This paper has mainly discussed and explained different phenomena during duplication checking and the determina-tion of assistant distinguishing number in corresponding situations by citing examples.

The confusion status in cognizance, cataloging of edition and secondary distinguishing of edition of same sort of modern Chinese books is stated, and the method of improvement about it is proposed.

A coherent rapid acquisition system using an auxiliary sequence and pre-loop estimator;

According to the physiological mechanism formed by athletic skills, the paper analyzes the function of auxiliary signals in technical ability learning, and then puts forward its classification, application and points for attention.