نتایج جستجو برای: gravity model

تعداد نتایج: 2153001  

Journal: :JCP 2010
Liping Wang

Firstly, the paper reviews the study situation of trade gravity model at home and abroad, and points out that the trade gravity model is not widely applied in the industrial trade flow. Secondly, the paper takes the export of China’s textile industry as an example to put forward export trade gravity model, and analyzes the influence of trade protection upon export of our textiles and other infl...

2016
Toshihiro Okubo

The purpose of this paper is to discuss the trading system in the inter-war period concerning the Japanese Empire by means of border effect analysis in the gravity model. The results show sizeable and steadily increasing trading bloc border effects from the 1910s through the 1930s. This sizeable border effect might have resulted from many possible factors: trade diversion and creation due to in...

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.

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...

Farshad Ranjbar Ravasan Majid Einian,

Although initially originated as a totally empirical relationship to explain the volume of trade between two partners, gravity equation has been the focus of several theoretic models that try to explain it. Specialization models are of great importance in providing a solid theoretic ground for gravity equation in bilateral trade. Some research papers try to improve specialization models by addi...

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