该模型解决了传统的基于角色访问控制中的动态适应性差和最小权限约束假象的问题，用于分布式工作流管理系统，提高了安全性、实用性。
This model overcomes the weaknesses of the bad dynamic adaption and the fake constraint of the least privilege. It can enhance the security and practicability of the distributed workflow system.
分布式系统的可靠性不仅取决于它的资源（如程序和数据文件）的分布，而且取决于它的通讯链路和节点的可靠性。 分布式实时软件还应考虑时间约束因子。
The reliability of distributed computing system depends not only on the reliability of communication links and nodes, but also on the resources distribution, including programs and data files.
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