在双重抽样的第二重中使用顺序统计和“杰克奈夫法”可提高回归估测的准确度和精度。如果成本比高并且材积确定与直径实测的相关也高,则这个方法特别适用于材积估测。当材积与直径都呈正态分布时,所选择和排列样本的间隔是最优的。如果假定分布不正常而且没有相关,这个程序的好处和优越性可能降低。由于提高了效率,排列和样本选择的额外开支应认为是合理的。其他潜在的应用包括生物量研究以及航空照片和野外工作相结合的资源清查。 The use of ordinal statistics and the “JÄKNIVF method” in the second double of the double sampling can improve the accuracy and accuracy of the regression estimation. This method is particularly suitable for volume estimation if the cost ratio is high and the volume determination is also correlated with the measured diameter. When both the volume and the diameter are normal, the spacing between the selected and arranged samples is optimal. If you assume that the distribution is not normal and is not relevant, the benefits and benefits of this program may be reduced. Due to increased efficiency, additional expenses for permutation and sample selection should be considered justified. Other potential applications include biomass research and resource inventories that combine aerial photography with fieldwork.