The canonical data model means fewer maps to write, and also if the data model of either a requestor or a provider was to change, it only affects their specific mapping to or from the canonical model.

标准数据模型意味着所需编写的映射将更少，并且如果请求者或提供者的数据模型要更改，它只会影响到与这个标准模型的特定映射。

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This paper analyzes the change of cultivated land intensive use degree from 1990 to 2006 in China and its influencing factors using canonical correlation analysis.

本文运用典型相关分析方法，对全国1990 - 2006年的耕地利用集约度变化态势及其影响因素进行了分析。

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This paper introduces some classical approaches and some other ways such as in direct change detection adding the gray level classification, mending the m canonical transformation method.

本文在介绍经典变化检测方法的基础上，提出了在直接检测方法中加入灰度自动分类的方法，并进一步对M典型变换做改进。

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