systematic sample

This thesis demonstrates these changes with methods of systematic sample, quantitative compare, text analysis, etc.

本文采用了系统抽样 、 定量比较 、 文本分析等方法,对这一变化过程进行了初步的论证和梳理.

This essay introduces 4 kinds of Investigation of Citation behavior and motivation, that is Sample Survey 、 Systematic research survey 、 experience research survey and Large-scale research survey.

本文介绍了研究引文行为和引文动机的4种不同的调查法，即抽样样本调查法、系统研究调查法、经验研究调查法和较大规模研究调查法。

The systematic underestimation error of forest timber by using standard sample trees was pointed out.

在指出了森林林分材积计算的标准本方法偏低估计实际材积的系统误差的基础上，提出了两种校正方案。

How can systematic biases be eliminated in sample surveys?

抽样调查可以如何避免系统性偏差?

Among concrete statistics technical research, it makes systematic discussion about some technological details of sample method, data counting, and technology index and so on.

在具体的统计技术研究中，对统计中的抽样方法、数据采集技术、指标推算等技术细节做了系统地探讨。