对口法的"减牵"优化研究

以对口法的”减牵”优化为目标，引入“入线步长”的概念，在分析确定其递变规律的基础上，指出可编顺组号数界限值遵循“入线步长”变化规律而形成菲波纳契数列的实质；通过研究“固定空元位”的合理取定方法，明确“取空区”的构成，发现其数量变化规律及该规律与入线步长变化规律的异同；基于上述研究，提出构建“减牵”入线结构、使对口法减少作业过程次数的优化方法，确定出可编顺组号数界限值新的分布状态，体现调车作业量与可编顺组号数界限值之间更为准确的对应关系。通过分析在不同作业过程实现“减牵”而出现的作业特点，确定出相对有利的“减牵”优化环节，从而减少入线结构备选方案，使优化进程加快。深化研究后，进一步提出“双减牵”优化的方法及其采用条件，使优化达到更高水平。用实例描述本研究给出的各优化过程，验证了优化结果。指出对口法和消逆法这两种主要的入线算法，在一定条件下经优化改进后而发生的趋同化现象。

Research on Reducing Push-pull Trips by the Duikou-method

Aiming at reducing the push-pull trips by the Duikou method,a new term of "line-mapping-steps" is defined.Based on the analysis of the changing rules of the maximum sequence numbers of car flows,the nature of their changing with the line-mapping-steps and producing the Fibonaci sequence is pointed out.By research on the vacant-positions choosing method and its constitution,the rules of its number changing together with its similarities and differences from the "line-mapping-steps" are found.Based on the researching results above,an optimized method of constituting the line-mapping plan of reducing push-pull trips to decrease the operations of the Duikou method is proposed,and the distribution states of the maximum values of sequence numbers of car flows together with their corresponding relation with the shunting loads are made clear.Through the analysis of the shunting characters by reducing the push-pull trips in different phrases,the best step is defined to lessen the number of the candidate schemes and realize the optimization.Furthermore,the optimization method and its conditions are provided and some examples are given to illustrate the detailed procedure.Finally,the trend of assimilation,through optimization,between the Duikou method and the elimination of inverse-order is indicated.