查询词典 sampling methods

Methods Individual interviews and random sampling method was applied.

采用个别访谈和随机抽样的方法。

Methods Stratified random sampling method was adopted to select 4077 peasant workers from 10 enterprises to conduct questionnaire survey.

采用分层随机抽样的方法对10家企业4077名农民工的职业危害相关知识进行问卷调查。

Methods By simple random sampling,410 floating population were surveyed by questioned on knowledge,attitude and behavior.

方法按单纯随机抽样原则，采用问卷方式调查410名流动人口的知、信、行方面的信息。

Methods:By random sampling, 286 old patients with tumor were enrolled in this study.

目的：比较外周置入中心静脉导管和锁骨下静脉置管在老年肿瘤患者中应用的效果。

Using simple random and system sampling methods, we investigated 1205 disabled persons in Beijing.

本研究采取简单随机、等距抽样等方法在北京市抽取了1205名残疾人进行调查。

Methods A total of 3 594 floating people were selected in the questionnaire investigation with random sampling.

采用随机抽样方法，对广东省3 594名育龄流动人口进行问卷调查。

After analyzing and comparing two kinds of current control methods of three-phase VSR: indirect current control and direct current control, the author employs the latter as main control scheme, which is to control the phase and amplitude of ac-side current directly, by using dual closed-loop control scheme, through sampling currents of phase a and b and converting them by 3s/2r to get active component and reactive component of ac-side current.

分析比较了三相电压型PWM整流器的两种电流控制方法：间接电流控制和直接电流控制。

In order to know Beijing urban residents' consciousness of tax-paying, recognition and sense of individual income tax and the understanding for the burden condition of individual income tax, this paper, on the basis of adopting sampling questionaire investigation method of meeting by chance, takes the methods of descriptive statistics, correlation analysis, etc. to analyze the condition of Beijing urban residents' individual income tax, and points out that the propaganda of the tax system is not good enough...

为了解北京市居民的纳税意识、对个人所得税的认识和感觉以及对个人所得税负担状况的理解，在采用偶遇抽样问卷调查方法的基础上，使用描述统计、相关分析等方法对北京市居民个人所得税状况进行了分析，针对我国个人所得税制的宣传力度不够，多数人不了解个人所得税的计算，以及统计口径不适合目前分析需要的现状，提出统计口径宏观测算方法和统计调查的改进意见，以期对北京市的税收建设有所帮助。

Several representative regions including humid subalpine area, arid valley and the adjacent recovery area and the plateau region of Minjiang riverhead were selected to study the soil nutrient and biodiversity change. Based on field vegetation investigation, soil sampling and analyses, Ecological effects of land use/cover in these regions were discussed. Also in corporation with the social and economic data, the recovery methods of different degraded region were put forward.

研究选取亚高山湿润区域，半干旱河谷区及其恢复区，岷江源头高原面区域作为重点，通过大量的野外植被调查，土壤采样分析，多元统计方法等研究典型区土地利用／覆被变化的生态效应；并根据社会经济资料和调查数据和土地覆被-土壤相互作用规律，提出了岷江上游生态恢复对策。

Results from customer data of a certain Chinese telecommunication company and the fact that the churners and the non-churners have different misclassification costs demonstrate that by altering the sampling ratio of churners and non-churners,this cost-sensitive learning method can considerably reduce the total misclassification cost produced by traditional classification methods.

基于某电信企业的客户数据，及流失客户和非流失客户代价非对称的实际，实证研究结果表明，CS-C4.5通过调整流失类和非流失类样本的比例，大大降低了传统分类算法的样本错分总代价。

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。