An integrated study on technology evolution and its new research focus——evolution of emerging technology;

[OBJECTIVE]Many studies on agricultural technology emphasized characteristic and method of a certain historical period rather than phased research deeply on characteristic and cause of agricultural technology evolution showed in a whole historical phase.

The background, purpose and realistic significance about the discussing the control tactics of high-performance invertors for the adjustable drive of AC motors is explained from the three angles of open up market, technology evolution and the making policy for leaders in this paper.

Combining with the three technological leadership transfers of world automobile industry,this paper analyzes the relationship between technology innovation and technology evolution curve.

Based on the geophysical characteristics of each medium in the studied area, combining with the geophysical inversion technique, the location of tertiary thin-layer aquifer is delineated, the top depth of granite basement is identified.

Using backstepping technique and adaptive sliding mode control method, a global asymptotically tracking control law is developed.

Using backstepping technique,a kind of control structure is presented in this paper.