2) Baseline survey
本底调查
1.
Practical problems that are found in baseline survey on the resettlement villages in Xiaolangdi reservoir area are presented.
介绍了小浪底库区移民本底调查中遇到的实际问题 ,并根据不同的情况采取了相应的调研方法 ,取得了良好的调研效果 ,胜利完成了小浪底库区移民社区的本底调查工作。
4) bottom characteristics exploration
底质调查
5) bottom trawl survey
底拖网调查
1.
There are two groups of methods,namely,the designbased methods and the model-based methods that are commonly used for the analysis of bottom trawl survey data based on swept area method.
底拖网调查(扫海面积法)的数据处理方法主要有两大类,即基于调查设计的方法(design-based method)和基于模型的方法(model-based method),其中基于调查设计的方法在我国的应用较为常见,而基于模型的方法则较少应用。
2.
Based on the data collected from bottom trawl survey conducted in the East China Sea in 2005,present paper dealed with the spatial distribution characteristics of Psenopsis anomala,and estimated the mean of stock density used with two methods,namely the Δ-distribution and the design-based method.
海洋生物的分布具有不均匀性,从而造成底拖网调查数据显著偏斜。
补充资料：调查
对事物进行系统周密的考察和了解：要了解情况，唯一的方法是向社会作调查，调查社会各阶级的生动情况。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条