Article(id=1322566845706645772, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322566845215912204, articleNumber=null, orderNo=null, doi=10.14075/j.jgg.2025.03.072, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1741536000000, receivedDateStr=2025-03-10, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793254108119, onlineDateStr=2026-10-29, pubDate=1771084800000, pubDateStr=2026-02-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793254108119, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793254108119, creator=13701087609, updateTime=1793254108119, updator=13701087609, issue=Issue{id=1322566845215912204, tenantId=1146029695717560320, journalId=1281212831689347082, year='2026', volume='46', issue='2', pageStart='139', pageEnd='261', issueExtLink='null', onlineDate='null', pubDate='1771084800000', pubDateStr='2026-02-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793254108003, creator='13701087609', updateTime=1793254108003, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=244, endPage=255, ext={EN=ArticleExt(id=1322566845899583757, articleId=1322566845706645772, tenantId=1146029695717560320, journalId=1281212831689347082, language=EN, title=Gravity Frequency Domain Continuation Methods and Error Factors, columnId=null, journalTitle=Journal of Geodesy and Geodynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
For the downward continuation method of gravity field, the frequency domain continuation method has different requirements for data noise and continuation distance, and there is no clear conclusion yet. This paper analyzes seven frequency domain downward continuation methods, including Milne method, Taylor series expansion method, integral iteration method, Tikhonov regularization method, CGNR method, iterative least squares method, and Landweber iterative method. The model was tested using simulation data and aviation measured data, and the results were compared and studied. The results show that the Milne method and the Taylor series expansion method can be used for continuation of point distances less than 14 times under noise-free conditions; the integral iteration method has better stability when continuation of point distances 1 to 20 times without noise, but is more sensitive to noise; the Tikhonov regularization method has significant advantages when it contains noise and is greater than 5 times of point distances, and can obtain higher accuracy; the CGNR method, iterative least squares method and Landweber iterative method have wide applicability, and can maintain high accuracy when continuation of point distances 1 to 20 times under different noise conditions. Among them, the noise resistance of the Landweber iterative method is the most outstanding, and the latter four methods show certain advantages in actual data experiments, and can obtain stable downtime results.
, authors=Huaikui GUAN
1, 2, Yun XIAO
2, 3, *, Feilong REN
4, Han WANG
1, 2, Weixuan SUN
1, 2, authorsList=Huaikui GUAN, Yun XIAO, Feilong REN, Han WANG, Weixuan SUN, authorCompany=null, correspAuthors=Yun XIAO, authorNote=null, correspAuthorsNote=null, copyrightStatement=
All rights reserved. Unauthorized reproduction is prohibited., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322566850836279598, articleId=1322566845706645772, tenantId=1146029695717560320, journalId=1281212831689347082, language=CN, title=重力场频率域延拓方法分析及误差因素研究, columnId=1281909276545356011, journalTitle=大地测量与地球动力学, columnName=大地测量学, runingTitle=null, highlight=null, articleAbstract=
基于重力场各向下延拓方法采用频率域延拓对数据噪声和延拓距离有不同的要求, 且尚未有较明确的结论, 分析了Milne法、泰勒级数展开法、积分迭代法、Tikhonov正则化法、CGNR法、迭代最小二乘法、Landweber迭代法共7种的频率域向下延拓方法, 利用仿真数据和航空实测数据进行模型检验, 并对结果进行对比研究。结果表明, Milne法及泰勒级数展开法可用于无噪声条件下小于14倍点距的延拓; 积分迭代法在无噪声1~20倍点距延拓时稳定性较好, 但对噪声较为敏感; Tikhonov正则化法在含噪声且大于5倍点距的情况下优势显著, 可获得较高精度的下延结果; CGNR法、迭代最小二乘法和Landweber迭代法具有较广的适用性, 在不同噪声条件下进行1~20倍点距延拓时均能保持较高精度, 其中Landweber迭代法的抗噪性能最为突出, 且后4种方法在实测数据实验中表现出一定的优势, 能得到稳定的下延结果。
, authors=关怀魁
1, 2, 肖云
2, 3, *, 任飞龙
4, 王翰
1, 2, 孙玮萱
1, 2, authorsList=关怀魁, 肖云, 任飞龙, 王翰, 孙玮萱, authorCompany=null, correspAuthors=肖云, authorNote=
, correspAuthorsNote=
, copyrightStatement=
版权所有,未经授权,不得转载。, copyrightOwner=大地测量与地球动力学编辑部, extLink=null, articleAbsUrl=null, sourceXml=wZ9MrWaeAZ2uZgWVx32Nng==, magXml=QHGuLvycWFQcn3NLYkCiyw==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=MJpbZqOkbe8xO7Z2ZdLKYA==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=ukrkEdpL1b9CPA9o6lVotg==, mapNumber=null, fund=null)}, authors=[Author(id=1322566851914215741, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=2177585853@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322566852006490432, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, authorId=1322566851914215741, language=EN, stringName=Huaikui GUAN, firstName=Huaikui, middleName=null, lastName=GUAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
2 State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322566852094570817, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, authorId=1322566851914215741, language=CN, stringName=关怀魁, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=1 长安大学地质工程与测绘学院, 西安, 710054
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关怀魁, 硕士生, 主要研究方向为水下重力延拓, E-mail: 2177585853@qq.com
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关怀魁, 硕士生, 主要研究方向为水下重力延拓, E-mail: 2177585853@qq.com
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1, 2, address=1 长安大学地质工程与测绘学院, 西安, 710054
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15 (5): 2001- 2008, articleTitle=An Improved Stable Downward Continuation of Potential Fields Using a Truncated Taylor Series and Regularized Vertical Derivatives Method, refAbstract=null), Reference(id=1322566879168803258, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, doi=null, pmid=null, pmcid=null, year=2023, volume=43, issue=6, pageStart=587, pageEnd=592, url=null, language=null, rfNumber=17, rfOrder=29, authorNames=邓伟, 宋迎春, 谢雪梅, journalName=大地测量与地球动力学, refType=null, unstructuredReference=邓伟, 宋迎春, 谢雪梅. 基于GCV的迭代Tikhonov正则化在测绘中的应用[J].
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43 (6): 587- 592, articleTitle=基于GCV的迭代Tikhonov正则化在测绘中的应用, refAbstract=null), Reference(id=1322566879240106427, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, doi=null, pmid=null, pmcid=null, year=2023, volume=43, issue=6, pageStart=587, pageEnd=592, url=null, language=null, rfNumber=17, rfOrder=30, authorNames=Deng Wei, Song Yingchun, Xie Xuemei, journalName=null, refType=null, unstructuredReference=
Deng Wei ,
Song Yingchun ,
Xie Xuemei . Application of Iterative Tikhonov Regularization Based on GCV in Surveying and Mapping[J]. Journal of Geodesy and Geodynamics,
2023,
43 (6): 587- 592, articleTitle=null, refAbstract=null)], funds=[Fund(id=1322566873913340313, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, awardId=2021YFB3900604, language=CN, fundingSource=国家重点研发计划(2021YFB3900604), fundOrder=null, country=null), Fund(id=1322566873984643482, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, awardId=300103725040, language=CN, fundingSource=长安大学研究生科研创新实践项目(300103725040), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1322566851293458735, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, xref=null, ext=[AuthorCompanyExt(id=1322566851306041648, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851293458735, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China), AuthorCompanyExt(id=1322566851335401777, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851293458735, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 长安大学地质工程与测绘学院, 西安, 710054)]), AuthorCompany(id=1322566851444453682, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, xref=null, ext=[AuthorCompanyExt(id=1322566851465425203, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851444453682, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China), AuthorCompanyExt(id=1322566851486396724, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851444453682, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 地理信息工程国家重点实验室, 西安, 710054)]), AuthorCompany(id=1322566851578671413, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, xref=null, ext=[AuthorCompanyExt(id=1322566851587060022, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851578671413, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3 Xi'an Institute of Surveying and Mapping, Xi'an 710054, China), AuthorCompanyExt(id=1322566851603837239, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851578671413, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3 西安测绘研究所, 西安, 710054)]), AuthorCompany(id=1322566851717083448, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, xref=null, ext=[AuthorCompanyExt(id=1322566851742249274, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851717083448, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4 Xi'an Aerospace Remote Sensing Data Technology Corporation, Xi'an 710100, China), AuthorCompanyExt(id=1322566851767415099, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, companyId=1322566851717083448, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4 西安航天天绘数据技术有限公司, 西安, 710100)])], figs=[ArticleFig(id=1322566855882027363, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 1, caption=
Noise-free error curve with point distance of each method, figureFileSmall=gtGGD8M0ZTfj7x5dXLL02A==, figureFileBig=MJpbZqOkbe8xO7Z2ZdLKYA==, tableContent=null), ArticleFig(id=1322566855965913444, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图1, caption=
各方法无噪声误差随点距变化曲线, figureFileSmall=gtGGD8M0ZTfj7x5dXLL02A==, figureFileBig=MJpbZqOkbe8xO7Z2ZdLKYA==, tableContent=null), ArticleFig(id=1322566856444064101, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 2, caption=
Contour plot of theoretical simulation, figureFileSmall=lND8pWcZIZCCKdkygkQbyw==, figureFileBig=Unj5cx8VhLmipIyCkwaSKA==, tableContent=null), ArticleFig(id=1322566856548921702, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图2, caption=
理论模拟等值线分布, figureFileSmall=lND8pWcZIZCCKdkygkQbyw==, figureFileBig=Unj5cx8VhLmipIyCkwaSKA==, tableContent=null), ArticleFig(id=1322566856787997031, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 3, caption=
Noiseless downward continuation 10 times point distance contour plot, figureFileSmall=KmALwNqFBV57Tqd4abagJQ==, figureFileBig=2psrhnA3YwtF/WMKmHXlvw==, tableContent=null), ArticleFig(id=1322566857152901480, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图3, caption=
无噪声向下延拓10倍点距等值线分布, figureFileSmall=KmALwNqFBV57Tqd4abagJQ==, figureFileBig=2psrhnA3YwtF/WMKmHXlvw==, tableContent=null), ArticleFig(id=1322566858830623082, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 4, caption=
Noiseless downward continuation 10 times point distance residual plot, figureFileSmall=PgWy6wKvMUiKE33JB153SQ==, figureFileBig=kWxjDtknFn3wbnwz5byheA==, tableContent=null), ArticleFig(id=1322566859644318059, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图4, caption=
无噪声向下延拓10倍点距残差分布, figureFileSmall=PgWy6wKvMUiKE33JB153SQ==, figureFileBig=kWxjDtknFn3wbnwz5byheA==, tableContent=null), ArticleFig(id=1322566860118274412, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 5, caption=
Noiseless downward continuation 20 times point distance contour plot, figureFileSmall=usW65ietgiFBckIHZz2+yA==, figureFileBig=ADj8SdizltBQF7sdfT8TyA==, tableContent=null), ArticleFig(id=1322566860571259245, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图5, caption=
无噪声向下延拓20倍点距等值线分布, figureFileSmall=usW65ietgiFBckIHZz2+yA==, figureFileBig=ADj8SdizltBQF7sdfT8TyA==, tableContent=null), ArticleFig(id=1322566860990689646, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 6, caption=
Noiseless downward continuation 20 times point distance residual plot, figureFileSmall=mDDjtF9YjxGjqvlkAAvqSA==, figureFileBig=3x5HinMgLfsRY4XTAy0Mkg==, tableContent=null), ArticleFig(id=1322566861355594095, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图6, caption=
无噪声向下延拓20倍点距残差分布, figureFileSmall=mDDjtF9YjxGjqvlkAAvqSA==, figureFileBig=3x5HinMgLfsRY4XTAy0Mkg==, tableContent=null), ArticleFig(id=1322566861787607409, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 7, caption=
The error varies with point distance under different noise conditions of each method, figureFileSmall=amKwvg14+AaS7mauPZ673w==, figureFileBig=uw9EXODpGOJjnB5tOecy1A==, tableContent=null), ArticleFig(id=1322566863444357491, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图7, caption=
各方法不同噪声条件下误差随点距变化, figureFileSmall=amKwvg14+AaS7mauPZ673w==, figureFileBig=uw9EXODpGOJjnB5tOecy1A==, tableContent=null), ArticleFig(id=1322566863863787892, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 8, caption=
The errors of each method change with point distance under the same noise conditions, figureFileSmall=PYOi1UQma/aJCWUZ/8onPA==, figureFileBig=qyf1QMraI8v3/hX6cqDDlw==, tableContent=null), ArticleFig(id=1322566863968645493, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图8, caption=
同噪声条件下各方法误差随点距变化, figureFileSmall=PYOi1UQma/aJCWUZ/8onPA==, figureFileBig=qyf1QMraI8v3/hX6cqDDlw==, tableContent=null), ArticleFig(id=1322566864329355638, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 9, caption=
2 km theoretical contour plot with 5% noise, figureFileSmall=vc7RmtS5JiD/L9+w9KX1jg==, figureFileBig=QZkuGuwaD/SckjU5PLGyYw==, tableContent=null), ArticleFig(id=1322566864681677176, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图9, caption=
5%噪声条件下2 km理论等值线分布, figureFileSmall=vc7RmtS5JiD/L9+w9KX1jg==, figureFileBig=QZkuGuwaD/SckjU5PLGyYw==, tableContent=null), ArticleFig(id=1322566864757174649, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 10, caption=
5% noise downward continuation 10 times point distance contour plot, figureFileSmall=/J5VOaKAVxQp2Xfmvl5o1Q==, figureFileBig=9pLPRtMzGEUPrkI2qf8KXw==, tableContent=null), ArticleFig(id=1322566864820089210, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图10, caption=
5%噪声向下延拓10倍点距等值线分布, figureFileSmall=/J5VOaKAVxQp2Xfmvl5o1Q==, figureFileBig=9pLPRtMzGEUPrkI2qf8KXw==, tableContent=null), ArticleFig(id=1322566865134662011, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 11, caption=
5% noise downward continuation 10 times point distance residual plot, figureFileSmall=jz7wl3Le8weA65bricjbsg==, figureFileBig=GCxTOCMQlf7/GVRgAKd/cQ==, tableContent=null), ArticleFig(id=1322566865214353788, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图11, caption=
5%噪声向下延拓10倍点距残差分布, figureFileSmall=jz7wl3Le8weA65bricjbsg==, figureFileBig=GCxTOCMQlf7/GVRgAKd/cQ==, tableContent=null), ArticleFig(id=1322566865503760765, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 12, caption=
5% noise downward continuation 20 times point distance contour plot, figureFileSmall=IOq2gggrfL/Ja9Ldq28OeA==, figureFileBig=DE6QSQxD7JB1vtaR6IBfrA==, tableContent=null), ArticleFig(id=1322566865575063934, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图12, caption=
5%噪声向下延拓20倍点距等值线分布, figureFileSmall=IOq2gggrfL/Ja9Ldq28OeA==, figureFileBig=DE6QSQxD7JB1vtaR6IBfrA==, tableContent=null), ArticleFig(id=1322566865956745599, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 13, caption=
5% noise downward continuation 20 times point distance residual plot, figureFileSmall=wlLrXYHDUFrcMOZQojiVyQ==, figureFileBig=uHveTExgRip9Jf863gYjLQ==, tableContent=null), ArticleFig(id=1322566866044825984, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图13, caption=
5%噪声向下延拓20倍点距残差分布, figureFileSmall=wlLrXYHDUFrcMOZQojiVyQ==, figureFileBig=uHveTExgRip9Jf863gYjLQ==, tableContent=null), ArticleFig(id=1322566867697381761, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 14, caption=
Airborne measured gravity data and upward continuation contour plot, figureFileSmall=ggJamgd35NnV4hH5ovynaw==, figureFileBig=GQFOwZWDLRpgJ/CyYonuIA==, tableContent=null), ArticleFig(id=1322566868087452034, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图14, caption=
航空实测重力数据及上延等值线分布, figureFileSmall=ggJamgd35NnV4hH5ovynaw==, figureFileBig=GQFOwZWDLRpgJ/CyYonuIA==, tableContent=null), ArticleFig(id=1322566868850815364, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 15, caption=
Contour plots of downward continuation results from different methods, figureFileSmall=lFU7CLPwT+Iok5SizWcq3g==, figureFileBig=HISKw8+gl9RZAH7rJgMZ1Q==, tableContent=null), ArticleFig(id=1322566868968255877, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图15, caption=
各方法向下延拓结果等值线分布, figureFileSmall=lFU7CLPwT+Iok5SizWcq3g==, figureFileBig=HISKw8+gl9RZAH7rJgMZ1Q==, tableContent=null), ArticleFig(id=1322566869349937543, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Fig. 16, caption=
Residual plots of downward continuation results from different methods, figureFileSmall=CUpomB+4yQKWeBmdoqc2Sg==, figureFileBig=3lzvYdxs4G1hrzEl4yogpg==, tableContent=null), ArticleFig(id=1322566869719036298, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=图16, caption=
各方法向下延拓结果残差分布, figureFileSmall=CUpomB+4yQKWeBmdoqc2Sg==, figureFileBig=3lzvYdxs4G1hrzEl4yogpg==, tableContent=null), ArticleFig(id=1322566869802922380, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Tab. 1, caption=
Parameter settings of the point quality source
, figureFileSmall=null, figureFileBig=null, tableContent=
| 点质量源序号 | 经度/(°) | 纬度/(°) | 埋深/km | 质量/kg |
| 1 | 151.040 | 24.040 | 0.756 | 1.850×1013 |
| 2 | 151.050 | 24.105 | 0.808 | -1.800×1013 |
| 3 | 151.075 | 24.075 | 0.767 | 1.950×1013 |
| 4 | 151.100 | 24.038 | 0.808 | 1.800×1013 |
| 5 | 151.100 | 24.119 | 0.756 | 1.850×1013 |
), ArticleFig(id=1322566870125883789, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=表1, caption=
点质量源参数设置
, figureFileSmall=null, figureFileBig=null, tableContent=
| 点质量源序号 | 经度/(°) | 纬度/(°) | 埋深/km | 质量/kg |
| 1 | 151.040 | 24.040 | 0.756 | 1.850×1013 |
| 2 | 151.050 | 24.105 | 0.808 | -1.800×1013 |
| 3 | 151.075 | 24.075 | 0.767 | 1.950×1013 |
| 4 | 151.100 | 24.038 | 0.808 | 1.800×1013 |
| 5 | 151.100 | 24.119 | 0.756 | 1.850×1013 |
), ArticleFig(id=1322566870192992654, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Tab. 2, caption=
Comparison of 10 times the point distance error of noise-free downward continuation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 0.338 | -1.958 | 0.200 | 0.127 | 1.133 |
| 泰勒级数展开法 | 0.228 | -1.327 | 0.178 | 0.126 | 0.479 |
| 积分迭代法 | 0.228 | -1.327 | 0.178 | 0.126 | 0.846 |
| Tikhonov正则化法 | 0.187 | -1.365 | 0.211 | 0.152 | 0.860 |
| CGNR法 | 0.069 | -0.719 | 0.159 | 0.122 | 0.982 |
| 迭代最小二乘法 | 0.160 | -0.709 | 0.169 | 0.126 | 0.913 |
| Landweber迭代法 | 0.185 | -0.693 | 0.158 | 0.122 | 18.245 |
), ArticleFig(id=1322566870272684431, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=表2, caption=
无噪声向下延拓10倍点距误差比较
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 0.338 | -1.958 | 0.200 | 0.127 | 1.133 |
| 泰勒级数展开法 | 0.228 | -1.327 | 0.178 | 0.126 | 0.479 |
| 积分迭代法 | 0.228 | -1.327 | 0.178 | 0.126 | 0.846 |
| Tikhonov正则化法 | 0.187 | -1.365 | 0.211 | 0.152 | 0.860 |
| CGNR法 | 0.069 | -0.719 | 0.159 | 0.122 | 0.982 |
| 迭代最小二乘法 | 0.160 | -0.709 | 0.169 | 0.126 | 0.913 |
| Landweber迭代法 | 0.185 | -0.693 | 0.158 | 0.122 | 18.245 |
), ArticleFig(id=1322566872244007313, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Tab. 3, caption=
Comparison of 20 times the point distance error of noise-free downward continuation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 4.177 | -5.336 | 0.841 | 0.466 | 1.138 |
| 泰勒级数展开法 | 5.318 | -6.754 | 0.994 | 0.560 | 0.480 |
| 积分迭代法 | 1.714 | -4.429 | 0.580 | 0.349 | 0.928 |
| Tikhonov正则化法 | 1.647 | -2.683 | 0.536 | 0.323 | 0.837 |
| CGNR法 | 1.178 | -2.192 | 0.512 | 0.351 | 1.157 |
| 迭代最小二乘法 | 1.328 | -2.262 | 0.509 | 0.350 | 1.546 |
| Landweber迭代法 | 1.329 | -2.251 | 0.500 | 0.333 | 38.082 |
), ArticleFig(id=1322566872646660498, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=表3, caption=
无噪声向下延拓20倍点距误差比较
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 4.177 | -5.336 | 0.841 | 0.466 | 1.138 |
| 泰勒级数展开法 | 5.318 | -6.754 | 0.994 | 0.560 | 0.480 |
| 积分迭代法 | 1.714 | -4.429 | 0.580 | 0.349 | 0.928 |
| Tikhonov正则化法 | 1.647 | -2.683 | 0.536 | 0.323 | 0.837 |
| CGNR法 | 1.178 | -2.192 | 0.512 | 0.351 | 1.157 |
| 迭代最小二乘法 | 1.328 | -2.262 | 0.509 | 0.350 | 1.546 |
| Landweber迭代法 | 1.329 | -2.251 | 0.500 | 0.333 | 38.082 |
), ArticleFig(id=1322566872738935187, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Tab. 4, caption=
Comparison of 10 times point distance error of 5% noise downward continuation
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| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 15.787 | -14.752 | 3.529 | 2.815 | 1.881 |
| 泰勒级数展开法 | 7.506 | -7.956 | 1.778 | 1.419 | 0.482 |
| 积分迭代法 | 4.994 | -5.418 | 0.929 | 0.665 | 0.825 |
| Tikhonov正则化法 | 0.701 | -1.482 | 0.292 | 0.225 | 0.844 |
| CGNR法 | 1.227 | -1.844 | 0.343 | 0.273 | 0.939 |
| 迭代最小二乘法 | 1.268 | -1.819 | 0.342 | 0.272 | 0.914 |
| Landweber迭代法 | 0.305 | -0.686 | 0.173 | 0.133 | 14.071 |
), ArticleFig(id=1322566873061896596, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=表4, caption=
5%噪声向下延拓10倍点距误差比较
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| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 15.787 | -14.752 | 3.529 | 2.815 | 1.881 |
| 泰勒级数展开法 | 7.506 | -7.956 | 1.778 | 1.419 | 0.482 |
| 积分迭代法 | 4.994 | -5.418 | 0.929 | 0.665 | 0.825 |
| Tikhonov正则化法 | 0.701 | -1.482 | 0.292 | 0.225 | 0.844 |
| CGNR法 | 1.227 | -1.844 | 0.343 | 0.273 | 0.939 |
| 迭代最小二乘法 | 1.268 | -1.819 | 0.342 | 0.272 | 0.914 |
| Landweber迭代法 | 0.305 | -0.686 | 0.173 | 0.133 | 14.071 |
), ArticleFig(id=1322566873145782677, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Tab. 5, caption=
Comparison of 20 times point distance error of 5% noise downward continuation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 31.575 | -29.552 | 7.098 | 5.662 | 1.935 |
| 泰勒级数展开法 | 10.497 | -12.502 | 2.035 | 1.583 | 0.510 |
| 积分迭代法 | 10.562 | -12.884 | 1.916 | 1.431 | 0.842 |
| Tikhonov正则化法 | 1.717 | -2.987 | 0.579 | 0.368 | 0.855 |
| CGNR法 | 1.657 | -3.363 | 0.613 | 0.459 | 1.136 |
| 迭代最小二乘法 | 1.840 | -3.311 | 0.606 | 0.446 | 1.482 |
| Landweber迭代法 | 1.306 | -2.287 | 0.526 | 0.362 | 34.706 |
), ArticleFig(id=1322566873485521302, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=表5, caption=
5%噪声向下延拓20倍点距误差比较
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 31.575 | -29.552 | 7.098 | 5.662 | 1.935 |
| 泰勒级数展开法 | 10.497 | -12.502 | 2.035 | 1.583 | 0.510 |
| 积分迭代法 | 10.562 | -12.884 | 1.916 | 1.431 | 0.842 |
| Tikhonov正则化法 | 1.717 | -2.987 | 0.579 | 0.368 | 0.855 |
| CGNR法 | 1.657 | -3.363 | 0.613 | 0.459 | 1.136 |
| 迭代最小二乘法 | 1.840 | -3.311 | 0.606 | 0.446 | 1.482 |
| Landweber迭代法 | 1.306 | -2.287 | 0.526 | 0.362 | 34.706 |
), ArticleFig(id=1322566873577795991, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=EN, label=Tab. 6, caption=
Comparison of downward continuation errors of each method
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 71.335 | -75.634 | 17.251 | 13.739 | 1.002 |
| 泰勒级数展开法 | 16.437 | -17.969 | 3.877 | 3.089 | 0.596 |
| 积分迭代法 | 10.139 | -8.346 | 1.988 | 1.548 | 0.722 |
| Tikhonov正则化法 | 6.033 | -6.563 | 1.209 | 0.830 | 1.137 |
| CGNR法 | 6.175 | -7.704 | 1.111 | 0.841 | 0.822 |
| 迭代最小二乘法 | 6.326 | -7.081 | 0.963 | 0.740 | 0.908 |
| Landweber迭代法 | 4.997 | -6.701 | 0.757 | 0.531 | 20.560 |
), ArticleFig(id=1322566873670070680, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322566845706645772, language=CN, label=表6, caption=
各方法向下延拓误差比较
, figureFileSmall=null, figureFileBig=null, tableContent=
| 延拓方法 | 残差最大值/mGal | 残差最小值/mGal | RMSE/mGal | MAE/mGal | 计算时间/s |
| Milne法 | 71.335 | -75.634 | 17.251 | 13.739 | 1.002 |
| 泰勒级数展开法 | 16.437 | -17.969 | 3.877 | 3.089 | 0.596 |
| 积分迭代法 | 10.139 | -8.346 | 1.988 | 1.548 | 0.722 |
| Tikhonov正则化法 | 6.033 | -6.563 | 1.209 | 0.830 | 1.137 |
| CGNR法 | 6.175 | -7.704 | 1.111 | 0.841 | 0.822 |
| 迭代最小二乘法 | 6.326 | -7.081 | 0.963 | 0.740 | 0.908 |
| Landweber迭代法 | 4.997 | -6.701 | 0.757 | 0.531 | 20.560 |
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