抽样

Six types of the urban green space were selected to investigate and research in this paper. The main research process and results are given as follows:(1)21 locations and 174 quadrats were investigated totally.

本文对南宁市城市建成区主城区范围内六种类型的绿地进行了调查研究，具体研究过程与结果如下：(1)调查了市区内21个地点，并以典型抽样法设置样方172个。

Through the analysis of the similarity index among quadrats, it was discovered that the replacement of species increased, the similarity among species decreased, and the sampling efficiency improved with an increase in habitat heterogeneity of quadrats.

通过种一面积方程拟合和临界抽样面积的求解发现要达到抽取群落60％以上物种，临界样方面积至少在518.33m^2以上，而草本物种在735.49m^2以上。

Methods: The investigation was made among 5204 persons of 1798 households in 3 city propers of Hebei Province by Cluster and stratified sampling method.

本次调查采用多阶段分层整群抽样的方法，共抽取了全省样本地区3个城区(分别是石家庄市长安区、唐山市路北区、张家口市桥东区)，共调查住户1798户，调查人口5204人。

Considering this disadvantage of contourlet transform and its application in image fusion, a novel algorithm of image fusion was preposed based on Nonsubsampled Contourlet Transform.

针对轮廓波变换的这一不足，提出了一种基于非抽样轮廓波变换的图像融合算法。

Pled,-pling 取样,抽样 I have sampled all the cakes and I like Jane's best.

我尝了所有的蛋糕，我最喜欢简的。

Department as the sam pling fram e.

设 的屋宇单位框作为抽样框，当中包括部

Sampling error and non-sam pling error.

差和非抽样误差的影响。

Methods: People (age 18～69) from the six national minorities were investigated through sam- pling by adopting current sociology, anthropology, the method of delaminating cluster sampling in statisti- cal method and the test system on scientific literacy made by the scientific associa...

采用国际通用的社会学、人类学和统计学方法分层整群抽样方法和中国科协制定的科学素养测试体系和问卷模式，对布依族、苗族、侗族、水族、瑶族和毛南族6种少数民族18～69岁成年人进行抽样调查。

The bootstrap test aims to deal with the possible oversizes when inflation rates contain a large negative moving average root.

当通货膨胀率的移动平均负根很大时，利用自体抽样法处理可能产生过度拒绝现象。

Over the continuously self-improvement and development so many years.We are in possetion of advanced mold equipment,products testing equipment and scientific management system, Our company constanly focuses in customers. Keep"integrity-based" services, our products is Detection by the National Testing Center random testing completely in line with the state standards.

多年来企业不断自我完善和发展，拥有先进的机械生产设备，完整的检测手段和科学管理体系，企业始终奉行&以顾客为中心&的经营方针，以&诚信为本&的优质服务，通辉机械产品经国家检测中心随机抽样检测完全符合国家标准。

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。