| 面向全时段查询的移动对象时空数据模型研究 |
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| 引用本文： | 马林兵,张新长.面向全时段查询的移动对象时空数据模型研究[J].测绘学报,2008,37(2):0-249. |
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| 作者姓名： | 马林兵 张新长 |
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| 作者单位： | 中山大学地理科学与规划学院,广东,广州,510275;中山大学地理科学与规划学院,广东,广州,510275 |
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| 基金项目： | 地理信息系统教育部重点实验室(武汉大学)开放基金
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985工程项目 |
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| 摘 要： | 大量移动对象时空数据的有效管理是移动空间信息服务的一个新兴的研究内容。本文提出一个面向全时段查询的移动对象时空数据模型，并给出基本的模型定义；探讨移动对象过去、现在和将来的运动位置估算方法，这些方法包括延时法、滑动平均法、三次指数法等；研究了移动对象的状态更新策略，提出一个适应于更新时间间隔的变动阈值法的移动对象的状态更新策略，该策略采用时间滑动窗口形式建立移动对象状态更新间隔的一元指数回归方程，通过求取回归参数获得移动对象状态更新趋势，利用该参数动态调整状态更新闽值。最后，给出实验模拟结果，并对今后的研究工作进行了展望。
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| 关 键 词： | 移动对象 时空数据模型 运动状态更新 |
| 文章编号： | 1001-1595(2008)02-0207-05 |
| 修稿时间： | 2007年6月11日 |
Research on Full-period Query Oriented Moving Objects Spatio-Temporal Data Model |
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| MA Lin-bing,ZHANG Xin-chang.Research on Full-period Query Oriented Moving Objects Spatio-Temporal Data Model[J].Acta Geodaetica et Cartographica Sinica,2008,37(2):0-249. |
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| Authors: | MA Lin-bing ZHANG Xin-chang |
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| Abstract: | With the development of mobile communication mobile positioning technique and GPS,managing a large of moving objects efficiently become a new research content in mobile spatial information service.A moving objects spatio-temporal data model oriented full-period query was put forward and its basic definition was given out.Several methods of evaluating motion location were discussed,such as time-delay method,moving average method and cubic exponent method.State updating tactic of moving objects was studied deeply and a new state updating tactic of moving objects was presented,which can be adapted to the interval of state updating of moving object.For the tactic,a one-variable exponent regression equation of moving objects updating interval was built in a moving time window and the trend of state updating of moving objects was indicated by regression parameter of the equation.So the regression parameter can be used to adjust the threshold of state updating.Finally,a experiment result was presented by stimulating motion of moving object in computation and further research work was prospected. |
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| Keywords: | moving objects spatio-temporal data model motion state updating |
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