废氧化铝催化剂制高纯超细氧化铝

以废弃的氧化铝催化剂为原料，优化生产工艺，制备高纯硫酸铝铵，经热分解制备高纯超细氧化铝，利用X-射线衍射技术、扫描电镜等对产品结构进行表征，产品化学纯度高，粉体中心粒径在0.1～0.3um，与ZV-AO-21及同类法国进口粉料相当。     

Growth of single-crystal W whiskers during humid H2/N2 reduction of Ni, Fe–Ni, and Co–Ni doped tungsten oxide

Numbers of W whiskers were obtained by reducing Ni, Ni–Fe, and Ni–Co doped tungsten oxide in a mixed atmosphere of humid H₂ and N₂. The phases and morphologies of the reduction products were characterized by XRD and SEM. Intensive TEM and EDS analyses showed that the obtained whiskers were W single crystals which typical have alloyed particles (Ni–W, Fe–Ni, or Co–Ni–W) at the growth tips. The formed W whiskers were presumed to be induced by the alloyed particles. Our experimental results revealed that, during the reduction process of tungsten oxide, the pre-reduced Ni, Fe–Ni, or Co–Ni particles not only served as nucleation aids for the initial growth of W phase from W oxide but also played the roles of catalysts during the reductive decomposition of gaseous WO₂(OH)₂.     

项目管理在历史遗留房屋权属确认中的应用

大庆油田有限责任公司在房屋确权工作中采用了科学的管理办法,在历时不到两年的时间里,完成了历史遗留房屋权属确认工作,为企业依法维权、规范运作提供了保障,创造了条件.     

北部湾盆地油气层识别图版的建立与应用

基于气体图解法原理,根据气测值烃组分C1、C2、C3之间的相互关系,在对40余口井的气测录井资料进行统计分析的基础上,建立了北部湾盆地油气层识别图版。应用实例表明,北部湾盆地油气层识别图版具有较强的实用性,利用该图版进行油气层判别准确率达到98%以上,可为油气勘探开发随钻分析提供快速、准确的第一手资料。     

输配电网络规划优化方法的研究进展

对输配电网络规划的研究简况作了介绍,重点分析和总结了输配电网络规划优化的数学优化方法及其遗传算法、蚁群算法、Tabu搜索法等启发式算法的研究现状、存在问题,并分析了今后的研究方向,指出今后应研究输配电网络规划优化的特点.确定启发式算法的寻优模型和参数,保证算法的搜索方向,提高算法搜索效率,以获得输配电网络的全局最优解.     

按行程速比系数设计平面曲柄滑块机构的解析法

利用平面曲柄滑块机构中各有关点的坐标之间的关系，提出了一种按行程速比系数设计平面曲柄滑块机构的解析法。与现有解析法相比，该方法解题原理简单明了，计算简便，易于被工程设计人员所接受，具有较好的实用价值。     

低功耗智能热能表的设计

低功耗系统以其高可靠性，低电磁污染，使用和携带方便而成为现代电子的普遍追求，通过低功耗智能热能表的研制过程介绍，阐述了MCU最小功耗系统的硬件，软件设计原则，并介绍了一种低工作频率下的软件设计技巧。     

温差自力式调节阀在高炉上的应用

针对高炉恒流量供水冷却方式的弊端 ,提出采用温差自力式调节阀使高炉按恒温差供水冷却方式冷却。实验结果表明冷却壁进出水温差变小且保持稳定 ,同时大量节省高炉用水。     

气体钻井钻柱失效机理分析

川东北地区气体钻井申钻柱失效情况的统计资料表明,钻柱失效主要表现为磨损和断裂,分析可知,气体钻井时钻柱失效严重除与高速岩屑的冲蚀,井壁岩石的磨损、酸性介质环境的腐蚀有关外,还与钻拄承受更为复杂的动态应力密切相关.动力学分析结果表明,与钻井液钻井相比,气体钻井时钻柱的动态明显增大,动态应力的变化幅度和变化频率也明显提高,这是造成钻柱失效的主要原因之一.因此,防治气体钻井钻柱失效应切实重視钻柱动态应力的控制,目前条件下,加强钻柱的探伤工作,确保入井钻柱的抗疲劳破坏能力和使用减振工具是较为有效的预防钻柱失效的技术措施.     

Comparison between Y-doped ceria and Ho-doped ceria: Electrical conduction and microstructures

The electrical conduction and microstructure in Y-doped ceria and Ho-doped ceria were investigated. Visible differences between the two doped ceria were observed. The plots of conductivity of Y-doped ceria are well fit to the Arrhenius behavior, while curvature and kinks were observed on the plots of Ho-doped ceria. Such deviation from the Arrhenius behavior could be related to the existence of precipitates in Ho-doped ceria. It indicates that the electrolytic conductivity of doped ceria could be significantly influenced by microstructure features.