中文摘要：

从弱硬实时系统定义出发，概述现有弱硬实时约束规范及其相互关系，提出了一种约束规范（m^-，p），与已有的约束规范作了严格性强弱的比较，并给予了证明；同时修正了Bcraat提出的一个约束强弱比较的定理．

英文摘要：

This paper presents the definition of a weakly hard real-time system, and summarizes the existent constraint specifications of this system and their relationships. A constraint specification （m^-, p） is put forward. Theorems including their proofs are presented to compare the stringency between the constraint specifications. Moreover, a theorem proposed by Bernat for stringency compare is corrected in this paper.