论文部分内容阅读
森林分层抽样调查是我队近几年来的主要调查方法。由于调查技术的改进。抽样调查总体日趋扩大,发展至今,抽样总体基本上以林业局为单位。用这样大的总体进行抽样调查无疑将有助于抽样效率的提高,但同时也出现小地区的森林资源的精度尤其是林班蓄积量的精度得不到保证;各林班同一层的蓄积和组成千篇一律;各调查地区之间的差异被人为的拉平了。为了提高调查效率,进一步改进调查方法,保证林班资源有足够的精度,以适应林业局
Stratified sampling of forests is the main method of investigation of my team in recent years. Due to the improvement of investigation techniques. Sampling survey is generally expanding, so far, the overall sampling of the basic unit of the Forestry Bureau. With such a large overall sample survey will undoubtedly contribute to the improvement of sampling efficiency, but also the accuracy of forest resources in small areas, especially the accuracy of forest scale can not be guaranteed; the same accumulation of forest classes and Composed of stereotypes; the differences between the surveyed areas were artificially flattened. In order to improve the efficiency of the investigation, further improve the survey methods to ensure that the forest resources have sufficient accuracy to adapt to the Forestry Bureau