查询词典 stratified sample

Migrant workers should be combined with the characteristics of the group, due to lower payment rate and strengthen the social security system in urban and rural areas of convergence, the classification of the establishment of migrant workers the minimum livelihood guarantee system for migrant workers groups and the characteristics of the stratified social security system.

经济合作与发展组织1977年发布的《关于所得和财产避免双重征税的协定范本》和1980年《联合国关于发达国家与发展中国家间避免双重征税的协定范本》是国际税收领域的两个主要法律文本，是各国谈签国际税收协定时的主要基础，在范本中提倡采用两种方法对付资本弱化：（1）正常交易方法。

Migrant workers should be combined with the characteristics of the group, due to lower payment rate and strengthen the social security system in urban and rural areas of convergence, the classification of the establishment of migrant workers the minimum livelihood guarantee system for migrant workers groups and the characteristics of the stratified social security system.

党的十六届六中全会对当前和今后一个时期构建社会主义和谐社会作出了重要部署，把坚持教育优先发展、促进教育公平作为构建和谐社会的一项重要内容，大学校园是和谐社会的一个组成部分，一所学校，只有和谐才能发展，也只有和谐才能不断创新，才能培养出符合未来社会需求的新型人才。

With stratified-charge operation, only the mixture directly adjacent to the spark plug needs to be ignitable.

With有层次充电操作，只有混合物直接地在火花塞附近需要是可燃性的。

This thesis presents the application of improved Genetic algorithm to reconstruct the conductivity distribution of stratified biological tissue by measuring the change of impedance in the coil.

本文主要研究在载流线圈作用下，通过测量生物组织产生的二次场对线圈阻抗的改变，应用改进的遗传算法重构分层生物组织各层电导率和厚度的方法。

Furthermore, the enterprise survey dataset proves increasing dependence on the inflowing laborers and urban labor market is experiencing a process from stratified and differential market to a more competitive and inclusive market.

另一方面，通过分析三个城市的企业调查数据，发现大城市对外来劳动力的依赖性也日渐增强，在外来劳动力不断冲击的过程中，城市劳动力市场也经历了由分层到竞争与融合的转变过程。

The prognostic factors were identified and stratified by univariate and multivariate analysis.

通过单因素和多因素分析筛选并层别化预后影响因素。

Observation of section of filter membrane revealed a stratified cell growth of HPDLF and HGF 2 weeks after inoculation,and TEERs of HPDLF and HGF were 56.14±7.43 and 57.34±7.62Ω·cm~(-2) respectively.Being incubated for 30 minutes, less than 1%of fluorescein sodium reached the inferior filter membrane 2 week after inoculation.

结果：HPDLF及HGF接种1周后细胞基本汇合，到2周时细胞连接紧密且完整，细胞呈复层生长，跨膜电阻分别达56.14±7.4 3及57.34±7.62Ω·cm~(-2)，经荧光素钠孵育30分钟检测细胞旁渗漏小于1%。

Methods With multi-stage stratified random cluster sampling, 3835 persons were selected for observation from 145 608 coal mine employees on the list.

采取多阶段分层随机整群抽样方法从某煤矿集团145608名在册员工中抽取3835人为观察对象，进行问卷调查，现场测量血压、身高、体重、腰围及检验血糖、血脂。

The main research activities of the Department cover the general layout of hydro projects, hydraulics of spillways for high dams, energy dissipation and river bed or bank erosions, flow induced vibration, cavitation and air entrainment, river ice, hydraulic transient flow simulation and control on hydropower project, pumped storage project and long distance water transfer project, optimization of thermal/nuclear power plant and other industrial cooling systems, investigation of the fundamental theory of stratified/mixing flow and its applications, studies on fluid mechanics and thermodynamics of large scale cooling towers, hydraulic field observations for existing projects, development of instrumentation for physical model tests and field observations.

研究领域主要为水利水电枢纽总体布置、高坝泄洪建筑物水力学、消能防冲、流激振动、空化与空蚀、崩岸水力学与岸坡保护、河冰问题、水电站引水系统中的水力瞬变及调压井水力学研究、跨流域调水工程中的规划及水力控制数值仿真、冷却水的工程水力热力问题研究、环境水力学、火电厂水工模型试验与数值模拟研究、火电厂取排水局部泥沙冲淤试验、模型和原体监测仪器的研制和开发、以及过水现场原体监测。

Methods taking whole cluster stratified random simpling method and investigated 2112 school children who aged 6～11 by Achenbach Child Behavior Scale.

应用Achenbach儿童行为量表，采用整群分层随机抽样方法，调查了沿海城市与农村2112名6～11岁儿童。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。