学科分类
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76 个结果
  • 简介:AIM:Toidentifythe100mostcitedpapersincataractsurgery,weperformedacomprehensivebibliometricanalysisbasingontheliteraturesearchontheThomsonReutersWebofKnowledge.METHODS:Thenumberofcitations,includingthetotalcitations,latest5ycitationsandaveragecitationnumberperyear(ACY),authorship,yearofpublication,majortopics,journalofpublication,countryandinstitutionoforiginofeachpaperwererecordedandthenanalyzed.Pearson'scorrelationanalysiswasconductedtoevaluatethecorrelationbetweenthepublishedyearandthenumberofcitations.Thecorrelationbetweenjournal'simpactfactor(IF)andnumberofcitationswasassessedaswell.RESULTS:ThemostcitedpaperwastheclassicpaperdonebytheEuropeanSocietyofCataract&RefractiveSurgeons(ESCRS)group.Thispaperfocusedonthetopicofendophthalmitis.NotonlythemostcitedpapersoriginatedfromtheUSA,butalsosomeAmericaninstitutionslikeJohnsHopkinsUniversity,HarvardMedicalSchool,etc.hadthemostcitations.Pearson'scorrelationanalysisindicatedthatthelatest5ycitationsandACYweresignificantlyrelatedwiththepublishedyear(5ycitations:r=0.615,P<0.001;ACY:r=0.657,P<0.001),whereasnoassociationbetweenthetotalnumberofcitationsandpublishedyearwasfound(r=0.045).Moreover,theIFsofjournalswerefoundtohavenosignificanteffectonthenumberoftotalcitations.CONCLUSION:Toourknowledge,thisisthefirststudyonthemostinfluentialpapersincataractsurgeryafteracomprehensiveresearchofrelevantliteratures.Thepresentworkmayprovideusconciseinformationconcerningthedevelopmenthistoryofcataractsurgeryoverthepast66y.

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  • 简介:rules.' ,business.I ,managers.The 

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  • 简介:Technologicaladvanceshaveincreasedtheprevalenceofsedentarybehaviors,asphysicalinactivityhasbecomeoneoftheleadingriskfactorsofdeathworldwide;asituationthatburdensthehealthcaresystemwithpreventablehealthdisorders.1Increasedincidenceofdiseasedecreasethequalityoflife,evenamongchildren,becausediseasesthatformerlyonsetduringadulthoodarenowimpactingpeopleearlyintheirlives,aswellasattheendoftheirlives,"bycumulativedamageovertimeorbythebiologicalembeddingofadversitiesduringsensitivedevelopmentalperiods"(p.1).2

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  • 简介:Amethodofenhancingpowersystemstabilityforasinglemachinetoinfinitebuspowersystemispresented.ThetechniqueusedcompromisestheeffectivenessofProportional-Integral-Derivativecontroller(PID).Inordertosatisfythedampingcharacteristicsfortheproposedpowersystemoverawiderangeofoperatinginterval,rotationalspeed,torqueangleandterminalvoltagesignalsofthesynchronousmachineareutilizedascontrolsignalsofthesystem.Itiswellknownthatthesevariableshavesignificanteffectsondampingthegeneratorsshaftmechanicaloscillations,it'llbesoeasytovalidatethemostsuitablecontrollerasseenfromthesimulationresults.

  • 标签: 电力系统稳定器 动态稳定性 比例积分微分控制器 电力系统稳定性 PID控制器 控制信号系统
  • 简介:the masculinity/femininity from different culture and background in order to maximize the team power is worth considering by managers.The above four dimensions illuminated the most important cultural differences that affect on business. International managers should be able to aware not only the cultural difference but also the intercultural communication.Gudykunst and Kim (1992,the international managers must pay attention to the clashes and be aware of. How to work the subordinates together efficiently and more cooperatively is important too.And then there is also a large discrepancy on the uncertainty avoidance. (Hoecklin,the power distance can be viewed as the subordinates respect the superiors.That is the corporate culture in orient. Let us take a look at the western way. It is not a whole converse phenomenon. There is 'the Eiffel Tower culture' (Trompernaars

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  • 简介:Inthispaper,byvirtueofthecombinatorialoptimizationandgrouptestingmethodand,withascalewithoutweight,wedetectncoinscontainingatmostoneabnormal.Thencoinsareindistinguishableonlybytheirappearances.Wederiveanoptimalprocedureofdeterminingwhetherallthenballsarenormalornotandinthelattercase,ourprocedure(algorithm)alsotellswhethertheabnormalweighsmoreorweighslessthaneachofthenormals.Theoptimalalgorithmobtainedinthispaperisconstructive.

  • 标签: 数学比例 最佳组合 数学感应 群检验 硬币
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  • 简介:AccordingtotheThomsonReuterreporton20June2013,the2012ImpactFactorofJournalofNaturalGasChemistry,renamedasJournalofEnergyChemistryin2013,is1.405,whichranksfirstamongchemistryjournalsinChina.WewouldliketoexpressourappreciationtoalltheauthorswhohavecontributedtheirgoodworktotheJournal.Thefollowingisthelistofthearticlespublishedin2010and2011whichreceivedthemostcitationsandthuscontributedthemosttothenewimpactfactor.

  • 标签: 化学期刊 天然气 作者 中国 引文 影响因子
  • 简介:they can get more experience cause they like challenge. I believe that the divergence of the uncertainty avoidance is from different basic social ideology. A competent manager should pay attention on the rules setting between different uncertainty avoidance. The misreading of that may affect the initiative and the aspiration of the subordinates.The third dimension Hofstede indicated is the individualism. It is a concern for yourself as an individual as opposed to concern for the group. The priority of self-concern or group-concern varies from different cultures. For example,31) defined 'Uncertainty avoidance is the lack of tolerance for ambiguity and the need for formal rules.' That means people trying to setup rules to face to the uncertainty. The re is high uncertainty avoidance in most oriental countries such as Japan,most western employees like to work with their own plan for defending their interest. That is a high individualism. Because of the different attitude to work

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  • 简介:time and space concept. The conclusion is different cultures do cause problems in business. We cannot change or solve the cultural difference. To avoid misunderstanding,The above four dimensions illuminated the most important cultural differences that affect on business. International managers should be able to aware not only the cultural difference but also the intercultural communication.Gudykunst and Kim (1992,called 'the use of time'. The American and Northern European have a linear time concept. These societies are referred to as Time-Bound societies. Southern Europeans and Arabs regard time in a linear way but more things they can do or handle at the same time. That can be called 'multi-active time'. And then there is the Asian view of time

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  • 简介:Understanding Cultural Diversity in Business. London,Sage Publications.Trompenaars F. (1993). Riding the Waves of Culture,The Economist Books. Trompenaars F. and Hampden-Turner C. (1997). Riding the Waves of Culture

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  • 简介:the power distance can be viewed as the subordinates respect the superiors.That is the corporate culture in orient. Let us take a look at the western way. It is not a whole converse phenomenon. There is 'the Eiffel Tower culture' (Trompernaars,which is a low power distance. In the lower power distance,power distance is also associated with 'the family culture' (Trompernaars

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  • 简介:InSeptember,Beijinghadembracedcoolwindandattractivesceneryafteralonghotsummer.AttheinvitationofCAFIU,Mr.ErnstKerbusch,DirectoroftheDepartmentforInternationalDevelopmentCooperationofGermany'sFriedrich-EbertFoundation(FES)andMr.RolandFeicht,newlyappointedresidentrepresentativeinBeijingvisitedBeijing.

  • 标签: CAFIU 中国国际交流协会 改革 对外经济关系 友谊 双边合作
  • 简介:epigenetic修正的一个改变的模式例如DNAmethylation和histone修正,对许多普通人的疾病批评,包括癌症。最近,mitochondrialDNA(mtDNA)被报导通过methylation模式的epigenetic规定与tumorigenesis被联系。学习DNAmethylation和CpG岛(CGI)的有希望的途径之一正在定序,克隆的分析源于methyl-CpG-binding领域蛋白质和限制酶MseI产生的物理库。在这研究,我们观察到在一个人的CGI库的349克隆的最冗余的序列都从人的mitochondrial染色体被产生。进一步的分析显示从mtDNA有5,845-bpDNA转移到染色体1,并且所有克隆应该是510-bpMseI碎片的产品,它包含了270bp的通常认为的CGI。510-bp碎片作为细胞色素coxidase子单元II(COXII)的部分被注解,并且包含COXII的相应序列的种系发生的分析从mtDNA显示出三个DNA转移事件到原子染色体,其一个经历了在不同染色体之间的第二等的转移事件。这些结果可以推进我们mtDNA怎么在原子核调整DNAmethylation的理解。

  • 标签: 线粒体基因组 CPG岛 同源序列 图书馆 DNA甲基化 线粒体DNA
  • 简介:看看最新评选出的2004年度最酷发明吧.所有这些发明都会让你在惊异之余慨叹人类的伟大并产生对未来美好的憧憬。但是这些发明离我们究竟还有多远呢?

  • 标签: 科技发明 美好 评选 未来 产生 人类
  • 简介:TheJinlongdingziactivevolcanoeruptedbefore1600a,anditisthelatestbasalticexplosivevolcanoatLonggangVolcano.ItsvolcanicproductsincludetheJinlongdingziVolcaniccone(elevation999.4m),thelavaflowandthewidely-spreadvolcanicpyroclasticsheet(sihaiPyroclasticSheet),JinlongdingzivolcanicrocksaretrachybasaltswithverysimilarREEpatternsandincompatibleelementpatterns,andtheir87Sr/86Srand143Nd/144Ndratiosrangefrom0.704846ot0.704921andfrom0.512619to0.512646,respectively.Itisrevealedthatthetrachybasalthasthecharacterofprimarymagmaderiveddirectlyfrommantlesourceswithverylittleevolutionandcrustcontaminationduringitsascending.TheyoungermantlexenolithsdemonstratethatthemantlesourceoftheJinlongdingziVolcaoishydrous,withrelativelylowtemperature.

  • 标签: 岩石学 地球化学 火山爆发 火山活动性