分层抽样法

笔者以股票和ETF基金为两种资产池选择现货组合，分别以完全复制法、市值抽样法、分层抽样法、逐步回归选择法和最小跟踪误差法计算组合权重。

The author shares and etfs fund for two of the asset pool choose spot combination , respectively by a complete copy method , market capitalization weight method , the stratified sampling method and tracking error method to calculate the minimum combination weights .

产品质量检验的分层抽样法研究

Stratified Sampling for Quality Inspection

方法采用与规模大小成比例（PPS）的两阶段分层抽样法选择了583名城镇居民和429名农村居民，由调查员对调查对象进行一对一的问卷调查。

Methods A two-stage cluster sampling with probability proportional to size ( PPS ) was conducted .

方法：以群体分层抽样法，采用中国身心健康量表、艾森克个性问卷（EPQ）、防御方式问卷（DSQ）、生活事件量表（LES），入学时对541例学生进行一次性测试。

Method : 541 fresh university students selected randomly were tested by China Psychosomatic Health Scale , the Eysenck Personality Questionnaire ( EPQ ), the Defensive Style Questionnaire ( DSQ ) and the Life Events Scale ( LES ) during their registration .

分层抽样法在实验室废液量统计中的应用

Application of stratified ratio estimation in statistics of lab sewage quantity

解结构可靠性问题的改进分层抽样法

An improved stratified sampling Monte-Carlo method to analyze the reliability of structural systems

并在此基础上，运用数学模型和分层抽样法，按照标准宗地的特征和基本标准，设置标准宗地。

Dissertate the method of mathematics and the step to setup the standard plot .

分层抽样法在退耕还林工程水土流失监测中的应用

Application of Stratified Sampling Method to the Monitoring of Soi and Water Erosion in the Land Conversion to Forest Program

方法采取分层抽样法抽取福州地区初一到高三学生810名，选用自编的《中学生父母控制问卷》和《亲子亲合问卷》进行调查。

Method 810 students were investigated with Parental control questionnaire which was developed for the first time and Parent-Adolescent Cohesion questionnaire by group sampling .

铁路绿色通道喷混凝土植生技术分层抽样法在路基水土流失监测中的应用

Application on spraying concrete with vegetation effect in railway slope defending system Appling Streaming Sampling Technique in Monitoring Soil and Water Loss on Railway Slope

采用分层抽样法，从青岛某理工院校抽取被试850名，收回有效问卷809份，有效问卷回收率为95.18%。

Stratified sampling method , from a polytechnic school in Qingdao test samples were 850 , 809 valid questionnaires were valid for the 95.18 percent response rate .

采用分层抽样法，以各层样本平均数、变异数，考虑成本及使用戴明配置来定各层抽样数目。

Adopting the method of sampling and dividing data into several layers , we can get sample averages . Does that make variations ? Taking cost into account , we use Dai-Ming method to decide the layers of sampling to dispose data .

在设置样地对采伐总量调查时，其标志值应为单位面积的实际采伐量，可用总体平均数的双重分层抽样法估计，其分层因子为地貌和林木地。

The marking value should be actual rate by the unit area , it can estimate by method with dual layering and sampling of the general average number , and layering factor as landform and forest site during the survey for total harvesting rate of setting sample plot .

作者以甘肃联合大学学生为研究对象，采用分层随机抽样法抽取样本1000名进行调查。

The authors take the students of Gansu Lianhe University as objects of study , using stratified random sampling method taking samples of1000 .

本文用分层随机抽样法，对北京市十所医院患者进行两次内容相同的重复抽查，以便客观地了解中日友好医院的知名度、服务质量和宣传解释工作的效果。

With the stratified random sampling , repeated surveys were twice used to evaluate the hospital image , the service quality and advertising results .

方法采用分层随机抽样法抽取不同类别高危场所，填写统一的暗娼健康及其影响因素调查表。

Methods Different high risk sites were selected by stratified random sampling , and uniform questionnaires about health and other factors of the FSWs were filled .

方法运用多阶段分层随机抽样法，对广西城市人群7881人进行现场问卷调查和体格检查。

Methods A total of 7,881 urban residents from Guangxi Province were enumerated using the multistage and stratified random sampling method . Questionnaire and physical exam were performed in the sampling population .

方法：用分层随机抽样法确定调查点。用尼龙袋集卵孵化法、顶管孵化法分别对人畜进行查病，用系统抽样结合环境抽样法开展螺情调查。

Methods : Using stratified sampling method to determine the survey places , The schistosomiasis in people and livestock were surveyed by the methods of nylon bag incubation and top - tube incubation .

为此从系统风险控制的角度构造优化跟踪组合，比较了分层抽样复制法、完全复制法和优化复制法构造的指数基金的实际跟踪效果。

According to the point of systematic risk control , the optimal tracking portfolio was constructed . A comparison was made among index funds constructed by stratified sampling replication , full one and optimized one .

采取随机分层整群抽样法对山东沿海居民桥本甲状腺炎（HT）与尿碘水平关系进行调查。

The residents living in Shandong coast were investigated by random layer sampling method for the prevalence of Hashimoto ′ s thyroiditis ( HT ) and their urinary iodine level was determined .

方法抽样方法为分层整群抽样法。

Methods A stratified multi-stage cluster random sampling method was used .

等比（25%）分层整群抽样法从医学及其相关专业抽出515名1~3年级学生进行测试。

Via proportional ( 25 % ) stratify sampling , 515 students from various healthcare majors were sampled and tested .

方法采取分层整群抽样法，抽取15岁以上的城乡居民进行血压、身高、体重测量及问卷调查，共调查城乡居民6665人。

Methods A total of 6665 subjects aged 15 and over in urban and rural areas were selected with stratified and cluster sampling .

方法按照全国统一方案，采用分层整群抽样法抽取湖北省10个县（市）30个调查点，每点调查约500人。

Methods According to national unified plan , with stratified cluster sampling method , 30 spots in 10 counties ( cities ) were investigated and 500 persons were selected in each spot .

采用按比例分配样本额分层随机抽样调查法，研究面对体育与健康课程标准，苏北地区中小学体育软、硬件指标能否适应新课程的发展要求。

By the method of random and layered sampling , the authors explored whether the soft-and hard-ware for physical education in primary schools in Jiangsu are good enough to carry out the new curriculum criterion .

方法：采用查阅文献、分层随机抽样调查法和咨询法对3个省、9个县、27个乡（镇）、81个村的基层卫生机构进行调查分析和可行性论证。

Method : the reading literature , investigation of hierarchical randomization and consultation methods were used to investigate and analyze foot layer health care institutions in 3 provinces , 9 towns , 27 rural areas , and make a feasible demonstration .

其中着重分析了在城市街道绿化树种结构研究中运用分层随机抽样调查法应如何进行分层与如何确定合适的样本量；

At the same time it was analyzed how to stratify the stratums and define the optimal samples by the stratified random sampling in the study of street tree populations , and some formulas were introduced for calculating the parameters of the urban street tree populations .

方法采用横断面调查设计与分层多阶段随机抽样法获取样本，采用BHemoglobin血红蛋白仪，取指末梢血10μl测量Hb含量。

Methods Cross-sectional study and randomly sampling were used . Blood was collected on tip of finger and the level of hemoglobin was measured using B-Hemoglobin photometer .

方法采取分层随机整群抽样法选择6～11岁儿童2280名，通过Rutter儿童父母问卷、DR及相关因素调查表，比较DR与非DR儿童BP检出率及相关因素。

Methods Through Rutter 's children Behavioral parents ' scale , DR and relative factors checklists , 2280 children from 6 to 11 years old were collected to compare BP test rate and relative factors of children with DR and without DR.

方法采取分层随机不等比例抽样法，抽取镇安、木城、腊勐3个乡9个行政村，逐户调查村民疟史情况。

Methods An epidemiological survey was carried out house by house according to stratified random varied proportion sampling , nine villages of three towns were chosen .