磷钼酸喹啉重量法测定溶液中磷的不确定度评定

对磷钼酸喹啉重量法测定溶液中磷含量的不确定度评定，给出了评定步骤。采用统计方法得到了A类不确定度，利用所获得的各种信息对B类不确定度：包括样品质量、沉淀质量、沉淀包夹杂质量、沉淀损失量等各个不确定度分量，逐个进行量化。从而获得合成不确定度以及扩展不确定度。     

xian钼酸铵分光光度法测定废水中总磷的不确定度分析

对GB／T11893—1989《水质总磷的测定钳酸铵分光光度法》对测定水中总磷的测量不确定度进行分析，找出影响不确定的因素，给出不确定度。     

测量不确定度及其应用分析

本文阐述了测量不确定度的基本概念，并通过实例加以说明。对测量不确定度与测量误差进行了比较分析，可供参考。     

测量不确定度的科学评定及相关概念浅析

本对测量不确定度及误差等相关概念进行简单的分析讨论,主要对测量不确定度评定方法中的B类不确定度评定的基本方法进行了阐述。     

钢筋抗拉强度测量结果的不确定度评定

用微机控制电液伺服式万能试验机测量钢筋的抗拉强度时,为确定测量结果的分散性即测量结果的置信区间,对影响检测结果的诸多因素进行分析,确定不确定度产生的来源,并采用A类不确定度评定和B类不确定度评定的方法,对各个不确定度分量进行评定,再根据各个量的方差和协方差算得合成标准不确定度,最终用扩展不确定表示,给出钢筋抗拉强度测量的不确定度报告。     

测量不确定度原理及在理化检验中的应用第一讲测量不确定度的基本概念及A类标准不确定度

介绍了测量不确定度原理及在理化检验中的应用。就不确定度的定义、分类、评定步骤和方法、报告与表示、有效位数等问题进行了讨论。并对金属材料拉伸试验结果测量不确定度作了详细评定，以作为在理化检验中应用的一个实例。     

实际计量测试中不确定度评定的一些探讨

本针对在实际测量实践中，对不确定度的评价如何着手，对A，B类不确定度评定的划分，B类评定不确定度的评估，以及在实践中如何通过一些实验及数学处理的方法来处理相关性作了一些探讨。     

公法线千分尺示值误差测量结果的不确定度评定

文章采用JJF1130-2005<几何量测量设备校准中的不确定度评定指南>中的方法对公法线千分尺示值误差测量结果的不确定度进行评定.给出了目标不确定度,并根据不确定度误差的来源对测量结果进行分析计算,得到合成标准不确定度.通过对目标不确定度和合成标准不确定度的大小比较来得到最终判据.     

低压电器温升试验的不确定度分析

不确定度是国际公认的用来评定测量结果质量的参数，是报告度量的尺度。准确、合理的不确定度评定是提供正确测量结果的前提和保证。本文以低压电器温升试验的不确定度评定为例，分析了检测实验室对产品进行不确定度评定的方法。     

能量色散X射线荧光光谱法测定PVC塑料中铅、铬、汞、镉、溴含量的不确定度评定

对能量色散X射线荧光光谱法测定PVC塑料中铅、铬、汞、镉、溴元素含量的不确定度进行了评定。分析了测量结果的不确定度由测量重复性、回归工作曲线、标准物质、仪器综合稳定性等因素引入的不确定度分量组成。在对各个不确定度分量进行量化的基础上,通过计算得到测量结果的合成不确定度和扩展不确定度。     

Estimation of Parameters of Universal Distribution of Moments of Failure of Products

A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling.     

Assessment of intakes of mixtures of radionuclides

Australia has several uranium mines and a large number of mineral sand mines, with associated processing facilities. Exposures resulting from these mining and processing operations usually involve intakes of mixtures of radionuclides. This work describes the development of a suite of first order, linear compartment models, based on the ICRP Publication 66 respiratory tract model, and an analytical solution to the decay equations, for assessing the consequences of such intakes. The computer programs based on these models directly compute excretion, organ retention and organ and whole-body doses for intakes of either single radionuclides or any mixture of radionuclides belonging to the same radioactive decay chain. The intake can be via inhalation, ingestion or injection, and can be acute, chronic or of limited duration. The starting concentration and degree of secular (dis)equilibrium can be specified for each radionuclide. No assumptions need to be made about the relative magnitudes of the radioactive half-lives of the different nuclides.     

卧式金属罐容量的测量结果不确定度

本文根据多年的实践检定经验 ,参照JJF1 0 59- 1 999《测量不确定度评定与表示》以及《测量不确定度表达 1 0讲》 ,对卧式金属罐容量的测量结果不确定度进行了评定。     

盐酸浓度不确定度的评估

通过对盐酸浓度标定的过程分析，找出影响结果的各个分量，进行不确定度的评定，按照计量技术规范给出标准的表示法。     

Evaluation of optical properties of highly scattering media by moments of distributions of times of flight of photons

A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue.     

Analysis of the rate of propagation of the wave of change of boiling modes

An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate agreement is demonstrated between the derived relations and experimental data.     

Analysis of anisotropy of properties on the basis of studies of texture of coarse-grained ingots of thermoelectric materials

An analysis of anisotropy of the properties of a Bi₂Se_0.3Te_2.7 solid solution was carried out using construction of demonstrative surfaces for thermoelectric effectiveness and thermal expansion coefficients. It is shown that the texture is an important factor forming anisotropy of properties and technological fitness of ingots for manufacturing modules. Anisotropy of properties based on the studies of the ingot textures obtained using the float-zone method and Bridgman method (growing thermoelectric plates in a flat cavity) was studied.