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Background Chinese citizens regularly experience some form of bodily pain, yet little is known regarding the epidemiology of pain. Methods We conducted a nationally representative sample cross sectional study to estimate the prevalence of pain and identify risk factors of pain among 19,665 community residents aged 18–65 years in China. The China Sub-optimal Health Survey (CSHS) data was used to...
Studying the services value of oasis ecosystems in arid middle reaches of the Heihe Oasis is significant for understanding the development and evolution, revealing the maintaining mechanism of oasis security, and promoting the resources and environment sustainable development of this area. Based on the data of landsat TM image in the middle of Heihe River Basin acquired in 2000 and 2006, land use...
In this study, 9 quantitative indices of remote sensing were established by using the spectrum information of Landsat TM image in 2006 and the topographical information of DEMs with the techniques of RS and GIS. Then, these indices were used to establish a discriminated function based on the stepwise discriminant analysis of spatial statistics in support of SPSS software. The wetland, grassland, river,...
Remote sensing of vegetation is developing into a highly quantitative science. 6S atmospheric correction model based on radiative transfer theory, with a definite physical meaning, but it provided a limited number of patterns which are difficult to reasonably describe atmospheric conditions in a specific study area, therefore, in the absence of measured data, it is necessary to select or estimate...
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