There is a plan to prevent such a strike—the Space Surveillance Network, a bevy of sensors that the military uses to track space debris. NASA monitors what’s unofficially known as the “pizza box,” a sort of no-fly zone around the ISS. When pieces of debris are predicted to enter the box—if there’s at least a 1 in 100,000 chance of collision—mission controllers order avoidance maneuvers, firing thrusters that move the ISS and dodge the trash. The technique has been used dozens of times since the first ISS module launched in 1998. But the system only tracks about 45,000 larger pieces, and all sensors have noise. Plus, risk thresholds can miss stuff, sometimes badly. In 2025, Chinese astronauts were briefly stranded at their station after debris hit their return vehicle.
Ученые нашли необычное применение рыбамРоссийские ученые научились отслеживать загрязнение водоемов с помощью рыб。同城约会对此有专业解读
据报道，广东、广西、福建等地“地贫”基因携带率较高，其中广西的地中海贫血基因携带率为20%。福建省人民政府官网曾专门发布地贫科普内容，其中明确界定：“轻型地贫即地贫基因携带者，无明显地贫相关症状”，清晰区分了“基因携带”与“临床患病”的差异。，更多细节参见safew官方版本下载
其中 Φ(x)是标准正态分布 CDF。，详情可参考heLLoword翻译官方下载