The improved CA model can be used for simulating the urban road traffic flow of median speed.
改进后的CA模型，适用于对城市道路上中速车流运行状况的模拟。
It puts great emphasis on the analysis and realization of a extended CA model that the author puts forward.
文章的重点之一是针对作者提出的一个扩展CA模型进行分析和实现。
Existing Grid security certificate models include: centralized ca (certificate Authority) model, multi-CA model and crossed certificate model.
现有的网格安全认证模型有集中式层次认证模型、多CA结构的模型和混合交叉认证模型。
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