The difference between these two scenarios may have implications for how these supernovae can be used as "standard candles" — objects of a known brightness — to track vast cosmic distances.

这两种图景之间的差异可能会与超新星被当成“标准烛光”(也就是亮度已知的天体)来测量遥远宇宙距离的方式有关。

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When the detection range of the IR thermal imager is calculated by using NETD, the target radiation brightness difference must be calculated in the operating wave band.

在采用NETD计算红外热像仪的探测距离时，需要计算目标在热像仪探测波段范围内的辐射亮度差。

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Common kernel function RBF only has a local characteristic, with the measurement of the difference in brightness according to the Euclidean distance between pixels of two types.

常用的核函数rbf只具有局部性，根据像素间欧氏距离作为两个类别的亮度差异性测量。

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