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简介：纽约是美国最著名的城市。你知道她的别名吗？原来纽约也叫做“大苹果”（TheBigApple）o

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简介：Asapoemgoes,thewarmthandhopeofspringcanbefeltimmediatelyafteritembracestheworld.Inthisdynamicandfreshseason,onbehalfoftheChineseAssociationforInternationalUnderstanding(CAFIU),I’dliketoextendcordialgreetingsandwishestothereadersoftheInternationalUnderstandinghomeandabroadandtopeoplefromallwalksoflifeforyourlongstandinginterestandsupportfortheworkanddevelopmentofCAFIU!

简介：Apreviouslypublishednewrotationfunctionhasbeenimprovedbyusingadynamiccorrelationcoefficientaswellastwonewscoringfunctionsofrelativeentropyandmean-square-residuestomaketherotationfunctionmorerobustandindependentofaspecificsetofweightsforscoringandranking.ThepreviouslydescribednewrotationfunctioncalculatestherotationfunctionofmolecularreplacementbymatchingthesearchmodeldirectlywiththePattersonvectormap.Thesignal-to-noiseratioforthecorrectmatchwasincreasedbyaveragingallthematchingpeaks.Severalmatchingscoreswereemployedtoevaluatethegoodnessofmatching.Thesematchingscoreswerethencombinedintoasingletotalscorebyoptimizingasetofweightsusingthelinearregressionmethod.Itwasfoundthatthereexistsanoptimalsetofweightsthatcanbeappliedtotheglobalrotationsearchandthecorrectsolutioncanberankedinthetop100orless.However,thissetofoptimalweightsingeneralisdependentonthesearchmodelsandthecrystalstructureswithdifferentspacegroupsandcellparameters.Inthiswork,wetrytosolvethisproblembydesigningadynamiccorrelationcoefficient.Itisshownthatthedynamiccorrelationcoefficientworksforavarietyofspacegroupsandcellparametersintheglobalsearchofrotationfunction.Wealsointroducetwonewmatchingscores:relativeentropyandmean-square-residues.Lastbutnotleast,wediscussedavalidmethodfortheoptimizationoftheadjustableparametersformatchingvectors.

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简介：ＴｉｂｅｔａｎＮｅｗＹｅａｒｓＤａｙＡｇｒｏｕｎｄｍａｒｋｅｔｉｎＢａｒｋｏｒＳｔｒｅｅｔ，Ｌｈａｓａ，ｂｅｆｏｒｅｔｈｅａｄｖｅｎｔｏｆｔｈｅＴｉｂｅｔａｎＮｅｗＹｅａｒｓＤａｙ．ＴＡＮＧＺＨＡＯＭＩＮＧＯｎｔｈｅＴｉｂｅｔａｎＮｅｗＹｅａｒ?..

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简介：The’polarcoding’proposedbyDr.Arkancanachievethesymmetriccapacityofbinary-inputdiscretememorylesschannels(B-DMC).ThegeneratormatrixofpolarcodesisGN=BNFnforN=2n,BNwasapermutationmatrix.Inthearticleitwasrealizedwithaninterleaver,sothematrixproductionofGNwasavoided;thenthegeneratormatrixwasjustdeterminedbythematrixFnwhichwasconstructedwiththreesub-matrixesofFn-1andone2N-1orderzeromatrix,itwasdealwithfastHadamardtransform(FHT)algorithm.Thecomplexityofthenewschemewasreducedsharply,andaniterativealgorithmalsocanbeused.TheexampleshowedthatwhenN=8,complexityoftheencodingschemewasjust16whichisobviouslylessthanthatoforiginalencodingscheme36.

简介：AnewphytoecdysteroidwasisolatedfromtherootofRhaponticumuniflorum.Itsstructurehasbeenshowntobe2,3,20,22-diacetonideajugasterone.

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简介：一在标志空间的众所周知的混乱印射是印射的移动。然而，在标志空间的另外的混乱mappings也存在。基本变化是同等地在是的一套时间考虑这个过程不仅spaced，在分开统一时间说(印射的移动)，但是在不是的一套时间同等地spaced，如果联合起来的时间不能被确定，说。增加作为印射的移动和k-switchmapping的归纳印射被介绍。增加和k开关mappings是混乱的。

简介：Theresistanceseenintotheportinann-cubeformedbytwoverticesofdistancen-1isexactlyformulatedforanyposiiveintegern.Theresistancesseenintotheportinann-cubeformedbyanytwoverticesisalsofoundbyexperimentsfor1≤n≤7.

简介：Aftertwoyears’construction,instal-lationandadjustment,aproductionlinewithadesignedcapacityofprocessing400tonsREoxidesperannumhasbeenputintooperationintheZhuJiangRe-fineryPlantinSept.1989.Theprojectusedaninvestmentof30millionyuan,whichwasjointlyinvestedbytheZhuJiangRefineryPlant,theGu-angDongInformation&TechniqueDeve-lopmentCompanyandtheYueHuaNonfer-rousMetalsAssociatedExploitationCom-

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