1. rectangular是什么意思

1. 矩形的：细胞单元可以是矩形的(rectangular),也可以是星形的(radial). 直方图通道是平均分布在0-1800(无向)或0-3600(有向)范围内. 作者发现,采用无向的梯度和9个直方图通道,能在行人检测试验中取得最佳的效果.

2. 长方形：长方形(rectangular) 或信封形同样保暖能力的充化纤的睡袋比充鹅绒的睡袋重得多,压缩后体积也大得多. 而且没用几年化纤睡袋就扁了,失去很多保暖能力.好的鹅绒睡袋能用一二十年.化纤睡袋好处是便宜,而且湿了后也有一定的保暖能力.鹅绒睡袋受受潮影响大一些,

3. 长方形(矩形)：件(支、把、个)Piece | 长方形(矩形) Rectangular | 椭圆形 Oval

1. 长方形的;矩形的
    Something that is rectangular is shaped like a rectangle.

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    e.g. ...a rectangular table.
           长方形桌子

1. having a set of mutually perpendicular axes
    meeting at right angles

    e.g. wind and sea may displace the ship''s center of gravity along three orthogonal axes
           a rectangular Cartesian coordinate system

    Synonym: orthogonal

2. having four right angles

    e.g. a rectangular figure twice as long as it is wide