船舶导航系统安全属性约简的研究

Research on Safety Attribute Reduction in Ship Navigation System

信息技术对船舶导航的影响越来越大,针对导航信息系统安全评估工作的研究也逐步深入。在安全评估过程中一般需要考虑各类安全属性,如何从安全评估的历史数据中,消除冗余属性,发掘出有利于安全评估的信息,是我们所关心的问题。提出一种船舶导航系统安全属性约简的方法,在变精度粗糙集基本概念的基础上,以布尔函数为数学工具,对属性约简进行描述。实例说明,这种方法可以根据历史数据,有效地进行决策系统的属性约简,从而减轻系统决策的工作量,提高系统决策的工作效率。

Information technology is getting more important for ship navigation.Many studies on ship navigation safety assessment with system information are carried out.In the process of safety assessment all safety-related attributes should be considered.The issue is how to eliminate redundant attributes and how to excavate useful information from historical data.A method of attribute reduction in ship navigation system is proposed based on the basic concept of VPRS,The Boolean function is taken as the mathematical tool to descript attribute reduction.Example shows that this method carries out attribute reduction effectively through using historical data in a decision making system.Thus,the workload of the decision making system is reduced and its efficiency enhanced.