use yaml_rust2::{Yaml, YamlLoader};
下一步是预测时间 \( t_{1}=t_{0}+\Delta t \) 的系统状态，其中 \( \Delta t \) 是目标重新访问时间。假设飞机预计保持恒定速度，可以使用恒定速度动态模型预测其未来位置。
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Here’s a question; what kind of screens do we see in the 1970’s? The electro-mechanical spinning disc system is incredibly cool, but it puts a lot of limitations on how big your monitor is.
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