在水印检测中使用协方差方法，减小了原数据或噪声对水印检测的影响。

Covariance is used to detect watermark, which may reduce the influence of chaos.

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在水印检测中使用协方差方法，尽可能地减小了原数据或噪声对水印检测的影响。

Covariance is used to detect watermark, which may reduce the influence of initial data or chaos in partially.

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也为采用某些数学方法(如协方差描述函数法)进一步研究火箭发射系统的统计性能作了必备的前提工作。

So the study makes an easy way for launching research of MLRS and prepares for applying some mathematics methods (such as CADET) in the statistic field of MLRS.

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