This paper expounds the design thought of DTV center business support platform form the design of interconnection,the disposition of data base and the consideration of high security zone,etc,from which the readers can come to understand the DTV center.

This paper mainly gives the introduction about the theory and development for the education of public safe culture and building of safe community which is concerned by both Chinese and foreign people.

The concept and the theory of community safety are derived from safety management, the theoretical study on community safety could provide important criteria for the development of safe community, and could further provide the foundation for establishing the community safety management system.

This paper will give an introduction about the theory and development conditions of building the safe community concerned by both China and foreign countries.

By using the calculating method based on “Three Underlying Belts”Theory, this paper makes division of 9#coal bed bearing the threat of pressed water into safe zone and danger zone, which provide valuable materials for Xiyu Coal Mine to guide the safety in production of this mine.

Objective: To mark off the safe zone at the medial and lateral calcaneus and the proximal tibia for percutaneous pin placement and provide the clinical surgeon the basic information for safe operation to reduce clinical complications.

During the process of exchanging the coordinate dimensions to a series of holes,It′s necessary to set the safe area for composition tolerance zone to the hole′s central distances and expand the area according to different boundary conditions.

Application of Security Division in Power Supervision and Control System’s Information Manage Architecture;

Based on CT test of a certain sandstone under uniaxial compression,the safety zone,the damaging zone and the fracture zone of the sandstone are defined.