利用观测资料建立安全监测模型，必须首先对资料进行误差分析，确定粗差以保证资料的可靠性。

Therefore, we must analyze at fast these data errors and decide gross errors and insure the data reliability when we create the dam safety monitoring model by using survey data.

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本文中所设计的网络安全监测模型，以当今流行的入侵检测技术为主要方法，采用实时的基于NIDS的技术。

The model of the network security monitor system discussed in the thesis USES the popular intrusion detection technology as the main method, and adopts the technology based on real-time NIDS.

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主要工作如下：（1）对安全监测自动化的基本概念、假设和系统模型进行系统分析。

The main contents are as follows:(1) Theory system of safety monitoring automation for Hydrological structure are established, relative concepts and assumptions are also cleared up.

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