基于保护卡的机房系统规划模式研究

该文通过对硬盘保护卡的特性及其主要保护模式的分析,提出了基于保护卡的通用性规划和专用性规划两种机房系统规划模式,并对两种模式进行了比较和分析。     

盘型闸制动间隙安全隐患及对策

提升机闸控系统是提升机能否安全运行的主要部位，闸盘制动间隙是关系到制动系统能否安全。可靠动作的重要因素，通过对闸间隙由行程开关监视到电子连续监视的介绍，提出了闸间隙监视的方式。     

A highly scalable structure for WDM multihop lightwave networks

In this paper, the author proposes a new virtual topology, referred to as fully connected cubic network (FCCN), for the wavelength division multiplexing (WDM) multihop lightwave network. The FCCN is a multi-level, highly scalable and modular architecture. Anm level FCCN is constructed by “fully connecting” 8 (m−1)-FCCNs. The FCCN satisfies very well all the design requirements for WDM lightwave networks. The nodal degree is no more than four, and independent of the network size. Both the diameter and the average hop distance are in the order of . Owing to the highly scalable structure, the routing algorithm proposed in this paper is very simple to implement. Wavelengths reuse technique can be applied with high efficiency to FCCN. Project supported by Zhejiang University Cao Guangbiao Technology Development Funding(413C01302*29808)     

用Debug工具实现多引导操作系统

介绍了硬盘分区的基本概念,计算机的启动过程以及硬盘主引导记录结构,并对多重引导的原理进行了阐述,同时给出了多操作系统引导的几种方案和用D ebug修改主引导记录实现多引导的具体方法。     

光纤通信系统中2/8转换单元的设计

提出了以2／8转换芯片为核心的2／8转换单元的一种设计方案，将CPLD／FPGA技术与光纤通信技术结合，其技术指标符合ITU—T建议G．703的要求，使产品外围电路简单，成本低，可靠性高。     

关于USB信号及其光纤传输电路分析

对USB信号以及一种通过光纤传输USB(通用串行总线)信号的电路作了较详细的分析.此电路将USB信号D ,D-的三种状态转换为发射激光的三种强度全亮、半亮、暗,并且通过光纤传输到对方激光接收器,再通过相应电路恢复D ,D-的三种状态.激光接收器电路的输出信号之一触发单稳延时电路来控制D ,D-与激光发射电路、激光接收电路的通与断,以此实现USB信号的光纤传输.     

UV覆盖优化标准的初步研究

UV覆盖是光学综合孔径成像技术中一个关键环节,它决定于孔径阵列的排列情况,且影响到后续的图像恢复工作,所以,必须对UV覆盖进行优化,但优化标准目前尚未确定.本文利用统计的方法从研究图像频谱的高低频特性入手,从对不同方式下UV覆盖对后续的图像恢复造成的影响情况的分析比较,进行优化标准的初步研究与探讨.     

NiSO4·6H2O晶体的光谱、EPR谱和X射线衍射实验值的统一解释

采用半自洽场(semi-SCF) d-轨道模型和点电荷模型,通过完全对角化方法,对NiSO4·6H2O晶体的吸收光谱,EPRg因子和零场分裂D、E以及X射线衍射实验值作出了新的统一解释,确定了该晶体畸变后的局部对称结构近似为D4h对称和Ni-O键长为R□=0.1996nm 、R//=0.2138nm,键长和键角的变化分别为ΔR□=-0.0024nm 、ΔR//=0.0058nm、Δφ=0.003°.理论计算结果与实验值符合得很好.     

类明孤子脉冲在色散搭配光纤中传输特性的研究

应用变分法 ,研究了类明孤子脉冲在色散搭配光纤中的传输特性 ,导出了类明孤子脉冲参数的演化方程组     

A novel 3-stage structure for a low-noise,high-gain and gain-flattened L-band erbium doped fiber amplifier

The configuration of the novel three-stage L-band erbium-doped fiber amplifier with very large and flat gain and very low noise figure presented in this paper uses the forward ASE (amplified spontaneous emission) from the first section of the EDF (erbium-doped fiber) and the backward AS E from the third section of the EDF (both serve as the secondary pump sources of energy) to pump the second EDF. To improve the pump efficiency, the power of the pump is split into two parts(with a ratio of e.g. 2:7). The characteristics of this L-band EDFA are studied on the basis of the Giles Model with ASE.