重力模型

本文分析了多项式Logit模型和双约束重力模型在铁路客运枢纽换乘量预测中的应用。

Then the paper introduces the Logit model and constraints gravity model for the forecast of the passenger volume transferred .

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 paper puts forward an improved method on the basis of gravity model to forecast the OD freight volume of railway luggage and parcel transportation .

然后，本文对现有OD预测方法进行了比选分析，认为在缺乏完整的OD数据时应采用重力模型法。

Then , the paper has also carried out contrastive analysis on available OD forecast methods , and deems that gravity model should be adopt when being short of the entire OD data .

在现状公交O-D的基础上，利用重新标定后的线性回归模型和双约束重力模型进行公交需求预测。

Based on current transit OD , the linear regression model validated newly and gravity model of double constraints are used to forecast transit demand .

本文在介绍客流特征定量分析方法的基础上，研究了Logit交通方式选择模型、重力模型和灰色理论的GM（1,1）模型进行客流量预测的方法，并研究了敏感度分析方法。

This paper makes study on forecast methods of passenger flow using different models such on Logit Model , Gravity Model and GM ( 1,1 ) Model , and also studies on analysis method of sensitivity after introducing the quantities analysis method for passenger flow characteristics .

实证结果表明，采用改进的重力模型比传统的重力模型预测结果更接近实际，可用于铁路行包运输OD运量预测。

The practical result shows that the forecasted result under the improved gravity model is more close to the true result than that by the traditional gravity model and that it can be used in forecasting the OD freight volume of railway luggage and parcel transportation .

制约重力模型的修正与应用

Inducement of Revised Constrained Gravity Model and Its Calibration and Application

基于重力模型的广西城市群雏形研究

Embryonic form of urban groups based on Gravity Model in Guangxi

基于重力模型预测诱增交通量方法研究

Study on Method of Induced Traffic Prediction Based On Gravity Model

重力模型在未来交通分布预测中的应用

The Application of Gravitation Model for Future Traffic Distribution Forcast

用重力模型分析影响双边贸易的地理因素

A Gravity Model Approach to Geographical Factors in Bilateral Trade

引进人口重力模型来表示森林的被视可能性；

The possibility of being visualized was represented by a population gravity model .

空间重力模型标定方法与使用范围的研究

Calibration Method and Application Scope of Spatial Gravity Model

建立大气环境及重力模型。

Constructs the models of atmosphere and the gravity ;

重力模型标定方法及应用研究

On Calibration of the Gravity Model During Traffic Forecast

在公交客流分布预测中重力模型的参数标定及其应用研究

Algorithms and Application of Gravitational Model in Mass Transit Passenger Flow Distribution Forecast

重力模型明确的通过地区间的阻抗来将分布量和小区联系起来。

The gravity model explicitly relates flows between zones to interzonal impedance to travel .

以重力模型法计算诱发客流；

The flow of passengers is brought out in model law calculation with gravity ;

逐步回归方法和重力模型在货运量预测中的应用

Application of the Multistep Regression Method and the Gravity Model in Rail Freight Traffic Forecasting

一种改进的重力模型标定方法

An Improved Calibration Method of Gravity Model

应用重力模型的之前，你应该先校准阻抗函数。

Prior to applying a gravity model , one has to calibrate the impedance function .

把双约束重力模型引入到环形交叉口的流向分析中，有效地解决了这一问题。

The authors introduce the dual-constrained gravity model for the analysis of traffic turns and resolve the problem successfully .

采用小区间相关关系对重力模型分布结果进行了修正。

Used between the plot the correlational dependence to carry on the revision to the gravitational model distribution distribution result .

从重力模型出发，以统一技术标准为焦点，国际农产品贸易中技术性贸易壁垒的经济效应，在此得到了分析。

The effects of technical barrier to trade ( TBT ) in international marketing is analyzed in economics in this paper .

并运用重力模型验证和分析了距离因素对中国农产品出口市场分布和出口规模的影响。

Meanwhile , the gravity model is applied to proof the influence of the distance on China 's agricultural products trade pattern .

本章回顾了贸易重力模型的基本形式和理论基础，并对引入制度变量的贸易重力模型的应用进行了综述。

This chapter reviews the basic form and its theoretical foundation and overviews the usage of trade gravity models including institutional variables .

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。

The gravity model approach to international trade proves to be effective in the quantitative study of the geographical factors influencing bilateral trade .

本文对国内外常用的交通分布模型进行了评析，指出了增长系数法和重力模型所存在的缺点和问题。

This artical analyses the trip distribution models which are widely used in the world and points out the shortcomings and problems in those models .

运用地理信息系统和可达性模式、重力模型等相应的空间分析技术，确定了贵遵产业带的空间范围；

Fourthly , by means of these analysis techniques , GIS and models of attainability and gravity , it ascertains the scope of Guiyang-Zunyi industrial zone ;

引入最大熵模型的原理和方法，对物流分布预测的四阶段方法中的重力模型做了一定的改进，可以将发生概率最大的物流分布视为预测的物流分布，使得模型参数容易标定。

The paper introduces the principle and method of Entropy-maximizing ( EM ) model , improves the gravitational model of the four-phases of logistics distribution forecast .