A layout algorithm based on the multi granularity model was proposed by adopting strategies of both constraint problem solving and backtracking.

综合约束问题求解和回溯控制策略，给出了在粒度分层模型基础上的布局算法。

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This model extends the traditional RBAC model with user credentials, temporal constraints and XML document classification to enforce a content-based time-aware multi-granularity access control.

该模型从用户证书、时间约束、XML文档分类等方面对传统的RBAC模型进行了扩展，以实现基于内容的时间上下文敏感的多粒度访问控制。

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Therefore, a method of mapping extraction and equivalent approximation of multi-granularity macro-model which supports non-standard structure design is presented.

为此，给出一种支持非标结构设计的多粒度宏模型的映射提取与等效近似方法。

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