l Projection Vector (投影向量)：该选项用于选择在实体特征中所建立的基准轴。当在Projection Along下拉列表中选择Datum Axis以外的其他选项时，该选项将灰显。
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Centerline Projection Vector 中心线投影矢量
Top Outline Projection Vector 顶部轮廓投影矢量 ; 顶部大概轮廓投影向量
Midline Projection Vector 中线投影向量
first projection vector 第一投影方向
Optimal projection vector 最佳投影方向
efficient projection vector 有效投影向量
image effective projection vector 图像有效投影向量集
High resolution range profile(HRRP) is the projection vector sum of target scattering point echoes acquired by wide-band radar along the direction of radar line-of-sight(LOS). It can provide the range-direction geometric structure and material texture information of the target.
高分辨距离像(HRRP)是宽带雷达获取的目标散射点子回波沿雷达视线方向的投影矢量和。
参考来源 - 基于高分辨距离像的目标识别技术发展现状与趋势·2,447,543篇论文数据，部分数据来源于NoteExpress
New test data was mapped to the projection vector and its fault information was known.
将新增测试数据投影到该向量上，获取新数据故障类别信息。
Through maximalizing the margin, we can obtain the optimal projection vector, and avoid the small sample size problem due to singularity of the within-class scatter.
通过极大化该边界获得最优投影向量，同时避免因类内离散度矩阵奇异导致的小样本问题。
High resolution range profile(HRRP) is the projection vector sum of target scattering point echoes acquired by wide-band radar along the direction of radar line-of-sight(LOS).
高分辨 距离像（HRRP）是宽带雷达获取的 目标散射点子回波沿雷达视线方向的投影矢量和。
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