数据广播的根本目的就是为了解决移动数据库系统用户规模庞大以及网络通信条件不平衡等问题。
To solve the problem of large scale of mobile clients and network communication asymmetry is the primary purpose of datacasting.
嵌入式移动数据库系统（EMDBS）在许多领域的广泛应用正在给信息产业带来一场深刻的变革。
The extensive applications of embedded mobile database system (EMDBS) in many realms are bringing a deep reform to information industry.
场景：您已经创建了一个测试数据库系统，现在希望将其移动到位于不同机器上的产品系统中。
Scenario: you've created a test database system that you want to move into production on a separate system.
在移动环境下，客户缓存为提高客户-服务器数据库系统的整体性能提供了有效途径。
Under mobile environments, client caching provides an effective way to improve client-server database system performance.
在主动数据库系统中，预先制定相应的规则，用事件作触发器去操纵数据库，能为移动数据库提供主动功能。
In active database systems, establish relevant rules in advance, using events as trigger to manipulate database, can provide active function for mobile database.
方案中还提出了以SIP地址域的分级方式进行组织管理的用户数据库系统，定义了为子网中移动终端服务的区域代理。
The scheme also defines a user database system organized by hierarchical domains of SIP address, and a domain agent managing mobile nodes in subnetwork.
而且，由于移动实时数据库系统中大多数事务都是复杂的嵌套事务，传统调度策略都已不太适用。
Moreover, conventional concurrency control and scheduling methods for update transactions are not suitable in that mobile real-time transactions are complicated and nested.
此系统结合GIS数据库系统能够表述移动物体和支持对运动物体的查询，从而实现基于位置的服务。
Now, GIS was required to represent moving objects and to support querying on the motion properties of objects for location-based services.
尤其就资源的有限性而言，它导致系统不可能完全满足移动实时数据库系统性能多方面的要求。
The unpredictable system workload and even possible overloading, the limited system resources are the problems which must be resolved in mobile real-time applications.
尤其就资源的有限性而言，它导致系统不可能完全满足移动实时数据库系统性能多方面的要求。
The unpredictable system workload and even possible overloading, the limited system resources are the problems which must be resolved in mobile real-time applications.
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