7 7、与实时系统相关的几个基本概念 、与实时系统相关的几个基本概念 事件驱动系统 （ event-driven system ）：其 行为是通过对外部事件产生特定反应的 系统。 时间驱动系统（time-driven system）：是 指根据时间长短或者到达时刻来产生...
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这类事件驱动系统可以通过大量资料分析产生模型，且无须随时存取所有资料。
These event-driven systems can form models by analyzing massive amounts of data, but they don't rely on accessing all that data all the time.
乐观会话锁定还可用于消息顺序无法保证的事件驱动或基于消息的系统中。
Another use of optimistic session locking is in event driven or message-based systems where message sequence is not guaranteed.
当机会和威胁在不可预测的时间出现时，事件驱动的系统必须在外部确定的时间响应事件。
As opportunities and threats appear at unpredictable times, event-driven systems must respond to events at times that are externally determined.
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