本文用信号分解和叠加的理论及方法，推导出一种适用于分析运算放大电路反馈特性的“分解方框图”，并通过实例介绍了相量图分析法。

In this paper, authors deduce a analysis scheme explaining feedback characteristic of a operation amplifier using the theory and method of signal composing and decomposing.

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隧道监控量测及信息反馈技术是新奥法（NATM）原理修建隧道的主要内容之一。

The tunneling monitoring measurment and information feedback technology is one of the major content to construct tunnels using the principle of the new Austrain tunneling method (NATM).

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