In traditional RBAC model, relationship between users and roles is static.
在传统的RBAC模型中，用户与角色间的关系是静态对应的。
And, the expanded RBAC model-ERBAC model and the formal description are given.
给出了扩展的RBAC模型—ERBAC模型，并给出了其形式化描述。
A sort of RBAC model for electric power MIS was designed on the basis of studying access control models.
本文在研究r BAC访问控制模型的基础上，设计了一种应用于电力MIS系统的RBAC模型。
Compared with the general RBAC model, this model can dynamically allocate roles based on user attributes.
与普通rbac模型相比，该模型可以动态根据用户属性分配角色。
RBAC model is the most popular access control strategy because of its flexibleness, convenience and security.
RBAC模型具有灵活性、方便性和安全性的特点，因此成为访问控制策略的首选。
On the basis of RBAC model, this paper put forward a new model PRBAC, which was a twolevel model based on the post and role.
在RBAC模型的基础上，提出一种基于岗位和角色的两级访问控制模型——PRBAC。
Present the RBAC model with this well-known modeling language UML , and specify the RBAC model with three views: static view, functional view, and dynamic view.
提出从静态、功能需求、动态观点来分析模型，并利用UML来表示基于角色访问控制模型。
According to this disadvantage, a user properties oriented RBAC model is put forward. The attributes collection and constraints are added based on the original model.
针对这一缺点，提出了一种面向用户属性的RBAC模型，在原有RBAC模型的基础上添加了属性集合和约束。
Based on the classifying of the protected documents, a DR-RBAC model is defined, and its data-flow diagram and two examples of PolicySets expressed by XACML are given out.
在对文档进行分类的基础上，定义了一种双角色的基于角色的访问控制模型，并给出了此模型的数据流图及部分以XACML形式表示的控制策略。
Based on RBAC model, this paper introduces negative authorization into the user assignment and permission assignment, and discusses their realizing approaches and features.
本文在RBAC模型基础上，分别在用户分配和权限分配中引入了负授权，讨论了负授权的实现方式及其特点。
Currently, there are some models that extend RBAC model to support role delegation. However, their supports for constraints on the usage of delegated roles are very limited.
目前已有一些模型扩展了RBAC模型以支持角色委托，但是这些模型对委托限制的支持非常有限。
It also combines dispatching business in public traffic enterprises and RBAC model, localized the latter one, and then put forward the ERBAC model which meets the systematic demand.
将公交企业具体的调度业务与RBAC模型思想结合，对RBAC模型进行了本地化改造，提出了适合系统需求的ERBAC模型。
This dissertation defines the concepts such as role and the role hierarchy, proves the versatile of the IG-RBAC model, and presents the unification of concepts of roles, users and permissions.
论文定义了IG -RBAC模型中角色和角色继承的概念，证明了IG - RBAC模型的通用性，并提出以角色统一用户和权限的概念。
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。
A problem that child role cannot obtain private permissions because of inherited relation in the Role-Based Access Control (RBAC) model is researched.
针对基于角色的访问控制(RBAC)模型中由于继承关系产生的子角色不能拥有私有权限问题进行了研究。
A problem that child role cannot obtain private permissions because of inherited relation in the Role-Based Access Control (RBAC) model is researched.
针对基于角色的访问控制(RBAC)模型中由于继承关系产生的子角色不能拥有私有权限问题进行了研究。
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