对T型电阻网络反馈扩展微弱电流测量原理和测量参数估计方法进行了分析，阐述了该仪器的测量不确定度。
The principle of feedback extension in t resistance network and the estimation method of measuring parameter are analyzed. The indeterminate of the instrument is discussed.
本文提出一种确定桩土系统固有频率的参数估计方法。
This paper presents a parameter assessment method to determine the eigenfrequency of the pile-soil system.
对于线性系统，本文针对其系统矩阵a存在一类不确定性扰动的情况，提出了一种基于遗传算法(GA)的新的参数估计方法。
This paper proposed a new method for parameter estimation based on genetic algorithms (GA) for linear systems in the case of its coefficient matrix with uncertain disturbance.
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