查询词典 stratified

Methods With stratified cluster sampling method,1?

采取分层随机抽样方法，对沈阳市2所大学1？

Especially, the combined ratio estimator of domain total is investigated under stratified complemental sampling when auxiliary information can be used.

及该方案在分层抽样下的推广，在有辅助信息可用时构造域总量的分层联合比估计，并给出其方差和方差估计公式，同时我们给出了模拟结果，从模拟结果可以看出，给出的方差估计是估计量方差的近似无偏估计。

Since the reform and opening to the outside world in China, with the constant adjustment of ownership structure and production relation, China has experienced great changes of stratum structure and stratified differentiation, which brings complex impact on political participation mechanism, simultaneous, political participation affects the process of social stratum changes in a degree.

改革开放以来，随着所有制结构和生产关系的不断调整，我国社会阶层分化日益明显，阶层结构发生了重大的变迁。阶层结构的变化给我国的政治参与机制带来了十分复杂的影响，同时公民政治参与也在一定程度上影响阶层结构变迁的进程。

Since the reform and opening to the outside world in China, with the constant adjustment of ownership structure and production relation, China has experienced great changes of stratum structure and stratified differentiation, brings complex impact on political participation mechanism, simultaneous, political participation affects the process of social stratum changes in a degree.

改革开放以来，随着所有制结构和生产关系的不断调整，我国阶层分化日益明显，阶层结构发生了重大的变迁。阶层结构的变化给我国的参与机制带来了十分复杂的，同时公民政治参与也在一定程度上影响阶层结构变迁的进程。

ABSTRACT A new type direct-injection circularly-stratified charge combustion system of gasoline engine is developed in this dissert...

本文设计开发了一种新型汽油机燃烧系统—缸内直接喷射周向分层燃烧系统。

Currently there is an updraft gasifier on the left and a stratified downdraft on the right.

目前有上升气流气化炉在左边（ grateless设计）和分层下沉的权利。

The stratified, downdraft design has a number of advantages over the World War II gasifier designs.

分层，下沉设计了众多的优势，第二次世界大战气化炉的设计。

This new technology has several popular names, including "stratified, downdraft gasification" and open top gasification.

"这种新技术有几个受欢迎的名字，其中包括"分层，下沉气化技术"和"开放顶端气化。

An important issue in the design of the stratified, downdraft gasifier is the prevention of fuel bridging and channeling.

一个重要的问题在设计分层，下吸式气化炉是防止燃料衔接和引导。

The foremost question about the operation of the stratified, downdraft gasifier concerns char and ash removal.

首要的问题是经营层，下吸式气化炉关注烧焦和除灰。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。