对世界核心期刊中北极研究文献的定量分析

对SCI数据库1997年至今的有关北极的研究论文中作者、来源期刊、国家、引文量、研究机构以及主题等进行了定量分析。     

全内反射型电调开关的串音特性分析

本文着重分析了影响全内反射型开关串音特性改善的几个因素。当开关效率较高时，势垒穿透、波束展宽和波导间耦合可能成为影响串音特性的主要因素．它们取决于波长和波导尺寸。文中也给出了几组曲线，适用于全内反射型开关的设计。     

Low Temperature Dyeing and Shrinkage-Resistance Finishing of Wool by Composition of Salt-Ammonia and Enzyme Treatment

Wool top and knitted fabric were treated with ammonia in the presence of sodium chloride （salt-ammonia process）. The effectiveness of salt-ammonia process traditionally used as pretreatment for low temperature dyeing has been investigated for conferring shrink-resistance of wool. The pretreatmont of salt-ammonia process followed by enzymatic treatment has been proved that contribute to not only the enhancement of dyeing behavionr but also shrinkage-resistance in the present studies. A novel composition of salt-ammonia pretreatment, oxidized and reduced treatment as well as protease modification was recommended to achieve low temperature dyeing and shrinkage-resistance of wool. At the same time, the process conditions were optimized by orthogonal array and assessed by dye uptake rate, weight loss and area shrinkage. Laboratory experiments showed that the knitted fabric treated according to optimized conditions of the combined process, achieved not only improvement of dye abilities but also the strict requirement of machine-washable, representing a possible alternative to chlorination.     

Fe50Cu50合金的制备及其表征

采用机械合金化方法制备了FexCul00-x合金，对样品进行了X射线衍射分析.结果表明，对于FexCul00-x合金，当z≤60时，为面心立方结构．当x≥70时，为体心立方结构．     

锰镍复合氧化物半导体纳米陶瓷的微观结构和电性能研究

对用溶胶一凝胶(SOL—GEL)工艺制备出的纳米粉末进行加压、烧结处理,制成NiO/Mn_3O_4.复合氧化物半导体纳米陶瓷试样,通过XRD、SEM、复阻抗和电导特性对复合氧化物样品的结构和电性能进行分析研究,结果表明纳米陶瓷电学特性与其显微结构有着十分密切关系.     

UHF战术卫星通信中的无源互调

本文闸述了UHF卫星通信系统射频信道中无源器件与电路非线性形成的机理,讨论了在多载波工作时由此而产生的互调对卫星通信的影响,并提出了解决途径及应注意的问题。     

陕北刺黄柏有效成分的提取与鉴定

陕北刺黄柏，又名小黄柏、三颗针，它是小蘖科小蘖属植物毛叶小蘖ＢｅｒｂｅｒｉｓｂｒａｃｈｙｐｏｄａＭａｘｉｍ）。我们从其干燥的根中提取出盐酸小蘖科（ＢｅｒｂｅｒｉｎｅＨｙｄｒｏｃｈｌｏｒｉｄｅ），并进行了化学鉴定与红外、紫外光谱鉴定。     

电涡流比拟自动测试系统的研究

介绍了以微电脑为中心的电涡流比拟自动测试系统的设计原理,所研制的系统可自动测量自由扭转杆的全场应力和抗扭刚度。     

一类曲线的存在性问题

给出抛物线的一个特征。