正文描述:《毕业论文外文翻译-聚类分析—基本概念及算法》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、山东建筑大学毕业论文外文文献及译文外文文献: ClusterAnalysis—BasicConceptsandAlgorithmsClusteranalysisdividesdataintogroups(clusters)thataremeaningful,useful,orboth.Ifmeaningfulgroupsarethegoal,thentheclustersshouldcapturethenaturalstructureofthedata.Insomecases,however,clusteranalysisisonlyausefulstartingpoin
2、tforotherpurposes,suchasdatasummarization.Whetherforunderstandingorutility,clusteranalysishaslongplayedanimportantroleinawidevarietyoffields:psychologyandothersocialsciences,biology,statistics,patternrecognition,informationretrieval,machinelearning,anddatamining.Therehavebeenmanyapplicatio
3、nsofclusteranalysistopracticalproblems.Weprovidesomespecificexamples,organizedbywhetherthepurposeoftheclusteringisunderstandingorutility.ClusteringforUnderstandingClasses,orconceptuallymeaningfulgroupsofobjectsthatsharecommoncharacteristics,playanimportantroleinhowpeopleanalyzeanddescribet
4、heworld.Indeed,humanbeingsareskilledatdividingobjectsintogroups(clustering)andassigningparticularobjectstothesegroups(classification).Forexample,evenrelativelyyoungchildrencanquicklylabeltheobjectsinaphotographasbuildings,vehicles,people,animals,plants,etc.Inthecontextofunderstandingdata,c
5、lustersarepotentialclassesandclusteranalysisisthestudyoftechniquesforautomaticallyfindingclasses.Thefollowingaresomeexamples:Biology.Biologistshavespentmanyyearscreatingataxonomy(hierarchicalclassification)ofalllivingthings:kingdom,phylum,class,order,family,genus,andspecies.Thus,itisperhaps
6、notsurprisingthatmuchoftheearlyworkinclusteranalysissoughttocreateadisciplineofmathematicaltaxonomythatcouldautomaticallyfindsuchclassificationstructures.Morerecently,biologistshaveappliedclusteringtoanalyzethelargeamountsofgeneticinformationthatarenowavailable.Forexample,clusteringhasbeenu
7、sedtofindgroupsofgenesthathavesimilarfunctions.•InformationRetrieval.TheWorldWideWebconsistsofbillionsofWebpages,and-17-山东建筑大学毕业论文外文文献及译文theresultsofaquerytoasearchenginecanreturnthousandsofpages.Clusteringcanbeusedtogroupthesesearchresultsintoasmallnumberofclusters,
显示全部收起