基于队列网络模型，由化学抽象机中形式化描述的软件体系结构规约，导出了一种性能评价模型。
Then the paper derives a performance evaluation model, based on a Queueing Network Model, from a software architecture specification formally described in Chemical Abstract Machine.
探讨和分析了如何提高继电保护装置性能的问题，并提出通信结构和规约方面应全面与国际接轨。
How to improve the performance of relay protection device is discussed, and it suggests that the communication structure and stipulation should be compatible with international communication standard.
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