不同表面预处理对有机电致发光显示器性能的影响

从生产角度研究了基板表面的预处理工艺对OLED性能的影响,分别用UVOzone、氧Plasma以及两者相结合的方式对基板进行表面处理,并按照生产工艺制作器件,从接触角、方阻以及光电特性等测试结果对各种表面处理的样品进行比较。结果表明以上处理都改善了器件性能,不同程度提高了器件的清洁度、亮度和发光效率,其中UVOzone和氧Plasma结合的方式处理效果最为显著,器件在10V时亮度达到79920cd/m2,比其他两种处理方式亮度提高约25%。     

新型硅蜡乳液的制备

将蜂蜡用复合乳化剂乳化时加入自制的乳化助剂，制得稳定的蜡乳液，将该乳液与羟基蛙油乳液复配，制得乳白色略带蓝光硅蜡乳液，该硅蜡乳液用于绵羊服装革作顶层手感改善剂，除了获得油润的蜡感和滑爽感之外，还使成革具有抗菌和抗静电作用。     

Dielectric and piezoelectric properties of Pb(Ni1/3Nb2/3)O3–PbTiO3–PbZrO3 ceramics modified with bismuth and zinc substitutions

The dielectric and piezoelectric properties of the (Pb_0.985Bi_0.01)(Ni_1/4Zn_1/12Nb_2/3)_x- (Zr_σTi_1-σ)_1-xO₃ piezoelectric ceramic system (0.2 ≤ x ≤ 0.7, 0.1 ≤ σ ≤ 0.9) were systematically investigated. The results showed that, after poling, the dielectric constant, ε ₃₃ ^T , increased for the tetragonal compositions but decreased for the rhombohedral compositions. Furthermore, high values of ε ₃₃ ^T and piezoelectric modulus, d ₃₁ were found for the compositions along the extension of the morphotropic phase boundary. The highest values of the planar electromechanical coupling factor, K _p, and the piezoelectric modulus, d ₃₁, were found to be 0.70 and − 274 × 10^-12 C N^-1, respectively. The Curie temperature, remanent polarization, coercive field and the lattice constants of the a and c axes in relation to the Pb(Ni_1/3Nb_2/3)O₃ content and the Zr/Zr + Ti ratio were also determined. This revised version was published online in November 2006 with corrections to the Cover Date.     

AUTO CAD图形数据库剖析

本文对ＡＵＴＯ ＣＡＤ图形数据库进行了剖析，分析了系统的图形数据结构，阐述了图形数据库的查询，修改及其应用，以便进一步研究和开发ＡＵＴＯ ＣＡＤ图形系统。     

秦山核电厂安全壳对主蒸汽管道破裂事故的响应

一、概述核电厂安全壳是防止事故后放射性物质大量释放到坏境的最后一道屏障,是保护公众免受超剂量放射性照射的关键设施。人们对安全壳的重要性虽已认识有年,但得到明显事实验证的却是近年发生的美国三哩岛事故和苏联切尔诺贝利灾害性核事故。由表1可知,安全壳的有无对公众的影响是截然不同的。     

原始组织及加热方式对Al-5.8wt%Cu合金熔化行为的影响

利用DSC分析手段，研究了具有3种不同凝固组织的Al-5.8wt%合金在7种不同加热方式下的熔化开始温度和熔化热，发现凝固组织中存在的非平衡共晶在加热过程中大部分扩散溶解，溶入基体，剩余部分参与共晶熔化，其熔化开始温度与组织状态无关，随加热速度的增大略有升高，溶解部分的体积分散与组织状态和加热方式有关，随加热时间和非平衡相表面积的增大而增大。     

飞秒激光脉冲推进小球的实验研究

利用飞秒激光脉冲分别在水平和竖直方向上进行了推进微型小球的实验.实验中首次利用毫焦量级的飞秒激光脉冲(重复频率1 kHz)推进质量在毫克量级的小球,将直径0.7 mm的铁球水平推进了65 mm,直径接近1 mm的聚苯乙烯小球竖直推进了72 mm.实验研究发现:无论是在水平还是在竖直方向上的推进,小球离开飞秒激光聚焦区域之前与小球发生作用的脉冲个数是决定推进效果的决定性因素.通过增大脉宽、换用较长焦距的聚焦透镜增加与小球作用的脉冲个数,可以将小球推进到更远的距离或更高的高度.     

太钢3号卷取机TDC控制系统开发与应用

太钢热连轧厂3号卷取机改造前所采用的美国西屋公司WDPF控制系统已不能满足目前生产和质量的要求，进而应用西门子公司的TDC控制系统对其进行了改造。该项目的设计、编程、调试由太钢自行完成，改造中采用了带钢头部张力优化控制、夹送辊张力控制、卷取机平滑曲线减张控制、卸卷小车横移极限升降极限模拟控制等多项新技术。其改造后产品产量、综合成卷率和卷形良好率均明显提高。     

Transit smart card data mining for passenger origin information extraction

The automated fare collection(AFC) system,also known as the transit smart card(SC) system,has gained more and more popularity among transit agencies worldwide.Compared with the conventional manual fare collection system,an AFC system has its inherent advantages in low labor cost and high efficiency for fare collection and transaction data archival.Although it is possible to collect highly valuable data from transit SC transactions,substantial efforts and methodologies are needed for extracting such data because most AFC systems are not initially designed for data collection.This is true especially for the Beijing AFC system,where a passenger’s boarding stop(origin) on a flat-rate bus is not recorded on the check-in scan.To extract passengers’ origin data from recorded SC transaction information,a Markov chain based Bayesian decision tree algorithm is developed in this study.Using the time invariance property of the Markov chain,the algorithm is further optimized and simplified to have a linear computational complexity.This algorithm is verified with transit vehicles equipped with global positioning system(GPS) data loggers.Our verification results demonstrated that the proposed algorithm is effective in extracting transit passengers’ origin information from SC transactions with a relatively high accuracy.Such transit origin data are highly valuable for transit system planning and route optimization.     

基于单片机的分段线性插值算法实现

分段线性插值算法是一种技术比较成熟、实现比较简单的低次多项式插值算法,其曲线逼近程度即插值函数与原函数误差基本满足一般的工业控制场合需要。该算法占用系统资源少,在数据采集和数据处理等工业控制领域,往往使用单片机或嵌入式系统等资源受限处理器,通过分段线性插值算法简化原函数,减少计算量,对于提高系统整体性能具有显著的现实意义。