By Jia Li-min, Wang Zhou
This e-book explains the speculation and techniques of procedure optimization layout for railway clever transportation structures (RITS), which optimizes RITS overall functionality by way of reducing the trouble and value of approach improvement and extending the approach potency. Readers will comprehend key ideas of RITS and the newest learn correct to China and different international locations the place RITSs were built. The booklet is appropriate for college students within the box of railway transportation.
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Extra info for The Theory and Method of Design and Optimization for Railway Intelligent Transportation Systems
Example text
The main function is [24]: 1. Operation Command/Control; ensuring the safety operation of the train on the railway network; 2. Transportation Management; handling the management problems of trains and fundamental facilities and ensuring the optimized allocation of route capacity and train application. Considering multi functional operation requirements of different countries, ERTMS/ETCS defined three function levels: ERTMS/ETCS level 1 uses conventional line side signals, adopts the fixed block system to operate, and sends the movement requirements to the train through the point-transponder.
Firstly, we adopt physical architecture context diagram (PACD) to describe the relationship among each system, external users and environment, to determine their mutual information exchange relationship. Secondly, we describe the corresponding relationship between physical framework and logical framework. Finally, we determined physical structure information flow which needs to be exchanged between subsystems, as well as adopted what type of communication means may help to achieve information exchange.
Simultaneously during the process of refinement, we try to keep the balance of data flow diagram at all levels, and gradually generate the next level of data flow diagram. Top-level structure of Chinese RITS logical framework is shown in Fig. 8, and the most important content of logical framework is the description of system functions and the data flow between functions. Research on RITS System Framework The Theory and Method of Design and Optimization for (RITS) 37 RITS Physical Framework Physical framework assigned the definition process of logical framework to RITS physical entities, and in accordance with data flow included the entities of various processes, to determine the framework flow among entities, and thus determine interconnection mode of physical entities.