取样

of this study was based on quantitative methodology, utilizing unstructured interview and purposive sampling.

研究方法是采用质性研究法，使用非结构性访谈及立意取样的方式。

of this study was based on quantitative methodology, utilizing semi-structured interview and purposive sampling.

研究采质性研究法，使用半结构性的访谈及立意取样的方式。

This research adopts semi-structural interview, and ten family day care providers are selected by purposive sampling for interview.

本研究采用半结构式的访谈方式，以立意取样十位在宅保母为研究对象进行访谈。

The sampling system is controlled by an adjustable program timer or by a manual pushbutton.

取样系统用可调程序定时器或手动操作的按纽控制。

In this study, we investigate amphibian species and abundance using visual encounter, automated sound recording, and quadrat sampling methods in different habitats to understand population trends over the years.

本研究拟於2008年以目视遇测、自动录音和方格取样三种方法，对不同类型的栖地进行两栖类调查，以了解族群变动趋势。

MethodSamples were collected by using quincunx to determine the content of heavy metal Zn in the soil of different types of land such as vegetable land,potato land,wheat land and maize land in Baotou suburb.And the soil environmental quality in the research area was evaluated.

方法按照"梅花型"取样，测定包头市郊区菜地、马铃薯地、小麦地、玉米地等不同土地类型土壤重金属锌含量，对研究区土壤环境质量进行评价。

By construction, all of these methods require Nyquist-rate sampling of received signals to estimate a small number of DOA's in angle space, which is very expensive in some applications such as radar or radio astronomy.

通过构建，所有这些方法都要求接收信号的奈奎斯特率取样来估计角度空间的小数量的DOA，这在像雷达或射电天文学之类的某些应用中是非常昂贵的。

Because of random sampling error, it is impossible to learn the exact value of b using only the information in the sample.

由于随机取样误差的存在，我们不可能通过样本知道b 的准确值。

The relationship between the estimated random sampling variance and the number of samples taken was studied.

本文对随机取样方差估计值的精度与样本数目之间的关系进行了研究，提出了相应的理论公式。

We looked at a random sample of 100 students.

我们随机取样一百个学生。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。