宽带抽运情况下乙醇、丙酮溶液中受激拉曼散射光谱的实验研究

研究了乙醇、丙酮两种拉曼介质在宽带抽运情况下啁啾激光脉冲的受激拉曼散射频谱特性 ,得到的一级Stokes光频谱宽度与抽运光基本相当 ,且具有较高的转换效率 ,从而表明了利用“展宽—受激拉曼散射—压缩”的办法获得波长近 1μm的飞秒级超短脉冲激光信号源的实验方案具有可行性     

环境因素对碳钢点蚀临界电势的影响

采用动电势扫描法测定了不同体系中碳钢发生点蚀的临界电势Eb。结果表明 :当Cl- 浓度 <0 .0 1mol/L时 ,随Cl- 浓度增加 ,临界电势负移并与Cl- 浓度成线性关系 ;pH值在 7～ 11之间 ,随pH值增加 ,临界电势正移并与pH值成线性关系 ;随温度增加 ,临界电势负移并与温度成线性关系。     

电子封装用金属基复合材料的制备

分析了电子封装用金属基复合材料的性能特点及其对制备工艺的要求，在此基础上论述了该种材料的各种制备工艺的特点及发展现状。     

Solution of the Inverse Problems of Scattering of Electromagnetic Fields by Elongated Defects

We formulate the inverse problem of scattering of electromagnetic fields by thin defects and analyze numerical algorithms used for its solution. It is shown that, in the two-dimensional case, the shape of a thin defect is completely determined by the scattered field given on a certain curve for a fixed value of the wave number. For the solution of the inverse scattering problem, we propose to use the procedure of iterative regularization based on the gradient methods. We deduce expressions for the Fréchet derivative of the operator of direct scattering problem with Dirichlet conditions imposed on the surface of a scatterer.     

垦东地区上第三系馆陶组上段成藏规律研究

通过对山东垦东地区构造特征，地层特征和储层特征的研究，从油气运聚，储盖组合，油藏类型及分布和油气控制因素等方面对馆陶组上段成藏规律进行了综合分析，研究表明，研究区的储层主要为曲流河沉积砂体，原油来源于周边的4个生油凹陷，通过不整合曲，储集层以及断层运移到垦东地区后聚集成藏。     

基于栅格法-模拟退火法的机器人路径规划

路径规划是机器人技术中的重要组成部分,分全局路径规划和局部路径规划。本文将栅格法与模拟退火法结合,采用栅格法表示环境信息。局部路径规划主要基于模拟退火法,使路径跳出局部极小点,到达目标位置。     

Production of high-strength tubes made of steels of type 15GFB

A unit for making L-class high-strength pump-compressor tubing composed of low-carbon, low-alloy steels of type 15GFB is now being used on the 140 mill in the tube-rolling shop at the Rustavi Metallurgical Plant. The steel 15GFB pump-compressor tubing made by the technology that was developed has the following service properties: σ_y = 630–670 N/mm², σ_u = 730–780 N/mm², δ = 18–22%, ψ = 55–60%, KCU = 1.6–2.2 MJ/m². The percentage of ductile fracture at room temperature is 85–95%. __________ Translated from Metallurg, No. 1, pp. 79–80, January, 2006.     

二次混合机改造

南钢烧结厂二次混合机通过降低筒体的仰角、提升筒体的转速,增加了混合料的混匀时间,提高了混合料的造球效率,介绍了设计中各种部件的选型和校核计算,该设备投产后大幅度提高了生产能力。