Specifically, it examinedwhether the direct feedback or the indirect feedback in the way of underlining with adescription of types of errors led the learners to improve their linguistic accuracy butreduce the writing complexity.

The results showed that both experimental groups made significant improvement with indirect feedback more effective than direct feedback.

The design of speed feedback in a digital AC servo control system;

Controlling spatiotemporal chaos by speed feedback method

In this paper, some methods for realiaing speed feedback are analnd .

The substance of the Skyhook control is discussed and a new semi-active vibration control strategy based on acceleration feedback and velocity feedback is established.

The experiment shows that, no matter how the supporter is excited, harmonically or randomly, its vibration may effectively be suppressed by using piezoceramic material as sensors and actuators to achieve velocity feedback controlling.

By means of velocity feedback control agolrithm the active vibration control of laminates is fulfilled.

The wire-feed speed control system based on negative feedback of speed is designed.

Reduction of mechanical resonance based on load acceleration feedback for servo system;

Research on Acceleration Feedback Position Control System for AC Permanent magnet Linear Synchromotor;

Improving low-rate performance of turntable by acceleration feedback;