نتایج جستجو برای: spatial and temporal changes

تعداد نتایج: 16975576  

Journal: :Forests 2021

Timely monitoring of the changes in coverage and growth conditions vegetation (forest, grass) is very important for preserving regional global ecological environment. Vegetation information mainly reflected by its spectral characteristics, namely, differences green plant leaves canopies remote sensing domains. The normalized difference index (NDVI) commonly used to describe dynamic vegetation, ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...

Journal: :International Journal of Environmental Research and Public Health 2021

Mohsen Mohammadzadeh, Somayeh Mousavi ,

 Fitting a suitable covariance function for the correlation structure of spatial-temporal data requires de-trending the data. In this article, some potential models for spatial-temporal trend are presented. Eventually the best model will be announced for de-trending tropospheric ozone concentration data for the city of Tehran (Capital city of Iran). By using the selected trend model, some ...

Journal: :فیزیک زمین و فضا 0
تیمور علیزاده دانشگاه تهران قاسم عزیزی دانشگاه تهران علیرضا محب الحجه دانشگاه تهران فرامرز خوش اخلاق دانشگاه تهران

today, extra tropical cyclones are recognized not only for the important influence they exert on midlatitude weather conditions but also for their integral role in the earth’s climate system. (gary luckmann, 2012). extra tropical cyclones are fundamental meteorological features and play a key role in a broad range of weather phenomena. they are a central component maintaining the global atmosph...

The relationship between topography, land use, and topsoil moisture storage is investigated for a small catchment with undulating deep loess hilslopes in the south of the Netherlands. For a period of 10 months, soil moisture profiles have been measured weekly at 15 locations throughout the catchment. A Generalized Additive Model was employed to find relationships between the various factors inf...

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