The paper puts forward an improved method on the basis of gravity model to forecast the od freight volume of railway luggage and parcel transportation.
对铁路行包od运量的预测提出一种基于重力模型的改进方法。
The gravity model approach to international trade proves to be effective in the quantitative study of the geographical factors influencing bilateral trade.
国际贸易的重力模型方法对量化研究双边贸易中的地理因素是非常成功的。
By using the EGM96 model and the simulated improved gravity model after GOCE mission for gravity compensation, the accuracy of INS is analysed respectively.
分析了分别采用现有重力场模型EGM96和实施GOCE任务后改进的重力场模型进行重力补偿，惯导系统所能达到的定位精度。
The four stage method and a double gravity model were used to forecast the OD(origin-destination) distribution of air traffic flow in the whole airspace of China.
基于四阶段法，采用双重力模型，预测全国空域的交通流量OD分布。
The research via gravity model shows that the system quality of each country will impact bilateral trade effectively, and the trade flow is large between the countries with similar systems.
通过应用引力模型的研究发现，各国制度的优劣对双边贸易有显著的影响，制度相似的国家间贸易量较大。
The recovery of the lunar gravity field model depends on the tracking observation of lunar detectors, the highest lunar gravity model order is connected with denseness of the tracking data.
月球重力场的恢复依赖于对绕球探测器的跟踪观测，可恢复重力场模型的最高阶次与观测数据分布的密集程度之间满足一定的关系。
This paper makes a comprehensive and systematic study of the establishment of the earth's ellipsoidal gravity model and the solution of the boundary value problem under ellipsoidal boundary.
本文全面、系统的研究了地球重力场椭球谐模型的建立和边值问题在椭球界面下的求解情况。
We found that the gravity model improved the modeling method for the future mortality of our country, and provided a more accurate forecast for the future mortality rate of China's population.
研究发现，引力模型改进了我国人口未来死亡率建模的方法，提供了更准确的预测。
Gravity model is a good tool to explain the direction and flow of bilateral trade, and has gained success on the empirical research in international trade.
引力模型作为解释双边贸易流向和流量问题的有力的分析工具，已经在国际贸易实证研究中获得了相当的成功。
Gravity model is used to analyze the data of 30 main import countries of wood furniture from China from 2005 to 2006, and the effect of economic scale and distance on Chinese wood export is analyzed.
应用引力模型，以2005-2006年中国主要的30个木质家具出口国为研究对象，来分析经济规模、地理距离对中国木质家具出口的影响。
Gravity model is used to analyze the data of 30 main import countries of wood furniture from China from 2005 to 2006, and the effect of economic scale and distance on Chinese wood export is analyzed.
应用引力模型，以2005-2006年中国主要的30个木质家具出口国为研究对象，来分析经济规模、地理距离对中国木质家具出口的影响。
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