全自动工业分析仪测试活性炭中灰分的研究

本文采用全自动工业分析仪测试活性炭中的灰分含量,对气体流量的选择、水分和灰分测试方法的选择以及试样加入量等影响因素进行了试验,确定了最佳测试条件和测试范围。该方法不仅快速准确,也减少了人为因素的影响,大大提高了分析结果的可靠性。     

大型软件回归测试用例选择优化策略

在软件回归测试时需要制定测试策略,选择有效测试用例进行测试以避免测试的盲目性.针对大型软件回归测试用例的选择问题本文提出一种新的选择方法并对其进行算法设计和实现.本文运用Uml用例图来描述系统功能模块间的关系,将UML图转换为有向图并通过有向图的遍历算法输出回归测试时需要测试的模块.通过实例研究表明,运用此方法能够显著提高回归测试中测试的效率和准确性,在保证了回归测试覆盖度的同时减少了测试的冗余度.     

电机的绝缘电阻测量和极化指数试验

绝缘诊断测试包括绝缘电阻测量和极化指数测试,是保持电机使用寿命的主要手段,本文对测试设备选择,测试的步骤和测试结果分析等进行了详细的说明。     

浅谈计量测试对于产品质量的保证作用

计量测试技术、设备及计量测试活动,对于产品质量的过程控制和最终产品质量符合性的判定是不可少的。本文对产品质量保证过程中测试设备的选择、检定或校准以及监督管理等方面进行了陈述,系统阐明了计量测试对于产品质量的保证作用。     

EDX-LE型X射线能谱仪测试银饰品含量的条件设置

利用能量色散型X射线荧光光谱仪(XRF)测试贵金属首饰含量,测试结果受选择的测试条件、样品成分、样品形状特征等因素的影响。通过日本岛津公司的EDX-LE型能量色散型X射线荧光光谱仪测试银首饰中的银含量,分析得出样品测试面是否平整、准直器的大小是影响实验测试值准确性的最主要因素,测试时需要选择较大的准直器、选择平整的测试面且多次测量以得出测试结论。     

基于启发式搜索策略的测试选择问题研究

测试选择是测试性设计的最基本步骤之一，本文通过对其数学模型的研究，构造了衡量测试集优劣程度的启发式函数，并由此实现了一种用于测试选择的遗传搜索算法。实例验证表明了该启发式函数的有效性，为测试性设计提供了一个简单有效的方法。     

掺氮吸气剂钡膜分布的测定

本文介绍了掺氮吸气剂蒸散后钡膜分布的测试装置、测试原理、测试步骤、测试结果和所得数据的处理方法。并对设备与材料的要求,Ba标准系列曲线的绘制,吸气剂蒸散条件的选择等进行了讨论。     

液晶显示器夜视兼容测试方法研究

在液晶显示器夜视兼容测试方法上,国内外没有统一的标准,存在着0.3,1,3 mm 3个不同的测试镜头孔径角。由于孔径角选择大小不一,对于同一个液晶显示器,不同公司辐亮度和色坐标测试结果差异较大。为对测试标准进行统一,选择一个通过LED彩灯实现夜视兼容的液晶显示器进行研究,通过配置软件将该液晶显示器夜模式色坐标配置成(0.170,0.495)、(0.190,0.490)、(0.190,0.520)3种不同的色坐标,在这3种色坐标下,通过OL750-NVG系统对其夜视兼容进行测试,测试时,分别选取0.3,1,3 mm不同的孔径角,测试区域分别选择红色子像素、绿色子像素、蓝色子像素,通过对比测试发现:夜视兼容测试时,孔径角不能选择0.3 mm;孔径角选择1 mm或者3 mm。     

夹层结构纸板的力学性能测试方法概述

为了使相关人员能对夹层结构纸板的力学性能测试方法有较为全面的理解和认识,研究了瓦楞纸板、蜂窝纸板和瓦楞复合纸板的力学性能相关测试标准,阐述了各种力学性能的测试原理,分析了各测试标准之间的差异,并介绍了改进夹层结构的剪切性能测试装置的相关研究成果。通过分析可知,瓦楞纸板、蜂窝纸板和瓦楞复合纸板的不同力学性能测试标准的要求不同,且各种力学性能测试标准还需要改进和更新,3种纸板的力学性能测试需根据具体的应用环境选择合适的测试标准和方法。     

流动注射分析仪性能测试方法的研究

研究一种简单可靠的流动注射分析仪性能测试方法,阐述了流动注射分析仪测试用标准物质的选择,测试原理及具体的测试方法、步骤和测试结果的处理方法.该测试方法可操作性强,且测试结果具有较好的可比性和溯源性.     

The European regulations for specimen fabrication prior to performance testing of asphalt mixtures

For fundamental performance testing of asphalt mixtures, specimens have to be produced from an asphalt mixture that is compacted in laboratory. For this purpose, different laboratory compaction methods are available today, which are based on the effects of impact, kneading or rolling action and/or vibration. It is well known that the method used for compaction considerably influences the properties of the specimen, and in turn, the specimen properties significantly influence the outcome of fundamental asphalt mix testing. The choice of compaction method is therefore of utmost importance. Hence, there is general consensus among experts that high priority must be given to the harmonisation of laboratory methods for the production of specimens prior to mix testing. Asphalt mix requirements must not be specified independently from the detailed compaction requirements. In Europe, a harmonised quality assurance system for asphalt mix properties was established recently. In order to guarantee its practicability, also a harmonised approach for the fabrication of specimens for fundamental testing becomes indispensable. In this paper, an overview is given on how standardisation of specimen production has progressed in Europe so far, and the need for further harmonisation is pointed out from a European point of view.     

Über die Wechselwirkung von Werkstoff und Umformung und ihre Erfassung in Versuchen

On the Interaction between Work-Material and Forming-Process and its Investigation by Experiments Experiments are described and discussed for determining material properties before metal forming as well as process parameters during the metal forming operation and workpiece properties after metal forming. Before metal forming “pure” properties of matter have to be determined which in many cases is achieved by standardized testing methods. During and after the forming operation, however, the testing methods of interest are not yet standardized to the same extent. In particular it is necessary after metal forming, to take into account the effect of geometry on the workpiece properties which results into modified conditions for testing material and workpiece properties.     

Stability Programs for Formulation Studies

The theme of this presentation is based on the premise that, despite the existence of differences in specific stability testing protocols between different types of products of the same manufacturer and between similar products of different manufacturers, it is possible to generalize somewhat and to identify elements common to any stability testing program. In terms of stability testing, a drug product may be viewed as passing through a series of distinct, identifiable stages in its development, which represents a progression of stability testing with product maturation. Within this progression, a range of testing protocols, methods and mathematical models may be utilized with each successive program designed to augment the data base of the product and thereby strengthen and expand the conclusions reached during each preceding phase. Differing types and amounts of information are sought at each stage which are important to the assignment of an expiration date, thus giving rise to widely differing concerns and objectives for each phase of the overall stability testing program.     

基于电场作用的混凝土渗透性评价方法研究进展与展望

渗透性是反映混凝土耐久性最为直接的指标,基于外加电场的作用可快速评价混凝土的渗透性。通过对比分析现有基于外加电场作用下的混凝土渗透性评价的测试手段,总结了不同方法的实验条件差异。认为应进一步研究外加电场的作用和混凝土的材料组成所引起的误差,加强评价方法的基础理论研究。提出了通过改变实验条件和引入混凝土电学性质变化率的定量评价方法的设想,以及重点开展在役混凝土结构评价方法研究的建议。     

Stability Programs for Formulation Studies

Abstract

The theme of this presentation is based on the premise that, despite the existence of differences in specific stability testing protocols between different types of products of the same manufacturer and between similar products of different manufacturers, it is possible to generalize somewhat and to identify elements common to any stability testing program. In terms of stability testing, a drug product may be viewed as passing through a series of distinct, identifiable stages in its development, which represents a progression of stability testing with product maturation. Within this progression, a range of testing protocols, methods and mathematical models may be utilized with each successive program designed to augment the data base of the product and thereby strengthen and expand the conclusions reached during each preceding phase. Differing types and amounts of information are sought at each stage which are important to the assignment of an expiration date, thus giving rise to widely differing concerns and objectives for each phase of the overall stability testing program.     

报表自动生成及其在设备检测系统中的应用

针对目前设备检测系统中数据量大,且经常要求以各种报表格式化输出数据信息的问题,分析了VS.NET开发环境下的报表自动生成机制,并提出了适用于两种不同情况的报表生成方法,实现了数据报表的自动生成。在VS.NET开发环境中,利用组件对象模型(COM)来控制外部的Excel应用软件,充分利用计算机强大的数据处理能力,能够实现电力设备检测领域专业报表的生成、编辑、显示和打印等功能。分别以安全阀在线自动调校仪和SF6密度继电器自动校准仪为例,成功将该方法应用于电力设备检测系统中。实际应用表明,该方法具有较强的工程实用性和通用性。     

Effects of nonmodel errors on model-based testing

In previous work, model-based methods have been developed for efficient testing of components and instruments that allow for their full behavior to be predicted from a small set of test measurements. While such methods can significantly reduce the testing cost of such units, these methods are valid only if the model accurately represents the behavior of the units. Previous papers on this subject described many methods for developing accurate models and using them to develop efficient test methods. However, they gave little consideration to the problem of testing units which change their behavior after the model has been developed, for example, as a result of changes in the manufacturing process. Such changed behavior is referred to as nonmodel behavior or nonmodel error. When units with this new behavior are tested with these more efficient methods, their predicted behavior can show significant deviations from their true behavior. This paper describes how to analyze the data taken at the reduced set of measurements to estimate the uncertainty in the model predictions, even when the device has significant nonmodel error. Results of simulation are used to verify the accuracy of the estimates and to show the expected variation in the results for many modeling variables     

Qualitätssicherung an tribologischen Schichten – Eigenschaften und Meßverfahren

Quality management of tribological coatings – properties and testing methods This paper presents several methods which can be used for determining mechanical properties of thin films. Partly they are also suitable for quality management purposes. The theoretical understanding of the results of mechanical tests on thin films is insufficient up to now. Therefore it is substantial to closely keep to defined testing parameters in order to get meaningful results, may it be for comparison between different testers and coating systems, may it be for testing of the suitability of a coating substrate system for a certain appliance, may it be just as a tool of quality management. The most important parameters influencing the tests and the state of standardisation and norms are discussed here at the example of several testing methods.     

Glass-ionomer cements as adhesives

Although glass-ionomer cements are generally agreed to show very good adhesion to a variety of substrates encountered in clinical dentistry, laboratory testing of this property has not proved to be straightforward. In the current paper we review the published literature describing the testing of glass-ionomers as adhesives. We highlight the fact that these materials are employed under conditions of very high humidity and high moisture content that would impair the long-term bond durability of conventional adhesives. We conclude that further work is necessary to improve the understanding of the basic mechanism of adhesion in glass-ionomers and to extend the methods by which adhesion may be measured to include more-complex structures of greater clinical relevance.     

Checking and correcting readings of commercial pH meters

Conclusions In selecting the methods for testing the pH-meter readings, one should, as a rule, give preference to the method which is specified by the testing scheme and consists of obtaining samples of the tested solution, evaluating their pH with a reference pH meter, and comparing its readings with those of the commercial pH meter. In cases when a narrow-range commercial pH meter is tested and standard buffer solutions with pH values which cover the instrument's scale are not available, the above method is the only one which can then be used.The values of the testing method error which are characteristic for this method of checking pH meters are adequately small and virtually do not reduce the precision of measurements.Translated from Izmeritel'naya Tekhnika, No. 2, pp. 58–60, February, 1969.