Technology tracking is a useful method in identifying the current situation and trend of development in related technical areas,and ean help us provide the information decision-making support for establishment of technical strategy,but the in- depth research of technology tracking is not enough.

The article makes preliminary discussion on the mode of technology tracking,puts forward four kind of modes of technology tracking,simultaneously to analysis the influencing factors of technology tracking mode,forms the theory frame of the technology tracking mo.

Founded on concept explanation, the article makes preliminary discussion on the structure and process of technology tracking, developed tools of technology tracking based on patent quotation, which as a kind of technical analysis is fundamental to of technology strat.

The count tracking of the dummy bar head and tail when sending the dummy bar and beginning the cast is analyzed.

The stability and high precision of tracking servo system can not be reached at the same time by using traditional monopulse tracking method, so a computer-aided tracking technology is adopted in tracking servo system for this problem.

Z-Tracking technique is an effective technique for civilian GPS receivers to eliminate or weaken the impact of AS(Anti-Spoofing) policy, and to implement precision ranging, navigation & positioning.

Z-tracking technique is one effective method to eliminate the effect of AS.