نتایج جستجو برای: روش gwr

تعداد نتایج: 370133  

2013
Jean-François Mas Gabriela Cuevas Araceli Andablo Reyes

This study identifies drivers of deforestation in Mexico by applying Geographically Weighted Regression (GWR) models to cartographic and statistical data. A wall-to-wall multitemporal GIS database was constructed incorporating digital land use/land cover maps for 2002 and 2007; along with ancillary data (road network, settlements, topography and socioeconomical parameters). The database analysi...

2016
Tianhao Zhang Wei Gong Wei Wang Yuxi Ji Zhongmin Zhu Yusi Huang

Highly accurate data on the spatial distribution of ambient fine particulate matter (<2.5 μm: PM2.5) is currently quite limited in China. By introducing NO₂ and Enhanced Vegetation Index (EVI) into the Geographically Weighted Regression (GWR) model, a newly developed GWR model combined with a fused Aerosol Optical Depth (AOD) product and meteorological parameters could explain approximately 87%...

2011
Chaosheng Zhang Ya Tang Xianli Xu Ger Kiely

It is challenging to perform spatial geochemical modelling due to the spatial heterogeneity features of geochemical variables. Meanwhile, high quality geochemical maps are needed for better environmental management. Soil organic C (SOC) distribution maps are required for improvements in soil management and for the estimation of C stocks at regional scales. This study investigates the use of a g...

Journal: :Remote Sensing 2017
Mengmeng Wang Guojin He Zhaoming Zhang Guizhou Wang Zhengjia Zhang Xiaojie Cao Zhijie Wu Xiuguo Liu

Near surface air temperature (NSAT) is a primary descriptor of terrestrial environmental conditions. In recent decades, many efforts have been made to develop various methods for obtaining spatially continuous NSAT from gauge or station observations. This study compared three spatial interpolation (i.e., Kriging, Spline, and Inversion Distance Weighting (IDW)) and two regression analysis (i.e.,...

2016
Mary Margaret Ford Linda D. Highfield Thomas Behrens

Cardiovascular disease (CVD), the leading cause of death in the United States, is impacted by neighborhood-level factors including social deprivation. To measure the association between social deprivation and CVD mortality in Harris County, Texas, global (Ordinary Least Squares (OLS) and local (Geographically Weighted Regression (GWR)) models were built. The models explored the spatial variatio...

ژورنال: محیط شناسی 2016

در این تحقیق، مدل‌سازی اثرات انواع کاربری اراضی بر روی 13 پارامتر کیفیت آب اندازه گیری شده در 42 ایستگاه ‌هیدرومتری مربوط به تعدادی از حوزه‌های‌ آبخیز واقع در استان فارس، مورد بررسی قرار گرفت. بدین منظور، از روش‌های رگرسیونی چند متغیره خطی OLS و GWR برای تعیین روابط بین متغیرهای وابسته (پارامتر کیفیت آب) و متغیرهای مستقل (درصد کاربری اراضی) استفاده شد. پارامتر‌های کیفیت آب شامل کلسیم، کلر، هدای...

Journal: :International Journal of Geographical Information Science 2011
Huiguo Zhang Changlin Mei

This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date...

2011
Martin Atzmueller Andreas Hotho Annalisa Appice Michelangelo Ceci Donato Malerba Antonietta Lanza Anna Ciampi Angelo Muolo Stephan Doerfel Folke Mitzlaff Gerd Stumme Padraig Cunningham Zaigham Faraz Siddiqui Myra Spiliopoulou Panagiotis Symeonidis Eleftherios Tiakas

Despite the growing ubiquity of sensor deployments and the advances in sensor data analysis technology, relatively little attention has been paid to the spatial non-stationarity of sensed data which is an intrinsic property of the geographically distributed data. In this paper we deal with non-stationarity of geographically distributed data for the task of regression. At this purpose, we extend...

Journal: :Journal of Geographical Systems 2011
Ana C. L. Sá José M. C. Pereira Martin Charlton Bernardo Mota Paulo M. Barbosa A. Stewart Fotheringham

This study analyses the relationship between fire incidence and some environmental factors, exploring the spatial non-stationarity of the phenomenon in sub-Saharan Africa. Geographically weighted regression (GWR) was used to study the above relationship. Environment covariates comprise land cover, anthropogenic and climatic variables. GWR was compared to ordinary least squares, and the hypothes...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2007
Shekib A Jami William G Wright David L Glanzman

Differential classical conditioning of the gill-withdrawal response (GWR) in Aplysia can be elicited by training in which a conditioned stimulus (CS) delivered to one side of the siphon (the CS+) is paired with a noxious unconditioned stimulus (US; tail shock), while a second conditioned stimulus (the CS-), delivered to a different siphon site, is unpaired with the US. NMDA receptor (NMDAR) act...

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