查询词典 sampling methods

For larger populations, there are two methods of surveillance that are most applicable: systematic random sampling and cluster sampling.

对于数量较多的人群，有两种最适用的监督方法：系统随机抽样和分组抽样。

METHODS: Grounded on the indophenol blue photometric method, the way of breath ammonia sampling, and endpoint judgement for breath ammonia sampling were systematically studied.

以靛酚蓝比色测氨法为基础，对呼气氨采集方法以及采气终点判断方法等进行了系统研究。

Total inorganic phosphates and orthophosphate were determined with satisfactory sensitivity for real sample analysis, and with sampling rates of 40 and 80 per hour, respectively. The obtained sampling rates were much higher than the existing automatic methods (20 per hour).

总无机磷酸盐和正磷酸盐进样频率分别为40和80样次/小时，远远高于现有的自动分析方法（20样次/小时），方法的灵敏度能够满足实际样品分析的要求。

Methods Convenience sampling and snowball sampling techniques were applied to recruit MSM participants in comnmnity, and every subject was investigated by pelion in-depth interview.

方法在社区通过"滚雪球"抽样和方便样本招募男男性接触者，对其进行个人深入访谈。

Among probability sampling methods, what kinds of research conditions are more appropriate for each sampling method

什麼样的情况下，适合用机率抽样方法简单随机抽样有4种方法：1。简单随机抽样2。分层随机抽样3。系统抽样等距抽样

Methods Population Proportional to Size sampling method was employed in sampling.

方法2005年11~12月采用分层、三阶段与规模成正比的容量比例抽样方法获得调查对象，采用统一调查问卷由统一培训的调查员入户进行面对面调查。

Methods The multi stratified grouping random sampling method and the proportional sampling was used.

本次流调方法与全国第四次流调方法基本一致，采用分层整群等比例随机抽样方法。

Because there were many occasional species in the desert and the distribution of many species were dependent largely on the habitat, the paper concluded that neither the methods of sampling line and nest method for all species nor the sampling method of the pattern of plum blossom quadrat for the herbaceous species could be suitable for observation in the desert.

由于沙漠物种偶见种多，频度和密度较低，并且分布的环境特异性强，认为对沙漠植物群落观测，样线法、巢式样方法以及对草本观测的梅花样方法均具有一定局限性，建议对草本和灌木物种多样性观测，在确定合理的布样方向基础上，以4m 4m为基本样方。

The questionnaire method and the interview menthod were used to gain the tourist data, the quota sampling method was used in sampling survey, the principal component analysis method was used to measure the various variables, the statistical methods such as linear regression analysis, multivariate linear regression analysis, single factor variance analysis and logistic regression analysis were used to analyzes the relationship between various variables.

具体来说，在获取游客数据时采用了问卷调查法和访谈法，在抽样调查时采用了配额抽样方法；对各变量进行测度时使用了主成分分析法；在分析各变量之间相互关系时采用一元线性回归分析、多元线性回归分析、单因素方差分析及Logistic回归分析等统计方法。

Eight hierarchical clustering methods including single linkage method, complete linkage method, median linkage method, centroid method, unweighted pair-group average method, Wards method, flexible-beta method and weighted pair-group average method were combined with three sampling strategies, random, preferred and deviation sampling to develop 24-core collections.

川最短距离法、最长距离法、中间距离法、重心法、不加权类平均法、离差平方和法、可变法和加权配对算术平均法等8种系统聚类方法，结合随机取样法、优先取样法和变异度取样法等3种取样方法，发展了24个水稻核心种质库。

Fostering the concept of multi-culture firmly and mastering the development of advanced culture correctly are conductive to resisting terrorism, separatism of nationalities and ultraism of religion, which is of great academic theoretical, immediate and profound historical si...

牢固树立多元文化的理念和正确把握先进文化的发展方向，有助于在世界范围内自觉地抵制恐怖主义，民族分裂主义和宗教极端主义。不仅具有重大的学术理论意义，而且也具有重大的现实意义和深远的历史意义。

But if anyone walks in the night, he stumbles, because the light is not in him.

11：10 若在黑夜行走，就必碰跌，因为那光不在他里面。