该文主要介绍了如何利用离散余弦变换(DCT)实现对于图象文件的数据隐藏技术，详细说明了该技术的基本原理和实现方法，以及对现有算法的改进。
This paper introduces how to use DCT (discrete-cosine transform) in data-hiding technology in image, and its fundamental theory and algorithms, special improvements of existing algorithms.
将改进的文件同步技术、双机热备份技术和动态负载均衡技术应用于信息查询系统当中。
The technologies of file synchronization technology, duplicate hot standby technology and dynamic load-balance were applied in this information system requirement.
机群文件系统DCFS2采用分布式日志技术和改进的两阶段提交协议解决了分布式元数据处理下元数据的一致性问题。
Moreover, DCFS2 solved the metadata consistency problem for distributed metadata processing through a distributed logging technology and a simplified two-phase commit protocol.
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