利用电子计算机编制列车运行图是一项要求理论与实际相结合的、技术难度非常大的科研项目。长期以来,它一直被人们所关注与重视。国内外研究利用电子计算机编制列车运行图大都开始于五十年代末、六十年代初。经过三 The use of computer to prepare the train diagram is a combination of theory and practice, technical difficulty is very large research projects. For a long time, it has been people’s attention and attention. At home and abroad to study the use of computer-based train operation diagram mostly started in the late fifties, early sixties. After three