着重讨论了几种常用的损伤检测方法，包括：损伤指标法、反分析法、模式识别法和异常检测法，并结合作者的一些研究进行了比较分析；
Some damage detection methods such as damage index method, inverse analysis method, pattern identification, novelty detection, are then discussed according to author' s study.
将这种滤波器放置在傅里叶反变换产生相关输出之前的联合功率谱面上，该技术可以应用在具有不同灰度图像的模式识别中。
The filter is put on the power spectrum before applying the inverse Fourier transform to yield the correlation output. This technique can be used in pattern recognition of grey level input image.
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