直到最近这个比例都被认为是量子测量灵敏度的绝对极限。
Until recently it was thought that this scaling represented an absolute limit on the sensitivity of quantum measurements.
基于极限状态函数矩估计的失效概率计算，提出一种新的可靠性灵敏度分析方法。
Based on the moment estimation of limit state function for calculation of failure probability, a new reliability sensitivity analysis method is presented.
进一步说明背景光子噪声并不是探测器灵敏度的最后极限。
It was further explained that the background fluctuation limit was not the final limit of the detector sensitivity.
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