查询词典 sampling method

In order to solve the problem that the charge valve core s lose rubber or lose rubber partly at batch tests and sampling tests, the method of molding and conglutinating charge valve core s were studied.

针对充气阀阀芯在批次和典型试验后分解出现的掉胶、脱胶问题，对阀芯压制方法、橡胶与阀芯基体的粘接等进行了研究。

To find some abstract criterions for governments functional department to make the theoretical foundation of relevant policies, can effective reduction and controlling the size of population of the . disadvantaged groups.This paper carries on the sampling research by the questionnaire survey and individual cusses interviews method to four social vulnerable groups, such as the poor farmers, the city farmer workers, the city unemployed worker and the disable or sick.

本文采用问卷调查法和个案访谈法对我国贫困农民，城市农民工，城市下岗工和残疾人等四类弱势群体进行抽样研究，运用数理统计法对调查数据进行统计，结合有关专家的建议和近几年来国内有关的文献资料，首先对我国弱势群体的总体体育消费状况进行了分析描述，然后分别对我国四类(弱势农民群体、城市农民工群体、城市下岗工人群体、残疾人群体等)弱势群体的基本特征、体育消费现状、体育消费倾向和体育消费发展趋势等四个方面的相关数据进行比较分析和论证。

Vena orbitalis posterior plexus blood collection method, Exsanguinated before the inferior vena cava blood(Around the trachea to the needle into the subclavian), cardiac puncture blood collection methods(To the left oblique line to the right into the needle enter the subcutaneous on the fourth and firth rib), femoral artery and venous blood sampling means(enter injector orientation to heart proximal femoral artery and venous in 1～3 mm) and tail end approach were used in 5 groups respectively.

眼眶后静脉丛的采血法，前腔静脉采血（靠近气管至锁骨窝处进针），心脏穿刺采血法（倒数第4～5肋间刺入），股动静脉采血法（在股动静脉处向心端1～3mm处为最佳穿刺点）和尾尖采血方法。

The analytical characteristic and the regulation for the direct analysis of advanced ceramic in slurry sampling/fluorinating assisted electrothermal vaporization-ICP-AES were studied in detail; The possibilities of simultaneous determination for elements with different volatility were inspected also, a high sensitive and effective method for the direct analysis of ceramic powder has been described.

详细研究了悬浮体制样/氟化电热蒸发-ICP-AES直接分析先进陶瓷材料的分析性能及其规律性，考察了同时测定陶瓷材料中不同挥发性的痕量元素的可能性，提出了一条高灵敏、高效率的陶瓷材料直接分析新途径。

By computer simulation, the effects of the quantizing error on power measurement of the mixed sampling method are analyzed.

通过计算机仿真，分析了量化误差对混合采样功率测量方法的影响。

According to the principle of stratifying and sampling, the author investigated the upper-grade primary school students and their parents in urban area of Changchun using the method of questionnaire.

本文根据多段抽样的原则，对长春市城区高年级小学生及父母进行了问卷调查，共发放问卷1800份，其中学生和父母各900份。

This paper gives a brief introduction of research work on the fabrication measurement of rotation accuracy of machine tool main spindles. The following problems have been studied, stability of a new type base circle generator, mechanical method of eliminating eccentricities, precision fast eccentricity-regulating equipment, program of autosof tware for checking delaytime number for improving sampling accuracy and its au...

本文通过试验研究，讨论机床主轴回转精度工业测试的一些主要问题：新型基圆发生器的稳定性；机械消偏法及快速高精度调偏心装置；提高采样精度的自动软件检测延时数程序及自动定标技术；干扰的产生原因及消除方法；主铀的工业测试规范。

A stratified sampling method is used to estimate the cotton field...

设计了满足生产应用的全国作物面积遥感监测抽样运行方法

The article introduces two arithmetic of partial differential,and analyses the method of using compare the current vector of coupler breaker,and provides sampling arithmetic and vector arithmetic.

母线微机保护装置已发展的比较成熟，装置通用的选择故障母线的方法是利用总差动和分差动相配合；文中介绍了利用分差动选择故障母线时的两种算法，分析了利用母联电流方向比较元件选择故障母线的方法，并从瞬时值方面和向量值方面提供了两种算法。

Methods a cluster stratified sampling method was used to chose 3 989 pupils from six schools of different levels in xiamen. they were investigated with conners parent symptom questionnaire.

采用整群分层抽样法抽取厦门市6所不同层次的小学一～五年级学生3 989名为调查对象，应用conners量表进行调查，dsm-ⅳ诊断标准确诊。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。