For the mult-input and parameters perturbation system of suspension, H∞ robust control method is proposed base on input decoupling to restrain parameter perturbation, then the closed loop control of position and angle is realized.

An exploration into various proofs of a theorem about characteristic vectors and zero-input responses;

This paper , based on the students listening barriers, looks into the ways of stage improvement , comprehensible input , relaxing environment, and a variety of trainings strategies in order to improve students to listening ability .

On the basis of Krashen s input hypothesis theory,this paper explores the application of the theory in the teaching practice of medical listening and focuses on how to improve quality and results of medical listening teaching from the perspectives of comprehensible input,interesting input and adequate input.

In view of the current situation,the paper focuses on the experimental way of overcoming the improper expression in college students written English on the basis of Krashen s Input theory and emphasizes the importance of comprehensible input in colleg.