the paper briefly introduce the production, development and the application prospect of tgis, elaborates the concept of temporal database and educe the bitemporal theory.
本文简要介绍了时态gis的产生、发展及应用前景，阐述了时态数据库的概念，引入了双时态理论。
integrity is one of the objectives related to information system security, this paper presents a model to specify integrity policies for temporal database management system.
数据完整性是信息系统的安全目标之一，该文描述了一个时间相关的数据库管理系统的完整性策略模型。
we propose a temporal database model named gt.
本文给出了一个时态数据库模型gt。
the history, present and future of objects are recorded in temporal database which reflects the development of real world.
时态数据库中记录了对象的历史、现在和将来，从而真实的反映现实世界的发展变化。
making reference to historical relational database model and extending traditional relational database, a temporal database model was proposed to distributed simulation data collection system.
参考历史关系数据库模型，对传统关系数据库进行扩展，提出适用于分布仿真数据收集的时态数据库模型；
from the point of view of the history of temporal database, the development and the state-of-the-art of temporal database are summarized.
从时态数据库的研究历史出发，总结了时态数据库的发展与研究现状；
for its increasing importance in the data warehouse applications, temporal aggregation query have become the focus of the temporal database research.
时态数据库扩展了传统的关系数据库，其中一个重要的扩展就是对于时态聚集查询的支持。
temporal database systems extend traditional relational database systems. one important such extension is to support time-varying aggregation.
时态数据库扩展了传统的关系数据库，其中一个重要的扩展就是对于时态聚集查询的支持。
temporal database of land use was used to manage increment data in effect and to retrieve the historical data of land use by the method of plot flow.
土地利用时态数据库能有效地管理增量数据，按「图元流动」的方法可实现土地利用数据的历史回溯。
the spatial information database of land reclamation is a temporal database due to the change of land resource with the coal mining.
沉陷地土地资源信息随着煤炭的开采而不断变化，所以，矿区土地复垦空间数据库是一个时态数据库。
experiment shows that compared with the conventional database, the temporal database model can greatly improve the efficiency of temporal data management in simulation environment.
比较实验表明，应用该模型对仿真运行环境中的时态数据进行管理具有更高的效率。
in this paper, temporal database is used in management of postgraduate information and rules at different times.
采用时态数据库对不同时期的研究生信息及研究生规则进行管理。
all these work provides basis for future implementation of temporal database and also accumulates the technologies and experience of the temporal middleware development.
本文为将来真正意义上的时态数据库的实现打下了基础，同时为时态中间件技术的发展积累了知识和经验。
in order to implement a temporal database management system, we have to set up a query language for the data model.
为了实现时态数据库管理系统，除了数据模型之外，还需要有一个时态数据库的查询语言。
varities of temporal database models are built on traditional relation database models.
以传统关系数据模型为基础建立了多种时态数据库模型。
oracle flashback is another temporal database product that supports the record-temporal feature.
oracle flashback是另一个时态数据库产品，支持记录时态特性。
constraints involving multiple time granularities exist in many temporal database applications.
在许多时态数据库应用中，都存在着涉及多时间粒度的约束。
erwin discussed the design options for implementing bi-temporality in domain models by using a temporal database or writing custom code.
erwin讨论了在领域模型中实现双时态（bi-temporality）的设计选择：使用一个时态数据库（temporal database）或编写自己的代码。
the logical design of temporal database is discussed in this thesis.
论文讨论了时态数据库的逻辑设计过程。