学科分类
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454 个结果
  • 简介:点点:一个词汇研究的狂热者,也是一个理想主义者。对词汇的来源和发展特别有兴趣,每次有人随便说起一个单词,他总是可以引经据典。他的记忆法掺杂了很多文化和思维的东西,所以经常让大家搞不懂或特崇拜。“毕竟,语言是承载文化的,文化是反映思维的,对吗?所以说到语言,你绝对无法脱开文化,当然还有最后的思维。”你看,点点就是这幺一个固执得有些可爱的人。

  • 标签: 思维 文化 载文 兴趣 单词 记忆法
  • 简介:Adirectnumericalsimulationisperformedon2563gridsfordecayingisotropicturbulence.Thetotalkinematicenergy,Taylormicro-scale,Taylormicro-scaleReynoldsnumberandthevelocityderivativeskewnessarecalculated.Thesnapshotsofenergyspectraandenergytransferspectraareplotted.ThesemeasurementsverifytheDIApredictions:decayingisotropicturbulencehastheenergypropagationandoccupiesthefinaldecayperiods.Theskewnessremainstosomelevelwithsmallvariationeveninthefinaldecayperiod.

  • 标签: 数值模拟 Navior-Stokes方程 流体力学 DIA 动能 势能
  • 简介:Anonlinearage-dependentpopulationmodel,whichallowsforconsiderationoftheeffectsofcrowdingandresourcelimitation,ispresented.Thebasicpropertiesofsolution,suchasexistence,positivity,uniqueness,andultimatebehavior,arediscussed.Also,theconditionofstabilityandcontroll-abilityofthenonlinearpopulationsystemisobtained.

  • 标签: SEMIGROUP EXISTENCE of SOLUTION STABILITY
  • 简介:ROOTversion3(spring2001)supportsautomaticclassschemaevolution.Inadditionthisversionalsoproducesfilesthatareself-describing.Thisisachievedbystoringineachfilearecordwiththedescriptionofallthepersistentclassesinthefile.Beingself-describingguaranteesthatafilecanalwaysbereadlater,itsstructurebrowsedandobjectsinspected.alsowhenthelibrarywiththecompiledcodeoftheseclassesismissingTheschemaevolutionmechanismsupportsthefrequentcasewhenmultipledatasetsgeneratedwithmanydifferentclassversionsmustbeanalyzedinthesamesession.ROOTsupportstheautomaticgenerationofC++codedescribingthedataobjectsinafile.

  • 标签: ROOT 国际物理学家合作 数据处理系统
  • 简介:TwoPhasesofPolicyDesigningInthefirstdaysofRussia’sindependencefromtheformerSovietUnion,itsforeignpolicymainlyaimedestablishingcloselinkswiththeWest,joiningintheranksoftheWesterndevelopedcountriesandgettingridofitseconomicdiffi-cultiesbydependingonmassiveWesterneconomicaid.Itwasconsideredthe“only

  • 标签: Russia INDEPENDENCE establishing LINKS getting RANKS
  • 简介:精索静脉曲张在临床的实践被认出了为在一个世纪。原来,这些过程为疼痛的管理被利用,但是自从1952,修理主要为男不孕的处理。然而,因为pathophysiology不是清楚的,精索静脉曲张的诊断和治疗是争论的,研究的入口标准在中心之中变化了,并且有很少使随机化的临床的试用。不过,临床医生们继续为精索静脉曲张的修正开发技术,基本科学家在精索静脉曲张的pathophysiology上继续调查,并且从未来的使随机化的试用的新结果数据出现在世界的文学。因此,Andrology的亚洲杂志的这个特殊版本被建议报导许多与精索静脉曲张有关的新信息,作为这个工程的特定的部分,现在的文章作为进化的全面评论和校正过程的精炼被开发。

  • 标签: antegrade 硬化 laparoscopic varicocelectomy microsurgical varicocelectomy 经皮的 embolization VARICOCELECTOMY
  • 简介:MicroRNAs(miRNAs)是他们在植物和动物的目标基因的重要post-transcriptional管理者。miRNAs通常长是20-24核苷酸。尽管有他们的不平常地小的尺寸,miRNA基因家庭的进化历史似乎类似于编码theirprotein对应物。与在动物染色体的小却丰富的miRNA家庭相对照,植物有少数但是更大的miRNA基因家庭。植物miRNA基因家庭的成员经常是高度类似的,建议经由双人脚踏车基因复制和部分复制事件的最近的扩大。尽管许多miRNA基因越过植物种类被保存,一样的基因家庭在不同种类在尺寸和genomic组织显著地变化,它可以在目标基因规定引起剂量效果和空间、时间的差别。在这评论,我们在理解植物miRNA基因家庭的进化总结当前的进步。

  • 标签: 植物 miRNA基因家族 演化 转录后调节 串联复制 片段复制
  • 简介:Today,thedisplayedcontentsanddecorationsshowinginciviliandwellingsofethnicTibetanshassurpassedfarawayfromtheoriginalandtraditionalappearance.Nomorearetheycagedinfixedandrigidtraditionalstoneandwoodstructureswithwhitewalls.

  • 标签: displayed showing walls
  • 简介:Supernovaexplosionisapeculiarastronomicalphenomenon,whichhasarousedgreatinterestandextensiveresearchbyastronomers.Atpresent,however,itiserroneouslybelievedthatthesupernovaexplosionisasplendidfuneralofadyingstar.Infact,newastronomicalobservationsandtheauthor’stheoreticalstudieshaveshownthatintheprocessofastar’snever-endingevolution,numeroussupernovaexplosionsmayoccur,andsupernovaexplosionwillrunthroughmanystagesofstellarevolution.Whenevertheatmosphereofthestarbecomesverydenseanditssurfaceiscoveredwithathicklayerofmaterialagain,athermonuclearreactioncanbeignitedagain,causingasupernovaexplosion.Especially,whenthestarhasundergoneanumberofsupernovaeexplosionsanditssurfaceiscoveredwithmultiplelayersofsupernovaexplosionremnants,thecoreofthemassivestarmayundergosuddengravitationalcollapse,causingaviolentsupernova;whenastarisimpactedbyafallingcelestialbody,italsoproducesviolentsupernovaexplosions.

  • 标签: STELLAR EVOLUTION GALAXY SUPERNOVA explosions
  • 简介:<正>Q编辑同志:你们好,我接触贵刊的时间不长,但是我非常喜欢汽车,对你们的杂志也比较满意,能从这儿学到许多有用的知识,也想通过“Q&A信箱”来提出我的问题和建议,来满足我对汽车知识的求知欲。我想请教几个问题:1、国内是否有三菱EvolutionⅦ卖,大概多少钱?2、国产的陆地巡洋舰与进口的陆地巡洋舰有没有不同之外?3、我喜欢宝马520i,能否给我寄回几张BMW520i的图片及有关

  • 标签: 陆地巡洋舰 斯巴鲁 EVOLUTION 四驱系统 四轮 平民百姓
  • 简介:Inthepast,peopledidnotrealizetheformationandstructureofgalaxies.Theyevenmistooktheblackholeshiddeninthecenterofagalaxyasindependentcelestialobjects,makingblackholesmysteriousandunbelievable.Itwasonlyaftertheauthorstudiedanddiscoveredthelawsoftheformationandevolutionofsatellites,planetsandstarsthatheputforwardthescientifictheoryofgalaxyformationandevolution,thereforerevealingthehierarchicalstructureofgalaxyandtheexistenceandcharacteristicsofblackholesasthemainnodesofgalacticstructure.

  • 标签: GALACTIC structure GALAXY FORMATION GALAXY EVOLUTION