Finite Element Method Analysis of the Cutoff Wavelength of Dominant Mode in Unilateral Finline

The cutoff wavelength of dominant mode in unilateral finline is analyzed by finite element method. The cutoff wavelength can be changed by adjusting the thickness of metallic fins and dielectric constant of dielectric substrate. Numerical results provide in this paper have important values in practical applications.     

A 3D multilevel model of damage and strength of wood: Analysis of microstructural effects

A 3D hierarchical computational model of damage and strength of wood is developed. The model takes into account the four scale microstructures of wood, including the microfibril reinforced structure at nanoscale, multilayered cell walls at microscale, hexagon-shape-tube cellular structure at mesoscale and annual rings at the macroscale. With the use of the developed hierarchical model, the influence of the microstructure, including microfibril angle (MFA), the cell shape and the wood density (annual ring structure), differences between earlywood and latewood as well as microstructural arrangements and cellulose strength distributions on the tensile strength of wood is studied numerically. Good agreement of the theoretical results with experimental data has been obtained.     

铝基印制板的成型及压板翘工艺

简述铝基板冲板模具的设计、调试的要点及发生问题的解决方案,重点叙述了通过利用压板翘模具得以成功解决铝基板冲板后板翘的问题。     

中海壳牌公司在检修工作中的HSE管理

介绍壳牌公司在HSE管理上所做的工作、管理水平、对承包商的要求及认识到清洗公司今后在清洗施工及HSE管理上要努力的方向。     

Si3N4-TiN纳米复相陶瓷的制备与性能研究

采用热压烧结方法制备了Si3N4-TiN纳米复相陶瓷,研究了纳米TiN颗粒的添加对Si3N4陶瓷组织、力学性能和抗热震性能的影响.研究结果表明:Si3N4-TiN纳米复相陶瓷的显微组织由粒径为100 nm左右的晶粒构成,TiN以独立颗粒的形式存在;纳米TiN颗粒的添加可以提高纳米Si3N4陶瓷的断裂韧性和抗弯强度,但对硬度影响不大;适量TiN颗粒的添加能改善纳米Si3N4陶瓷的抗热震性.     

澳大利亚、新加坡交通行业职业资格建设及启示

介绍澳大利亚和新加坡在交通行业从业人员培训和考试的现状,以及相关职业资格制度的建设,对上海如何加快推进交通行业职业资格工作带来的启示。     

AgOx型超分辨近场结构的非线性光学特性研究

采用共焦Z扫描系统，以λ=532nm．脉冲宽度0．7ns．重复频率15．79kHz的脉冲半导体激光器作为入射光源，研究了AgOx超分辨近场结构(SuperRENS)薄膜样品的非线性光学性质．实验获得了其三阶非线性折射率系数随入射光功率的变化曲线．并与Au，Ag薄膜作了比较．讨论了光致非线性变化过程。结果表明，在聚焦激光作用下．AgOx超分辨近场结构薄膜样品存在一相变点．即解析出纳米Ag颗粒，满足了产生局域表面等离子体的激发和增强效应的条件。     

Highly Efficient Three Primary Color Organic Single‐Crystal Light‐Emitting Devices with Balanced Carrier Injection and Transport

Organic single crystals have a great potential in the field of organic optoelectronics because of their advantages of high carrier mobility and high thermal stability. However, the application of the organic single crystals in light‐emitting devices (OLEDs) has been limited by single‐layered structure with unbalanced carrier injection and transport. Here, fabrication of a multilayered‐structure crystal‐based OLED constitutes a major step toward balanced carrier injection and transport by introducing an anodic buffer layer and electron transport layer into the device structure. Three primary color single‐crystal‐based OLEDs based on the multilayered structure and molecular doping exhibit a maximum luminance and current efficiency of 820 cd cm^?2 and 0.9 cd A^?1, respectively, which are the highest performance to date for organic single‐crystal‐based OLEDs. This work paves the way toward high‐performance organic optoelectronic devices based on the organic single crystals.     

Recent Advances in Optical Engineering of Light‐Emitting Electrochemical Cells

Since the first demonstration of light‐emitting electrochemical cells (LECs) in 1995, much effort has been made to develop this technology for display and lighting. A common LEC generally contains a single emissive layer blended with a salt, which provides mobile ions under a bias. Ions accumulated at electrodes facilitate electrochemical doping such that operation voltage is low even when employing high‐work‐function inert electrodes. The superior properties of simple device architecture, low‐voltage operation, and compatibility with inert metal electrode render LECs suitable for cost‐effective light‐emitting sources. In addition to enormous progress in developing novel emissive materials for LECs, optical engineering has been shown to improve device performance of LECs in an alternative way. Light outcoupling enhancement technologies recycle the trapped light and increase the light output from LECs. Techniques to estimate emission zone position provide a powerful tool to study carrier balance of LECs and to optimize device performance. Spectral tailoring of the output emission from LECs based on microcavity effect and localized surface plasmon resonance of metal nanoparticles improves the intrinsic emission properties of emissive materials by optical means. These reported optical techniques are overviewed in this review.     

SSL协议及其应用

SSL协议是在TCP/IP的IP套接层的安全协议,以补充TCP/IP协议安全的不足。SSL协议在网上银行、电子商务中得到广泛地应用,主要解决了数据的安全性、保密性。但其并不能证明交易的不可否认性,为此,文章在SSL原来的安全基础上,开发了安全控件或安全代理软件,以提高SSL协议的安全性。