Methods The passengers of 6 trains were surveyed systematic sampling .

方法对6趟旅客列车乘客进行 抽样问卷调查，调查结果进行统计 分析。

The technique for selecting the data was a combination of systematic sampling and convenience sampling .

在数据搜集过程采取了 系统 性 抽样与便利抽样相结合的方式。

Methods To use the means of the equal capacity stratified cluster sampling simple random sampling and systematic sampling to identify objects and 1080 inhabitants were surveyed by uniform questionnaire .

方法使用全国统一的艾滋病知识态度调查问卷，采取等容量分层整群、单纯和机械 抽样相结合的方法，对1080名城乡居民进行问卷调查。

A comparative study of systematic sampling and regression estimate for controlling total volume was conducted .

对森林资源 规划设计 调查（二类 调查）中 系统 抽样和回归分析技术控制总体蓄积的 方法进行了比较研究。

Comparison of variance estimators under systematic sampling design

系统 抽样时方差估计量的比较&一种新的比较准则

Compare and Analyse Between Systematic Sampling and Stratified Sampling

系统 抽样与分层抽样的比较分析

This paper deals with the estimation of population mean in systematic sampling by use of auxiliary information in order to improve the accuracy of the estimate .

讨论了 等距 抽样中，如何利用辅助信息改进总体平均值的估计，以达到提高估计精度之目的。

The questionnaire is designed on the basis of Job Descriptive Index ( JDI ) . In a way of cross-sectional study systematic sampling is applied to the survey .

参照工作描述指标（JDI）有关维度结构理论，设计调查问卷；采用截面研究法，通过 系统 抽样方法，共发放问卷2937份，回收2867份，回收率97.62%。

Systematic sampling and simple random sampling procedures were used for the first and second stages respectively .

第1阶段采用 系统 抽样，第2阶段采用简单随机抽样方法。

Comparison of ecological entropy with random and systematic sampling

随机与 系统 取样的生态学信息量比较

After systematic sampling and analysis the result is confirmed that hydrogen and helium in the gas of coal bed universally are against methane in concentration .

经过 系统 采样和分析，结果证实煤层瓦斯中氢气、氦气与甲烷一样普遍存在；易突出煤岩释放氢气的浓度较高；

Regression estimation of population mean in systematic sampling

等距 抽样中总体均值的回归估计

Second during the process of selecting sample data we make use of the stratified sampling first systematic sampling later to ensure representativeness of the sample .

第二，在选取数据样本时，我们采用先分层，再 等距 抽样的方法，选取了数据样本，保证了样本的代表性。

The Post-Stratification Techniques of Systematic Sampling for Domain Estimation

系统 抽样事后分层情形下域的估计

Investigating survial rate in afforestation and regeneration by systematic sampling

系统 抽样 法在更新造林成活率调查中的应用

DESIGN : Systematic sampling investigation .

设计： 整 群 抽样调查。

Based on the zonal model of compression faults systematic sampling has been carried out in nine examples including analysis of 36 samples .

依据压性断裂分带模式，对九个实例进行了 系统 取样，共分析样品36个。

During the course of cluster sample verification systematic sampling and stratified sampling 's accuracy are prior to simple random sampling ' s.

群样本检验中， 系统 抽样群样本检验和分层随机抽样群样本检验的效果优于简单随机抽样群样本检验。

Systematic sampling is used to get the 341 listed companies as the sample .

本文采用 等距 抽样 的 方法，抽取了341家上市公司。

The current nutrient status of crops can now be determined through the systematic sampling of plants as appropriate times .

作物当时的营养状况，可在适当时期对植物的 系统 采样进行营养分析。

Methods Systematic sampling method was used in field Oncomelania investigation and laboratory and field simulating drowning methods were also performed to observe survival of Oncomelania .

方法应用 系统 抽样法进行现场查螺，现场和实验室模拟水淹实验观察钉螺存活情况。

Methods Every month for one year Oncomelania snails were collected by using the systematic sampling method of the chessboard style and distinguished from infected snails by means of the crushing method .

方法在江苏省一江滩连续12个月用棋盘式 系统 抽样法逐月采集钉螺，以压碎法鉴别捕获钉螺的感染性；

Line transects of systematic sampling were used to survey the fundamental characteristics of the environmental variables in the study area .

通过 系统 取样的样线法调查整个研究区域环境变量的特征。

Methods 150 residents who had been live in Linli Hunan by systematic sampling were interviewed by using questionnaire .

方法采用问卷调查方式 系统 抽样调查湖南省临澧县居民150人，指数法综合评价。

Methods The multi-stage sampling method i.e. cluster and stratification sampling combined with systematic sampling was applied to conduct a household survey of residents in communities . The data of survey were recorded with database of Epi data and analyzed statistically with analysis software of SAS .

方法采取多阶段抽样方法，即整群分层抽样和机械 抽样相结合的方法对社区居民进行入户调查，调查数据采用EPIDATA数据库录入，SAS分析软件进行统计分析。

Methods A sample of 791 cases with symmetry systematic sampling from 39446 medical records in a certain Third Grade and First Class general hospital between July 1 and June 30 was gained the discharge diagnosis and the codes of the sample were checked one by one .

方法对某三级甲等综合医院2003年7月至2004年6月的39547份出院病历总体进行对称 系统 抽样，得到791份样本，对每一样本的出院诊断及其分类编码逐一核查。

Based on the basic stuctural performance function combined updated systematic sampling and antithetic sampling used exponential polynomial method and JC method the composite sampling semi-analytical method was presented to assess the system reliability of structures .

本文提出的复合抽样半解析方法，基于最简单的结构功能函数，结合运用改进的 系统 抽样和对偶变数抽样、指数多项式法以及验算点法来求解结构体系的可靠度。

Two hundred subjects were selected by systematic sampling from non-English-major sophomores in Southwest Jiaotong University .

调查对象是西南交通大学二年级非英语专业的学生，经 系统 抽样，选取男女学生各100名完成问卷。

Based on the field survey data obtained from May 1996 to June 2003 the resources of waterfowl in Hubei province of Central China including species diversity distribution and population number were studied with systematic sampling such as direct count quadrat and special survey methods .

1996年5月至2003年7月，使用直接计数 法、 样方法和专项调查法研究了湖北省湿地 水禽资源，包括物种多样性、分布和种群数量。

The efficiency of regression estimate was usually higher than systematic sampling .

通常情况下，回归估计的效率高于 系统 抽样。