位置不确定持续移动对象的离散表示

基于快照模型，提出对多个离散快照进行整体插值来生成不确定性二维移动点对象的离散模型用于时空数据库系统的实现。利用GM（1，1）模型，通过灰生成降低各个离散快照本身包含的不确定性，建立能够反映移动对象的整体运动趋势的离散实现模型。与线性插值模型的对比实验说明，信息受限情况下采用该模型计算位置不确定持续运动对象的时空运动情况能够保持稳定的低误筹率。

The Discrete Representation of Continuously Moving Indeterminate Objects

To incorporate indeterminacy in spatio-temporal database systems, grey modeling method is used for the calculations of the discrete models of indeterminate two dimension continuously moving objects. The Grey Model GM(1,1) model generated from the snapshot sequence reduces the randomness of discrete snapshot and generates the holistic measure of object's movements. Comparisons to traditional linear models show that when information is limited this model can be used in the interpolation and near future prediction of uncertain continuously moving spatio-temporal objects.