The present paper deals with the signal-to-background ratio and detection limit of derivative spectrometry.

本文比较研究了导数光谱法和常规光谱法的信背比、传统检出限和真实检出限。

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CLIA using acridinium ester derivatives as chemiluminescent label has advantages of low background and high signal-to-noise ratio.

以吖啶酯衍生物为发光标记物的CLIA的特点是：自然本底低和信噪比高。

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Experimental results showed that the algorithm can process with high detection ratio and high precision registration noise-corrupted images and images with complicated background.

实验结果表明，该算法能处理背景复杂和多噪声的图像，具有极高的检测率和精确度。

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What is the risk reward ratio of buying CSCO and INTC at their current valuations with that as the background?

FORBES: Fear And Loathing In Big Cap Tech With Cisco, Intel

Because any leverage ratio is being seen - in Basel and Westminster - as a backstop, or only a bit of background insurance in case the Basel rules prove inadequate yet again.

BBC: If banks are treated as naughty kids...