢分子间各向异性ab-initio作用势。依据实验数据确定出氢分子相互作用的5-体模型,在全局最优算法基础上拟合出了包含电四极矩项、多体极化作用项及三体关联项等在内的氢分子间各向异性作用势。结果验证了拟合势与ab-initio势能曲线几乎重合,两者偏差落在（-1.35K,1.29K）范围内;得出的氢分子第二维里系数与实验结果一致。

简介：4,5-Diphenyl,4,5-di(4-methylphenyl),4,5-di(4-methoxyphenyl)-2-(2,5-dimethylthioph-en-3-yl)imidazolesweresynthesized.Oxidationoftheobtainedimidazoleswithpotassiumferricyanideinwater-alcoholsolutionofalkaligavethecorrespondingdimers.ThestructureswerecharacterizedbyIR,1HNMR,massspectroscopyandelementalanalysis.Thedimersshowedphotochromisminsolutiononirradiation.

简介：Gasphasereductionofcarbonmonoxidetoformaldehydeandethylenewasfoundinelectrochemicalcellwithaninorganicionexchangerα-Zr(HPO4)2·H2Ousedassolidproton-conductingelectrolyteatroomtemperatureandatmosphericpressure.ThetypeandamountoftheelectroreductionofCOdependonthedifferentmetalelectrodesandcurrentdensities,whichgivesalankbetweenheterogeneouscatalysisandelectrochemistry.

简介：Thegeometricalstructuresof2-(2-hydroxyphenyl)pyridine(PP)anditsprotonationstateswereoptimizedbymeansoftheB3LYP/6-31G(d)method.Foralltheselectedsystems,theexistenceofH-bondisinfavorofthestabilityofthesystems.Onthebasisoftheoptimizedgeometricalstructures,theirelectronicspectrumpropertieswerestudiedbytime-dependentdensityfunctionaltheory(TD-DFT)methosdviaahybridfunctionofB3LYPand6-31G(d)basisset.TheTD-DFTcalculationresultpredictstheabsorptionspectrumofPPat324nm(3.82eV),whichisinverygoodagreementwiththeexperimentalvalueof322nm(3.85eV)determinedinsolventchloroform.TheabsorptionspectraofthetwoprotonationstatesbothexertaredshiftinvariouspHmedia.

简介：用密度泛函方法「Ｂ３ＬＹＰ／６－３１１Ｇ（ｄ）」研究了ＳｉＰ２分子的各种可能异构体的结构、能量和红外光谱。结果表明：Ｓｉ２Ｐ２分子有５个稳定的异构体，能量最低的异构体为具有Ｐ－Ｐ桥键湖蝶形结构，其次为具有Ｓｉ－Ｓｉ桥键的菱形结构，而具有Ｓｉ－Ｓｉ中心键的直线结构能量高，并进一步将Ｓｉ２Ｐ２和Ｃ２Ｎ２分子结构和能量上的差异进行了比较和分析。