氮氧化物气体污染物的控制和测定

本文主要叙述了各个领域对氮氧化物污染的控制以及相应的政策和法规。氮氧化物常用的检测分析方法,分析各个方法的检测原理、在实际使用中的优点和缺点以及使用注意事项。     

Determination of Plutonium Isotope Ratio of PuO2 Particles by Secondary Ion Mass Spectrometry

The isotope ratio of plutonium in plutonium-bearing particles is essential information for identifying its origin. This is meaningful for nuclear safeguards and nuclear forensic. Plutonium isotope ratio ^239pu^240pu in plutonium dioxide particle was determined precisely by secondary ion mass spectrometry （SIMS） in this study.     

长达100米的第二代高温超导导线面世

据媒体报导，最近美国有3家公司宣布他们开发出了几种新技术，已将钇、钡、铜和氧(YBCO)第二代超导导线制成100m长。而几年前，最好的企业也只能制成1m长的第二代超导导线。更令人惊奇的是，有些第二代超导导线能承载第一代超导导线那样高的电流。研究人员已将较短超导导线的承载电流能力提高到1400A。他们开发出的导线制造技术，可望使第二代超导导线的成本，     

周济：要大力加强高校科技产业的规范化制度化建设

据悉，教育部部长周济不久前在全国高校利技产业工作会议上指出，作为高校科技成果转化和产业化的一种重要途径，不少高校创办和发展了一批科技企业，形成了独具中国特色的高校科技产业。从2000年至2004年，全国高校科技企业累计实现销售收入2829.80亿元，创造了166亿元的利润，向国家纳税132.68亿元，上缴学校39.84亿元，为国家经济建设和高等学校的发展作出了重要贡献。     

PHILIPS 87C552单片机在电冰箱模糊控制器中的应用

介绍了８７Ｃ５５２单片机控制的电冰箱模糊控制器系统的组成以及软件，硬件设计。该系统具有功能强，性能可靠等优点，尤其在故障诊断，抗干扰方面采取了有效措施。     

Ti(C,N)基金属陶瓷熔渗/氮化复合表面处理

对Ti(C,N)基金属陶瓷进行了高温高压熔渗/氮化复合表面处理,通过扫描电镜、能谱仪、X射线衍射等分析技术对其显微组织、成分及结构进行了分析,并对其处理前后的硬度进行了测试分析.结果表明,经过表面处理,Ti(C,N)基金属陶瓷表面形成了富含Ti和N的硬化层,主要为Ti(C0.3N0.7),次表层富含Fe和Ni,其硬度自表面向心部呈现高-低-较高的变化趋势.     

Experiment research on grain drying process in the heat pump assisted fluidized beds

A heat pump assisted fluidized bed grain drying experimental system was developed. Based on this system, a serial of experiments was performed under four kinds of air cycle conditions. According to the experimental analysis, an appropriate drying medium-air cycle for the heat pump assisted fluidized bed drying equipment was decided, which is different from the commonly used heat pump assisted drying system. The experimental results concerning the drying operation performance of the new system show that the averaged coefficient of performance (COP) can reach more than 2.5. The economical evaluation was performed and the power consumption for removing a kilogram water from grains was about 0.485 kW·2222h/kg (H2O), which shows its reasonable commercial efficiency and great application potentiality in future market.     

秋水仙碱的微分脉冲极谱行为及测定

本文用微分脉冲极谱法研究了秋水仙碱在不同介质和PH值等条件下的电化学行为.找到了以0.6%的四丁基氯化铵为支持电解质,在PH1.81的B.R.缓冲溶液中进行微分脉冲极谱法测定的最佳体系,检出限为6.0×10~(-7)mol/L,峰电流线性范围为9.6×10~(-7)~8.6×10~(-5)mol/L.初步探讨了电极反应机理.应用于秋水仙碱片剂和山慈菇等实际样品分析,可不经分离直接测定,方法简便迅速,测定结果与经典的方法基本一致.     

Fabrication and Applications of Multi-Fluidic Electrospinning Multi-Structure Hollow and Core–Shell NanofibersOA

Recently, electrospinning(ESP) has been widely used as a synthetic technology to prepare nanofibers with unique properties from various raw materials. The applications of functionalized nanofibers have gradually developed into one of the most exciting topics in the field of materials science. In this review,we focus on the preparation of multi-structure fibrous nanomaterials by means of multi-fluidic ESP and review the applications of multi-structure nanofibers in energy, catalysis, and biology....     

Introduction of a New Method for Regulating Laves Phases in Inconel 718 Superalloy during a Laser-Repairing ProcessOA

The morphology, size, and distribution of Laves phases have important influences on the mechanical properties of laser-repaired Inconel 718(IN718) superalloy. Due to the deterioration of the substrate zone, the Laves phase in the laser cladding zone of IN718 superalloy cannot be optimized by a hightemperature solution treatment. In this study, an in situ laser heat-treatment method was proposed to regulate the morphology and size of the Laves phase in the laser cladding zone of IN718 superalloy ...