Based on "Double Powers Exciting Method" and ANN technique, the moisture and the available clay content of green sand can be calculated quickly by the system.

本文基于“双电源二次激励法”的基本原理，并利用人工神经网络技术求得型砂含水量及有效粘土含量。

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Ann Powers is an expert on viruses.

VOA: special.2009.04.13