The distribution of area, perimeter and number character of patch types is unequal;

各斑块类型拥有的面积、周长、斑块数等特征分布不均衡；

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Optimization of feature selection, we select area, perimeter, long axis, short axis, Euler number, geometric moments, and a total of 12 feature parameters as input vector.

优化特征选择，选定面积、周长、长轴、短轴、欧拉数、几何矩等共12个特征参数作为神经网络输入向量进行分类试验。

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The research results show that the green patch's temperature influence area and degree increase with the increase of green patch's area, perimeter and shape index.

研究结果显示：绿地斑块对周边温度的影响范围及降温程度随其面积、周长和形状指数的增大而增大。

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Local fishermen are restricted from sailing beyond the designated area's perimeter, several dozen miles outside the main port.

CNN: Seychelles' gunboats keep pirates from 'blue gold'

At the start of each experiment the group cuts a fire break along the perimeter of the area.

ECONOMIST: A new experiment is setting the Amazon on fire

Authorities late Sunday located the second inmate and said a security perimeter had been set up around the area where 33-year-old Danny Provencal has been found.

NPR: 2 Inmates Escape From Quebec Jail In Helicopter