中文摘要：

分组列车的组织条件要求较高且程度更复杂,但却有利于提高铁路货物运输的效率和效益。基于系统工程原理以及微观机理融合宏观机制的指导思想,采用定性分析与定量测度相结合、理论推导与仿真实验相融合的方法,系统地研究分组列车的组织特征、集结特性、组织条件和编组方案优化等问题,主要内容和结论如下。（1）分组列车车流组织特征分析。分析分组列车在编成站、换挂站和终到站的作业流程、组织条件和组织形式,并与单组列车进行对比。

英文摘要：

Multi-block train can make railway freight transportation more efficient and effective in spite of its higher and more complex operation requirements.Guided by the ideology of system engineering and micro-mechanism fusing with macro-mechanism,adopting the method of qualitative analysis combining with quantitative measure and theoretical derivation blending with simulation experiment,this paper systematically probes into some related problems,such as operation characteristics,accumulation properties,operation conditions and train formation plan（TFP）optimization,etc.The main research work and results are as follows.（1）Analysis of wagon flow operation features.The operation features of multi-block train were analyzed and contrasted with one-block train（single group train）mode correspondingly,including operation process in formation station,intermediate block-swap station（s）and destination,operation conditions and various operation-mode types,and so on.The results reveal that multiblock train can straightly pass through or partially resort in stations located on its journey,but oneblock train must straightly pass through;multiblock train contains both resorting and non-resorting wagons simultaneously,but one-block train involves either resorting and local-wagons or nonresorting ones;the multi-block train can take account of punctual schedule and load demand synchronously,but not to one-block train.（2）Study on accumulation properties.Two kinds of accumulation process of multi-block train with fixed weight and non-fixed weight were qualitatively analyzed,and the aggregation batch,aggregation occupation time and aggregation cost were quantitatively researched.The results show that assuming the size and interval time of the batch of cars to be independently random variables with identical distribution,the basic-block（i.e.longdistance block）and complementary-block（i.e.short-distance block）can be regarded as two interrelated queuing sub-systems（stochastic service system） with batch-arrival a