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One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is re 阅读全文
posted @ 2018-08-10 21:52
lypbendlf
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1.数据压缩 数据压缩不仅能够减小存储空间，并且能够加速学习算法。那么什么是数据压缩呢？下面给出了一个简单的例子： 图1.数据压缩的概念 举了两个例子，一个是横轴x1是厘米，纵轴特征x2是英尺，这明显是冗余的，但是在真正的实施过程中，这并不常见，这并不是一个好例子。 另一个例子是，横轴是驾驶员的技术 阅读全文
posted @ 2018-08-10 21:26
lypbendlf
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Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a social n 阅读全文
posted @ 2018-08-10 17:58
lypbendlf
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Given any permutation of the numbers {0, 1, 2,..., N-1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation tha 阅读全文
posted @ 2018-08-10 14:05
lypbendlf
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