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以双能 γ射线透射法用于煤矸石在线识别系统中的组分测量为例，对由被测物组分变化引起的动态测量误差的成因进行了阐述，并就各相关参量对误差的实际贡献作了分析讨论，得出用缩短采样周期时间来有效减小误差的结论．
Taking dual-component γ-ray transmission method for component measurement of on-line identification system of coal gangue as an example, the causes of dynamic measurement error caused by the change of components of the tested object are described. The contributions are analyzed and discussed, and the conclusion is drawn that the shortening of the sampling cycle time can effectively reduce the error.