The parameter of LFM term estimated by the changing sample ratio processing technology to improve the performance of tracing distance is presented.

提出了应用变采样率技术估计线性调频项参数来减小距离跟踪的误差，提高雷达的跟踪目标性能。

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We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.

讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。

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In this paper, the range glint is analyzed in theory through the model of sample ratio established, and then its physical essence is also expatiated using echo spectrum aberration.

本文通过所建立的采样比率模型对多目标的距离闪烁效应进行了理论分析，并从回波频谱畸变的角度解释了其物理本质。

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The figures are not strictly comparable, because sample surveys show the sex ratio at birth, whereas the census gives it among infants up to the age of six.

ECONOMIST: India's skewed sex ratio: Seven brothers | The

To be fair, Hulbert does note that he was looking at a small sample size and that there have been instances where the CAPE ratio has stayed at high levels before a bear market set in.

FORBES: Are Stocks Cheap Or Expensive?

Braun learned Oct. 19 his sample was positive for elevated testosterone, which he said was at a ratio that was the highest ever recorded in baseball's testing program.

WSJ: Ryan Braun, Milwaukee Brewers Slugger, Says 'Truth Prevailed' - MLB