交流粉末电致发光板

交流粉末电致发光板是电致发光器件的一种。它是一种在玻璃基板上敷有透明电极、发光层、介质层、背电极及平板玻璃的多层结构。透明电极与背电极之间接通交流电压,发光层就会发出无红外线辐射的冷光。发光的颜色视基质材料和激活剂的不同,有绿、蓝、黄等不同颜色。目前北京师范学院制备的发光板在220V电压下,亮度     

有机电致发光薄膜器件的研究

有机电致发光薄膜具有制备方便,驱动电压低,发光亮度高,可以和合物基底匹配等优点,成为目前世界显示技术的一大研究热点。论述了有机发光薄膜器件的结构、工作机理及其膜电致发光薄膜电致,光致发光的特性,论述了薄膜发光器件的电学科技司与光学特性及其器件在脉冲电压波形驱动下的电光特性,提出了应用于显示技术的有机电致光薄膜器件的电不于光学特性的优化方法。     

利用磷光材料提高有机薄膜电致发光效率的研究进展

激活有机分子三重态可提高有机电致发光薄膜器件的发光效率。概述了有机电致磷光薄膜器件的结构、材料、提高器件电致发光效率的原理,目前的研究状况、存在的问题和研究的发展趋势。     

有机电致发光薄膜器件的研究

有机电致发光薄膜具有制备方便,驱动电压低,发光亮度高,可以与聚合物基底匹配等优点,成为目前世界显示技术的一大研究热点。论述了有机发光薄膜器件的结构、工作机理及其薄膜电致,光致发光的特性,论述了薄膜发光器件的电学特性与光学特性及其器件在脉冲电压波形驱动下的电光特性,提出了应用于显示技术的有机电致发光薄膜器件的电学于光学特性的优化方法。     

电致发射蓝光和蓝绿光的有机薄膜的研究进展

概述了电致发射蓝光和蓝绿光的电致发光薄膜器件的结构、材料、发光机理、目前研究的状况、出现的问题以及研究的发展趋势。     

华晶丰场致发光(EL)板为钟表添色增辉

一种区别于发光二极管、荧光照明材料,无放射性污染、对使用环境无特殊要求的照明器件——场致发光薄膜(EL),被广泛使用于钟表产品、手机、传呼机和各种夜间公用指示牌等场合。 场致发光板,也称作电击冷光板,是根据平板电容原理及发光材料组成的光电显示器件,可根据用户的不同要求,呈绿、蓝、红等不同色调,用于钟表的表盘,不但可以解决夜间照明问题,还可增加表盘的美观性。     

SLD1型半导体激光光源

论述了我所研制的ＳＬＤ１型半导体激光光源的基本构造，电源，冷却装置及安装方法，针对半导体激光发射功率随温度变化的特性，论述了息样利用温控装置使其温度被控制在一定范围内，然后利用光功率自动控制电路，使其发光功率保持稳定。     

红色场致发光材料

日本三井化学公司研制成功可发纯红光的有机场致发光材料 ,在此基础上可望制造出场致发光全彩色显示装置。场致发光是在固体材料上施加电场导致发光的现象。与液晶相比 ,场致发光材料的反应速度快 ,适合于显示动态画面。并且 ,它会自己发光 ,不像液晶那样需要背照光 ,因而消耗电力少。它适宜于制造便携式信息处理终端的显示器 ,有着广泛的用途。但在此之前 ,在红、蓝、绿三原色光中 ,红色有机场致发光材料尚未开发成功 ,这使得用场致发光材料制造的显示器无法实现全彩显示。这种纯红色有机场致发光材料 ,是由电极、空孔注入运输层、发光层和…     

显示技术与光电子薄膜

简单阐述了显示技术与光电子薄膜的关系及其重要性，介绍了三种显示技术，即液晶显示，场致发光的电致变色的研究现状及发展趋势。     

关于有机薄膜电致发光机理的定性分析

观测了有机电致发光薄膜器件的电流变化和相对应的发光变化特性 ,并作了定性分析 ,提出了类 PN结正向导通发光的有机薄膜电致发光机理的模型     

缺陷太阳电池EL图像及伏安特性分析

本文基于电致发光（Electroluminescence,EL）的理论,利用红外检测的方法,通过CCD近红外相机实验检测出了晶体硅太阳电池中存在的隐性缺陷,如隐裂、断栅、电阻不均匀、花片等,并将可见光下电池图像与EL图像进行对比。对存在缺陷的太阳电池进行了伏安特性测试,得出隐裂缺陷对太阳电池伏安特性、填充因子、效率等性能的影响,也证明电致发光技术检测太阳电池缺陷的准确性。     

Dynamic response with mass variation of laminated composite twisted plates

In this study, the dynamic response of free vibration of laminated composite twisted (skewed) plate with mass variation via cutout and additional mass is investigated. The mathematical model employs cubic variation of the thickness coordinates in the displacement field. The mathematical formulation also includes the effects of transverse shear and rotatory inertia. A realistic parabolic distribution of transverse shear strains through the plate thickness is assumed and the use of the shear correction factor is avoided. A C⁰ finite element formulation of the mathematical model is developed to analyze the dynamic behavior of laminated composite twisted plate with cutout and additional mass. Given that no results on the present problem of free vibration of laminated composite twisted plate with cutout and additional mass are available in literature, novel results for different twist angles of laminated composite plates along with mode shapes are presented by varying the geometry, boundary conditions, and ply orientations.     

约束层阻尼板的有限元建模研究

粘弹性材料（VEM）的本构关系随频率和温度的变化而变化，对粘弹结构难以进行动特性分析及控制研究。基于Hamilton原理，给出了一种建立约束层阻尼（CLD）板动力学方程的新建模方法，建模时，考虑到VEM的纵向位移影响，并引入虚拟自由度，导出了标准二阶定常线性系统模型，从而避免因粘弹性材料导致的高阶非线性方程。采用GHM方法描述VEM的本构关系，它能直接与有限元法融合。算例分析了夹芯层为ZN—1型粘弹性材料的CLD悬臂板的动态特性，并与相关文献中的计算及试验结果进行比较，计算结果更加准确，表明新建模方法是准确的。     

Application of the "imaging plate" to TEM image recording

The "imaging plate" is a highly sensitive image recording plate for X-ray radiography, which is coated with photo-stimulable phosphor. The imaging plate is exposed to electrons in a transmission electron microscope. Its fundamental properties (sensitivity, dynamic range and sharpness) have been estimated in detail. Also, the image quality of the imaging plate for some specimens in a transmission electron microscope has been estimated. As a result, it has been ascertained that the imaging plate has superior properties and high practicability as an image recording material in a transmission electron microscope.     

Closed-form vibration analysis of thick annular functionally graded plates with integrated piezoelectric layers

This paper employs an analytical method to analyze vibration of piezoelectric coupled thick annular functionally graded plates (FGPs) subjected to different combinations of soft simply supported, hard simply supported and clamped boundary conditions at the inner and outer edges of the annular plate on the basis of the Reddy's third-order shear deformation theory (TSDT). The properties of host plate are graded in the thickness direction according to a volume fraction power-law distribution. The distribution of electric potential along the thickness direction in the piezoelectric layer is assumed as a sinusoidal function so that the Maxwell static electricity equation is approximately satisfied. The differential equations of motion are solved analytically for various boundary conditions of the plate. In this study closed-form expressions for characteristic equations, displacement components of the plate and electric potential are derived for the first time in the literature. The present analysis is validated by comparing results with those in the literature and then natural frequencies of the piezoelectric coupled annular FG plate are presented in tabular and graphical forms for different thickness-radius ratios, inner-outer radius ratios, thickness of piezoelectric, material of piezoelectric, power index and boundary conditions.     

易燃易爆环境下安全切割装置的研制

针对在易燃易爆环境下切割容易出现爆炸事故的问题，研制出了一种安全切割装置。分析了瓦斯爆炸条件，阐述了用磨料水射流进行安全切割装置的工作原理。大量实验表明了该切割装置在瓦斯气体环境下不会发生爆炸现象。该装置在易燃易爆场所有很好的应用前景。     

Improved 3-omega measurement of thermal conductivity in liquid, gases, and powders using a metal-coated optical fiber

A novel 3ω thermal conductivity measurement technique called metal-coated 3ω is introduced for use with liquids, gases, powders, and aerogels. This technique employs a micron-scale metal-coated glass fiber as a heater/thermometer that is suspended within the sample. Metal-coated 3ω exceeds alternate 3ω based fluid sensing techniques in a number of key metrics enabling rapid measurements of small samples of materials with very low thermal effusivity (gases), using smaller temperature oscillations with lower parasitic conduction losses. Its advantages relative to existing fluid measurement techniques, including transient hot-wire, steady-state methods, and solid-wire 3ω are discussed. A generalized n-layer concentric cylindrical periodic heating solution that accounts for thermal boundary resistance is presented. Improved sensitivity to boundary conductance is recognized through this model. Metal-coated 3ω was successfully validated through a benchmark study of gases and liquids spanning two-orders of magnitude in thermal conductivity.     

装载机动臂的应力分析

装载机是工程建设中重要的机器之一,动臂是装载机工作装置的主要承力构件。文中采用Pro/E创建有筋板的动臂三维模型,然后导入ANSYS中,以偏载工况为例,对其进行应力分析。分析结果显示筋板对耳板、横梁处的应力分布有一定的影响,对动臂板的应力分布影响不大,最大应力集中点在动臂与动臂油缸铰接处。     

新型3自由度并联机构的设计与分析

基于机构的概念,将一种正方体折纸盒折痕等效为铰链,连接折痕的纸板等效为连杆,抽象出新型3自由度并联机构.该新型并联机构由定平台、动平台和4个连接支链组成,各支链结构完全相同,且都含有1个具有特殊结构的六杆球面变胞机构闭环子链.介绍此新型并联机构结构设计,其特点是结构完全对称,只含有单自由度转动运动副.详细描述各支链中闭环子链的结构特点、一般构态及其自由度数.应用螺旋理论,分析运动支链中闭环子链的自由度特性.根据广义运动副的概念,用广义运动副替代各支链中的六杆球面变胞机构,并分析各运动支链末端约束.依据该并联机构的结构对称性,分析其动平台的自由度数和相应的自由度特性,得到动平台相对于定平台具有2个转动和1个移动自由度,并具有连续转轴.