2、产业端上，海外数据中心“缺电”！美国七大科技巨头签署自主供电承诺，根据国际能源署此前的预测，到2030年，全球数据中心的电力需求将增长一倍以上，达到约945太瓦时。
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In reality it’s rare that we can take a medium’s density as constant throughout its entire area, especially when it comes to clouds or smoke. When a medium has a non-constant density we say that it is heterogenous. A greater range of effects can be simulated if we take this into account when rendering. Unfortunately this can complicate the equation quite a bit. Now is no longer a simple product but an integral over the light ray: