RPDS将处理器时间流分成连续的小段，并在每一小段中强制为非硬实时任务分配一个时间片。
RPDS partitions CPU time flow into continuous segments, and in each segment RPDS will forcibly assign one time slice to non-hard real-time tasks.
实时任务分为周期任务和非周期任务，由于两类不同任务的超时特性不同，因而分析方法也不同。
Real-time tasks are divided into periodic tasks and aperiodic tasks, Since two kinds of tasks have different missed feature, it is must to use the different analysis method.
在分析非周期实时任务可调度性的基础上，提出一种基于处理器瞬态利用率、系统安全风险最小的在线调度近似算法。
Based on the concept of synthetic utilization of aperiodic tasks, an online task scheduling algorithm is designed to schedule security-sensitive aperiodic tasks with minimal security risk.
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