The paper introduces the communication protocols and features of DMX512 and CAN bus local area network,and gives the implement method of mix communication network using switch net bridgebased DMX512/CAN and CAN/DMX512.

Partition basic-element method of transforming bridge and its application;

A machinery,called transforming bridge,which can play a connected and transformable role,is designed between the two players,so that in the role of this machinery,the conflict two player can gain their satisfied solution,and then the conflict is eliminated.

in this article the transforming bridge set is studied.

In this paper, the elementary concepts of transforming bridge are summed, and the transforming bridge methods of opposite problems and opposite systems are put forward.

Aimed at the proplems exsiting in the process of the low permeabile reservoir production, the feasibility and the best adjustment moment of rhombus nine-spot well pattern transformation and infilling are studied with a Changqing oilfield′s block with the ubiquitous problems in low permeability oilfield development.

Research on conversion gateway for IPv4/IPv6 based on NAT-PT;

Through applying a new protocol mapping method that uses XML Schema technology to model the protocol mapping,a conversion gateway is designed.

This paper introduce a way based on embedded system that can realize the serial ports conversion gateway.