查询词典 sampling methods

METHODS: 5 184 people of non-manual workers and manual workers in city as well as farmers at different sex, aged from 20-59 years, were selected in Shijiazhuang, Cangzhou and Chengde with random sampling of stratified cluster in July 2000. They were assigned into 20-39 year group and 40-59 years group according to age to perform investigation of their physical work, which composed of strength of grasp, anteflexion of body when sitting, standing with single foot when closing eyes, back pressure, vertical jump, 10 m×4 return run, push-up, sit-up and choice of reaction time, etc. RESULTS: 4 800 people were involved in the result analysis.

于2000-07用分层整群的随机抽样方法抽取石家庄、沧州、承德3个城市不同性别的城市非体力劳动者、城市体力劳动者、农民3类职业人群的20～59岁公民5184名，按年龄分为20～39岁组和40～59岁组两组，对其进行体能测查，测查内容包括握力、坐位体前屈、闭眼单脚站立、背力、纵跳、10m×4往返跑、俯卧撑、仰卧起坐、选择反应时等。

The methods for sampling, analyses and source apportionment of particulate in air were described in detail.

研究了宁波市环境空气中颗粒物的浓度水平、粒径分布、组成特征及污染来源。

Methods Whole group sampling method was adopted, 840 aged 30~70 years residents were investigated in Tongliao, including investigations of questionnaire research, measure stature, avoirdupois, blood pressure, pulse etc.

采用整群随机抽样的方法，抽取年龄在30~70岁居民840人进行调查，包括问卷调查、测身高、体重、血压、脉搏等，对其结果进行流行病学分析。

Kendall Bioresearch Services For professional research and advice on all aspects of Entomology in Agriculture, Horticulture, Agroforestry and Wildlife Conservation. This web site provides a guide to the classification and identification of insects and other arthropods, offers advice on pest control, crop protection, habitat management for insect conservation, experimental design and field sampling methods.

Kendall生物研究服务中心致力于农业、园艺、农林学和野生保护的昆虫学的专业研究、该网站为昆虫和其他节肢动物的确认和分类提供了一个向导，并且在害虫控制、作物保护、为昆虫保护的生境管理、实验设计和野外采样方法等方面给出了忠告。

Methods: The method used direct sampling technique to determinate chloroform, bromodichloromethan, dibromochloromethane, bromoform, which was seperated by tube column, detected by electronic capture detector and determined by inner standard method.

水样直接进样，用毛细管柱色谱分离，电子捕获检测器检测，采用内标法定量，可同时测定水中三氯甲烷、一溴二氯甲烷、二溴一氯甲烷和溴仿。

In the scheme, we use a path time delay estimation method to improve the accuracy of the correla- tion based symbol synchronization methods, and use a tracking loop to lock the symbol synchronization and to track the sampling clock.

在该算法中，我们使用一种路径时延估计的方法来提高基于相关算法码元同步的准确性，并采用一个跟踪环路来锁定码元同步和跟踪采样时钟。

Methods:From 1987 to 1992,hospital-based cluster sampling method was adopted for collecting data.

采用以医院为基础的监测方法收集资料。

Methods Cluster sampling method was used in the 717 persons aged 60 and over in Yanjiao Developing Area.

采用整群抽样方法对河北省燕郊年龄≥ 6 0岁 717名老年人进行问卷调查。

Methods Cluster sampling was used, and epidemiological investigation was carried by means of questionaires.

采用整群抽样的方法，运用自编的调查表进行流行病学调查。

Methods The study was performed by systematic and cluster sampling and questionnaire.

采用系统整群抽样的方法，以填写调查表的形式进行问卷调查。

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。