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《Science of Surveying and Mapping》 2007-05
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The uncertainty of deformation monitoring signal de-noising

QU Guo-qing①②,DANG Ya-min③,ZHANG Chuan-yin③(① Shangdong University of Science and Technology,Qingdao 266510,China;② Shandong University of Technology,Zibo 255049,China;③ Chinese Academy of Surveying and Mapping,Beijing 100039,Chin  
The deformation appears as weak signal,and error appears as strong noise.The method that wavelet packet decomposes the signal to remove noise can decomposes the detail components,so it has more accurate ability of de-noising.In course of signal reconstruction with best basis of wavelet packets,the signal has some loss.Because of the error with normal distribution,the method of hypothesis test is introduced to evaluate the interval of the error caused by signal reconstruction if de-nosing approximates fitting.Then the uncertainty of the error caused by signal reconstruction is identified.The quality of de-nosing with this method is appraised.
【Fund】: 山东理工大学基金项目;; 中科院百人计划项目资助
【CateGory Index】: TN911.4
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