General speaking, agent is a computing entity that can run in a certain environment and responses to its changes so that it can take action actively and flexibly to satisfy the purpose of design. 智能主体是指能在某一环境中运行,并能响应环境的变化,灵活、自主采取行动以满足其设计目标的计算实体。
Diamant is flexible, scalable, adaptive and general, whose policy description and enforcement mechanisms are suitable for the security requirements in inter-domain computing environment. Diamant具有良好的灵活性、可伸缩性、适应性和通用性,能够提供适应域间计算环境安全问题特点的策略描述和策略实施机制。
According to the changing characters of curvature of road center line, the general mathematical model for computing road center line coordinates is deduced. The automatic drawing of center line for roads and ramps is realized in AutoCAD environment and the example is showed. 依据道路中线线形的曲率变化特点,推导了道路中线坐标计算的通用数学模型,并根据一个工程实例在通用图形系统AutoCAD环境下实现了道路与匝道中线的自动绘制。