铁路信息系统编码方法的比较分析

Comparision analysis between the coding methods of basic information

对信息化建设过程的两种基础信息编码方法 (含属性编码和顺序编码 )的定义、基本特点、数学模型、计算机处理模式、适应性与可维护性等方面进行了综合比较分析 ,并得出如下结论 :如果编码对象的属性值经常改变 ,宜采用顺序编码法 ;如果编码对象的属性值基本保持不变 ,则采用含属性编码法可加快编码属性的检索判断。

The two coding methods of basic information, i.e. attributes-containing coding and sequence coding, are compared comprehensively from several aspects such as definition, basic characteristics, mathematical model, computer-processing mode, adaptability and maintainability. The conclusion is drawn that if the attributes' value of coding object changes frequently, it is better to adopt sequence coding method. But, if the attributes' value of the coding object are nearly invariable, it will be faster to search and judge codes of attributes by adopting attributes-containing coding method.