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《Science of Surveying and Mapping》 2008-S3
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Study on De-noising of GPS single epoch deformation signals based on wavelet transform

WANG Bo ①② ,ZHANG Shu-bi①,WU Jiang-wei③,LU Yun ①② (①School of Environmental Science and Spatial Informatics in China University of Mining And Technology,Xuzhou 221008,China; ②Jiangsu Key Laboratory of Resource and Environmental Information Engineering,Xuzhou 221008,China; ③Nei Menggu survey and design institute of water conservancy and Hydro-electric power,Huhehaote 010020,China)  
Based on the principle of the multi-resolution analysis of the wavelet transform,in the paper author clarified the principle of wavelet De-noising methods based on threshold noise reduction and median value filtering,and the wavelet transform of the Weighted-median value filtering method was presented on the base of median value filtering with improvement. Moreover,the Weighted-median value filtering was made comparison with the soft threshold-value de-noising,the hard threshold-value de-noising and median value filtering by simulation respectively. Experimental results show that advantages of using of the Weighted-median value filtering to high frequency of wavelet transform and then reconstructing single epoch GPS deformation monitoring signals consist in not only being able to reserve effective signals to large extent,decompose noise efficiently,keep signals smooth,but also having perfect robustness to gross errors.
【CateGory Index】: P228.4
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【Citations】
Chinese Journal Full-text Database 3 Hits
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【Co-citations】
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1 ZHOU Ming-zheng,WANG Jun(Dept.of Comp. Sci & Engn. , Anhui University of Technology and Science, Wuhu 241000, China);Regnenration of gray level image of endoscope based on fuzzy hereditary algorithm[J];Journal of Anhui University of Technology and Science;2004-04
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8 XUE Qin~1,ZOU Dao-wen~2,Lü Ke~1,OUYANG Jing~1,WANG Sheng-qian~2,LIU Zhu-hua~1(1.Key Laboratory of Photoelectron,Jiangxi Normal University,Nanchang 330027,China;2.Applied Physics Department Jiangxi Science & Technology Normal College,Nanchang 330013,China);A Method of Wavelet Image Enhancement Based on Modulus Square Processing[J];Journal of Jiangxi Normal University (Natural Sciences Edition);2005-06
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1 GAO Yong-quan ①,ZHANG Chuan yin ②(①Hebei Agriculture University,Baoding 071001,China;②China Academy of Surveying and Mapping,Beijing 100039,China);Multi-altimetric Data Processing Approaches in Shallow Water[J];Developments In Surveying and Mapping;2002-02
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