Design of Urban Transit Operation Decision System Reusability Control Based on CAD Technology

The paper introduced the structure of Urban Mass Transit Operation Decision system and the functions of individual sub-systems. It determined five major functions of Basal-Net Reusability Control, such as UMT net edit, UMT net display, passenger flow simulation, the train operation simulation, huge passenger flow simulation, which depended on the needs of individual sub-systems. It analyzed the basic structures of UMT net and determined three basic elements station, section, and line. In addition, this paper ensured the needs of various elements of the basic attributes, which in accordance with algorithm. On the basis of CAD technology, we designed basic framework of the Basal-Net Reusability Control and utilized the basic principles of Design Pattern, accordingly constructed Primitive Class, Collection Class, and Interactive Operation Class. It described detailed information of interrelationships between the classes of control and the realizations of the basic operations of creating the objects, selecting the object, and modifying the object. At last, the paper gave some cases about how to use the Basal-Net Reusability Control.