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The sub-block demarcation with K-Means plus plus in each province's interior and establishment analysis of the relative horizontal velocity field model in Mainland China
Ren YingYing1; Wang Hu2,3; Wang JieXian1; Lian LiZhen4; Zhu WeiDong5; Wang YongZhe6; Zhang ShouJian3
2020-07-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume63Issue:7Pages:2516-2533
AbstractProvincial CORS system is an important part of modern city digitization, informatization and intellectualization, which is easy to obtain the spatiotemporal information of various objects and their related dynamic changes. In order to further realize the modernization and autonomy of the regional framework benchmark, improve the comprehensive service level and emergency support capacity of the modern surveying benchmark, upgrade the accuracy of the regional velocity field and accurately depict its own local motion characteristics in the mainland of China, the velocity field is derived from continuous observation data of the Crustal Movement Observation Network of China (CMONOC) that was surveyed in 2011 2017. Both high precise coordinate and velocity of these CMONOC stations have been calculated with GAMIT/GLOBK software. In addition, the Euler vector of the whole Chinese continent and two-stage plates in the China mainland are reanalyzed based on the above velocity field. On the basis of the Euler vectors of the abovementioned, i. e. the whole Chinese continent, two-stage plates, provincial plates, sub-blocks in some provinces' interior, as well as that of Eurasia plate derived from NNR-NUVEL1A plate motion model, the contribution of the average movement of each block to the horizontal velocity field could be available and then the residual velocity fields in Mainland China are further analyzed and compared. The results show that the NNR-NUVEL1A model only deducts the partial movement trend of the velocity field in Mainland China. In contrast, the overall movement model of Mainland China plate can better reflect the overall movement trend. The movement model of two-stage plates and provincial plates in Chinese mainland, both of whose inner and outer average precision is less than 2 mm.a(-1) and 3 mm.a(-1), respectively, can both depict the local movement characteristics of Mainland China more precisely, and the only difference between them is that the former is easier to understand in the sense of physics while the latter is simpler in using. However, both of them is not perfect for researching the relative motion of some regions such as Xinjiang, Tibetan Plateau, Sichuan, Yunnan where exist complex crustal movement. Hence, through cluster analysis with K-Means++ on horizontal velocity field in these complex areas, these provincial blocks are further decomposed into some sub-blocks quickly and accurately. Our results are in accordance with those of present-day blocks of second order. Consideration to the impact of complex geological structure, topography and geomorphology in these provinces and the physical significance in respect to each corresponding provincial plate, we also give the Euler vectors of these sub-blocks in some provinces' interior. The result can be concluded that not only the average error and mean square error are less than 2 mm.a(-1) in Mainland China but also the precision of horizontal velocity fields can reach 2 mm.a(-1) in some complex regions, that is Xinjiang, Tibet, Sichuan, Yunnan. Obviously, the scheme of the sub-block demarcation in some provinces' interior by the method of K-Means++ is effective and feasible in terms of high precision and convenience.
KeywordCMONOC Velocity field Euler vector Block demarcation Relative motion
DOI10.6038/cjg2020N0401
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000550583600003
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82572
Collection中国科学院国家天文台
Corresponding AuthorWang Hu
Affiliation1.Tongji Univ, Coll Surveying & Geoinformat, Shanghai 200092, Peoples R China
2.Chinese Acad Surveying & Mapping, Beijing 100830, Peoples R China
3.Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
5.Shanghai Ocean Univ, Shanghai 201306, Peoples R China
6.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Ren YingYing,Wang Hu,Wang JieXian,et al. The sub-block demarcation with K-Means plus plus in each province's interior and establishment analysis of the relative horizontal velocity field model in Mainland China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(7):2516-2533.
APA Ren YingYing.,Wang Hu.,Wang JieXian.,Lian LiZhen.,Zhu WeiDong.,...&Zhang ShouJian.(2020).The sub-block demarcation with K-Means plus plus in each province's interior and establishment analysis of the relative horizontal velocity field model in Mainland China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(7),2516-2533.
MLA Ren YingYing,et al."The sub-block demarcation with K-Means plus plus in each province's interior and establishment analysis of the relative horizontal velocity field model in Mainland China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.7(2020):2516-2533.
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