电力通信网中传输性能损伤评估方案

电力系统缺少明确的电力通信系统可靠性定义和定量的测度判据,仅用通信通道中断衡量通信网的可靠性不科学,不能客观反映通信网的真实运行情况. 前人的研究并没有考虑非线性影响,对传输性能的估计十分粗糙,也没有考虑自相位调制和色散导致的性能劣化影响. 因此在前人工作的基础上,综合考虑线性和非线性影响,采用光脉冲展宽作为评估指标,通过理论计算接收端光脉冲的展宽来估计系统传输代价. 最后通过仿真验证传输性能评估的可行性和有效性.     

Investigation on pulsed discharge mode in SF_6-C_2H_6 mixtures

The non-chain chemical HF(DF)laser is one of the most powerful electrically-driven lasers operating in mid-infrared,in which SF6-C2H6 mixtures are often used as lasering media.Due to the electronegativity of SF6,the discharge in SF6-C2H6 presents a complicated discharge mode.To achieve reproducible pulsed laser output,pulsed discharge in SF6-C2H6 mixtures is investigated for discharge mode using plane electrodes assisted by array pre-ionization spark pins in cathode surface.Firstly,two modes can be distinguished.One mode is called the selfsustained volume discharge(SSVD),which is characterized by spatial uniformity in the discharge gap and pulse to pulse repeatability.On the contrary,another mode includes random arc passages in the discharge gap and therefore cannot conduct lasering.By varying discharge conditions(gap voltage,gas pressure,etc)two discharge modes are observed.Secondly,the holding scope of the SSVD mode is analyzed for the optimal mixture ratio of 20:1,and the boundary tend of the holding scope of SSVD indicates there exists maximum gas pressure and maximum charging voltage for SSVD.Finally,the peak current of SSVD relates positively to charging voltage,while negatively to gas pressure,from which it is drawn that synchronous electron avalanches initiated by the sliding array overlap spatially into SSVD and thus SSVD is essentially an α ionization avalanche.     

河南某铁铜矿石优先浮铜尾矿弱磁选铁试验

河南某铁铜矿石结构构造及矿物组成均较简单,有用矿物磁铁矿和黄铜矿的粒度均较粗。为了确定2粗3精2扫闭路优先浮铜尾矿弱磁选选铁的合理工艺流程,开展了直接1粗1精弱磁选、弱磁粗选精矿磨矿后弱磁精选、先磨矿后1粗1精弱磁选3种工艺选铁试验。结果表明,弱磁粗选精矿磨矿后弱磁精选工艺效果最佳,在再磨细度为-0.074 mm 90%、弱磁粗选和弱磁精选磁场强度分别为95.54 kA/m和67.58 kA/m情况下,可获得铁品位65.50%、回收率53.53%的铁精矿。     

一种新型的基于PCE的多层多域GM-PLS／ASON光网络体系结构

With the development of large-scale, multi-region and multi-layer networks, policy-based and constraint-based path computation is more and more complicated and dynamic routing becomes one of the key issues in GMPLS/ASON networks. To combine the advantages of both GMPLS control plane and PCE, novel dual routing engine architecture of multi-layer and multi-region scalable optical networks is proposed in this paper. The collaboration of group engine and unit engine makes it effective to optimize path computation especially under the condition of complex multi-constraints. The functional architecture of dual routing engine is detailed. Different potential co, operation relationships between group engine and unit engine are investigated and simulation results for multi-region and multi-layer routing schemes are analyzed.     

软件定义光接入网

提出一种基于软件定义的光接入网架构,可提升网络资源利用率,实现业务灵活接入与高效智能调度。该架构通过采用软件定义的光接入设备,可使接入网具备控制集中化、资源虚拟化、业务服务化等特点,进而降低网络运维成本,提升用户终端体验,为构建下一代简单、弹性、智能光接入网提供技术手段。     

酚醛竹丝梭的应用开发

本文简述了我国梭子的发展情况,介绍了酚醛竹丝梭的工艺路线,分析了制造酚醛竹丝梭的几个关键技术问题以及当前竹丝梭存在的问题.指出随着纺织工业经济的回升,越来越多的纺织厂家将使用竹丝梭代替木梭.     

基于QT/Embedded的γ能谱仪数据处理软件设计

γ能谱仪器的数据处理软件在整个仪器设计中起着重要的作用。本文介绍了用于便携式γ能谱仪的数据处理软件设计。本设计是基于嵌入式Linux操作系统和QT/Embedded GUI平台库上实现的。使得该软件有着良好的界面和数据处理能力。     

八钢3号转炉升级改造工程施工管理浅议

八钢3号转炉升级改造工程的特点是不停产改造,施工的工程难度很大,介绍八钢股份公司第一炼钢厂转炉升级改造工程的施工组织、管理。