To solve the scheduling problem, which is NP hard in production system, the production plan and Control Expert System is used in heuristic search to avoid the large-scale search space in this paper. According to the theory of Petri net modeling and the deduction requirement of PPCES, a kind of extended Petri nets is defined. This method can enhance the descriptive ablity of model and at the same time reduce its complexity. Expert system is used to instruct the running of the Petri nets model in order to execute intellextual control, and in this manner the combination explosion, which is caused by those common analyzing methods, can be avoided.

The working principle and hardware as well as software of full-automatic diesel oilemulsification equipment based on single chip computer is discussed.This equipment has many functions,working automatically and continually,setting the proportion of mixing,safety,self-checking,alarming,and so on.

网上银行与传统银行相比,在提供优质服务、拓宽业务领域、改善管理模式、改进业务处理方式及降低经营成本等诸多方面具有显著的优势.论述了发展中国网上银行事业,必须不断创新经营方式、建立一套安全保障系统、统一发展规划和规范、健全法律保障体系、积极发展和造就庞大的客户群体.

A new digital temperature-measuring instrument that possesses the measuring and transmitting functions in itself has been designed. It is controlled by single chip computer. Such instrument is a combination of temperature-measuring signal processing component, the temperature meter and the transmitting part. With the adoption of a portable structure, it can not only be installed on the spot, but also used as the indicating and transmitting part for the measurement of the temperature. Besides, such a portable instrument can be used as an ordinary meter for temperature - measurement. The instrument has low cost and high precision, the scope of application being wide.