(1) promoting local interchange; (2) advancing inter-regional trade; (3) providing urban goods and services to scattered rural population.

The results of the experiment showed that the underground heat exchange system can storage solar energy and use it for heating in the vinylhouse during the night.

Study on High Speed Switch System and Their ASIC Frontend Design;

The programme of the total cell switch system is realized in the form of modules by Verilog & it\'s simulated by Modelsim.

Through ATM exchange system to interconnect to Hubei electric power system exchange network,can achieve the aims of increasing the utilization ratio of the network recourses and heightening the safety of the electric power system exchange network.

This paper introduces the S12-CDMA network optimization, analyzes the relay optimization in S12-CDMA switching system, and advances some concrete methods in routine maintenance.

In this paper, the application of busy tone detecting function of MT8880 in switching system is introduced and a busy tone detecting algorithm is proposed .

From the traffic model of switching system,it has found the way to improve the switch rate of system.

Experimental research of heating by fire-pit and underground heating exchange system in a solar greenhouse;

Fire-pit and underground heating exchange system in the greenhouse integrated fire pithe.