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我寫作本章時參考了以下網站，讀者要想進一步學習，歡迎到這些網站進一步了解更多信息：
● http://www.numpy.org/
● https://www.scipy.org/
● http://www.nltk.org/
● http://scikit-learn.org/stable/modules/decomposition.html
● http://www.tensorfly.cn/
● http://blog.csdn.net/pianoorrock/article/details/70174810
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