实验教学中网络预约系统的设计与开发

实验预约是开放性实验教学过程中不可缺少的组成部分,现有的预约机制存在很大的问题。结合电工电子实验教学中心的现状,设计与开发了实验教学中的网络预约系统,对实验教学起到很大的辅助作用。该系统已经投入实际运用,反映良好。     

数据专业设计标准化若干问题的思考与实践

以数据专业设计标准化为案例,对设计流程、设计模板及加速知识共享等进行了分析,提出了“聚焦设计标准化,提升设计服务水平”的理念,并探讨了在设计服务商内部推广的可行性。     

基于PON的全业务网络规划与建设

本文对全业务网络中的OLT、ODU、ONU规划与部署进行详细的分析与研究,并提出了合理的规划方案。     

基于SOA架构的位置服务平台模型研究

在明确界定位置服务平台含义的基础上,分析了我国电信运营商位置服务平台建设中存在的问题,提出了基于SOA架构构建位置服务平台模型的思路,并运用ESB集成框架及Web Service技术进行设计和实现,以期为位置服务业务的推广起到促进作用。     

Surface Oxygen Coordination of Hydrogen Bond Chemistry for Aqueous Ammonium Ion Hybrid Supercapacitor

Aqueous ammonium ion hybrid supercapacitor (A-HSC) combines the charge storage mechanisms of surface adsorption and bulk intercalation, making it a low-cost, safe, and sustainable energy storage candidate. However, its development is hindered by the low capacity and unclear charge storage fundamentals. Here, the strategy of phosphate ion-assisted surface functionalization is used to increase the ammonium ion storage capacity of an α-MoO₃ electrode. Moreover, the understanding of charge storage mechanisms via structural characterization, electrochemical analysis, and theoretical calculation is advanced. It is shown that NH₄⁺ intercalation into layered α-MoO₃ is not dominant in the A-HSC system; rather, the charge storage mainly depends on the adsorption energy of surface “O” to NH₄⁺. It is further revealed that the hydrogen bond chemistry of the coordination between “O” of surface phosphate ion and NH₄⁺ is the reason for the capacity increase of MoO₃. This study not only advances the basic understanding of rechargeable aqueous A-HSC but also demonstrates the promising future of surface engineering strategies for energy storage devices.     

一种新的双偶氮化合物的三阶非线性光学性能

合成了一种新的双偶氮化合物2,6-双[(2,4-二羟基苯基)偶氮]蒽醌,用IR,1 H NMR和元素分析表征了其结构.采用飞秒激光,运用简并四波混频法,研究了化合物在非共振状态下的三阶非线性光学性能.它的三阶非线性光学极化率χ(3)为3.37×10-13 esu,非线性折射率n2为6.21×10-12 esu,分子二阶超极化率γ为4.02×10-31 esu,响应时间τ为101 fs.分析了化合物的分子结构对三阶非线性光学性能的影响.增长共轭链,形成供吸供构型,增大取代基的吸或供电子能力等因素有利于获得较大的三阶非线性光学性能.     

一种基于H.264的编码优化方案在医疗视觉训练系统中的应用研究

斜弱视训练的手段随着感知觉学习理论的发展,采用多媒体训练的方法日趋丰富。通过利用H．264编码技术构建基于网络的远程视觉训练系统,方便医患双方信息交互,提高实时性。训练中心采用TI的TI532DM642实现实时压缩编码,然后通过高性能服务器和远程终端交互,传输训练码流到终端并解码显示用于训练。并通过对图像序列的参数提取优化算法,获取特征参数,简化模式选择过程,提高系统性能。     

脉冲激光沉积制备TiN/AlN多层薄膜及其工艺研究

本文采用脉冲激光沉积（PLD）法,在单晶硅试样表面上沉积制备了TiN/AlN多层硬质薄膜;研究了激光能量、靶衬距离和基体温度等工艺参数对薄膜性能的影响。采用X射线衍射（XRD）、扫描电子显微镜（SEM）和显微硬度仪方法研究了薄膜的性能。结果表明：薄膜由TiN和立方AlN细晶和无定型的非晶TiN、AlN组成,薄膜的调制周期尺寸均在λ=（50-200）nm范围内,多层结构界面清晰;当多层薄膜调制周期在100nm以下时,薄膜的显微硬度明显高于TiN和AlN的混合硬度值。     

FTTx系统ONU设置问题的探讨

简要地介绍了FTTx系统的基本组成、场景模型分类及ONU类型,详细地阐述了商务楼宇、工业园区、学校／医院、酒店、市场、别墅群及住宅小区等用户类型的接入模式及ONU的设置问题。     

Simulation of Nano Si and Al Wires Growth on Si(1O0) Surface

Growth of nano Si and Al wires on the Si(100) surfaces is investigated by computer simulation, including the anisotropic diffusion and the anisotropic sticking. The diffusion rates along and across the substrate dimer rows are different, so are the sticking probabilities of an adatom, at the end sites of existing islands or the side sites. Both one-dimensional wires of Si and Al are perpendicular to the dimer rows of the substrate, though the diffusion of Si adatoms is contrary to that of Al adatoms, i.e. Si adatoms diffuse faster along the dimer rows while Al adatoms faster across the dimer rows. The simulation results also show that the shape anisotropy of islands is due to the sticking anisotropy rather than the diffusion anisotropy,which is in agreement with the experiments.