The running time of K-means overly depends on the initial points but the right value of k is unknown and selecting the initial points effectively is also difficult.
均值聚类算法的执行时间过度依赖于初始点的选取，但是在实际问题中并不知道k的取值和怎样才能有效地选取初始点。
Corresponding schemes are given for different forms of information, and also several difficult points in concrete realization are discussed briefly in this thesis.
本文针对各种不同的信息形式提出了相应的实现方案，并对实际操作中的几个难点事项做了简要讨论。
This is also a reason, trying to understand each word is difficult, and it is not necessary at all. You should catch the most important points.
这也是一个原因，想要理解每个单词是很困难的，而且是根本不必要的，应该抓住要点。
These are not only the emphases and difficult points in the capital construction in institutions of higher learning but also highly-disputed hot issues in the architecture market at present.
这些问题是高等院校基本建设管理的重点和难点，也是目前建筑市场争论较多的热点话题。
The measure of enterprise performance is the hot topic of management science continuously, and is also one of the difficult points of business management.
企业绩效评价一直是管理科学研究的热点问题，也是企业管理的难点之一。
The measure of enterprise performance is the hot topic of management science continuously, and is also one of the difficult points of business management.
企业绩效评价一直是管理科学研究的热点问题，也是企业管理的难点之一。
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