By rotating the symmetry axis of a target into a defined orientation, it is efficient for target recognition to use the feature area distribution as a parameter.
确定了物体对称轴的取向后，可使用坐标变换方法，将轴对称物体的对称轴旋转到某一特定的取向，便于使用特征面积分布作为特征参数进行快速的目标分类识。
This paper introduced the grassland species, quantity and common distribution feature in this area.
本文介绍了该地区牧草的种类、数量与分布的一般特征。
Objective To measure and evaluate the distribution feature of radiation dose at the conventional puncture plane in invasive diagnosis and treatment area, and depict the corresponding isodose curve.
目的测量和评价介入诊疗区域内常规穿刺平面辐射剂量的分布特点，绘制相应的等剂量曲线示意图。
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