The basic theory about how to design a in-situ sampling system has been discussed firstly based on chemistry properties and conditions of gas hydrate formation.
分析了设计天然气水合物保真取样系统的理论基础，即天然气水合物的化学性质、天然气水合物的形成及稳定条件。
The phase retrieval problem from single intensity measurement was also discussed in terms of the properties of analytical function or under consideration of sampling theorem.
由单强度测量来恢复相位问题，也有过讨论，可以利用解析函数特有性质或应用取样定理来实现相位恢复。
Sampling designing based on spatial distribution and variability of soil properties is an important issue in recent studies on soil sampling.
利用土壤空间变异特性和空间分布特征进行采样设计是当前土壤采样研究的重要内容。
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