定义属性值类型 defining the type of attribute values
设置指定标签属性的值 setAttribute
获取指定标签属性的值 getAttribute
根据属性值定位 arcgis server
返回指定元素属性值 GetCurrentItemExtraIntProperty,GetCurrentItemExtraStrProperty
当您在一个类中拥有一定的属性时，您应该能够利用一些初始值来初始化这些属性。
When you have attributes in a class, you need to be able to initialize these attributes with some initial values.
传统的ID3决策树算法以信息增益作为属性选择的准则值，但是信息增益大的属性并不一定就是有价值的属性。
Information gain is the measurement of the attributes selection in classical decision tree algorithm-ID3, but the attributes with high information gain is not always the valuable attributes.
建立了道路路况评价的属性识别模型，运用熵值法确定指标权重，避免了定权的主观随意性，提高了评价模型的可信度。
The attribute recognition model of road states evaluation was discussed, and the power weight was worked out with the entropy method, which reduced the subjectivity, improved the reliability.
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