According to the author s experience, four basic factors were given which are site-database, frequency plan, neighbor plan and indoor distribution system.

A method of hardware control on the switched reluctance motor and generator system made up of pure hardware circuit based on a complex programmable logic device CPLD is presented, according to the execrable surrounding where the switched reluctance motor and generator works and the feature of low anti-jamming of software control in Hybrid Electric Vehicles.

On Design and Engineering Realization of the Cable-Cabin Structural Control Hardware for Large Radio Telescope;

Automatic control system of astronomical telescope is mainly presented from the control hardware aspect in this text; We receive two signals (from handle box and PC) at the same time and dispose them and drive telescope working to implement finding star automatically offline and online adopting intelligent MPU named W77E58 with double COM ports

The structure,the function and the design principle of data controls in test platform are introduced.

The data control in the Visual Basic is a convenient tool of operating database.

The main route of accessing database in the Visual Basic is using database object, but a majority of VB teaching materials only simply introduce the Data Control and ADO Data Control.

The paper introduced the feature of the VB 6 language and the ways and means of develop Database application using VB, and discussed two approachs of accessing backend database: using data control or using ADO.