用绝对离差度量供电公司的购电风险，建立以风险最小化为目标的多市场购电组合优化模型。

Using the absolute deviation as a risk measurement index, a novel absolute deviation optimal purchasing portfolio model for multiple markets is built in risk minimization target.

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基于聚类的入侵检测方法大都是以距离差异为基础的，而同等重要地依赖所有属性的相似性度量会引起误导。

Intrusion detection methods based clustering are based on distance difference, but to depend on the similarity measurement of all attributes in the same degree tend to arouse misleading.

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财务决策风险是每个生产经营者所必须考虑的问题，风险是通过围绕预期收益可能产生的离差量来度量。

Financial risk should be taken into account in course of manager's decision. The risk is usually measured by deviation around expected income.

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