简介：and evaluating the success of a particular strategy. They have an executive function. In O’Malley and Chamot framework of learning strategies,Oxford’s taxonomy fails to make a distinction between strategies directed at learning the L2 and those directed at using it (Ellis). The last problem is that compensation strategies are considered as a direct type of learning strategies rather than one type of production strategies,cognitive and social/affective. They grounded the study of learning strategies within the information-processing model of learning developed by Anderson. Metacognitive strategies involve consciously directing one’s efforts into the learning task. These strategies are higher order executive skills that may entail planning learning

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

简介：NineteenL-N-2-hydroxyethylaminoacidsandL-N,N-bis(2-hydroxyethyl)aminoacidswerepreparedfromthereactionofchlorohydrinwithL-alanine,L-valine,L-leucine,L-isoleucine,L-phenylalanine,L-serine,L-thrcunine,L-glutamicacid,L-asparticacidandglycine.L-N,N,N’,N’-tetra(2-hydroxyethyl)cystinewaspreparedbythereactionofL-cystinewithchlorohydrin.

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简介：Peerrevision,asupplementarystrategytoteacherrevisionofwritinginL2classroom,makespassivereceiversofteacherrevisionbecomeactiverevisers,enablingstudentstoinvolveinmoremotivatedlanguagelearning.Benefitsofpeerrevisionanditsimplicationsforteacherandstudentrolesarediscussed.Thisarticlealsotentativelyanalyzeswaysofpreparingstudentsforeffectivepeerrevision.

简介：本文代表着俄罗斯目前对世界新军事革命的看法和对21世纪战争特点的预测，认为所谓“非接触战争”的突出特点是“有选择打击的战争”，这是由以信息技术为核心的各种远程精确打击和精确制导武器的发展所决定的。

简介：在打造新一代数据中心的过程中,把应用系统从昂贵、封闭的UNIX平台迁移到经济、灵活的Linux平台（简称为U2L）,一直是近年来优化IT架构、推进IT变革的一项重要举措。时至今日,随着X86技术的成熟,虚拟化、并行计算及云计算的普及,节能减排呼声的高涨,以及戴尔、英特尔、红帽和VMware等开放技术厂商大力推动,U2L迎来了极好的发展时机，越来越多的企业和机构开始加大U2L力度，以此打造更为经济和高效的数据中心。

简介：ConsiderL2-projectionuhofuton-degreefiniteelementspaceonone-dimensionaluniformgrids.TwodifferentclassesoftheorthogonalexpansioninanelementforconstructingasuperclosetofunctionuhareproposedandthensuperconvergenceforbothuhandDuhareproved.Whennisoddandnoboundaryconditionsareprescribed,thenuhisofsuperconvergenceatn+1orderGausspointsGn+1ineachelement.Whennisevenandfunctionvaluesontheboundaryareprescribed,thenuhisofsuperconvergenceatn+1orderpointsZn+1ineachelement.Iftheotherboundaryconditionsaregiven,thentheconclusionsarevalidinallelementsthatitsdistancefromtheboundary≥ch|lnh|.Theaboveconclusionsarealsovalid.forn-dergreerectangularelementQ1（n）.

简介：面对城市拥挤、环保要求和经济压力,如今的消费者们将油耗作为购车时重要的考量指标。面对这个挑战,雪铁龙给出了令人震撼的答案——仅耗油2L/100km的雪铁龙全新C4CactusAirflow2L概念车在2014巴黎车展上正式亮相。

简介：　　Enantioimericallypure1,l'-bi-2-naphthol(BINOL)1anditsderivativesareimportantchiralligandsandauxiliariesforanumberofasymmetrictransformations1suchasaldolcondensations,alkylations,Diels-Alderreactions,Michaeladditions,epoxidations,etc.Opticallypure1andtheirderivativeshavealsobeenusedextensivelyinchiralrecognition,chiralseparationandintheconstructionoffunctionalisedmaterials2.Furthermore,(R)-and(S)-BINOLarealsofundamentalstartingmaterialsforthesynthesisofalargevarietyofotherchiralbinaphthylssuchasMOP(2c),NOBIN(2d)andBINAP(2e).Asaresultthedevelopmentofefficientandeconomicmethodsforthepreparationofopticallypure1hasattractedmuchattentioninrecentyears3andnovelmethodsfortheresolutionof(±)-1continuetobedeveloped.……

简介：identification and classification of learning strategy. The problems are reviewed concerning the definition and classification of learning strategies and then the paper tentatively introduces Cohen’s approach to defining learning strategies in terms of prototypicality of features of learning strategies.,Cohen’s attempt to describe the prototypicality of strategies is a step forward concerning defining learning strategies. It might reflect the nature of learning strategies to a large extent because the answers to the questionnaire come from strategy experts. It is true that some problems still exist. For example,all-or-nothing feature but in terms of how far along a continuum a feature could possibly go before it stopped being descriptive of a strategy. This is an approach of defining learning strategies in terms of how prototypical the feature was. These features as follows are arranged in a descending order of agreement

简介：10月13日,奥迪Q2L正式上市,共计推出5款车型,售价区间为21.77万~27.9万元。新车长宽高尺寸分别为4236mm、1785mm、1548mm,轴距为2628mm,国产版车型相比海外版本轴距加长了33mm。外观方面,奥迪Q2L采用的大嘴格栅边框棱角分明的风格让其看起来较为个性,同时下保险杠位置采用黑色塑料面板装饰增加了些许越野车硬派的印象。

简介：给定一个图G和2个正整数j和k，图G的一个m－L（j，k）－边标号是从图的边集到非负整数集合｛0，1，…，m｝的一个映射，该映射满足相邻的边所对应的整数相差至少为j，距离为2的边所对应的整数相差至少为k．在图G的所有m－L（j，k）－边标号中，最小的整数m称为图G的L（j，k）－边标号数，记为λ′j，k（G）．项链是一类特殊的Halin图，研究了项链的L（1，2）－边标号，给出了项链的L（1，2）－边标号数的上界和下界，并且此上界和下界都是可达的．

简介：LetAbead×drealexpansivematrix.AnA-dilationParsevalframewaveletisafunctionψ∈L2(Rd),suchthattheset{|detA|n/2ψ(Ant-l):n∈Z,l∈Zd}formsaParsevalframeforL2(R~d).AmeasurablefunctionfiscalledanA-dilationParsevalframewaveletmultiplieriftheinverseFouriertransformoff■isanA-dilationParsevalframewaveletwheneverψisanA-dilationParsevalframewavelet,where■denotestheFouriertransformofψ.Inthispaper,theauthorscompletelycharacterizeallA-dilationParsevalframewaveletmultipliersforanyintegralexpansivematrixAwith|det(A)|=2.Asanapplication,thepath-connectivityofthesetofallA-dilationParsevalframewaveletswithaframeMRAinL2(Rd)isdiscussed.

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简介：We’llstudytheFEMforamodelforcompressiblemiscibledisplacementinporousmediawhichincludesmoleculardiffusionandmechanicaldispersioninone-dimensionalspace.Aclassofvertices-edges-elementsinterpolationoperatorinkisintroduced.Withthehelpofink(notellipticprojection),theoptimalerrorestimateinL∞(J;L2(Ω))normofFEMisproved.

简介：讨论了一类不确定随机时滞系统的鲁棒L2-L∞滤波器设计问题。目的是对于所容许的不确定性和时滞，设计一个稳定线性滤波器，使得滤波误差动态系统是随机渐近稳定的且满足给定的L2-L∞性能要求γ。给出了解决这个问题的充分条件，并且当这些条件满足时，以参数显式化的形式给出了所求的鲁棒L2-L∞滤波器。最后用数值算例验证了结论的可行性和有效性。

简介：ThiscriticalreviewassessesEliHinkel’sresearchpaperTheEffectsofEssayTopicsonModalVerbUsesinL1andL2AcademicWritingintermsofbothwritingprocessandwritingproduct.Itacknowledgesthemeritsaswellastheflawsofthepaperandconcludeswithfuturestudysuggestions.