Management and maintenance of State Electric Power Corporation digital data network;

It converts RS-232 signal into E1 signal using level matching technology and transmits site data directly via digital data network using HDB3 encoding technology,which improves channel stability,reduces error code rate and simplifies au.

An Feasibility Analysis of the Development of Railway DDN;

The analyses and comparisons of main performance of network technique such as DDN, frame relay, ATM, gigabit ethernet and so on are carried out.

The application of digital network sound system to English teaching;

OBJECTIVE: To discuss the challenges and opportunities for traditional pharmacies in digital network time.

The research of digital screening technology on the existing conditions in recent years was summarized including amplitude modulation screening,frequency modulation screening,and hybrid screening.

The paper proposes an algorithm about digital screening based on Delaunay triangulation.

The digital screening is the kernel technique of map color reproduction and color rendition.

The application of networked-CNC system in retrofitting a large imported machine;

Interface Mode of DNC Communication in Networked-CNC Manufacture System;