氧气在浮法玻璃生产中的应用

介绍了国内某玻璃厂浮法玻璃熔窑使用氧气助燃的一次尝试,简介了其中底烧法的使用方法、过程和效果,列举了有待改进的内容。     

UV-vis and photoluminescent spectra of TiO<Subscript>2</Subscript> films

TiO₂ fims have been deposited on glass substrates using DC reactive magnetron sputtering at different oxygen partial pressures from 0. 10 Pa.to 0.65 Pa. The transmittance (UV-vis) and photoluminescence (PL) spectra of the films were recorded. The results of the UV-vis spectra show that the deposition rate of the films decreased at oxygen partial pressure P(O₂)≥0.15 Pa, the band gap increased from 3.48 eV to 3.68eV for direct transition and from 3.27 eV to 3.34 eV for indirect transition with increasing the oxygen partial pressure. The PL spectra show convincingly that the transition for films was indirect, and there were some oxygen defect energy levels at the band gap of the films. With increasing the O₂ partial pressure, the defect energy levels decreased. For the films sputtered at 0.35 and 0.65 Pa there were two defect energy levels at 2.63 eV and 2.41 eV, corresponding to 0.72 eV and 0.94 eV below the conduction band for a band gap of 3.35 eV, respectively. For the films sputtered at 0.10 Pa and 0.15 Pa, there was an energy band formed between 3.12 eV and 2.06 eV, corresponding to 0.23 eV and 1.29 eV below the conduction band. ZHAO Qing-nan : Born in 1963 Funded by Natural Science Foundation of Hubei Province, China.     

The Conditional Probability Density Function for a Reflected Brownian Motion

Models in economics and other fields often require a restricted Brownian motion because frequently implicit or explicit barriers restrict the domain. This paper contributes to the literature on reflected Brownian motion by deriving its conditional density function as a closed-form expression that consists of infinite sums of Gaussian densities. This solution is compared with an alternative, trigonometric expression derived earlier. Numerical analyses reveal that convergence properties of the expression derived in this paper are superior to those of the alternative representation for most practically relevant set-ups. Despite the complex appearance of the density formula, its use only requires fractions of a second on simple desktop computers such that, next to the theoretical appeal, also practicability is guaranteed.     

落锤试验测定船板的无塑性转变温度

无塑性转变温度是安全设计的重要参量，广泛应用于材料研究和产品质量控制过程。利用落锤试验方法，测定了AH36级船板的无塑性转变温度为-25℃，并对试验结果进行了评定。结果表明，落锤试验方法简单，试验数据重复性好，当船板的服役温度高于NDTT时，基本保证船板不会发生脆断。     

外包过渡中的管理控制问题探讨

外包过渡是介于外包关系建立与实施之间的一个关键环节,顺利的外包过渡对外包项目持续、有效的后续管理关系重大.着重对外包过渡中的衔接问题、整合机制、管理架构、管理者安排,以及应遵守的程序进行了探讨,这对成功的外包实践有着现实的指导意义.     

论流媒体平台构架中的几个关键问题

本文首先讨论了在Linux平台上建立一个低价高效的流媒体应用平台，进而分析了流媒体系统构架中流服务器平台、软硬件兼容、web接口技术和编码技术等几个关键问题，并提出了相应的技术解决方案，为流媒体的广泛应用打下了基础。     

Phase transition in L-alaninium oxalate by photoacoustics

Phase transition in L-alaninium oxalate is studied by using TG, DTA and photoacoustic spectroscopy. A sharp transition at 378 K by photoacoustics is observed whereas at the same temperature the endothermic energy change observed by TG and DTA is not very sharp. This is discussed in detail with reference to the other known data for the organic crystals.     

改进蚁群优化算法在配电网网架规划中的应用

从转移概率和信息素的动态更新机制两方面对传统蚁群算法进行了改进。转移概率设计中采用2个参数的联动控制,实现了Dorigo和Maniezzo的设想。信息素动态更新机制使信息素权重随迭代次数增加而改变,实现了对整个可行域的搜索全面而迅速,弥补了传统蚁群算法训练效率低下和易陷入局部极小的不足。配电网优化的结果表明该算法的有效性。     

多边形的分类及判别方法

基于多边形边方向的唯一性,提出了一种允许边重叠、交叉的平面多边形的分类方法,即平面任意多边形分为单纯多边形和奇异多边形两种,拓展了平面多边形的研究领域.在此基础上通过引入多边形点的矢性数的概念,给出了一种单纯多边形的判断方法,为实现笔画字体的轮廓化提供了新的解决途径.