نتایج جستجو برای: the long period natural

تعداد نتایج: 16242217  

Journal: :Nature 1990

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Journal: :EPJ Web of Conferences 2015

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Journal: :Astronomy & Astrophysics 2016

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Journal: :اکو هیدرولوژی 0
یعقوب نیازی دانشجوی دکتری علوم و مهندسی آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه یزد علی طالبی دانشیار دانشکدۀ منابع طبیعی، دانشگاه یزد محمد حسین مختاری استادیار دانشکده منابع طبیعی، دانشگاه یزد مجید وظیفه دوست استادیار گروه مهندسی آب دانشگاه گیلان

monitoring and evolution of drought is the first step in any drought management system. in this study, evaluation of a new indexa new method is provided to monitor the severity of drought with remote sensing combined drought index (rcdi). the index is based on the fact that drought is a natural phenomenon caused by a combination of various factors such as a shortage in the amount of precipitati...

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Journal: :Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 1979

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389
سمیرا مسلمی, شادپور ملک پور, کاظم کرمی,

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

15 صفحه اول
پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1391
سمیه ویسی, پریا پرتو, مظفر شریفی,

1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392
رضا جهانشاهی, محمد زارع,

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1389
احسان شاه حسینی, سید صدرالدین موسوی حسینی, مرتضی علاءباف,

cultural iran is a scope that is more extended than the political territories of iran as a political unit. this concept means that cultural geography(mehdi moghanlo-1383-1) of iran is greater than its political geography which, according to history, has a long history extending west-east from kandahar to the euphrates and north-south from the persian gulf to the caucasus including transoxiana a...

15 صفحه اول
2009
Caleb Scharf Kristen Menou

Recent imaging campaigns indicate the possible existence of massive planets on ∼> 1000 year orbits about a few percent of normal stars. Such objects are not easily explained in most current planet formation models. In this Letter we use a large ensemble of N-body simulations to evaluate the potential for planet scattering during relaxation of dynamically active systems to explain very long peri...

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نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید

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