Wedding……

兄弟结婚了，朋友结婚了，朋友的朋友结婚了；男的结婚了，女的结婚了，不男不女的也结婚了；有感情的结婚了，没感情的结婚了，认识不认识的结婚已经无所谓了……     

论装配式配电站的建设

装配式配电站的建设与发展,为电力行业的发展带来了全新的力量,极大地供应了整个社会的用电需求,提高了供电系统的运转水平,也为配电站建设节省了空间,削减了施工程序和周期,减少了环境污染,为整个社会创造了良好的经济效益和环境效益。本文分析了装配式配电站建设的方案、优势、技术以及效益。     

对VoWLAN技术的MAC研究与改进

提出了一种适合VoWLAN技术DEDCA接入机制,引入了信道状态CS因子,提出了基于信道状态的动态的退避窗口机制和一种新的退避方式.确立了退避窗户最大值和最小值的与信道关系的公式,确立了退避方式阀值的公式,最后通过进行了仿真,DEDCA不但对视频和音频有QoS保证,整个信道的性能都提高了,验证了DEDCA的正确性和适合在VoWLAN技术中的应用.     

基于公平性的自相似业务接纳控制研究

文中研究了基于分形稳定运动有效带宽的计算方法,利用迭代过程推导出了聚合流有效带宽的计算公式,提出了一种基于有效带宽的公平性的自相似业务接纳控制算法,在接纳判断过程中引入了公平性机制,保证了业务接纳的公平性,通过MATLAB和OPNET相结合的仿真方法证明了该算法的有效性.结果证明了文中提出的算法保障了网络的服务质量,保证了各业务接纳的公平性,同时保持了网络高的利用率.     

基于ZEMAX的红外光学系统设计与优化

阐述了该光学系统研究的意义,确定了基本设计原则。然后进行了平行光管和望远镜的高斯光学结构模型及设计,建立了具体的数学模型并进行求解。最后根据目标耦合光路结构,利用ZEMAX软件对该光学系统进行了优化设计,对优化结果进行了像质评价,得出了结论。该系统解决了红外光学精确制导系统动态跟踪特性的内场测试的一系列问题,促进了红外黑体跟踪目标地面等效测试的发展,对提升仿真试验技术能力提供了重要的硬件支撑。     

基于XSLT和XML改进的Struts框架研究

介绍了Struts的框架模式以及流程,XML和XSLT的特点,分析了目前Struts的框架的优缺点,提出了新的改进方法,给出并分析了改进方法的流程图,还讲解了新方案的核心类的实现。重点讲解了如何用XSLT和XML改进Struts,最后阐述了改进后的优势。     

天线副反射面的数控加工方法

主要研究了非圆曲线的数控加工工作原理,给出了计算步骤和误差分析。分析了天线副反射面的误差分配原则。运用误差补偿方法加工了天线副反射面,并给出了实测误差曲线,与未经修正的误差曲线进行了比较,验证了该方法的正确性。     

二极管泵浦薄片激光器的最新进展

综述了国外不同类型薄片激光器的技术现状,分析了不同结构薄片激光器所具有的技术优势,技术限制和发展潜力,评述了薄片激光器所具有的诱人的应用前景,指出了遏制薄片激光器进一步发展的瓶颈,展望了薄片激光器未来的发展方向.     

基于PLC的电路板尺寸检测机控制系统设计

本文首先介绍了电路板尺寸检测机的组成部分,在此基础上设计了检测机的控制系统,包括硬件和软件设计。对控制系统的硬件进行了选型,设计了电气原理图;分析了检测机的动作流程,给出了程序流程图。通过实验室模拟调试和现场调试,达到了预期的检测要求。     

对我国车联网发展的思考

作为当今汽车工业和无线通信领域新宠,车联网引起了全球广泛关注。本文概述了车联网及其特征,介绍了美国、日本等一些国家车联网应用发展的情况,分析了车联网发展面临的问题,对我国车联网产业发展进行了探讨,并展望了未来车联网时代的生活。     

The AWG/spl par/PSC network:a performance-enhanced single-hop WDM network with heterogeneous protection

Single-hop wavelength-division-multiplexing (WDM) networks based on a central passive star coupler (PSC) or arrayed-waveguide grating (AWG) hub have received a great deal of attention as promising solutions for the quickly increasing traffic in metropolitan and local area networks. These single-hop networks suffer from a single point of failure: if the central hub fails, then all network connectivity is lost. To address this single point of failure in an efficient manner, we propose a novel single-hop WDM network, the AWG/spl par/PSC network. The AWG/spl par/PSC network consists of an AWG in parallel with a PSC. The AWG and PSC provide heterogeneous protection for each other; the AWG/spl par/PSC network remains functional when either the AWG or the PSC fails. If both AWG and PSC are functional, the AWG/spl par/PSC network uniquely combines the respective strengths of the two devices. By means of analysis and verifying simulations we find that the throughput of the AWG/spl par/PSC network is significantly larger than the total throughput obtained by combining the throughput of a stand-alone AWG network with the throughput of a stand-alone PSC network. We also find that the AWG/spl par/PSC network gives over a wide operating range a better throughput-delay performance than a network consisting of either two load sharing PSCs in parallel or two load sharing AWGs in parallel.     

基于SOI的16通道200GHz阵列波导光栅

设计并制作了基于绝缘体上硅(SOI)材料的1×16阵列波导光栅(AWG).该AWG器件的中心波长为1 550 nm,信道间隔为200 GHz,采用了脊型波导结构.首先确定了波导的结构尺寸以保证单模传输,并利用束传播法(BPM)模拟了波导间隔、弯曲半径和锥形波导长度等参数对器件性能的影响,对器件结构进行了优化,同时也利用BPM方法模拟了器件的传输谱.模拟结果显示:器件的最小信道损耗为4.64 dB,串扰小于-30 dB.根据优化的器件结构,通过光刻等半导体工艺制作了AWG,经测试得到AWG器件的损耗为4.52～8.1 dB,串扰为17～20 dB,能够实现良好的波分复用/解复用功能.     

全聚合物型无热化阵列波导光栅参数的优化

研究一种新型无热化阵列波导光栅,这是由聚合物组成的一种新型阵列波导光栅。阵列波导光栅对温度的依赖性受波导物质的折射率、热膨胀系数和波导芯的尺寸影响,所以,通过调节这些参数就可以减小温度对阵列波导光栅的影响。优化得到全聚合物型阵列波导光栅在温度20℃～70℃范围内波谱漂移小于常规型AWG结构的0.5%。     

Crosstalk reduction in arrayed-waveguide grating multiplexer/demultiplexer using cascade connection

This paper proposes a cascade-connected arrayed-waveguide grating (AWG) as a solution to the problem of crosstalk accumulation in a large-scale AWG multiplexer/demultiplexer (MUX/DEMUX) and demonstrates a 64-channel cascaded AWG module with a very low background crosstalk of less than -80 dB and a total crosstalk of about -34 dB. In this paper, the authors densely integrate 64 additional compactly designed crosstalk-suppressing AWGs whose bandwidths were carefully optimized and directly attach them to a conventional 64-channel AWG. Consequently, in addition to a very low crosstalk, a low insertion loss and a compact size without passband shape distortion are achieved with this module. Based on the performance of the cascaded AWG module, it is then estimated that it is possible to realize a 1000-channel AWG MUX/DEMUX that is free from the problem of crosstalk accumulation.     

Multistage WDM access architecture employing cascaded AWGs

Here we propose passive/active arrayed waveguide gratings (AWGs) with enhanced performance for system applications mainly in novel access architectures employing cascaded AWG technology. Two technologies were considered to achieve space wavelength switching in these networks. Firstly, a passive AWG with semiconductor optical amplifiers array, and secondly, an active AWG. Active AWG is an AWG with an array of phase modulators on its arrayed-waveguides section, where a programmable linear phase-profile or a phase hologram is applied across the arrayed-waveguide section. This results in a wavelength shift at the output section of the AWG. These architectures can address up to 6912 customers employing only 24 wavelengths, coarsely separated by 1.6 nm. Simulation results obtained here demonstrate that cascaded AWGs access architectures have a great potential in future local area networks. Furthermore, they indicate for the first time that active AWGs architectures are more efficient in routing signals to the destination optical network units than passive AWG architectures.     

阵列波导光栅复用／N复用器的耦合封装技术研究

从理论上分析了光纤和波导端面之间的耦合长度与光纤 波导 横截面尺寸之间的关系 提出了一种新的 （ ） ， 耦合封装方案 该方案克服了芯片和光纤阵列Ａ Ｗ Ｇ 。 Ａ Ｗ Ｇ对准时间过长的问题 并解决了封装好的模块作为双 ， Ａ Ｗ Ｇ向器件使用时可能出现插入损耗过大的问题 。     

Design and Analysis of 4×4 Arrayed Waveguide Grating Multiplexer

The operation principle of an arrayed waveguide grating(AWG) multiplexer is introduced and the 4×4 AWG with following design parameters is discussed in detail, such as the choice of wavelength, the neighboring arrayed waveguide distance ΔL, the channel frequency interval Δf, and the free spectral range. The structure of 4×4 AWG is designed and the result of stimulated test is also given. Analysis shows that the 4×4 AWG is characterized by a wide dynamic range, low crosstalk, better spectrum properties, and a compact structure.     

阵列波导光栅复用器优化设计的数值计算

阵列波导光栅(AWG)复用／解复用器的优化设计计算是集成光波导器件设计计算中的难点．文章应用AWG光信号传输特性和光栅方程，提出了AWG组成部分输入／输出波导、阵列波导、平板波导相关参数及阵列波导结构优化设计的数值计算方法，给出了具体的计算数值；该计算方法解决了AWG复用器优化设计计算的问题，为进一步建立AWG的计算机辅助设计提供了基础．     

阵列波导光栅插入损耗的降低

阵列波导光栅（AWG Arrayed Waveguide Grating）是实现多通道密集波分复用（DWDM Dense Wavelength Division Multiplexing)光网络的理想器件,插入损耗是它的一个重要性能指标。本文介绍了多种减小AWG插入损耗的方法,并在此基础上,分析了如何使用楔形波导结构来降低模式失配所导致的耦合损耗。这种方法可以在不增加器件制作难度的同时大大降低AWG的插入损耗,并且适用于各种材料和结构的AWG器件设计。     

氟化聚合物光谱响应平坦化阵列波导光栅的优化设计和制备

本文基于阵列波导光栅(AWG)的传输理论,利用含氟聚合物(PFS-co-GMA)共聚物材料,对17×17信道光谱响应平坦化AWG波分复用器进行了参数优化.由于在聚合物阵列波导光栅器件的制备过程中,选用了反应离子刻蚀(RIE)工艺和蒸汽回溶技术,形成的梯形截面波导芯,使AWG传输的光产生相位移,导致传输光谱移动,引起串扰...