نتایج جستجو برای: physical surface change

تعداد نتایج: 1772611  

Journal: :IEEE Transactions on Wireless Communications 2008

2005
Ming-Shun Jiang Fei Chai

[1] Surface nutrients and dissolved inorganic carbon (DIC) in the central (CEP) and eastern equatorial Pacific (EEP) show much higher concentrations to the south than to the north of the equator. In this study, the physical and biological controls on this asymmetry are investigated using a coupled physical-biogeochemical model. Two numerical experiments are conducted to examine the effects of a...

Journal: :Proceedings of the National Academy of Sciences 2017

2017
Stéphane Karasiewicz Sylvain Dolédec Sébastien Lefebvre

The ecological niche concept has regained interest under environmental change (e.g., climate change, eutrophication, and habitat destruction), especially to study the impacts on niche shift and conservatism. Here, we propose the within outlying mean indexes (WitOMI), which refine the outlying mean index (OMI) analysis by using its properties in combination with the K-select analysis species mar...

2004
M. Calixto

Gauge symmetries generally appear as a constraint algebra, under which one expects all physical states to be singlets. However, quantum anomalies and boundary conditions introduce central charges and change this picture, thus causing gauge/diffeomorphism modes to become physical. We expose a cohomological (Higgs-less) generation of mass in U (N)-gauge invariant Yang-Mills theories through non-t...

2012
Penglin Zhang Zhiyong Lv Dan Zhang Jiangping Chen

While a lot of approaches have been reported for change detection using high resolution images, few approaches which are used for different scale images have been developed. This paper proposes a change detection approach which can be used to detect the change in images with different scales. In this study, image objects have been extracted from images obtained at different time. Then, descript...

Journal: :Proceedings. Biological sciences 2016
Morgan W Tingley Viviana Ruiz-Gutiérrez Robert L Wilkerson Christine A Howell Rodney B Siegel

An emerging hypothesis in fire ecology is that pyrodiversity increases species diversity. We test whether pyrodiversity-defined as the standard deviation of fire severity-increases avian biodiversity at two spatial scales, and whether and how this relationship may change in the decade following fire. We use a dynamic Bayesian community model applied to a multi-year dataset of bird surveys at 11...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ادبیات و علوم انسانی 1391

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

ژورنال: طلوع بهداشت یزد 2016
اسماعیلی, حبیب الله, رحیمی, حمزه, قلیان اول, مهدی, واحدیان شاهرودی, محمد,

Introduction: The high prevalence of hypertension all over the world and serious side effects is a major health problem in all societies. To reduce these effects, control of blood pressure is very important. Regular physical activity is one of the most effective strategies to reduce the risk of some noncommunicable diseases such as cardiovascular. The present study aimed to determine the effect...

2005
Xiaosu Xie Timothy Liu

A signi cant portion of the world's population is under the in uence of monsoon changes. Understanding of physical processes governing the evolution of Asian monsoon is not only important for regional climate variation, but also crucial to global climate variation. Besides bringing rain to land, monsoons also change ocean currents, ocean upwelling, and coastal ecology. Over land the consequence...

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