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  本文关键词：广域电磁法一维正反演，由笔耕文化传播整理发布。

网友ds6573近日为您收集整理了关于广域电磁法一维正反演的文档，，希望对您的工作和学习有所帮助。以下是文档介绍：分类号U D C密级编号十I轫大学CENTRAL SOUTH UNIVERSITY硕士学位论文论文题目.…………庄撼鱼确陆=维:垂羼演…………学科、专业:………….鸦封釜壤:测:复焦!壑揍本………….研究生姓名:…………………一金蠹盎…………………~导师姓名及专业技术职务…….何缝差一院士…蕊攫…封熬攮………原创性声明肿ill lJrl!Iif/lll llfll Ifl f FIllY1 720548本人声明,所呈交的学位论文是本人在导师指导下进行的研究工作及取得的研究成果。尽我所知,除了论文中特别加以标注和致谢的地方外,论文中不包含其他人已经发表或撰写过的研究成果,也不包含为获得中南大学或其他单位的学位或证书而使用过的材料。与我共同工作的同志对本研究所作的贡献均已在论文中作了明确的说明。作者签名:堡学位论文版权使用授权书本人了解中南大学有关保留、使用学位论文的规定,即:学校有权保留学位论文并根据国家或湖南省有关部门规定送交学位论文,允许学位论文被查阅和借阅;学校可以公布学位论文的全部或部分内容,可以采用复印、缩印或其它手段保存学位论文。同时授权中国科学技术信息研究所将本学位论文收录(来源：[])到《中国学位论文全文数据库》,并通过网络向社会公众提供信息服务。作者虢堡新签丞幽日趔蛑上麟日摘要广域电磁法(WFEM)是中南大学何继善院士最近提出的一种新的人工源频率域电磁测深法。该方法基于双极源电磁场表达式,计算出精确的广域视电阻率;可以在广大的、不局限远区的区域进行观测,同等收发距上增大勘探深度;尤其是只需要测量一个场分量(电分量或磁分量)和同时测量多个频率,从而提高了相对精度和工作效率。本文采用基于高斯克龙罗德正交法则的全局自适应积分方式将偶极场表达式沿长接地导线积分,从而获得双极源场,在此基础上采用逆样条插值法对广域视电阻率进行计算,并与卡尼亚视电阻率进行对比分析,同时对电场总场与电场水平分量计算的视电阻率进行了分析对比。进一步对双极源与偶极源的场进行定量对比,计算了非偶极效应的误差范围,并分析了两种场源的差异性。在一维正演的基础上,采用一种收敛速度快、反演精度高的最小二乘反演方法对基于双极源电场计算的广域视电阻率进行反演,由于基于双极源场的视电阻率更能准确地反映过渡带和近区地电断面(来源：[])电性的垂向变化,不用进行近区和过渡区校正,避免了校正带来的误差,提高了反演精度。论文获得国家自然基金项目:广域电磁测深仪的基础研究(40827002)的资助。关键词广域电磁法,非偶极效应,最4,-乘反演ABSTRACTWide field ic method(WFEM).which is introduced byAcademician Jishan He in Central South University,iS a new controlledsourcesounding method in frequency domain.Based on the bipolarsource field expression,the accurate wide field apparent resistivity hasbeen calculated.For the observations can be conducted in wide field.notlimited to the far f(来源：[])ield.the exploration depth iS increase with the sametransceiver distance.Particularly,we only measure ponent of thefield(electric ponent ic ponent)of thecontrolled source and make the measurement of multiple frequencies atthe same time.Thereby the relative accuracy and efficiency are increased.The bipolar source field has been obtained by the integral of dipolesource field expression along the long grounding wire using agloballyadaptive scheme base(来源：[])d on Gauss.Kronrod rules,and the wide fieldapparent resistivity has been calculated by the inverse spline interpolation,then parison of cagniard apparent has been carried out.Furthermore the apparent resistivity calculated by the electric ponent and the total electric field were analyzed pared.Taking parison to the bipolar source anddipole source field,the errorrange of non·dipole effects has beencalculated.Based on the one-dimensional forward.usin(来源：[])g a fast convergence uracy least squares inversion method to make Inversion of thewide field apparent resistivity calculated based on the bipolar source field.As the electrical vertical changes of the geoelectric section can bereflected by the bipolar source wide field resistivity in the transition zoneand neaL i.e.the near and transition zone correction iS unnecessary,thenthe error

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  本文关键词：广域电磁法一维正反演，由笔耕文化传播整理发布。