基于独立分量分析的地质体检测方法研究

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1、ResearchofMethodinDetectionofGeologicalBodiesBasedonIndependentComponentAnalysisWangYan(GeophysicalProspectingandInformationTechnology)DirectedbyProf．WangYonggangAbstractIndependentComponentAnalysis(ICA)isaccompaniedwiththedevelopedofblindsourceseparationtechniqueinrecentyears，isthego

2、alofmultidimensionalsignalprocessingtechnology．ICAtechnologyisthetheoreticalbasisofhigherordersignalstatistics，astheprincipleofstatisticalindependenceoftheobserveddatasettobetheobjectivefunction，andbyselectingtheappropriatealgorithmtostrikeaseparatematrix．Thetargetdataseparatedintosev

3、eralcomponentsindependentlyofeachother,andultimatelyachievingthedataminingcomponentofthepurposeimplied．WiththetheoreticalsystemofICAtechnologyconstantlyupdatedandimproved，themethodhasbeenwidelyusedingeophysicsandachievedgoodresults．Thisarticlebased0nthebasicalgorithmofICA，appliedtheIC

4、Atechnologyintothefieldofgeophysics,mainlyintwoaspects：thefirst，applicatedtheICAtechnologytosuppressrandomnoiseinseismicdata；thesecond，appliedtheICAtechnologytooptimizetheuseofseismicattributes．Thespecificcontentofthispaperisasfollows：Firstofall，discussesthemathematicalfoundationsandb

5、asictheoryoftheICAtechniques，basedonthediscussionofprobability,informationtheory,etc．onthebasisofmathematicalknowledgewhichiscloselyrelated淅tllICA，abriefofanalysisoftheoriginfortheICAproblem、mathematicalmodelanduncertainty．Atthesametime，alsodiscussedthedefinitionofICAtechnologyindepen

6、dence，andmetric．Secondly,highlightstheWell—knownICAFast—ICAalgorithm，andhaveadetaileddiscussionofthebasicprincipleofthealgorithmandcharacteristics．Inaddition，JADEalgorithmprinciplearebrieflydiscussed．IntroducedtwodifferentwaysofICAseparationresultsofmetric．Waytomodeltestmeasurestheoft

7、hedifferentobjectivefunctionsoftheFast-ICAalgorithmandtheseparationperformanceofJADEalgorithm．Finally,theICAtechniqueusedingeophysicalresearch．InthemodeltestbasedontheapplicationofICAtechniquestosuppresstheactualseismicdata(includingpre’stack,post-stack)ofrandomnoise．Ontlleotherhand，i

8、nview