two stage sampling

The malpractice for traditional underground gasification stove is pointed out, the superiority for the long tunnel large section underground gasification furnace is explained, and the new technology craft of two stage, double fire source, inverse direction combustion gasification, multifunction holes, and pressing and pumping combination is introducted, and the test results are analysed.

提出了煤炭地下气化工业性试验的新工艺，指出了传统地下气化炉的弊端，阐述了长通道、大断面地下气化炉的优越性，并对两阶段、双火源、反向燃烧、多功能钻孔及压抽相结合新技术工艺进行了介绍及试验结果分析。

On the basis of material balance, a model of two-stage underground coal gasification in counter directions is built with ideal gasification parameters.

在物料平衡的基础上，建立了两阶段煤炭地下气化方法理想气化参数的计算模型。

This paper introduces the model test on two-stage underground coal gasification(TSUCG) in laboratory.

本文介绍了在实验室内进行的两阶段煤炭地下气化法模型试验,主要研究两阶段地下气化法的可行性,以及产出煤气的热值、组份和气化速度等。

In present period,all the highway projects in our country should carry through two-stage feasibility study.

现阶段,对我国高速公路建设项目均应进行两阶段可行性研究。

In this paper we mainly discuss the first two moments of the ruin time T 、recovery time ~ ( = 1 , 2 , ) and the sum of recovery time ~ in the compound binomial model by renewal method and martingale method when the initial surplurs is u .

主要通过更新方法和鞅方法来讨论复合二项模型中破产时刻T、第i次恢复时间~(=1,2,)及总恢复时间~在初始额u下的前两阶矩,其主要依赖于破产严重性的分布。

The main aim of this paper is to study the first two moments of ruin and recovery times in the compound binomial model.

本文主要研究了复合二项模型中破产时刻与恢复时间的前两阶矩。

The two stage method of the damage identification of highway bridge based on improved genetic algorithms;

基于改进遗传算法的公路桥梁损伤程度标定的两阶段法

This paper presents a method for getting initial basic feasible solution of linear programming problem with an artificial variable,comparing with a traditional two-stage way,it has low computation amount and needs less memory cells for computing,and improve two-stage way simple method.

提出了一种通过对线性规划问题增广矩阵的初等行变换后,引进一个人工变量即可求得初始基可行解的方法,该方法与传统的两阶段法相比,具有计算量小且占有存储空间少的特点,从而简化了二阶段单纯形法。

This paper presents a method for seeking initial basic feasible solution of linear programming problem without using artificial variable,comparing with traditional two-stage way,it has low computation amount and needs less memory cells for computing,so it is an improved two-stage way of the first period question.

提出了一种在不引入人工变量的情况下,寻求线性规划初始基可行解的方法,与传统的两阶段法相比,具有计算量小且占有存储空间少的特点,对两阶段法第一阶段问题作了改进。

Research on extensible policy transformation mechanism based on two-phase transformation;

基于两阶段转换的可扩展策略翻译机制研究

In this paper,a two-phase housing design and customer-participation is put forward.

本文提出两阶段、用户参与的住宅设计思路。

Traditional two-phase sampling algorithms extract the sample data used on data mining from a huge data set.

两阶段抽样算法从海量数据集中抽取样本数据用于数据挖掘,当数据集规模过大时算法效率偏低,当数据集规模过大且为稀疏数据集时抽样精度偏低。