Effect of surface modification of metal hydride electrode on performance of MH/Ni batteries

A novel method was applied to the surface modification of the metal hydride(MH)electrode of MH/Ni batteries.Both sides of the electrode were plated with a thin silver film about 0.1μm thick using vacuum evaporation plating technology,and the effect of the electrode on the performance of MH/Ni batteries was examined.It is found that the surface modification can enhance the electrode conductivity and decrease the battery ohimic resistance.After surface modification,the discharge capacity at 5C(7.5A)is increased by 212 mA.h and the discharge voltage is increased by 0.11 V,the resistance of the batteries is also decreased by 32%.The batteries with modified electrode exhibit satisfactory durability.The remaining capacity of the modified batteries is 89%of the initial capacity even after 500 cycles.The inner pressure of the batteries during overcharging is lowered and the charging efficiency of the batteries is improved.     

转轮体铸造工艺的优化设计

本文重点总结了水轮机的重要部件转轮体常发生的主要铸造质量问题,分析了产生缩孔缩松、裂纹、尺寸超差等质量问题的主要直接原因,并提出了铸造工艺优化设计方案。     

汉代乐舞题材画像石的艺术特色研究

画像石是汉代文化艺术的重要组成部分,对汉代的社会生活作了全面描绘,乐舞文化是画像石中表现较多的题材之一。汉乐舞画像石的概括性、变形性、现实性、自由性及旋律性是其主要的艺术特色。汉画像石的独特艺术魅力让人们领略了汉代的文化生活,满足了审美需求。其所取得的艺术成就在中华美术史上留下了浓重的一笔。对汉乐舞画像石的研究能够为研究汉代的政治经济、文化艺术及民俗生活提供帮助,为现代人的艺术创作带来启示。     

为互联网和数据中心业务定制的服务器——云计算资源池的最佳选择

随着云计算技术的不断发展,基于云计算定制的服务器在互联网和数据中心的应用日益广泛,各种解决方案层出不穷。本文通过分析服务器和云计算的技术特点,比较各种硬件解决方案的异同,确定最适合云计算资源池应用的硬件支撑方案。     

《丑小鸭》教学电子书制作

借助电子杂志软件Iebook,尝试将二年级语文课《丑小鸭》制作成教学电子书形式进行教学,以期促进课程教学效果。     

安钢SAP预留系统的开发与应用

本文简述了安钢信息化建设概况,介绍了安钢信息化建设中开发SAP预留系统的设计流程,阐述了预留系统实现的功能.     

浅谈计算机网络安全与防御技术

本文通过分析计算机网络安全的概念与现状,针对网络安全防御的关键技术及策略进行分析,以其通过本文的阐述为计算机网络安全体系建设提供技术支持.     

Polarization discrimination between repeater false-target and radar target

High fidelity repeater false-target badly affects a radar system’s detecting, tracking, and data processing. It is an available approach of confronting false-target for radar that discriminates firstly and then eliminates. Whereas for the technique progress about the repeater false-target jam, it is more and more difficult to discriminate this jam in the time-domain, frequency-domain, or space-domain. The technique using polarization information to discriminate the target and false-target is discussed in th...     

Word2000文档恢复技术

通过对Word2000文档文件删除后的磁盘结构及文档文件结构的分析研究．给出恢夏Word2000文档文件的技术过程。