It is important to select suitable sampling space and projection data for reducing cost and improving the image reconstruction efficiency in convolution backprojection algorithm.

利用卷积反投影算法对图像进行重建时，要降低成本，提高成像效率，就必须选取合理的抽样间距和投影数。

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"We effectively use it to rinse our mouth three times and then spit out, " explained Daniel Limonadi, the Curiosity surface sampling phase lead at the US space agency's Jet Propulsion Laboratory (JPL).

BBC: Nasa's Curiosity Mars rover to scoop sand sample

In addition to its Red Star Cafe sampling site, the company is unleashing vendors with funky-looking space age backpacks to dispense Heineken beer to fans in the seats.

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