The observations for long tubular oblique penetration into semi-infinite homogeneous target are interesting.
长管体斜侵彻半无限靶的研究具有重要意义.
The first work was to build an error model of target machine tool by combining the multi-body system theory and homogeneous coordinate transform.
首先结合多体系统理论和齐次坐标变换建立目标机床的误差模型;
There are many merits for focused liquid-filled spherical reflectors: email geometric size, high target strength, excellent frequency property, homogeneous directivity, low cost and easily placed in the sea.
充液聚焦球形反射体具有几何尺寸小、目标强度大、频率特性好、方向性均匀、成本低、海上布设方便等优点,是目前标准反射体中较好的一种。
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