查询词典 sampling methods

It is verified that th action's mean value of the expected value by simple radom sampling is equal to one by stratified radom sampling.

证明了在期望值决策准则下，用等概率分层随机抽样得到的方案收益期望值的均值，与用简单随机抽样得到的相同。

Students will learn Descriptive Statistics, Probability and Random Variables, Probability Distributions, Sampling and Sampling Distributions, Statistical Estimations, and Hypothesis Testing in Statistics.

同学们将在统计学中学习叙述统计量的意义与计算、机率与随机变数、机率分配、抽样与抽样分配、统计估计、假说检定等基础统计方法。

By the introduction of the theory of sampling constant presented by Ingamells and Switzer, the stratified sampling for segregated bulk materials were studied.

将Ingamells-Switzer取样常数理论引入分层性固体物质的取样研究，提出了分层取样的最优化设计方案，推导出了各层取样量及分层取样方差极小值计算公式。

Systematic Process Sampling -- This type of sampling may be used when you are looking for patterns in your process data or making conclusions about a process.

过程系统抽样--这种抽样技术应用于发现过程的变化特征或对过程进行判定，举例，在呼叫中心，可能需要每5个电话抽一次。

In natural thermoluminescence of soil respect, it has determined the stratgraphy of sampling, and proved anomaly shape has little change with the sampling density.

在土壤天然热释光测试方面，确定了取样层位，研究了取样密度变化对异常形态的影响。

Results1. Content of arsenic in serum raises with dose adding, time of pouring medicine and time of blood sampling prolonging. Thin layer chromatography indicates that there is toadfish in medicine serum of Liu-Shen-Wan.2. The suppressive rate of medicine serum of Liu-Shen-Wan on HL-60 cell raises with adding of dose and time of pouring medicine and prolonging of blood sampling.3. Gimsa dying assay, in situ end-labeling method and flow cell machine all exhibits: HI-60 cells dealed with Liu-Shen-Wan medicine-serum present typical apoptosis morphology.

结果：1 血清砷含量随着给药剂量、给药天数增加和采血时间的延长而升高；薄层色谱表明六神丸含药血清中有蟾酥成分。2 六神丸含药血清对白血病细胞的抑制率，随给药剂量、天数增加和采血时间的延长而升高3 吉姆萨染色、流式细胞仪检测、原位末端标记检测均证明六神丸含药血清能诱导HL-60白血病细胞凋亡。

The author presents a new sampling method based on a lot of experiments. Tractability of sampling rate and the speediness of this method is also confirmed.

作者在大量实验的基础上提出了IP包头标识字段取模抽样方法，该方法具有抽样比率易控制、效率高的优点。

In this paper,the truncated error of trapezium methodis analyzed under ideal state of electrical power parameters,a sin function,when sampling digital measurement and the relationship between the error and the amount of sampling points is offered.

对电力参数的理想情况采样数字化测量的典型算法的截断误差进行了分析，给出了误差与采样点数的关系；根据国家关于电能质量和公用电网谐波的标准规定，对非正弦状态下的误差也做出了符合实际的估计；在电网正常情况下截断误差与采样点数的关系与理想波形时相同。

This paper describes the load weight is a sampling system of truck weights for the weight sampling.

本文介绍的是一种负载重量采样系统，对车载重物进行重量采样。

The sampling valve was opened by force of springs; the lid-shaped turn-up of sampling diaphragm invented by the author enlarged the effective flow area for sample gas out of the combustion chamber.

取样机构动力由弹簧提供；作者发明的取样膜片盖状折起加大了样气流出燃烧室的流通面积。

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。