The keyboard does not need an additional hardware circuit and is controlled with software to have low energy consumption operation mode.

It introduces the features and working mode of intelligent numerical voltmeters, and describes its application combined with specific work.

Bi-directional DC/DC converter with various operating mode;

In the paper, the characteristics and operating modes of UV communication and the main factors affecting UV communication are described.

Analysis of right leg working styles at different linking stages of different throwing items;

Aiming at current phenomena of neglecting site planning and design generally existed in domestic field of city planning and urban design, this paper makes analysis of the problems in terms of the integral conception, organi- zation of function, psychology of users and working style.

This article tries to make a exposition of the Party building in state enterprises from the angles of basical principles , leading system , working style and the building of leading group.