Radar imaging must obtain an extent of target spatial spectral-domain sampling, and the filling of spatial spectral domain is in direct connection with the quality of imaging result.
雷达成像需要获得目标空间谱域一定范围和密度的采样以重建目标图像，目标空间谱域的填充方式与雷达成像的质量有直接关系。
Chapter 4 mainly illuminates safety sampling technique, including theory of corer tube stability, qualitative analysis of parameters of corer releasing and a new type connection of plug pin.
第四章介绍了取样器安全性准则，主要包括保真取样器稳定性理论及取样器释放参数的定性分析及新型销轴式连接方式。
Chapter 4 mainly illuminates safety sampling technique, including theory of corer tube stability, qualitative analysis of parameters of corer releasing and a new type connection of plug pin.
第四章介绍了取样器安全性准则，主要包括保真取样器稳定性理论及取样器释放参数的定性分析及新型销轴式连接方式。
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