Comparison of the N-closest and N-convex algorithms using an 8-colour irregular palette with . Left to right: N-closest, N-convex.
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下游的优势在于市场想象空间巨大，估值弹性高，一旦实现技术突破，有望获得垄断性收益。但风险远高于上下游：盈利周期极长，预计要到2030年才能实现现金流转正；技术路线失败率高，类似Meta元宇宙投入效果不佳的案例并不少见；且资本依赖性极强，一旦融资环境恶化，将直接冲击企业生存。
A third person was on a US K-1 visa - for fiancées of American citizens - the US official said. The boat's owner alleged the vessel had been stolen by an employee.