概率抽样

严格πps抽样方案在不放回不等概率抽样方案中的可容许性

Admissibility of Strict π ps Sampling Scheme in Class of Unequal Probability Sampling Scheme Without Replacement

方法采用KishGrid抽样方法，将抽样家庭按家庭成人数进行分层，在层内进行等概率抽样。

Methods Households were stratified by the number of adults in the household and Kish Grid sampling method was used to perform equal probability sampling within each stratum .

本文列举了logistic回归的在不等概率抽样条件下进行参数估计的方法，证明了神经网络模型在不等概率抽样条件下修正输出的方法。

The paper present the methods to fit logistic model and neural network model under unequal probability sample design .

方法：采用按人口比例概率抽样方法（pps）抽样，对居民食用碘盐监测结果进行分析。

Methods : By population proportion sampling ( PPS ), we monitored the result to analyze household ′ s edible iodized salt .

方法依据该地区人口学资料，计划调查8257人，按规模大小成比例概率抽样（PPS）的方法随机抽样以确定抽样人群。

Methods A population of 8257 people based on local demographic data was chosen by means of PPS ( Probability ( proportional ) to size ) randomly .

采用随机概率抽样方法拟合了非球形粒子的散射相函数，并与Henyey-Greenstein（H？G）经验公式的相函数拟合方法进行了比较。

Phase function of non-spherical particles is fitted by random probability sampling method , and it is compared with the Henyey-Greenstein ( H ? G ) empirical formula .

[方法]按容量比例概率抽样（PPS）法，调查630名2001年1月1日至2003年12月31日出生儿童的四苗及乙肝疫苗接种情况。

[ Methods ] We investigated 630 children bored from January 1 in 2001 to December 31 in 2003 to understand EPI and hepatitis B vaccine coverage rate according to pps .

方法采用按容量比例概率抽样（PPS）方法，在江苏省常住人口中抽样，对其中≥10岁的6854人进行眩晕问卷调查、纯音测听和耳科检查。

Methods A total of 6854 persons aged 10 years and over were selected by the methods of probability proportional to size ( PPS ) and had a questionnaire survey about vertigo , pure tone audiometry test and ear examination .

在建立了计及感应电动机与ZIP负荷的综合负荷模型的基础上，运用概率抽样技术处理负荷水平和负荷组成的不确定性问题，通过一系列概率评价指标实现系统电压稳定性的概率评估。

On the basis of synthetic load model that involves induction motor and ZIP load , probabilistic sampling techniques are employed to cope with these uncertainties mentioned above , and voltage stability is evaluated in the form of a set of probabilistic indices .

方法按照容量比例概率抽样（PPS）法抽样，检查1200名8~10岁学生甲肿率、智商、尿碘和家中盐碘，并辅以600名5年级学生和150名家庭主妇的健康教育问卷调查。

Methods Goiter was examined in 1 200 pupils aged 8-10 and whose IQ , urinary iodine and salt iodine were examined by the sampling method of Probability Proportion to Size ( PPS ) . 600 pupils and 150 housewives were investigated by health education questionnaires .

方法自1995年开始，每2年按人口比例概率抽样法（PPS）抽取30个县，检查8~10岁学生甲状腺、尿碘和家中盐碘及五年级学生健康教育问卷调查。

Methods Since 1995 , we have chosen 30 counties to detect 8-10 years old pupils ' thyroid gland , urinary iodine , salt iodine and do health education questionnaire among 5 th grade students by population proportion probability sampling ( PPS ) every two years .

方法采用人口比率概率抽样法（PPS），检测盐碘、儿童尿碘及儿童甲状腺肿大（甲肿）率。

Methods According to " National Iodine Deficiency Disease Surveillance Project ", the children of 8 to 10 years were sampled by probability proportional to size ( PPS ) method and were tested for goiter rate in 8 ~ 10 years old children , iodized salt and urine iodine .

采用容量比例概率抽样法（PPS法）对10个省会城市市区各抽取1200名学龄儿童，进行B超法甲状腺体积、尿碘、智力三项指标的调查，对中国城市儿童的碘营养状况做出评估。

In order to assess iodine-nutritional status of school-aged children in cities of China , thyroid volume by ultrasound , urinary iodine and intelligent quotient ( IQ ) were examined in 12000 school-aged children selected from 10 big cities by using PPS method ( 1200 from each city ) .

方法采用非概率抽样法整群抽取某农村中学初中生147名，应用匹兹堡睡眠质量指数（PSQI）和Epworth嗜睡量表（ESS）分别进行调查，用SPSS10.0统计软件包对资料进行分析。

Methods 147 junior middle school students living in rural areas were taken out by non-probability sampling . Pittsburgh Sleep Quality Index ( PSQI ) and Epworth Sleepiness Scale ( ESS ) were used to investigation . SPSS 10.0 statistical package was used for these analyses .

论整群不等概率抽样技术

On Cluster Sampling Technology with Unequal Probability Discussion on Sword Skills

目前使用的两种抽样的基本方法是概率抽样和非概率抽样。

The two basic sampling methods in use today are probabilistic and non_probabilistic sampling .

等概率抽样群体演化算法的隐含并行性

Implicit Parallelism in Evolutionary Algorithms under the Condition of Sampling Populations with Equal Probability

通过非概率抽样中的方便抽样方法选择访谈对象，以结构式访谈收集资料；

Convenience sampling and structural interview were utilized respectively for selecting respondents and gathering datum .

与其他概率抽样方法相比，自适应抽样最终抽取的样本数更稳定、更可靠，并给出了最终样本数的概率分布。

The variance of sampling size is more stable than those of other probability sampling schemes .

概率抽样用统计学的推断来说明样本的准确性。

Sometimes called random samples , probability samples allow statistical inferences about the accuracy of sample estimates .

结合概率抽样策略和差别矩阵构造出一个动态约简算法。

Combining the max rate sampling strategy and the discernibility matrix together creates the dynamic reduct algorithm .

结果显示随机概率抽样方法拟合的相函数与散射相函数间的方均根差更小。

The result showed that the root-mean-square of Phase function fitted by random probability sampling method is smaller .

概率抽样的备择方案

Alternative to probability sampling

采用故障枚举和概率抽样相结合的算法，分前后台实现了并行计算。

An algorithm integrating the fault enumeration and probabilistic sampling is established and carried out by parallel processing .

方法采用非概率抽样的方法对吉林省几所不同级别医院的医务人员进行调查，重点了解护士及护工在医院工作场所遭受暴力的情况。

Methods The workers in some hospitals of Jilin Province , especially nurses , were investigated by nonprobability sampling .

使用概率抽样的比例较少，尤其简单随机抽样运用的数量则更加少。

The use of probability sampling was relatively small , particularly the use of simple random sampling is less than the quantity .

本研究主要立足于大连地区，并且以当地的大中型超市为研究对象，通过非概率抽样的调查法对大连地区的消费者进行了调查。

This research takes the medium and large supermarkets in Dalian as the object of study , and investigates the consumers in Dalian by non-probability sampling .

当前我国民意调查报道中存在三个主要问题：一是非概率抽样使样本代表性受质疑；

At present , the public opinion survey report of our country has three main problems . Firstly , non-probability sampling makes sample 's representation untrustworthy .

方法用容量比例概率抽样方法对江苏省40个调查点进行听力和耳疾调查（WHO方案），抽取年龄≥60岁的老年人共计1261人进行统计分析。

Methods Using the probability proportion to size ( PPS ) method , 1261 people over 60 years were investigated in 40 clusters in Jiangsu Province with the WHO protocol .

针对输运修正引起的自散射截面导致的负概率抽样现象，提出了一种非负修正方法，并用基准计算验证了该方法的正确性。

Because of the phenomenon that the negative self-scattering cross sections cause the negative probability sample , a nonnegative corrected method is put forward and validated by the benchmark problems .