The identification model is constructed to choose and classify the declining industries in cities.
构建衰退产业识别模型对城市衰退产业进行筛选和分类；
Based on fuzzy set theory, we bring forward a new concept: similarity degree of waveforms, and use fuzzy pattern identification method to classify ECG waveforms.
本文从模糊集合的角度，提出了波形相似度的概念，并采用模糊模式识别方法，基于波形间的相似度对心电波形进行分类。
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