In this paper,combining part drawing of water and electricity station,primary attempt to CAD secondary exploration of hydraulic engineering is made,including development of special line-type and filling and Visual Lisp language,etc.

By using Hamilton graph,the problem of wagons placing-in and taking-out on branch-shaped sidings can be turned into searching Hamilton loop of minimum power.

Based on AutoCAD,a CAD library for hydraulic structure drawing is developed by ObjectARX and Visual C++5 0 language It consists of drawing environment, drawing libraries for hydraulic structures, dam drawing, special dimensions,special linetype, special tables, visual editing etc It s easy to use and convenient to further development and extensio

A test and maintenance platform using a general circuit board tester was designed for testing special BUS using circuit modules.

In the process of special bus design for a peripheral to ARM9 processor,the system is broken down because of bus-competing,and the physical address can not be directly accessed by the programs in Windows CE.

Design summary of Dongzhouyao railway private line;

Design and implementation of Management Information System forrailway freight equipment and private line;