Here are some techniques for avoiding long-running actions in the UI thread, using a common example: a table or tree that is filled from some sort of database query, network call, or disk.
有一些技术用来避免UI线程中的长时间运行动作，举一个常见的例子：使用某种数据库查询、网络调用或磁盘进行填充的表或树。
With the proliferation of computer and network techniques, database security has become an important research area of information security.
随着计算机与网络技术的广泛应用，数据库安全技术已成为信息安全的重要研究领域。
In this paper we deal with some security techniques applied to network elective system and the construction of an elective database.
介绍了一种可行的网上选课系统的规划、流程以及所采取的安全技术。
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