With the data of three observation periods from the GPS deformation monitoring network of a dam, the clustering analysis is conducted on the relative stability of quasi-stable points of the network.

结合某大坝GPS变形监测网的3期观测数据，对GPS变形监测网拟稳点的相对稳定性进行了聚类分析。

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This paper introduces the measurement principle of Laser Alignment Automation Observation Instrument and its structure Characteristic, and gives a case study in Dam Deformation.

本文阐述了激光自动观测仪测量原理及结构特点，并且介绍了它在大坝变形观测中的应用。

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The approach based on wavelet theory and phase space reconstruction for analyzing the law of time-dependent deformation of crack according to the observation data of dam is proposed.

本文基于小波分析理论和相空间重构技术，根据大坝裂缝的实测资料，提出了裂缝时变规律分析方法。

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