نتایج جستجو برای: statistical analysis and spatial stratification

تعداد نتایج: 17331887  

Afrakhteh, Hasan, Chegini, Robab, Saeednia, Ahmad, Soleimani, Mohammad,

The rural centers integrations in the city which in some countries have been named as “urban villages” are the consequence of rapid urbanization and accelerated growth of our city. Since the rural centers integration in the city has been often without any plan, it has had various consequences on the environmental, physical, economical and social aspects. The present study has paid attention to ...

2012
R. BURAU MARK STACEY

In this paper we discuss field observations and modeling results examining the connection between flow-induced stratification and gravitational circulation. We present simultaneous ADCP and top and bottom salinity records collected by the USGS showing that density-driven flows are highly intermittent, with strong gravitational circulation accompanying stratification episodes. Tidal variations i...

Drought is one of the environmental events and an inseparable part of climatic fluctuations. This phenomenon is one of the main characteristics of the various climates. Awareness of spatiotemporal behavior is effective in land planning. The spatial statistical methods provide the means by which they analyze the spatial patterns of random variables such as precipitation. In this study, using the...

Journal: :IJAEIS 2013
Anne Jacquin Michel Goulard

Fire is acknowledged to be a factor for explaining the disturbance of vegetation dynamics interacting with other environmental factors. In this study, the authors want to clarify the importance and the role of fire on the dynamics of savanna vegetation. The study area is the Marovoay watershed located on the north-west coast of Madagascar. In this site, burning herbaceous cover is the main prac...

2012
S. DRAY H. H. WAGNER

Species spatial distributions are the result of population demography, behavioral traits, and species interactions in spatially heterogeneous environmental conditions. Hence the composition of species assemblages is an integrative response variable, and its variability can be explained by the complex interplay among several structuring factors. The thorough analysis of spatial variation in spec...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده ادبیات و علوم انسانی 1391

during the process of reading, sometimes learners use ineffective and inefficient strategies and some factors may influence their use of strategies. perhaps critical thinking is one of these factors. this study aims to identify those categories of reading strategies that are mostly used by iranian efl learners and to see if there is any significant relationship between the critical thinking abi...

Journal: :مدیریت آب و آبیاری 0
سید پویان پیرنیا کارشناس ارشد مهندسی ساز ههای آبی، گروه ساز ههای آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران جمال محمد ولی سامانی استاد گروه مهندسی سازه های آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران جواد منعم استادیار گروه مهندسی ساز ههای آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران

the determination of temporal and spatial salinity in tidal rivers is significant in supplying water for agriculture purposes, particularly where there is no controller dam at the downstream. in this research, the coherens model was applied to study the hydraulics of water flow, salinity distribution and transmission at the bahmanshir river. coherens is a 3d multi-purpose hydrodynamic model whi...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده زبانهای خارجی 1389

previous studies have aimed at testing a hypothesis but the present study is data-first research in which researcher tries to form a theory from data rather than the use of data to test a hypothesis. this study aims at exploring teachers perceptions of the strengths and weaknesses of the current syllabus for college preparatory course. eight experienced teachers were selected to collect data du...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1390

abstract in this study, we synthesized a novel template polymer by using methacrylic acid (mma) as functional monomer, ethylene glycol dimethacrylate(egdma) as cross linker, 2,2-azobisisobutyronitrile (aibn) as initiator and olanzapine as targeted molecule in the presence of chloroform and acetonitrile as solvent. the products have been characterized and confirmed by (chn)elemental analysis,...

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