Allows messages to be broken up into their logical units with specific abstract information for each part 允许将消息分成逻辑单元，每个部分都有特定的抽象信息。
2.
Trees are the underlying abstraction - the infoset - of xml ; but the abstract information takes a specific semantic form 树是xml的底层抽象infoset ，但是抽象信息采用特殊的语义形式。
3.
Fuzzy neural network ( fnn ) is an active branch in the intelligent control . it is composed of the neural network and fuzzy logic system organically . and it is good at self - learning and self - tuning 模糊神经网络是将人工神经网络与模糊逻辑系统相结合的一种能处理抽象信息的网络，具有强大的自学习和自整定功能，是智能控制理论研究领域中一个十分活跃的分支，因此模糊神经网络控制的研究具有重要的意义。
