This paper discusses the necessities and advantages of applying self-assessment in college English teaching.

This paper gives a general review of the controlled language in relation to machine translation, outlining its definition, development, advantages and main features.

The paper explains the influences of multimedia teaching from the positive and negative respects,so that we can grasp the degree and quantity better,and take good advantage of the multimedia in advancing the quality-oriented education of the music.

And by calculating and comparing the parameters of spread spectrum disposal gain and the bit error rate of the three common jamming methods(wide-band noise jamming, narrow-band noise jamming and pulse jamming),the authors conclude that the pulse noise has a better jamming effectiveness, and give the corresponding simulation result

As different types of traffic have different bit rates, required bit error rate (BER) and processing gain, it was reasonable to give different types of media different transmission power which can be obtained from the power control method.

Anti-interference performance of white noise for the spread-spectrum systems is no better than that of the digital communication system with the matched filter by processing gain of the spread-spectrum systems.

By analyzing the correlation between the suppression capability of FH communication for multiple interferences and FH processing gain,a method for calculating the anti-jamming capability of FH communication system for wide-band interference,multi-tune interference and tracking interference is given in this article.