查询词典 stratified sample

Corneal epithelial cells formed unilaminar and stratified layers and cellular joins.

角膜上皮细胞可形成单层和复层，细胞间连接紧密。

However, for unstably stratified turbulent flow, some typical statistical quantities, e.

同时，这些结构也影响着湍动能和湍流热输运特性的变化。

The calculation results of some examples are given. In the unstratified case, the cake cross section at any point is circular. When the flow is stratified, buoyancy cause the wake, which initially grows at the same rate in all directions, to collapse in the vertical direction and flatten out horizontally producing a very wide and thin rectangular shape.

在稳定层化海洋中，潜艇尾流以圆锥形增长；在非层化海洋中，初期尾流也以圆锥形增长，但在浮力作用下，尾流垂向增长崩溃，然后以又薄又宽的近于矩形截面增长，最后垂向尺度趋于常值。

It is found that the spatial distribution of atmospheric aerosol is ununiform in horizontal direction and stratified in vertical direction.

观测资料表明，在大气温度和湿度水平均匀、层结稳定的情况下，气溶胶粒子浓度水平分布不均匀，而且垂直方向上也并不随高度单调递减。

When stratified by type of leukoplakia , the response was more pronounced in homogeneous lesions: complete regression was seen in 16 of 28 (57%) subjects with homogeneous leukoplakia , 2 of 8 with erythroplakia , 2 of 4 with verrucous leukoplakia , and 0 of 4 with ulcerated and nodular lesions.

以口腔黏膜白斑病的种类分层时，同类口腔黏膜白斑病的反应更加显著：28位同类口腔黏膜白斑病患者中，有16位(57%)得到完全的逆转；8位口腔黏膜红斑病患者中，有2位得到完全的逆转；4位口腔疣性黏膜白斑病患者中，有2位得到完全的逆转；8位溃疡性和结状损害患者中，没有任何人得到完全的逆转。

Data were analysed by logistic regression and generalised estimating equations, and stratified by maternal and paternal allergic status.

数据通过对数回归分析和广义估计方程进行处理分析，而且根据母亲和父亲的过敏状况进行了分层。

Methods Multi-stage stratified random sampling was used, and the combination of centralizing investigation and enter-household investigation were used to collect data.

方法采用多阶段分层随机抽样的方法确定调查样本，以集中调查和入户调查相结合的方式收集数据。

It is pointed out that in three-phase stratified flow the existence of water damps the waves generated at the oil-gas interface, and there is roll wave in peak zone of the neutral stability curves.

在给出油气水三相分层流分类的基础上，使用一维三流体模型对具有代表性的流动类型——包含油水乳状液的分层流进行了分析和求解，确定了相分率、压降和其它流动参数的计算方法。

By introducing one of stratified ocean models: two layer ocean and multicolored wave mech- anism of second order water wave, the problems of diffracting effects caused by second order multicol- ored wave are analyzed.

引入二层海的层化海模型及二阶水波的多色波作用机制，对层化海条件下的二阶多色波的绕射作用问题进行了分析。

In stratified analyses, a greater effect of IPV on asthma was noted among children living in disarrayed or deteriorated housing or among children whose mothers were experiencing housing hardship.

分层分析显示，存在居住环境混乱或住房条件老化或母亲经历住房困难的儿童，IPV对哮喘的影响较大。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。