硬实时周期任务和软实时非周期任务是实时系统中两种基本的任务类型，它们的混合调度问题是实时研究的重点之一。
The hard periodic task and soft aperiodic task are two basic types of real-time task; their hybrid scheduling is an important part of real-time research.
提出了一种实时系统任务模型，分析了该模型中周期和非周期任务可调度的条件，并给出了一种强实时非周期任务的可预测调度算法。
This paper presents a task model for real time systems and gives the conditions that guarantee periodic and aperiodic tasks to be schedulable respectively.
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.
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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