图形电镀铜的常见缺陷及故障排除

本文主要阐述印制电路板生产中图形电镀铜常见缺陷及成因,查找影响其品质的因素和工序并结合相关生产制定相应的预防措施,有效提高产品质量。     

H级干式变压器的现状及其发展前景

介绍了H级干式变压器的分类、NOMEX^R纸的技术性能、各类H级干式变压器的结构特点与技术性能，将H级干式变压器与环氧浇注式干式变压器进行了比较，并展望了H级干式变压器未来在我国的发展前景。     

基于VXI总线的机载火控系统自动测试仪的设计

目的　对作战飞机火控系统的故障检测 ,传统的方法是使用多种检测仪器对机载火控设备进行性能检查 ,不仅技术含量低 ,也给飞机转场后技术阵地的转移带来不便 ,不能满足现代战争的需要 ,为提高战机的作战效能和快速反应的能力 ,研制了机载火控系统自动测试仪 .方法　采用 VXI总线技术、合理的硬件配置和在 Lab Windows/CVI环境下的软件模块化设计方案 .结果　在实际应用中取得了良好效果 ,为技术人员进行机载火控系统的性能及故障检测提供了便利 .结论　该测试仪具有测试结果准确 ,自动化程度高 ,工作稳定可靠 ,操作简便 ,易于转移和维护等优点 ,并具有较高的抗干扰能力 ,不仅适用与内场 ,还可用于在外场对机载火控系统进行原位检测     

Lipase‐catalyzed dynamic kinetic resolution of (R,S)‐fenoprofen thioester in isooctane

A lipase‐catalyzed enantioselective hydrolysis process under in situ racemization of the remaining (R)‐thioetser substrate with trioctylamine as the catalyst was developed for the production of (S)‐fenoprofen from (R,S)‐fenoprofen 2,2,2‐trifluoroethyl thioester in isooctane. Detailed investigations of trioctylamine concentration on the enzyme activation and the kinetic behavior of the thioester in racemization and enzymatic reactions were conducted, in which good agreement between the experimental data and theoretical results was observed. © 2002 Society of Chemical Industry     

十六烷基辛基二甲基溴化铵和十六烷基癸基二甲基溴化铵的合成

合成了十六烷基辛基二甲基溴化铵和十六烷基癸基二甲基溴化铵两个新型杀生剂。用元素定量分析和红外光谱核磁共振谱等方法进行分析和结构鉴定。评定了两个化合物对硫酸盐还原菌的杀生作用。结果表明，两个化合物有很好的杀生效果。     

Investigation on compounding and application of C80-C100 high-performance concrete

This paper presents the compounding technology and application of C80-C100 high-performance concrete (HPC) containing ultra-pulverized fly ash composite (PFAC) and superplasticizer. The properties of C80-C100 HPC are also studied systematically. The experimental results indicate that this concrete has excellent workability, high strength, lower drying shrinkage, outstanding volume stability, durability, etc.     

水稻花后衰退珠心和胚乳发育初期Ca2+的超微细胞化学定位

应用焦锑酸盐沉淀技术对水稻花后衰退珠心和胚乳发育初期进行了Ca^2 的超微细胞化学定位。结果显示在初始衰退的珠心细胞中Ca^2 主要分布于液泡膜上和核内；在衰退中期的珠心细胞中，Ca^ 主要分布在核膜、液泡膜及质膜上；在严重衰退的珠心细胞，Ca^2 仅存在于液泡中。珠心降解的Ca^2 跨过胚囊壁，通过质外体向胚乳内运输；发育初期的胚乳细胞，Ca^2 主要位于胞间隙，线粒体和液泡中也有少量分布。讨论了Ca^2 与珠心PCD的关系。     

微电量测量中信号的拾取和放大

本文介绍了静电计级运算放大器在工业微电量测量中的应用,并且给出了实际的电路结构和相关的噪声解决办法。     

设计IIR数字滤波器的遗传优化算法

提出了ＩＩＲ数字滤波器设计的遗传优化法。这是一种模拟自然遗传和达尔文进化理论的随机并行优化算法。首先，详细描述了遗传算法并给出了计算步骤，然后将遗传算法用于ＩＩＲ数字滤波器的优化设计，最后给出了模拟计算结果。     

Improved method for HgI2 crystal growth and detector fabrication

Instead of the temperature oscillation method (TOM), a modified vapor growth method was applied in this paper to grow large HgI₂ crystals with fewer lattice defects by providing a relatively stable temperature field during growth. And a new processing technique of HgI₂ crystals was developed for detector fabrication by merging solution string-sawing and hand-cleaving. The lattice deformations caused during cleaving were reduced greatly by eliminating passivated layers on the sawed crystal platelets before cleaving.