简介:AnewcoexistingamphibolepairwasrecentlyfoundintheJianshanirondeposit,LoufanofShanxiProvince,China,ElectronmicroprobeanalysisshowsthatthecoexistingpairiscomposedofgrueneriteK0k.001(Na0.027Ca0.073Mn0.031Fe1.801^2+)1.932(Fe2.948^2+Mg1.964Ti0.002Al0.087)5Si8.069O22.10(OH)2andferropargasite(K0.135Na0.461)0.596(Na0.088Ca1.853Mn0.005Fe0.072^2+)2(Mn0.005Fe2.789^2+Mg0.875Ni0.021Fe0.499^3+Al0.812)5(Si6.103Al1.897)8O22.00(OH)2.Thetwokindsofamphibolesoccurinamphiboleschistnotonlyasseparatephenocrysts,butalsoarecombinedtoform"single-crystal"phenocrystsintheformoftopotacticintergrowthswiththecommonc-andb-axes.Theboundarybetweentopotacticgrueneriteandferropargasiteisopticallyandchemicallysharp.Incomparisonwiththecoexistingferromagnesianamphibloeandcalcicamphibolepairdiscoveredbypredecessors,thenewlydiscoveredpairhaslowerMg/Feratiosandwidermiscibilitygaps.
简介:各种各样的途径为解决许多连续全球优化问题被开发了。但是直到现在,更少的工作被奉献给由于固有的困难解决非线性的整数编程问题。这篇论文设法把一般非线性的整数编程问题转变成一个equivalent'专辑连续全球最小化问题。因此,任何有效全球优化算法能被用来解决非线性的整数编程问题。这结果将也在全球优化上支持研究。我们在场一个间隔Branch-and-Bound算法。数字实验证明这条途径是有效的。(作者摘要)11个裁判员。
简介:假设S是R的几乎优秀的延期。用函子HomR(S,−)并且—⊗RS,我们证实在模块德·徐·藻的班之间的一些连接发电子邮件:dxzhou@fjnu.edu.cn全文预览(小,大)[2]。Salce,L.:为可换群的Cotorsion理论。会议数学,23,1132(1979)[3]。Trlifaj,J.:无限的维的倾斜模块和Cotorsion对在倾斜理论的手册,伦敦数学。Soc。讲课笔记重量的单位,332,剑桥大学出版社,剑桥,279321,2007[4]。普通及格学生,D.S.:组的代数学结构响,WileyInterscience,纽约,1977[5]。Resco,R.:有限使正常化的延期的激进分子。Comm。代数学,9,713725(1981)[6]。薛,W.:在几乎优秀的延期上。代数学Colloq,3,125134(1996)[7]。Bonami,L.:在斜组戒指的结构上,代数学Berichte48,弗拉格·雷恩哈德·费歇尔,明兴,(1984[8]。薛,W.:在介绍模块和几乎优秀延期上。Comm。代数学,27,10911102(1999)[9]。周,D.:直角的尺寸和戒指延期。Comm。代数学,34,16311650(2006)[10]。朱,X.:扭转理论延期和有限使\/正常化延期。J。纯Appl。代数学,176,259273(2002)[11]。周,D.,Tong,W.:在n-™-injective信封和n-™-projective封面上。Comm。代数学,30,36293651(2002)[12]。薛,W.:与quasi-Frobenius戒指有关响。代数学Colloq,5,471480(1998)[13]。安德森,F.W.,福勒,K.R.:模块的戒指和范畴,第二个版本,Spring-Verlag,纽约,(1992[14]。钟声,N.,陈,J.:相对连贯和preenvelopes。Manuscripta数学,81,243262(1993)[15]。Enochs,E.:Injective和扁平的封面,信封和溶剂。以色列J。数学,39,189209(1981)[16]。薛,W.:在优秀延期的归纳上。Acta数学。越南,19,3138(1994)[17]。薛,W.,周,D.:在™-injectiv
简介:OneoftheprincipaldisadvantagesofOrthogonalFrequencyDivisionMultiplexing(OFDM)isverysensitivetocarrierfrequencyoffset.Theintegerfrequencyoffsethasnoeffectontheorthogonalityamongthesubcarriers,butitcausesacircularshiftandphaserotationofthereceiveddatasymbolssequence,resultinginaBitErrorRate(BER)of0.5.Inthispaper,anovelintegerfrequencyoffsetestimatorforOFDMisderivedbasedonmaximumlikelihoodestimationtechniqueandexplorationofthedifferentialrelationbetweentwoconsecutiveOFDMdatasymbolsequencesinfrequencydomain.ItsperformanceiscomparedwiththeconventionalmethodbycomputersimulationsfortheadditivewhiteGaussiannoisechannelandamultipathfadingchannel.Simulationresultsshowthattheperformanceoftheproposedestimatorisbetterthantheconventionalestimator.
简介:Inthispaper,theperfectdyadicbinarysequencepairwithone-valuedyadiccorrelationfunctionsispresented.Thatis,theperfectdyadicbinarysequencepairisaperfectdiscretesignal,foritsdyadicrelativefunctionisδ-function.Thetransformationfeaturesandsomeexistingadmissibilityconditionsofperfectdyadicbinarysequencepairarediscussed,andthepropertiesforthiskindofcodeinWalshtransformationspectrumandweightspectrumarealsoanalyzed.Fromabove,Itisfoundthattheperfectdyadicbinarysequencepaircaneasilydifferentiatefromitsdyadicshifting.Sothesegoodsignalscanusedinengineeringassynchronizationcode,multi-usercodeandsoon.
简介:象在1975一样早,Shamos和Hoey首先给了O(nlgn)-timedivide-and-conquer算法(嘘算法在短)为发现点的最靠近的对的问题。在联合的一个过程,在一些点需要被计算的3n之间的欧几里得距离,计算距离的全面复杂性当时因此是3nlgn。因为距离的计算与另外的基本操作相比是更昂贵的,怎么嘘改善从计算距离的复杂性的方面的算法被考虑。在1998,周,熊和朱由把这复杂性归结为2nlgn改进了SHalgorithm。在这篇论文,我们做进一步的改进。计算距离的Theoverall复杂性被归结为(3nlgn)/2,它仅仅是一半SHalgorithm的。
简介:LetKbearight-continuousandnondecreasingfunction.AfunctionfanalyticintheunitdiskDbelongstothespaceDKifD|f(z)|2K(1-|z|2)dA(z)<∞.DecompositiontheoremsforDKspacesareestablishedinthispaper.Asanapplication,weobtainacharacterizationofinterpolationbyfunctionsinDKspaces.Furthermore,wecharacterizefunctionsinDKspacesbyconjugatepairs.
简介:ThispaperdiscussesproblemIEP:Givenn×mmatrixXandm×mdiagonalmatrixA,findann×nmatrixAsuchthatAX=XA.ThenewsolvablilyconditionsfortheproblemIEPareobtained.TheeigenvaluedislribulaionofthesolutionsfortheproblemIEParedescribedindetail.
简介:Adiscretedifferentialevolutionalgorithmcombinedwiththebranchandboundmethodisdevelopedtosolvetheintegerlinearbilevelprogrammingproblems,inwhichbothupperlevelandlowerlevelvariablesareforcedtobeinteger.Anintegercodingforupperlevelvariablesisadopted,andthenadiscretedifferentialevolutionalgorithmwithanimprovedfeasibility-basedcomparisonisdevelopedtodirectlyexploretheintegersolutionattheupperlevel.Foragivenupperlevelintegervariable,thelowerlevelintegerprogrammingproblemissolvedbytheexistingbranchandboundalgorithmtoobtaintheoptimalintegersolutionatthelowerlevel.Inthesameframeworkofthealgorithm,twootherconstrainthandlingmethods,i.e.thepenaltyfunctionmethodandthefeasibility-basedcomparisonmethodarealsotested.Theexperimentalresultsdemonstratethatthediscretedifferentialevolutionalgorithmwithdifferentconstrainthandlingmethodsiseffectiveinfindingtheglobaloptimalintegersolutions,buttheimprovedconstrainthandlingmethodperformsbetterthantwocomparedconstrainthandlingmethods.
简介:InviewoftheshortcomesofconventionalElectroCardioGram(ECG)compressionalgo-rithms,suchashighcomplexityofoperationanddistortionofreconstructedsignal,anewECGcompressionencodingalgorithmbasedonSetPartitioningInHierarchicalTrees(SPIHT)isbroughtoutafterstudyingtheintegerliftingschemewavelettransformindetail.Theproposedalgorithmmodifieszero-treestructureofSPIHT,establishessingledimensionalwaveletcoefficienttreeofECGsignalsandenhancestheefficiencyofSPIHT-encodingbydistributingbitsrationally,improvingzero-treesetandamelioratingclassifyingmethod.Forthisimprovedalgorithm,floating-pointcom-putationandstorageareleftoutofconsiderationanditiseasytobeimplementedbyhardwareandsoftware.Experimentalresultsprovethatthenewalgorithmhasadmirablefeaturesoflowcomplexity,highspeedandgoodperformanceinsignalreconstruction.Highcompressionratioisobtainedwithhighsignalfidelityaswell.
简介: (1)考查学生对会话活动的兴趣,(3)有54%的学生喜欢与外向性格的同学一组会话,笔者将如何解决低水平学生的搭配与如何解决活动设计问题
简介:教师在做Pair Work时可不必拘泥于让学生固定和谁一起练习,活动时对学生提出不同要求,7. 增加课堂活动的趣味性 帮助差生更好地进行Pair Work 的最终目的是为了更好地提高其语言能力
简介:WiththeaidofMullin-Rota'ssubstitutionrule,weshowthattheSheffertypedifferentialoperatorstogetherwiththedeltaoperatorsDandDcouldbeusedtoconstructapairofexpansionformulasthatimplyawidevarietyofsummationformulasinthediscreteanalysisandcombinatorics.Aconvergencetheoremisestablishedforafruitfulsourceformulathatimpliesmorethan20notedclassicalfomulasandidentitiesasconsequences.Numerousnewformulasarealsopresentedasillustrativeexamples.Finally,itisshownthatakindofliftingprocesscanbeusedtoproducecertainchainsof(∞m)degreeformulasform≥3withm≡1(mod2)andm≡1(mod3),respectively.