The acquisition of a range map by image- based analysis or laser scan techniques is still time-consuming and expensive.
通过基于图像的分析或者激光扫描技术来获取场景的深度图， 其代价高昂且十分耗时。
It is also shown that focused geometry arrangements can be employed for measurements of nonlinear refractive index with a higher sensitivity than that of common Z scan techniques.
分析也表明，聚焦几何排布可用于非线性折射系数的测量，并具有比常规Z扫描方法更高的灵敏度。
If these techniques fail, researchers could perform an MRI scan on the container, but this option is expensive and would involve transporting the half-ton coffin to a hospital.
如果这些技术都失败了，研究人员可以设法对棺材使用核磁共振扫描，但此项选择需要昂贵的经费，并会涉及到怎样把半吨重的棺木运送到医院。
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