查询词典 representative sample

In this paper,on the basis of theoretically describing mathematics model of the optimum sample plots in certain monitoring area,systematic research and analysis had been carried out through realitic instances and sampling problem of the optimum sample plots had been solved effectively.

该文在理论描述特定监测区域最优样地数学模型的基础上，通过实例进行了系统研究与分析，有效解决了最优样地的抽样问题，所得结果可用于指导生产实践。

Some troubles emerge when we use regression estimator in such a case:in a continuous survey research,when the prior sample and the present sample are independent and they have different elements,we can not compute the regression coefficient.

作连续调查研究抽样时经常用到回归估计。如果前后两个样本相互独立，并且它们所包含的元素不同，就无法直接计算出回归系数。

4 X y Sample regression line, sample data points

样本回归线，样本数据点和相关的误差估计项

Most of the AFMs scan sample under a stationary cantilever. These AFMs only can test small samples, because the size and weight of the sample is restricted by the size and resonance frequency of the tube piezoceramics scanner.

常见的原子力显微镜多采用样品扫描方式，因为样品尺寸和重量受到传统的管状压电陶瓷扫描器的限制，它只适合小样品的测试。

The interference method for determination of refractive index has many advantages, such as easy-producing sample, extensive testing range, and the reutilization of sample.

因此，不断的寻找新的测量方法来满足技术发展的需要，一直是光学测量的重要研究任务之一。

Riffle division method: a riffle is a kind of non-mechanical sample divider, which is usually fed manually. The sample is divided into 2 equal parts by riffle, with one retained and one rejected.

二分器缩分法：二分器系非机械式样品缩分器，通常用手工给料，样品通过二分器被分成二等份，一份保留，另一份弃去。

The surface morphology was studied by the AFM also.Though the average size of grain and the RMS(root-mean-square) value of the two samples is diffe-rent,comparing sample A with B, the result shows that sample A is more smooth.

通过原子力显微镜，对生长在两种衬底上薄膜的表面形貌做了观察，其晶粒的大小与表面粗糙度有一定的差别，表明二者都是以柱状形式生长的。

The essay reviews previous study on this topic and A-share listed firms that have periodically rotated auditors during the period form 2003 to 2005 will be selected as research sample. Basing on whether or not the listed firm changes the accounting firm, the sample will be classified into two group—internal auditor rotation group and external auditor group.

本文在回顾国内外重要文献的基础上，选取2003-2005年进行审计师定期轮换的A股上市公司作为研究样本，并将其按是否同时变更会计师事务所分为内部轮换和外部轮换两类，使用调整后的截面Jones模型估计的操纵性应计利润绝对值计量盈余质量，并将其作为审计质量的衡量指标，对定期轮换与审计质量之间的关系进行了实证检验以分析定期轮换制度的实施对审计质量的影响。

We detected Fibrobacteres in the rumen sample (3.33%) but not in the enriched sample.

在水牛瘤胃内容物中，丝状杆菌占3.33%，但在富集培养物中未被检测到。

Sample and Hold Circuit The sample and hold circuit is used to take a narrow-band measurement of a time-changing signal and to hold that measured value until reset.

采样保持电路采样保持电路，是用一个窄波段测量时间变化的信号，并认为测值，直至复位。

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。