After years of research work, several new systems for automatic hump yard speed control are developed, they are the Retarder Shooting Intermittent Type Speed Control system and the Retarder Shooting-Propelling Trolley or Dowty Unit Intermittent-Continuous Speed Control System. 经过长期努力,现已研究成功多种适合国情的自动化驼峰调速系统,它们是减速器打靶的点式系统、减速器打靶加推送小车或减速顶的点连式系统。
By rendering Dowty's argument selection from an abstract procedure into a concrete feature structure presentation, Davis has successfully introduced the lexical entailments into HPSG ( Head-Driven Phrase Structure Grammar). Davis通过把Dowty的论元选择从一个抽象过程实现为特征结构表达式,成功地将词汇语义蕴涵引入到HPSG框架之内。
Principles and Method for Dowty Retarder Hump Yard Design 减速顶驼峰车场设计原理与方法