The effect in the vicinity of the exciting electrode and detecting electrode is greater than that of the center of the pipe.
离散相介质的存在对激励电极和测量电极附近区域灵敏场的影响比较大，对管道中心区域的影响则比较小。
In this paper, the electrode structure and single electrode current exciting mode are deeply analyzed and optimized by the fundamental study of ERT technology.
本论文从ERT技术的原理性研究出发，针对该技术中电极结构设计进行了分析与优化，并对单电极电流激励模式做了深入的研究和优化。
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