This paper describes the principle and application of correlation method in the absolute radioactivity measurement.

本文介绍用于放射性核素活度绝对测量的相关方法的基本原理、应用及其优点。

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At present, the measurement of sluice gate opening usually USES the digital encoder. It has the advantage of high measuring precision and USES the absolute coding method which makes it widely used.

目前水库闸门开度测量通常使用的是数字编码器，它的测量精确度高且使用绝对编码技术，得到广泛的应用。

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The instrument plays a very important role in the absolute measurement of laser wavelength. Principle and method of I...

这种仪器对激光波长的绝对测量会起到重要作用，我们简介了它的测量原理和测试方法。

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