Abstract This paper discusses about the scatter of the intensity of vibration signals of paper prints and analyses their mechanical parameters applying the theory of covariance functions. It is an important practical problem, before starting printing process of colour prints, expecting the correct position of fixed raster points, to adjust the paper sheet tension between printing machine sections. The results of measuring the intensity of vibration signals at the fixed points were presented on a time scale in the form of arrays (matrices). The estimates of cross-covariance functions between digital arrays result in measuring the intensity of vibrations, and the estimates of auto-covariance functions of single arrays were calculated upon changing the quantization interval on the time scale. Application of normed auto-covariance and cross-covariance functions enables reduction of preprinting experimental measurements, which saves time (what is actual for industry). Tension force depends on the mechanical properties of the paper sheet and print. These characteristics depend on paper type, layers of printing colors and positioning of the coverage. In the calculation, the software Matlab 7 in batch statement environment was applied.

中文翻译：

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纸质印刷品的振动测量和数据分析

摘要 本文讨论了纸张印刷品振动信号强度的散射问题，并应用协方差函数理论分析了其力学参数。在开始彩色印刷品的印刷过程之前，期望固定光栅点的正确位置，调整印刷机部分之间的纸张张力是一个重要的实际问题。测量固定点振动信号强度的结果以阵列（矩阵）的形式在时间尺度上呈现。数字阵列之间的交叉协方差函数的估计导致测量振动强度，并且在改变时间尺度上的量化间隔时计算单个阵列的自协方差函数的估计。规范自协方差和互协方差函数的应用可以减少预印实验测量，从而节省时间（工业实际情况）。张力取决于纸张和印刷品的机械性能。这些特性取决于纸张类型、印刷颜色层数和覆盖范围。在计算中，应用了批处理语句环境下的软件Matlab 7。