基于常规试验设备的HASS技术在航空电子产品上的应用

高加速应力筛选（HASS）技术是一种新型的试验技术,试验效率高,能有效保障产品的可靠性。介绍了高加速应力筛选的基本原理和典型的HASS过程,然后将HASS应用于某航空电子产品,提出了一种基于常规试验设备的HASS方案。根据环境应力筛选（ESS）与基于强化试验设备的HASS技术,给出了基于常规试验设备的HASS初始剖面制定过程,并从理论上验证了该剖面的有效性,筛选验证结果表明该剖面具有安全性。     

典型飞机结构加速腐蚀试验方法研究

针对典型飞机结构的局部腐蚀环境开展了加速腐蚀环境谱及加速腐蚀试验方法研究,采用A和B两种加速腐蚀环境谱进行了对比试验。结果表明,在飞机结构加速腐蚀环境谱中采用铜加速乙酸盐雾试验,不仅具有明显的加速腐蚀作用,使试验历程大大缩短,而且能够较好地再现典型飞机结构的腐蚀损伤特征。     

进口空气质量监测仪器验收方法的研究

以进口仪器为例，以进口空气质量监测仪器验收方法的规范化率先进行了初步的研究，提出了一系列仪器检验的规范化方法。首先，以下TE42C型NO－NO2－NOx分析仪和PM10采样仪为例进行具体说明，然后给出了规范化验收的一般步骤。并且给出了在进行仪器验收时所用的专门设计的记录表格。该方法不仅可用于进口监测仪器的验收，同时可用于其它监测与分析仪器的常规性质检。     

总线类测试系统的技术现状及发展方向

归纳了当前测试系统的主流总线架构形式,对当前各种总线架构的测试系统性能及应用进行了分析,同时对当前测试系统的主要软件设计技术现状进行研究。在此基础上,提出了未来复杂测试系统研制的主要方向,要满足未来复杂测试任务需求,应加大应用LXI总线构建大型高精度混合型分布式测试系统。硬件方面,将VXI/PXI/PXI-E/PCI-E/USB3.0总线进行组网集成,满足大型应用测试中低速、高速、高精度的数据采集与传输测试需求;软件方面,应按照行业标准需求,研制功能完备、满足特定行业应用的软件系统。     

Setting up the criteria and credit-awarding scheme for building interior material selection to achieve better indoor air quality

Methods, standards, and regulations that are aimed to reduce indoor air pollution from building materials are critically reviewed. These are classified as content control and emission control. Methods and standards can be found in both of these two classes. In the regulation domain, only content control is enforced in some countries and some regions, and asbestos is the only building material that is banned for building use. The controlled pollutants include heavy metals, radon, formaldehyde, and volatile organic compounds (VOCs). Emission rate control based upon environment chamber testing is very much in the nature of voluntary product labeling and ranking, and this mainly targets formaldehyde and VOC emissions. It is suggested that radon emission from building materials should be subject to similar emission rate control. A comprehensive set criteria and credit-awarding scheme that encourages the use of low-emission building material is synthesized, and how this scheme can be practiced in building design is proposed and discussed.     

火灾过程中火源热释放速率模型及其实验测试方法

详细分析了目前常用的火源热释放速率模型，并对其特点和参数范围进行对比讨论；同时还介绍了基于氧消耗原理的热释放速率测试方法和基于质量损失速率的热释放速率测试方法，并给出了部分实验测试结果。     

水上个体救生具性能测试方法的比较研究

对比研究了国际标准化组织 (ISO) ,国际海事组织 (IMO) ,英国标准 (BS) ,美国军事标准 (MIL) ,日本工业标准 (JIS) ,中华人民共和国标准 (GB) ,中华人民共和国交通部标准 (JT)等各类标准中关于水上个体救生具的整体救生性能、主体材料和部件性能、属具性能的测试方法 ,在此基础上 ,笔者提出了我国水上个体救生具在性能检测方面的研发方向。     

某电容器加速贮存寿命试验设计研究

加速贮存寿命试验设计是设计一个最优的试验指导方案.一个好的试验方案可以提高模型参数估计精度和寿命外推的准确性,可以缩短试验时间、提高试验效率.本文在探讨该电容器的失效机理分析的基础上,在从应力加载方式、应力类型、水平、参试样品、截尾方式、测试、判据等多方面开展试验方案的设计.     

热解吸气相色谱双通道检测空气中TVOC

探讨了通过气相色谱仪双通道检测室内空气中总挥发性有机化合物的可行性.建立了前、后双通道的苯、甲苯、乙酸丁酯、乙苯、苯乙烯、对(间)二甲苯、邻二甲苯、正十一烷等9种典型有机污染物的外标曲线,各组分相关系数R2为0.9995～1,并通过各自的标准曲线来计算其标样考核结果,对比标样真实浓度值,验证前、后双通道的准确性以及相互...     

Determination of the performance limits of flame arresters at increased oxygen concentrations

This investigation shows how an increased oxygen concentration influences the performance limits of crimped ribbon deflagration flame arresters at elevated pressures. An evaluation of the maximum experimental safe gap (MESG) as reliable criterion for describing the performance limits under non-atmospheric conditions is given. Measurements of MESGs and flame arrester performance tests were performed. Various fuel/oxygen/air mixtures containing ethylene and propane were used as testing gases. Former studies on the pressure dependence and the influence of oxygen on the MESG were initially confirmed. Furthermore, performance tests using a commercial deflagration flame arrester revealed that such a flame arrester may prevent flame transmission also at non-atmospheric conditions within a limited range. For various oxygen concentrations the performance limits were reached at the same MESG. Hence, it can be assumed that a flame arrester possesses a device- and fuel-specific maximum experimental safe gap for a specific gas mixture in different concentrations and at different pressures. This performance-related maximum safe gap can be used as a parameter for estimating and describing the performance limits of a flame arrester. It offers an attempt to simplify the testing and qualification of deflagration flame arresters for non-atmospheric conditions.