浅谈电力通信网络管理系统结构

分析了电力系统专用通信网的管理要求，针对网络管理层次多、设备种类多、网络结构复杂的特点，从技术的角度提出了建设电力通信网网络管理系统的基本要求及解决方案。方案以TMN为基础兼容其他网管系统标准，强调接口的开放性，强调系统的一体化和独立性，强调网络化和对各种体系结构的兼容性。为网管系统设计和方案选择提供一些有益的建议。     

宝兰客专综合网管系统方案探讨

本文结合宝兰客专项目建设,根据综合网管技术的特点,结合各个系统的需求分析,对宝兰客专综合网管的系统建设目标、总体设计、接口方案进行了分析,并对工程部署方案进行了探讨。     

SDH传送网网管体系结构的研究和实验

为了满足ＳＤＨ网络管理系统在可持续建设和高适应性方面的要求，提出了采用软件总线和多粒度软件重用技术的ＳＤＨ网管系统的体系结构，实现了一个基于该体系结构的ＳＤＨ网管的实验系统。     

GSM网络中建设虚假主叫实时监控的可行性分析

针对虚拟主叫号码的呼叫进行分析和研究,建设虚拟主叫监控系统,并通过与信令监测系统、综合网管、综合营帐等多个系统的实时接口,建立多平台之间联合诊断,实现对虚假主叫实时判断和拦截的自动化处理流程。     

高可靠性网管网络的研究

网管网络是网管系统的关键部分,主要实现网管信息承载功能.研究如何实现高可靠性网管网,并通过研究带外网管、带内网管、应急拨号等网络,详细分析各种网管网络的特点,为高可靠性网管网络的设计和实现提供参考.     

基于SNMP协议的通信综合网管设计

本文介绍了网络管理、SNMP协议、MIB、网管代理等基本概念,立足通信总站网管现状和通信综合网管建设的需求,对基于SNMP协议、以Ethernet局域网为网络平台的综合网管系统的设计实现进行了描述。     

浅谈电力通信网络管理系统结构

分析了电力系统专用通信网的管理要求,针对网络管理层次多、设备种类多、网络结构复杂的特点,从技术的角度提出了建设电力通信网网络管理系统的基本要求及解决方案。方案以TMN为基础兼容其他网管系统标准,强调接口的开放性,强调系统的一体化和独立性,强调网络化和对各种体系结构的兼容性。为网管系统设计和方案选择提供一些有益的建议。     

三端1．3μmInGaAsP／InP双区共腔激光器

研制成功了弱调Ｑ及强调Ｑ两种三端１．３μｍＩｎＧａＡｓＰ／ＩｎＰ双区共腔激光器，其Ｐ／Ｉ特性分别呈二极管激射特性和吸收型双稳特性。两种激光器均实现了室温连续（直流）工作，吸收区电极的设置使两种器件的Ｐ／Ｉ特性均获得了大范围调节。     

三端1.3μm InGaAsP／InP双区共胺激光器

研制成功了弱调Ｑ及强调Ｑ两种三端１．３μｍ ＩｎＧａ ＡｓＰ／ＩｎＰ双区共腔激光器，其Ｐ／Ｉ特性分别呈二极管激射特性和吸收型双稳特性，两种激光器均实现了室温连续（直流）工作，吸收区电极的设置使两种器件的Ｐ／Ｉ特性均获得了大范围调节。     

试验温度和缓蚀剂用量对缓蚀效果的影响

研究了试验和聚氨杂环季铵盐缓蚀剂（ＦＱ－Ｃ）的用量对Ａ３钢在盐酸中缓蚀效果的影响，建立了试验温度、ＦＱ－Ｃ用量与缓蚀率之间的经验关系式。     

XRD and TEM Analysis in the Interface of Diffusion Bonding for Fe3Al/Q235 Dissimilar Materials

Phase structure characteristics near the interface of Fe3Al/Q235 diffusion bonding are investigated by means of X raydiffraction (XRD), transmission electronic microscope (TEM) and electron diffraction, etc. The test results indicatedthat obviously a diffusion transition zone forms near the interface of Fe3Al/Q235 under the condition of heatingtemperature 1050~1100℃, holding time 60 min and pressure 9.8 MPa, which indicated that the diffusion interfaceof Fe3Al/Q235 was combined well. The diffusion transition zone consisted of Fe3Al and a-Fe(Al) solid solution.Microhardness near the diffusion transition zone was HM 480~540. There was not brittle phase of high hardness inthe interface transition zone. This is favorable to enhance toughness of Fe3Al/Q235 diffusion joint.     

Scalability analysis of diffractive optical element-based free-space photonic circuits for interoptoelectronic chip interconnections

An interchip free-space optical interconnection module is investigated to solve the pin-input-output bottleneck at the interface of silicon integrated circuits. The scalability of the photonic circuit is theoretically analyzed by use of the minimum feature size requirement of each diffractive element used. The study showed that interconnection densities of 1000-2000 channels/cm is possible for a 40-mm interconnection length with a 3-mm-thick optical substrate. Diffraction-limited imaging capability has been demonstrated using a fabricated prototype, confirming its applicability for interchip free-space interconnections. Photonic circuit insertion losses of -23.4 dB for TE polarization and -25.9 dB for TM polarization as well as a polarization-dependent loss of 2.5 dB are found to be caused primarily by a pair of binary linear gratings used for beam deflections. Design modifications aiming at insertion loss reduction and further improvement of tolerance capabilities are also discussed.     

Effect of Cr and Ni on diffusion bonding of Fe3Al with steel

Microstructure at the diffusion bonding interface between Fe₃Al and steel including Q235 low carbon steel and Cr18-Ni8 stainless steel was analysed and compared by means of scanning electron microscopy and transmission electron microscopy. The effect of Cr and Ni on microstructure at the Fe₃Al/steel diffusion bonding interface was discussed. The experimental results indicate that it is favourable for the diffusion of Cr and Ni at the interface to accelerate combination of Fe₃Al and steel during bonding. Therefore, the width of Fe₃Al/Cr18-Ni8 interface transition zone is more than that of Fe₃Al/Q235. And Fe₃Al dislocation couples with different distances, even dislocation net occurs at the Fe₃Al/Cr18-Ni8 interface because of the dispersive distribution of Cr and Ni in Fe₃Al phase.     

用于计算机总线并行互连的高速光互连链路

设计和实现了基于计算机ＰＣＩ总线的高速光互连链路。链路的网络接口卡具有３２位并行输入／输出接口,中间采用时分复用同步传输技术,在一根光纤中实现了ＰＣＩ总线数据的虚拟并行传输。链路的最高数据传输速率为１２５０Ｍｂｉｔ／ｓ,使用多模光纤时最大传输距离为６４０ｍ,在１０米传输距离时,通信延迟低于２００ｎｓ。     

高速钢-Q235钢轧制复合板的组织与性能

采用合适的工艺方法制备了两种高速钢(W18Cr4V,W6Mo5Cr4V2)与Q235钢的轧制复合板材,用剪切试验方法测定了复合板材的界面结合强度,用光学显微镜和扫描电子显微镜观察了复合板材界面结合状态.复合板材界面结合强度达到460MPa,界面结合良好,能够满足复合刀片对材料性能的要求.     

Micro-image analysis in the diffusion-bonded zone of Fe3Al/Q235 carbon steel dissimilar materials

The chemical composition of the second phase precipitation in the vacuum diffusion-bonded zone of Fe₃Al intermetallic compound and Q235 carbon steel was analysed by means of electron probe microanalyser (EPMA). The relative content of the second phase precipitation and grain size was evaluated through a micro-image analyser. The percentage of Fe and Al content in the diffusion zone was measured by EPMA. The results indicated that the relative content of the second phase precipitation rich in carbon and chromium at the Fe₃Al/Q235 interface was much higher. With the transition from Fe₃Al intermetallic compound to Q235 carbon steel across Fe₃Al/Q235 interface, the grain diameter decreased from 250 μm, to 112 μm, Al atom content decreased from 27% to 15%, while Fe atom content increased from 76% to 96%.     

Diffusivity of Al and Fe near the diffusion bonding interface of Fe3Al with low carbon steel

The distribution of elements near the Fe₃Al/Q235 diffusion bonding interface was computed by the diffusion equation as well as measured by means of EPMA. The results indicated close agreement between the two for iron and aluminium. Diffusion coefficient in the interface transition zone is larger than that in the Fe₃Al and Q235 steel at the same temperature, which is favourable to elemental diffusion. The diffusion distance near the Fe₃Al/Q235 interface increased with increasing heating temperature,T , and the holding time, t. The relation between the width of the interface transition zone,x , and the holding time,t , conformed to parabolic growth law: x bd² = 4.8 × 10⁴ exp(-133/RT) bdt -t ₀bd. The width of the interface transition zone does not increase significantly for holding times beyond 60 min.     

含界面相三维全五向编织复合材料拉伸行为模拟及失效机制研究

基于三维全五向（Q5D）编织复合材料的细观结构模型,通过引入界面相单元,建立了含界面相Q5D编织复合材料单轴拉伸损伤失效分析模型。应用Python语言实现对ABAQUS的二次开发,将Linde等提出的失效准则和Von-Mises应力准则分别用于纱线和基体的渐进损伤判断,并确定材料的整体失效模式;对于界面相,采用Quads准则进行损伤判断。利用周期性位移边界条件,对含界面相Q5D编织复合材料的纵向拉伸应力-应变行为进行了渐进损伤数值模拟,详细讨论了在纵向拉伸载荷作用下材料的细观损伤起始、扩展和最终失效的演化过程,分析了材料的细观损伤失效机制,预测了材料的极限破坏强度,并研究了界面相性能对材料整体力学行为的影响规律。研究结果表明,数值模拟结果与实验值吻合较好,验证了渐进损伤模型的有效性,为该类材料的力学分析和优化设计奠定了基础。     

316L-Q345R不锈钢复合板性能评价

从微观组织和显微硬度两方面对真空热轧316L-Q345R不锈钢复合板试样性能进行评价。采用电子显微和能谱分析技术,对试样进行微观组织特征观察和成分含量测定,研究相结构及成分变化规律。通过硬度测试仪对复合板界面附近硬度进行测量,研究微观组织与硬度关系。结果表明:热轧后复合板Q345R侧显微组织以铁素体和珠光体为主,316L侧显微组织为单一奥氏体,一部分晶粒呈孪晶状态,Q345R低合金钢和316L不锈钢经过热轧可良好复合,复合界面平直;界面两侧元素存在扩散现象,不锈钢中Cr,Ni元素向低合金钢侧扩散,在界面形成富Cr,Ni薄层,低合金钢中C向不锈钢侧产生少量迁移;在复合界面处的硬度值较大,低合金钢侧远离界面位置复合板硬度与Q345R本身硬度值接近,而从界面到不锈钢侧硬度呈现先下降后上升至稳定的趋势。     

Hierarchical optical ring interconnection (HORN): scalable interconnection network for multiprocessors and multicomputers

A new interconnection network for massively parallel computing is introduced. This network is called a hierarchal optical ring interconnection (HORN). The HORN consists of a single-hop, scalable, constant-degree, strictly nonblocking, fault-tolerant interconnection topology that uses wavelength-division multiple access to provide better utilization of the terahertz bandwidth offered by optics. The proposed optical network integrates the attractive features of hierarchical ring interconnections, e.g., a simple node interface, a constant node degree, better support for the locality of reference, and fault tolerance, with the advantages of optics. The HORN topology is presented, its architectural properties are analyzed, and an optical design methodology for it is described. Furthermore, a brief feasibility study of the HORN is conducted. The study shows that the topology is highly amenable to optical implementation with commercially available optical elements.