Audio Signal Generator System Based On State Machines

A state machine can make program designing quicker,simpler and more efficient. This paper describes in detail the model for a state machine and the idea for its designing and gives the design process of the state machine through an example of audio signal generator system based on Labview. The result shows that the introduction of the state machine can make complex design processes more clear and the revision of programs easier.     

南泥湾油田长4+5油层酸化解堵研究与应用

长4+5油层为南泥湾油田的主要产层。通过对堵塞现状的分析,认为堵塞的主要原因是原油受长期脱气和注水冷却的双重作用导致蜡质及沥青胶质在井壁附近析出。为了解除污染和堵塞,配置了以不同成份合成含无机酸、有机酸解堵剂、缓蚀剂、粘土防膨剂以及助排剂等成分的复合解堵液。多次现场试验表明,该综合解堵液不仅能有效解除油井近井地带的堵塞,而且具有较强的溶垢能力、相当理想的缓蚀能力以及较好的助排能力。