视听传播是教育理论与实践的一个分支，它主要研究对控制学习过程的信息进行设计和使用。
Audiovisual communications is that branch of educational theory and practice concerned with the design and use of message which control the learning process.
在主动数据库的理论与应用研究中，更新传播算法的应用，保证了系统在属性依赖方面的相容性。
In research of active database's theory and application, the application of update propagation maintains the consistency of database system in attribute dependency.
本文把求解半空间散射问题的FDTD技术与地波传播理论相结合，研究任意复杂目标的地波散射特性。
In this paper, the ground wave scattering from a complex target is investigated by combining the FDTD technique of solving the semi-space scattering problem with the theory of ground wave propagation.
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