The background radiation from cosmic rays increases with altitude, from 0.3 mSv per year for sea-level areas to 1.0 mSv per year for higher-altitude cities, so for best results use this on a plane or in outer space
The data (in /sysroot/ostree/repo/objects) is stored in a dedicated directory that contains all system versions. Each version is identified by a hash, similar to Git.
硬氪了解到，公司核心团队源自德国弗劳恩霍夫激光技术研究所（Fraunhofer ILT）——这里是金属3D打印主流技术激光粉末床熔融（LPBF/SLM）的发源地。公司创始人沈李耀威师从该技术的发明者Meiners博士，并在研究所从事相关研发工作近十年，负责过多款行业旗舰级常规金属打印设备的设计项目，在金属打印的设备、软件及工艺方面积累了丰富的经验。。91视频对此有专业解读
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Most digital images intended for viewing are generally assumed to be in sRGB colour space, which is gamma-encoded. This means that a linear increase of value in colour space does not correspond to a linear increase in actual physical light intensity, instead following more of a curve. If we want to mathematically operate on colour values in a physically accurate way, we must first convert them to linear space by applying gamma decompression. After processing, gamma compression should be reapplied before display. The following C code demonstrates how to do so following the sRGB standard:，这一点在服务器推荐中也有详细论述