The LabVIEW-based Digital Process Simulation systems connect with commercial controllers through 4-20mA or 1-5V industrial standard signals,testing the controllers by simulating various typical processes.
We research this to solve the present problem in the field of concrete construction, to meet the requirement of the commercial concrete corporation to integrate the information and management of its internal development, and to enhance the abilities of its own in the competitions.
POS system, which is called real-time management system of sales point too, means that commodity information data process was accomplished instantly during selling. So it is a new type of commercial sales system that come into practice with the popularization and development of computer technology.
Development and Application of DSM Database &. MIS for Beijing Commercial Sector and Residencial Sector
In the paper, we study synthetically operation characteristics of information flow, commercial flow, capital flow and trading flow in the EC system, and insist on two important principle: practice and opening when building the simulation system.