小型CPL用高性能烧结毛细芯的研制

采用粉浆浇注工艺和氢气还原烧结工艺研制小型CPL用烧结镍毛细芯，通过优选粉浆液固比、添加剂的种类与数量、浆料pH值等参数制备了符合设计要求的烧结毛细芯。测试了毛细芯孔径、孔隙分布特征、孔径分布、孔隙度、渗透率等性能参数，分析了烧结气氛、温度、时间对毛细芯性能的影响。试验结果表明，研制的毛细芯孔隙度在68％以上，孔隙尺寸约4μm，渗透系数在10^-12～10^-13m^2之间。     

Optical absorption and fluorescence properties of Er3+ in sodium borate glass

Spectroscopic properties of Er³⁺ ions in sodium borate glass have been studied. The indirect and direct optical band gaps (E_opt) and energy level parameters (RacahE ¹, E² and E³), spin-orbit (ξ_4f) and configurational interaction (α)) are evaluated. Spectral intensities for various absorption bands of Er₃₊ doped sodium borate glass are calculated. Using Judd-Ofelt intensity parametersΩ ₂, Ω₄, Ω₆, radiative transition probabilities (A), branching ratios (β) and integrated absorption cross sections (Σ) are reported for certain transitions. The radiative lifetimes (τ_R) for different excited states are estimated. From the fluorescence spectra, the emission cross section (σ_P) for the transition,⁴I_13/2 → ⁴I_15/2 is reported.     

On the reinitialization procedure in a narrow‐band locally refined level set method for interfacial flows

A local level set algorithm for simulating interfacial flows described by the two‐dimensional incompressible Navier–Stokes equations is presented. The governing equations are solved using a finite‐difference discretization on a Cartesian grid and a second‐order approximate projection method. The level set transport and reinitialization equations are solved in a narrow band around the interface using an adaptive refined grid, which is reconstructed every time step and refined using a simple uniform cell‐splitting operation within the band. Instabilities at the border of the narrow band are avoided by smoothing the level set function in the outer part of the band. The influence of different PDE‐based reinitialization strategies on the accuracy of the results is investigated. The ability of the proposed method to accurately compute interfacial flows is discussed using different tests, namely the advection of a circle of fluid in two different time‐reversed vortex flows, the advection of Zalesak's rotating disk, the propagation of small‐amplitude gravity and capillary waves at the interface between two superposed viscous fluids in deep water, and a classical test of Rayleigh–Taylor instability with and without surface tension effects. The interface location error and area loss for some of the results obtained are compared with those of a recent particle level set method. Copyright © 2005 John Wiley & Sons, Ltd.     

关于球罐球片包装架的结构分析

球片包装架是球罐产品包装及运输过程中必需的结构件，然而在实际使用过程中，包装架系列过于安全。从而产生材料消耗较大、铁路运输成本升高等因素。用力学方法，通过对包装架进行合理的受力分析和计算，并以此为理论根据，本着安全、合理及高效的原则，可以降低包装架主体构件——承重梁(槽钢)型号，或增加包装架承重量的方式，对球片包装架构件进行重新设计，从而可以节省材料,增加效益。     

随机早期诊断(RED)队列管理算法的改进研究

本文总结了近十年来RED队列管理机制的各种改进研究思路，并对限制高带度流量进行了仿真以证实其对丢包性能的影响，最后分析了根据总的丢包量度大小来估计某流量的到达率的不合理性，从而我们很有必要利用仿真工具来验证比分析的正确性，并对RED加以修正使其拥塞控制的性能更好。     

Effects of Deposition Temperature on the Properties of Fluorinated Amorphous Carbon Films

Fluorinated amorphous carbon films (a-C:F) were prepared at different temperatures using a microwave electron cyclotron resonance chemical vapor deposition (ECR-CVD) reactor with CHF3 and C2H2 as source gases. Films were annealed at 500℃ in vacuum ambience inorder to investigate the relationship of their thermal stability, optical and electrical propertieswith deposition temperature. Results indicate that the films deposited at high temperature have a less CFx bonding and a more cross-linking structure thus a better thermal stability. They also have a lower bandgap, higher dielectric constant and higher leakage current.     

基于有线电视宽带网的远方抄表系统的研究与应用

介绍了一种基于有线电视宽带网的远方抄表系统。该系统由大连电业局与大连天途有线电视股份有限公司、深圳洁宁达电能仪表制造有限公司联合开发，并在大连电业局进行了试点应用。该系统由单相电子式多费率电能表、RS485／RF转换器、有线电视射频网、有线电视数据网、大连电业局局域网、有线电视调制解调器、防火墙、中间服务器和远抄工作站等组成。有线电视通道具有双向功能，可以实现远方侦测、远方预付费、远方断电合闸等功能。利用有线电视网作为传输通道进行远方抄表，可以抄读电表实时数据，抄读速度快、数据传输可靠性高、投资费用低，具有一定的推广价值。     

万家寨大泵下环铸造工艺研究

本通过优化铸造工艺设计及改进，提出了消除铸件缺陷的措施，解决了泵轮下环在制定工艺过程中存在的问题，适用于大、中型铸造行业。     

GAC柱吸附带长与设计流速的相关性分析

在动态柱状试验基础上，建立了炭柱中设计流速与活性炭吸附带长度的数学模型，对净水装置炭柱高度设计具有指导意义。