请输入您要查询的字词:

 

单词 sampling methods
释义
sampling methods

Geology and Earth Sciences
  • Techniques for collecting representative sub-volumes from a large volume of geologic material. The particular sampling method employed depends on the nature of the material being sampled and the kind of information required. Common methods are: (a) random sampling, a non-systematic or haphazard distribution of sampling locations; (b) systematic sampling, a regularly spaced distribution of sampling locations; (c) stratified sampling, a sequentially spaced, vertical distribution of sampling locations based on sampling each stratigraphic unit in a succession; (d) grab sampling, the collection of material using an externally controlled, mechanical grab (a method often used when sampling the sea floor or the surface of another planet); and (e) chip sampling, the collection of borehole drilling chips that are carried to the surface by lubricating mud and are representative of the material traversed by the borehole.


随便看

 

科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。

 

Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号 更新时间:2024/12/26 1:50:18