نتایج جستجو برای: keywords gravity model

تعداد نتایج: 3802081  

2010
Martina Lawless

This paper uses a gravity model approach in order to analyse the geographical patterns of Irish exports. The gravity model in international trade has been demonstrated to be an extremely robust empirical method. The gravity model is first applied to aggregate Irish exports from 1980 to 2007. Distance is found to have a strong negative effect on exports. On the other hand, exports are positively...

2008
GUIHUA WANG DAKE CHEN JILAN SU

Generation of mesoscale eddies in the eastern South China Sea (SCS) in winters during August 1999 to July 2002 is studied with a reduced-gravity model. It is found that the orographic wind jets associated with the northeast winter monsoon and the gaps in the mountainous island chain along the eastern boundary of the SCS can spin up cyclonic and anticyclonic eddies over the SCS. Results suggest ...

2006
T Huw Edwards

I apply concentration measures from the inequality literature the Lorenz curve and Gini coefficient to the measurement of global and regional integration, and show that these can be derived from the theoretical gravity model in the presence of unequal costs of access for firms from different locations to a particular market. Overall, comparing 9 economies, I find that the USA is the most global...

2009
Chang Chen

Warehouse location is one of the most important logistics activities. The selection of the most effective warehousing mode has become a strategic study. This paper will introduce the factors influencing the decision process in selecting the warehouse locations based on gravity model approach and analytic hierarchy process. In the end, the author will summarize the methods and the results.

Journal: :English Text Construction 2012

Journal: :African Studies Review 2023

Abstract “Queer” is a relatively recent and somewhat controversial term in African studies. Yet it proving to be productive, not only for understanding subjectivities of sexuality gender, but also situating Africa’s position the larger economy knowledge. Otu van Klinken explore productive tensions between “queer” “Africa,” aim read Africa as queer from Africa. Thus, rather than imagining polar ...

Gravity data inversion is one of the important steps in the interpretation of practical gravity data. The inversion result can be obtained by minimization of the Tikhonov objective function. The determination of an optimal regularization parameter is highly important in the gravity data inversion. In this work, an attempt was made to use the active constrain balancing (ACB) method to select the...

Journal: :فیزیک زمین و فضا 0
علیرضا آزموده اردلان استاد، گروه مهندسی نقشه برداری قطب علمی مهندسی نقشه برداری و مقابله با سوانح طبیعی دانشکدة فنی دانشگاه تهران، ایران داوود زمزم استادیار، دانشگاه آزاد اسلامی قزوین، ایران محمدعلی شریفی استادیار، گروه مهندسی نقشه برداری قطب علمی مهندسی نقشه برداری و مقابله با سوانح طبیعی دانشکدة فنی دانشگاه تهران، ایران

various sources of geodetic, geological and geophysical information can improve our understanding about the crustal density. in this paper we propose a methodology for determination of crustal density based on terrestrial gravity observations, geopotential models, digital terrain models (dtm), geological maps and cross-sections, deep geophysical profiles, and geoid models. the method can be alg...

Journal: :Journal of the Medical Library Association : JMLA 2015

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