含纳米铜的减摩修复添加剂摩擦学性能及其作用机理研究

在不同条件，不同接触形式下考察了含钠米铜的减摩自修复添加剂的摩擦学性能，以及对不同油品的影响规律。结果表明，添加剂NFR2具有优良的减摩抗磨性能，用于液体石蜡，16号坦克油和15W／30油中，磨斑直径分别降低了42％，56％和19％，摩擦系数分别降低了50％，49％和33％。其修复性能试验后，出现了负增重现象，而添加剂NFR1具有良好的高温抗磨减摩性能，用于16号坦克油中，磨损降低了56％，摩擦系数降低了27％，其热管氧化情况与16号坦克油空白试验相似。XPS，SEM等表面技术分析结果表明，摩擦表面生成含Mo,S,P和O等元素的摩擦化学反应膜，其中Mo主要以＋6价形式存在，元素S主要以－2价和＋6价形式存在，元素P主要以＋5价形式存在。     

A time domain approach for avoiding crosstalk in optical blockingmultistage interconnection networks

Crosstalk in multistage interconnection networks can be avoided by ensuring that a switch is not used by two connections simultaneously, in order to support crosstalk-free communications among N inputs and N outputs, a space domain approach dilates an N×N network into one that is essentially equivalent to a 2N×2N network. Path conflicts, however may still exist in dilated networks. This paper proposes a time domain approach for avoiding crosstalk. Such an approach can be regarded as “dilating” a network in time, instead of space. More specifically, the connections that need to use the same switch are established during different time slots. This way, path conflicts are automatically avoided. The time domain dilation is useful for overcoming the limits on the network size while utilizing the high bandwidth of optical interconnects. We study the set of permutations whose crosstalk-free connections can be established in just two time slots using the time domain approach. While the space domain approach trades hardware complexity for crosstalk-free communications, the time domain approach trades time complexity. We compare the proposed time domain to the space domain approach by analyzing the tradeoffs involved in these two approaches     

特低渗油藏水平井布井方式研究

本文以西峰油田董志区长8油藏为例，运用数值模拟技术，研究了水平井组合方式及其井网形式。研究结果表明，水平井是提高特低渗油藏开发效果的有效途径。结合长庆特低渗储层吸水性能好的特点，认为采用直井注水，水平段走向垂直于储层最大主应力方位的水平井采油的井网组合开发效果最佳。     

FLORA HJII 3200/12SE升级型数码喷绘机

神HJII 3200／12SE（简称：3212SE）是其工业级数码喷绘机系列中的重要一款。其外观稳重大方，速度卓越非凡，图像输出精美。此款机器近年已先后在国内外各种展会上展示，包括美国的ISA、SGIA展会，德国的FESPA展会以及我国的上海国际展等。依靠其杰出的性能，3212SE得到了众多客户特别是欧美客户的青睐。     

机械合金化制备金属难熔化合物

在介绍机械合金化特点的同时，重点研究和讨论了机械合金化制备金属难熔化合物的过程及机理，并认为机械合金化是制备难熔化合物及其材料的一种行之有效的方法。     

中小企业创业资源的形成机制研究

创业资源是创业的基础,创业过程的规律性和市场配置资源的基础作用影响和决定中小企业创业资源的内在功能和形成方式。对中小企业资源的形成机制进行了分析探讨,并分析了它们之间的内在关系。     

规范经营管理提高经济效益

通过3个电站的调研，对作为小水电企业而言，只有切实加强工程建设管理，实行项目法人责任制，就能确保电站工程建设达到设计要求、工程质量优良；提高电站自动化运行水平，更能保证电能质量、电网运行安全稳定、降低发电成本；进一步规范电站管理，对人员实行“工效挂钩、绩效挂钩”，才能进一步提升市场竞争力、提高经济效益。     

Dielectric modeling of transmittance spectra of thin ZnO:Al films

A dielectric model comprising band gap transitions and free electron excitations (Drude model) is successfully applied to simulate transmittance spectra of ZnO films doped with 0.5%, 1% and 2% Al. The Drude formula contains a frequency-dependent damping term in order to get a good fit in the visible spectral region. Useful physical parameters obtained from the fit are electron density and mobility within the grains, film thickness, band gap and refractive index. The optically determined film thickness agrees with that obtained with the stylus method within 2%. The optically determined electronic parameters are compared with those obtained by electrical measurements. Contrary to thin In₂O₃:Sn films, the Drude mobility inside the grains is similar to the direct current Hall mobility indicating more perfect film growth without forming pronounced grain boundaries. Maximum value is 35 cm²/V s. The effective electron mass is estimated to be about 0.6 of the free electron mass. The refractive index at 550 nm decreases with increasing electron density.     

发展是企业的根本出路

通过对中国铝工业发展历程的回顾以及与国外铝企业的比较，找出了中国铝工业存在的优势和差距。就中国铝工业应如何解决前进中存在的问题和今后几年的发展目标进行了探讨。