The security of the system can be improved by multilevel filter.
这样通过多级过滤提高系统的安全性。
The integrated model can simplify administration of privileges, and is appropriate for multilevel relation database system which has many users or complex security levels.
该模型方便了管理员的权限管理，适合用户较多，安全层次比较复杂的多级关系数据库系统。
A multilevel real-time database system must have security constrains in addition to timing constrains.
一个多级安全实时数据库系统不仅需要有安全限制，同时也要有时间约束。
In multilevel secure operating system, security levels assign to subjects are implemented by give security levels to users and processes which represent users.
在多安全级操作系统中，赋予主体的安全级是通过赋予用户和代表用户的进程实现的。
Inference control in databases is a key field of multilevel secure database system (MLS-DBS) and is an important means to achieve database security.
数据库推理控制是研究高安全等级的安全数据库系统的关键技术之一，是保障数据库安全的重要手段。
The fusion pattern of historical alerts clustering performs to meet various queries for network security statement by using multilevel fusion system structure.
历史报警聚类功能模块采用多级融合的体系结构，实现满足不同用户需求的网络安全状态查询。
In this paper, we proposed a formal security database system access model including a multilevel relation model and a element-level authorization.
提出了一个安全数据库访问控制模型，包括一个多层关系模型和一个用以增强自主访问控制能力的元素级粒度的授权。
In this paper, we proposed a formal security database system access model including a multilevel relation model and a element-level authorization.
提出了一个安全数据库访问控制模型，包括一个多层关系模型和一个用以增强自主访问控制能力的元素级粒度的授权。
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