以下为句子列表：
英文: Digital correlation method combined with statistical analysis was applied to pick up the characteristic information of the crack in electric power locomotive electrode, by which crack was identified successfully.
中文: 以电力机车主极为研究对象，将数字测相法和统计分析相结合提取主极裂纹的特征信息，并成功用于识别主极上有无裂纹。
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英文: Digital correlation method was used to extract phase information as the phase information of eddy current testing signals could reflect the characteristics of detecting system.
中文: 摘要涡流检测信号中的相位信息能反映检测系统的某些特性，讨论用数字相关法提取相位特征信息。
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英文: The principle of utilizing digital correlation method to detect the phases of the two sine signals with the same frequency was discussed.
中文: 介绍了采用相关分析法测量两路同频率正弦信号相位的数字化方法基本原理。
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