statistical sampling

Profile sampling method, macro-group classification method, and statistical method were used to study the community structure and dynamics of soil insects in ragweeds Ambrosia artemisiifolia and A.

采用分层取样法、大类群分类法和数理统计方法，研究了普通豚草Ambrosia artemisiifolia和三裂叶豚草A。

The benthic fauna community structures of the intertidal zone of soft-bottom of 7 sampling sections in Xiangshan Harbor and Sanmen Bay have been studied with statistical methods.

本文应用数理统计的方法研究了象山港、三门湾软底相潮间带中7个断面的底栖动物群落结构。

Methods Sampling interview, grouping comparison and multi factors statistical analysis are adopted.

方法抽样调查, 分组对比,多因素统计分析.

Techniques and software for statistical sampling, simulation, data analysis and visualization.

用于统计抽样 、 类比 、 资料分析及图像化的方法和软体.

The statistical properties of ocean waves are studied before the analysis of wave spectrum. The equal energy sampling method is used to get simulation curve of the wave height and angle, for long-crested wave, combined with the expression of wave spectrum.

首先，研究海浪的统计特性，并对海浪进行谱分析，结合海浪谱密度表达式，利用等能量采样法对长峰波随机海浪进行仿真，得到海浪波高及其波倾角的仿真曲线。