The getLinkIfPresent method deals with a difference between RSS and Atom: In RSS, the node value is the actual link, while in Atom you need to use the href attribute.

getLinkIfPresent 方法则可处理 RSS 和 Atom 之间的差异：在 RSS 中，节点值就是实际的链接，而在 Atom 中，则需要使用 href 属性。

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The main reasons are the difference of the method itself and the difference in obtained value theory domain between final safety grade and each level of grade coefficient method.

其主要原因是方法本身存在差别，且等级系数法的最终安全等级取值论域与各层次指标的安全等级取值论域不一致。

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Some methods for dividing continuous attributes in KDD (knowledge discovery in database) and a method based on VDM (value difference metric) are presented.

介绍了在数据库知识发现(KDD)中将连续属性离散化的一些方法，并提出使用值差分度量离散化的算法。

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The indicators of the production of GDP are re-valued at constant prices with the double deflation method where the value added at constant prices is the difference between the value of output and the value of intermediate consumption at constant prices.

UNESCO: Belarus: Report: Part I: Descriptive Section