一種改進(jìn)的阻抗張量分解方法及其應(yīng)用.pdf

1、中南大學(xué)碩士學(xué)位論文一種改進(jìn)的阻抗張量分解方法及其應(yīng)用姓名：李偉申請學(xué)位級別：碩士專業(yè)：地球探測與信息技術(shù)指導(dǎo)教師：嚴(yán)家斌20100528ABSTRACTFortheimpedancetensordistortion，resultedbyhorizontalgalvanicheterogeneitynearsurface，itisnecessarytodecomposethedistortedimpedancetensorinorder

2、todescribetrueelectricalstructuralfeatureIfthedistortionoftheimpedancedataisnoteliminated，thecalculatedapparentresistivityandphasemaybewrong，whicheffluenceontheresultofdataprocessingandinterpretationInthisthesis，basedont

3、hedistortedimpedancetensorfeatureof3D／1Dor3D／2Dmodel，wediscussseveraldistortiondecompositionmethodsByanalyzingtheprocessofGBdecompositionmethod，animprovedmethodisintroduced，usingthegeneralizedinversematrixalgorithmtocalc

4、ulateregionalimpedancefromthedatainwhichthedistortionshavebeeneliminatedAcomputerprogramtocarryoutthismethodiSwrittenwithMatlab，succinctandclearByforwardlycalculatingatheoreticalmodelundertheeffluenceofthedistortionfacto

5、rs，wedetecttheerrorofthegeneralizedinversematrixalgorithmandproveittobeeffectiveFinallytheimprovedmethodisappliedintothecalculationofregionalimpedancefromsomegivenmagnetotelluricdata，whichprovedtobepracticalandeffectiveT

6、hemethodintroducedinthisthesisCanbeusedtocalculatethedistortionfactorsTherefore，thequantitativerelationbetweenthedistortionfactorsandregionalimpedancecanbestudiedGainenlargesorreducestheamplitudeoftensorimpedancePrincipa

7、laxisdirectionofStrikeiscompressedandperpendicularaxisisstretchedifanisotropicparameterisapositivevalueOppositelyperpendicularaxisiscompressed，andPrincipalaxisdirectionofStrikeisstretchedTensorimpedancerotatesinclockwise