查询词典 sample method

Standard curve and standard addition methods were applied for the quantitative analysis of potassium in tobacco. The main advantage of this method is that the tobacco powder can be directly injected as suspended sample, and has no need for cineration in advance.

该方法最突出的优点是烟草样品不需灰化处理，烟草样品粉末与悬浮剂作用直接进样测试，节约了前处理时间和试剂。

Meanwhile, it could be seen that there does not exist a confidence interval with width less than 0.5 because of the property of Poisson distribution. Based on these conditions, the author mainly carried out research into two aspects of this problem as follows. Firstly, by numerical and theoretical analysis, the author compares some existent confidence intervals, for example,"exact" confidence interval, Wald confidence interval and Bayesian confidence interval, and finds some deficiencies points of the confidence intervals, whose modification version has been proposed .Also, several better confidence intervals such asare also presented .Secondly, for given confidence coefficient and interval width, the author constructs a class of asymptotical two-stage interval estimate procedures. At the same time, under varies restriction of confidence coefflcientent interval width, the optional sample size of the first stage has been computed by numerical computation. The numerical computation shows that the method considered in this dissertation have good properties and applied value.

同时，由于Poisson分布的特性，我们知道不存在其参数区间长度小于0.5的置信区间，基于这些情况，我们主要展开了以下两个方面的研究：一是利用数值计算分析与理论分析的方法对现有的若干置信区间如"精确"置信区间，Wald置信区间，Bayes置信区间等进行分析比较，发现了一些缺陷，针对这些缺陷，我们进行适当的修正，并得到几种性质较好的置信区间如：修正大样本区间Jeffreys原则下置信区间二是针对已给定的置信系数与区间长度，我们提出了一种渐近的两阶段区间估计程序，并利用数值计算的方法，在各种置信系数与区间长度限定下，算出了最优的第一阶段观测次数，大量数据表明，本文考虑的方法性态良好，具有应用价值。

The proposed method was applied to the determination of trace amounts of cobalt in food sample with satisfactory results.

所提出的方法应用于食品样品中微量钴的测定，得到很满意的结果。

Therefore, this paper concludes that this new service quality measurement method is valid in commercial banks college students sample.

因此，本文得出该服务质量测量新方法适用于商业银行大学生顾客样本中的研究结论。

It show the good commutability of the sample among the the two kinds of general methods and the reference method, especially in CRM matrix and self-made matrix. It could be used as a reference material.

说明提纯的GGT具有良好的互换性，该样品具有良好的应用前景，特别是自制基质和CRM基质的样品溶液，可作为候选校准品应用于临床检测。

Discussing the pre-processing of scanning beam and scatter point cloud data, the automatic or interactive filtering techniques and random sample or grid condensability of point cloud data are explained, and a pre-processing method having actual effect is summarized.

研究已有的模型重建技术，如插值和逼近拟合离散点，利用原型的几何及拓扑信息，构建近似模型来逼近原型；基于原型的几何特征和约束的复原为目标，得到优化的CAD模型。

We simulate data from multivariate normal distribution with three different sample sizes, and set different missing rates it was found that the coverage probability for bootstrap method is approximate to the confidence coefficient.

本研究模拟三种型态的多元常态分布资料，并且设定不同的遗失比例，分别进行拔靴法、资料扩增法与多重插补三种方法的信赖区间估计。

The the probabilistic forecasting method of the error between the sample mean and expectation value of the random variable utilizing the central limit theory was researched, then the mathematical formula for the relation between sampling size and variance coefficient of loss of load probability was analyzed. Furthermore, the formulas for the relation between confidence intervals of variance coefficient and sampling size are deduced.

基于中心极限定理深入研究随机变量的样本均值与期望值之间误差的概率预测方法，在此基础上分析失负荷概率(loss of load probability，LOLP)指标的方差系数和样本容量之间的关系表达式，导出方差系数给定时的样本容量置信区间公式及样本容量给定时的方差系数置信区间公式。

By analyzing a chemical noisy signal, a method which can sample continuous signal simply and economically is introduced.

通过分析一例含噪化工信号，介绍一种经济简便的对连续信号采样的方法。

Error analysis of digital instruments on their characteristic parts including sample/holder circuit error and analogue/digital convector error was reviewed in this paper. With the help of some examples and data tables, error origins and the synthetic method were discussed.

评价了数显仪特征部分误差分析方法，包括：采样／保持电路、模数转换单元的误差，并通过典型例子和列表数据分析了多种误差源及其综合计算方法。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。