Zhou Shumin

Design and Implementation of Mobile Short Message Service System of Terminal Mode

Sending and receiving SMS messages through the mobile phone have their faults. For making use of the PCpsilas good handling ability, this paper proposes the design method of a mobile short message service system of terminal mode. Connected a PC with a mobile phone through a serial port or a USB port, used VC++6.0 as the development platform, and based on windows serial communication, AT commands, PDU mode, database programming of ADO smart pointers etc., the system is designed and implemented. In order to improve the sending efficiency and real-time performance of SMS, a short message real-time parallel sending algorithm based on multithreading is proposed. This system can be used in many mobile value-added service applications, which implemented sending, receiving, group sending and transmitting mobile short messages real-timely and efficiently.

The Automatic Monitor and Control System of Radon Chamber

Radon chamber is an instrument to calibrate the radon monitors. The radon in the chamber is supplied from radon source., The radon concentration is changing dynamically by the reason of radon decay. A automatic monitor and control system is helpful to keep the stability of the radon concentration in the radon chamber. The paper introduced the mathematic model of radon supplement and proposed a fuzzy controller to improve the radon stability in the radon chamber, the related automatic monitor and control system is developed by this mathematic model. The structure of Radon chamber and the function of every component is presented in detail. The main performance parameter of the radon chamber such as airproof stability and radon concentration certification is discussed.

The Embedded Gateway Based on P2P Protocol

The embedded gateway make it possible for the data from different traditional network transparent transmitted with IP network. But most embedded gateway application limited to LAN and can not support the node communication between different WAN. In order to realize the instant communication of network node in different LAN, an embedded gateway based on P2P protocol is proposed in the paper. The protocol packet format is redefined and work flow between server and client is introduced.