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1)  colorimetric estimation
比色估计
2)  specific volume estimation
比容估计
3)  ratio estimator
比率估计
1.
Based on the proportion estimate and the mean estimate in sampling technology,the authors of this paper put forward the method of ratio estimator in sampling technology and makes a detailed analysis of method.
在抽样技术比例估计与均值估计的基础上,提出了抽样技术的比率估计法,并对其作了详细的分析,同时,通过具体问题的讨论,说明了比率估计法所具有的优越性;针对各个样本比值有比较大的差别时所产生的不稳定性,运用聚类分析的方法提出了具体的比率估计法的改进公式,减少了噪声数据的影响,得到了较高的准确度。
2.
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
讨论多阶段抽样比率估计及其样本量选择的问题 ,给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式 。
4)  ratio estimator
比估计
1.
In this paper, the ratio estimates in TwoStage sampling with the PPS sampling were compared and the condition that the ratio estimator is superior to PPS estimator was obtained in the paper.
对二阶比估计与二阶PPS抽样方法进行了比较,给出了比估计优于PPS抽样及PPS抽样优于比估计的条件。
2.
In this paper, the ratio estimates in cluster sampling with the PPS sampling were compared and the condition that the ratio estimator is superior to PPS estimator was obtained in the paper.
对整群比估计与PPS抽样方法进行了比较 ,给出了整群比估计优于PPS抽样的条
3.
It is proved that under specific conditions,the ratio estimator of multivariate two-phase sampling complemented with single auxiliary information is better than the simple estimator of multivariate simple random sampling.
本文研究了多元二相抽样,并且在多元二相抽样中添加了一元辅助信息,定义了采用一元辅助信息的多元比估计,得到了采用一元辅助信息的多元二相抽样的比估计量及其性质。
5)  ratio estimation
比估计
1.
The paper discusses the ratio estimation with systematic PPS sampling and simulates the model with the data of the First Agricultural Census in China on the base of introduction of the ratio estimation with simple random sampling.
本文在介绍简单随机抽样比估计的基础上,对PPS抽样设计的比估计进行了系统的研究,并使用了第一次农业普查数据对方法进行了模拟。
2.
Ratio estimation which is a kind of estimation using auxiliary variable is a nonlinear estimation.
比估计就是利用辅助信息的一种估计,它是非线性的估计。
6)  the ratio estimate
比估计
1.
For the ratio estimate in two-stage sampling, the bias and mean square errors(MES) of the estimater value have been obtained, and the estimater value of the MSE has been given.
给出了二阶比估计量的偏差、估计量的均方误差以及均方误差的估计 。
补充资料:比色标准溶液
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性质:亦称色标溶液。(1)在比色分析中,为测定某物的浓度,制备含有已知浓度目的物、并使之显色的溶液。也可用色素溶液代替含目的物的有色溶液,经过比色,求得受试样品的目的物含量。(2)在色度分析中,利用显色物质色度与浓度关系,制备一组色标溶液,与目的物的色度比较,求得目的物的色度。例如,常用的加德纳(Gardner)色标,即是用氯铂酸钾及氯化钴和三氯化铁配制成1~18号色标,广泛用作液体化学试剂、树脂、涂料等颜色的测定。

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