...义 IEC61850中虽然目前对时间同步报文没有直接的要求，但对时间同步报文所 实现的时间精度--时间性能类(time performance class)却有具体的规定 二、数字化变电站时钟同步系统 二、数字化变电站时钟同步系统 22、数字化变电站对时钟同步的要求 、数字化变电站...
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The current strategy for maximizing performance and convenience is to retrieve metadata for a particular table the first time an instance of the class that maps to that table is instantiated.
为了使性能最大化和更加便利，目前的策略是从某一个表中提出元数据，先把一个类的实例映射到那个表上，用来初始化。
The danger time and escape times at every class time from Monday to Saturday are computed. The personnel escape performance of that building is investigated as a result.
以一栋教学楼为例，计算了危险来临时间和周一到周六各上课时段的人员疏散所需时间，分析了教学楼的安全疏散性能。
It offers improved performance because the browser definition information is parsed from the XML configuration file and compiled into a class ahead of time.
此方法可提高性能，原因是浏览器定义信息从XML配置文件中分析，并提前被编译到类中。
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