载人航天器系统测试智能通用化数字接口设计

航天器系统接口种类和数量繁多,以往的测试系统需要针对卫星接口进行专门地面测试设备接口设计,工作量大,通用性差。为提高系统设计效率,本文提出了一种基于PXI总线技术的高性能通用数字接口模块设计方法,在给出模块结构的基础上,详细介绍了该模块的硬件主体及接口设计原理,并给出了软件设计策略及用户接口函数的定义。该模块具备多通道、大数据量同时收发的功能,已成功地应用于多个型号的测试系统。经过应用验证,该模块能够满足测试系统的使用需求。     

基于虚拟测试仪器的诊断技术及在VMTS中应用

故障诊断是一门交叉学科,广泛应用于各个领域,在飞机维修虚拟训练系统(VMTS, Virtual Maintenance Training System)平台基础上,提出基于虚拟仪器进行测试、故障定位的仿真训练策略,构建了基于需求的虚拟测试仪器模型框架,并在VMTS系统中得到应用。通过虚拟测试仪器与推理模块协同配合的方法解决了维修虚拟训练过程中普遍存在的故障诊断类型套路化问题,并且能够完成复杂状态下的故障诊断任务,满足各种故障诊断训练要求,最后以尾桨故障诊断为例,证明该方法的可行性。     

试飞机载测试系统一体化验证平台的设计与实现

为提高智能车对多车道的实际道路车辆行驶环境的适应性,提出了一种基于三车道模型的车辆检测方法。方法在预处理的基础上利用极角及位置约束的Hough变换得到可能的车道线信息并利用消失点对车道线进行筛选;利用三车道四线模型对车道线进行匹配;对于每条车道,分别利用车辆灰度信息对车道线内车辆进行识别,并利用视频的连贯性对车辆识别结果进行修正并跟踪车辆。该算法通过对车道线的二次筛选,提高了三车道模型的准确率,进一步提高了对于不同车道车辆识别的正确率。实验结果表明,在结构化道路上,对于不同路况,算法均具有较好的实时性和鲁棒性。     

航天器间信息流测试验证实践

为解决航天器间信息流验证问题,文章提出三步走策略;首先采用了航天器信息流设计标准中的信息流分析方法;然后,从测试验证角度提出了对信息流描述的延伸方法;最后,借鉴软件测试设计理论等诸多方法,识别测试用例,并在此基础上完成航天器间信息流测试验证;该方法已在某深空探测器的测试设计中应用,保证信息流验证完备性的同时,能够有效增强测试用例设计的合理性及有效性,是一种十分有效的信息流验证思路。     

基于CppUnit的虚拟试验单元测试研究

虚拟试验是通过大量平台软件验证实物试验的可行性,达到“以实验虚 以虚辅实 以虚预实”的目的。这对平台软件的稳健性具有较高的要求,软件测试是提高软件产品质量的重要手段,而其中的单元测试是对软件模块的功能测试。CppUnit主要用于实现对软件的单元测试,本文基于CppUnit提出了一种应用于虚拟试验平台软件的单元测试方法,实现了对平台软件功能的单元测试,平台使用者在软件开发阶段不仅能较好地验证软件的稳健性,而且能提高虚拟试验验证的效率,为实物试验提供参考依据。     

An instrument for measuring supply chain flexibility for the textile and clothing companies

Supply chain flexibility (SCF) represents the capability of firms to respond to unanticipated changes in customer needs and competitor actions. Given the growing research interest in flexibility strategies, the development of a valid and reliable instrument to measure organizational responses toward environmental uncertainties or risks is imperative. However, no systematic and scientific research has been conducted to develop such an instrument. The present study adopts a comprehensive and rigorous procedure to develop a multifaceted scale for SCF through an empirical investigation. The results of a confirmatory factor analysis suggest that SCF can be operationalized as a second-order factor model comprising four dimensions, namely: sourcing flexibility, operating system flexibility, distribution flexibility, and information system flexibility. A series of goodness-of-fit indices further demonstrates that this scale is internally consistent, reliable, and valid. The various findings suggested in the present study provide a more succinct picture of SCF, and the well-validated scale could be used as a basis for further research and theoretical groundwork in the field of supply chain management.     

HPTLC analysis of ternary mixture containing ketorolac tromethamine,phenylephrine hydrochloride,and chlorpheniramine maleate

Validated and selective high-performance thin-layer chromatography (HPTLC) method was developed for the determination of ketorolac tromethamine (KTC), phenylephrine hydrochloride (PHE), and chlorpheniramine maleate (CPM) in bulk drug and in combined dosage form. The proposed method depends on using HPTLC for separation of the drugs followed by densitometric measurements of their spots at 261?nm. The separation was carried out on Merck HPTLC aluminum sheets of silica gel 60 F254 using chloroform–methanol–ammonia (7.75:2.25:0.1, v/v) as mobile phase. Linear regression lines were obtained over the concentration ranges 0.12–0.50, 0.075–0.27, and 0.09–0.27?µg band^?1 for KTC, PHE, and CPM, respectively, with correlation coefficients higher than 0.999. The method was successfully applied to the analysis of the three drugs in their synthetic mixtures and in their dosage form. The mean percentage recoveries were in the range of 98–102% with percentage relative standard deviation values less than 2%. The method was validated according to ICH guidelines and showed good performances in terms of linearity, precision, accuracy, sensitivity, and stability.     

ITER����������ֳ��ʵ�����ģ��ṹ���

给出了中国ITER氦冷固体增殖剂(HCSB)实验包层模块(TBM)整体结构的初步设计。结构设计方案以低活性铁素体钢(RAFS)为结构材料,稳定性极好的惰性氦气作为冷却剂,陶瓷硅酸锂小球为氚增殖材料。包层结构的设计特点是,采用模块化的设计方案,从而提高了包层的可靠性和安全性。     

Method performance and multi-laboratory assessment of a normal phase high pressure liquid chromatography–fluorescence detection method for the quantitation of flavanols and procyanidins in cocoa and chocolate containing samples

The quantitative parameters and method performance for a normal-phase HPLC separation of flavanols and procyanidins in chocolate and cocoa-containing food products were optimized and assessed. Single laboratory method performance was examined over three months using three separate secondary standards. RSD_(r) ranged from 1.9%, 4.5% to 9.0% for cocoa powder, liquor and chocolate samples containing 74.39, 15.47 and 1.87 mg/g flavanols and procyanidins, respectively. Accuracy was determined by comparison to the NIST Standard Reference Material 2384. Inter-lab assessment indicated that variability was quite low for seven different cocoa-containing samples, with a RSD_(R) of less than 10% for the range of samples analyzed.     

Simple, rapid, and highly sensitive detection of diphosgene and triphosgene by spectrophotometric methods

Methods for the detection and estimation of diphosgene and triphosgene are described. These compounds are widely used phosgene precursors which produce an intensely colored purple pentamethine oxonol dye when reacted with 1,3-dimethylbarbituric acid (DBA) and pyridine (or a pyridine derivative). Two quantitative methods are described, based on either UV absorbance or fluorescence of the oxonol dye. Detection limits are ∼4 μmol/L by UV and <0.4 μmol/L by fluorescence. The third method is a test strip for the simple and rapid detection and semi-quantitative estimation of diphosgene and triphosgene, using a filter paper embedded with dimethylbarbituric acid and poly(4-vinylpyridine). Addition of a test solution to the paper causes a color change from white to light blue at low concentrations and to pink at higher concentrations of triphosgene. The test strip is useful for quick on-site detection of triphosgene and diphosgene in reaction mixtures. The test is easy to perform and provides clear signal readouts indicative of the presence of phosgene precursors. The utility of this method was demonstrated by the qualitative determination of residual triphosgene during the production of poly(bisphenol-A carbonate).