双尺寸球的最高堆积密度是多少?How much is the densest packing density of binary spheres?

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dense packing of spheres with a radius ratio of 0.64799 and a density of 0.74786.png
图来自https://en.wikipedia.org/wiki/Sphere_packing

如果单尺寸球的最高堆积密度是V,
当小尺寸球的半径与大尺寸球的半径之比R小/R大 趋于零时,双尺寸球的堆积密度达到最高,此时最高堆积密度是
V+(1-V)*V

例如单尺寸球的最高堆积密度是0.74048(这在“水果怎么排堆得最多?”中说过了,https://steemit.com/cn/@chenhs/4deofr),此时双尺寸球的最高堆积密度为0.9326

证明过程可以参见de Laat D. Optimal densities of packings consisting of highly unequal objects[J]. arXiv preprint arXiv:1603.01094, 2016.

双尺寸球的最高堆积密度是多少?How much is the densest packing density of binary sp... | Ecency