热像法研究基底材料与薄膜的发射率变化关系

介绍了镀膜技术和红外热像仪测量镀膜材料发射率的方法,并利用红外热像法分析了基底材料对薄膜发射率的影响。通过实验研究了镀膜时间与膜厚度变化导致的测量波段发射率的变化关系。     

Auto-correlation Properties of Scattering Light in Ultrasound-modulated Random Media

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｅｘｔｒａｃｔｉｎｇｕｓｅｆｕｌｉｎｆｏｒｍａｔｉｏｎａｂｏｕｔｔｈｅｄｙｎａｍｉｃａｌｓｃａｔｔｅｒｅｒｓｆｒｏｍｔｈｅｔｅｍｐｏｒａｌｆｌｕｃｔｕａｔｉｏｎｓｏｆｓｃａｔｔｅｒｉｎｇｌｉｇｈｔｆｉｅｌｄｈａｓｂｅｅｎｓｔｕｄｉｅｄｆｏｒｍａｎｙｙｅａｒｓ.Ｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｄｉｆｆｕｓｉｎｇ ｗａｖｅｓｐｅｃｔｒｏｓｃｏｐｙ[1～ 3 ] (ＤＷＳ)ｈａｓｅｘｔｅｎｄｅｄｔｈｅｔｒａｄｉｔｉｏｎａｌａｐｐｌｉｃａｔｉｏｎｓｉｎｓｉｎｇｌｅ ｓｃａｔｔｅｒｉｎ…     

8-3线优先编码器74LS148的级联分析及研究

74LS148是一种带扩展功能的8-3线优先编码器,将多片74LS148集成8-3线优先编码器级联构成不同的编码器,能够灵活、有效地扩大编码器的使用范围。不同的74LS148进行级联时,任何时候只对其中优先级别最高的输入信号进行编码,编码器的工作状态由使能输入端决定。     

基于编码器的复摆设计与实验研究

针对复摆实验,设计了一种基于编码器的复摆实验装置。该装置将摆锤和多孔摆结合起来,可以采用多种方式对重力加速度、转动惯量进行求解,并验证了刚体的平行轴定理。在实验过程中,采用Matlab进行最小二乘法线性拟合,创新性地完成了对重力加速度的求解和平行轴定理的验证。实验结果表明,相比于传统的复摆,该装置更为简便,精度更高。     

利用GPIB和VC构建光器件自动测试系统

通过GPIB接口,使用VC进行编程,设计了快速测量光通半导体放大器(SOA)各项性能参数的自动测试系统.该系统使得一台计算机同时控制多台光器件测试仪器,并产生详尽的数据报表.该系统提高了工作效率,降低了生产成本,并具有良好的可扩展性.     

Towards the automatic analysis of 1H NMR spectra: Part 4--additional requirements of flow-NMR

Flow-NMR allows more rapid and convenient acquisition of NMR spectra. Its main application area has therefore been in multiple parallel synthesis or combinatorial chemistry. At the same time, there is a significant need to automate the analysis of the resultant spectra. However, flow-NMR brings spectral imperfections, which compromise attempts to automate this analysis. This study proposes experimental and computational expedients to accommodate the effects of residual solvent peaks, 13C satellites, finite signal-to-noise ratio, impurities, presaturation on integral calculations, the 'silent' region and how multiplet areas can be scaled to numbers of protons in this environment.     

A computational model of a bonus-malus system with a variable trend

The paper considers a model of a bonus-malus system with a variable trend in the case of a three-parameter gamma distribution. The parameters of the distribution and the value of the trend are selected based on statistical data. The indexes of the bonus-malus system are obtained.     

The Indian auto component industry – Estimation of operational efficiency and its determinants using DEA

In this paper, the performance analysis of the Indian auto component industry is carried out from the perspectives of an original equipment manufacturer and a component supplier. Various efficiency measures are estimated using Data Envelopment Analysis with publicly available financial data on a representative sample of 50 firms. The first stage analysis reveals various operational inefficiencies in the auto component industry which are subsequently decomposed into technical, input mix and scale efficiencies. The study finds evidence that a majority of the inefficient firms are operating in the diminishing returns to scale region and demonstrates potential savings through benchmark input targets. A second stage analysis aimed at exploring root causes of inefficiencies finds that substitution of labour for capital could be causing a variety of inefficiencies including the input mix inefficiency in the Indian component industry. The empirical results also suggest that, unlike the global auto supply chain, higher average inventories are required for higher operational efficiencies in the Indian context. Contrary to the popular expectations, the technology licensing does not show significant influence on efficiency, at least in the short term, whereas efficient working capital management does result in higher operational efficiencies. The study also unearths the need to reform labour laws which are significantly contributing to various inefficiencies in the Indian component industry.