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In the view of encryption,this paper proposes a union coding scheme for compression and encryption based on the matching pursuit(MP).

从便于加密的角度出发,联合考虑视频的压缩和加密,提出一种基于匹配追逐(matching pursuit)的视频压缩加密方案,该方案首先构造基于匹配追逐的视频压缩平台,由于视频信号经匹配追逐分解后,其分解系数的分布取决于字典的选取和输入信号空间特性,即变换系数的分布是随机的,再对变换系数进行完全加密,提高数据的安全性而不会改变压缩效率。

But the existing communication mechanisms have some de- ficiencies in solving communication failure and message chasing.

通信是移动Agent必不可少的组成部分,许多研究者针对这一问题进行了深入的研究,并提出了一些移动Agent的通信机制,但是现有的这些通信机制在解决通信失效和消息追逐上都存在着一定的不足。

The origin,development,current situation and tendency of Western research on children s rough-and-tumble play were discussed.

对西方儿童追逐打闹游戏研究的起源、发展、现状和趋势进行了探讨。

This paper records the experiment and research on the chase-running in the sprint training,and shows that the chase-training can obviously improve sprint players abilities of rapid movemet and their speed.

对追逐跑这种训练方法在短跑训练的作用进行实验研究。