Zr-Nb-Cu合金非晶化反应的热力学计算及离子束混合实验

利用超高真空镀膜法制备了Zr-Nb-Cu合金系统五个不同成分点多层膜样品,成分点分别为Zr63Nb19Cu18、Zr42Nb19Cu39、Zr41Nb39Cu20、Zr19Nb18Cu63和Zr14Nb70Cu16.对样品进行离子束混合实验及相关表征后发现,Zr-Nb-Cu合金系统能形成非晶态合金,但是Nb元素的加入并不利于非晶形成.Zr19Nb18Cu63和Zr41Nb39Cu20多层膜样品得到了非晶态和固溶体的双相结构,此类双相结构比单一非晶相结构具有更好的力学性能.     

基于手持式读写器的电子门锁实时管理系统

鉴于目前电子门锁管理中存在时效性差、工作量大、工作效率低下等问题,本文提出了一种基于RFID手持式读写器的电子门锁实时管理系统,该系统利用手持式读写器的便携性好、存储数据量大、卡片读写稳定、可视化操作方便等优点来提高电子门锁管理系统的实时性,将手持式读写器和传统的功能卡两种管理方式相结合,从而满足酒店、宾馆、写字楼、高校宿舍等场合电子门锁对提高管理时效性和工作效率的要求,使电子门锁的管理更加安全、便捷、高效。     

One-step dip-coating of uniform γ-Al2O3 layers on cordierite honeycombs and its environmental applications

Cordierite honeycomb with high loading and uniform coating of γ-Al₂O₃ was prepared by a facile one-step dip coating strategy. The γ-Al₂O₃ obtained loading, which was as high as 30%, could be calculated according to the different weight of bare and washcoated cordierite honeycomb. SEM micrographs showed that coarser surface and round channels were formed, demonstrating complete coverage of a γ-Al₂O₃ layer on cordierite. The coating thickness was 30 µm, corresponding very well to the theoretical value, indicating a homogeneous coating of γ-Al₂O₃. Besides, no crack was observed on the surface or the corner of the channel wall. The washcoat exhibited excellent adherence with no significant weight loss after 3 h ultrasonic treatment, attributing to the “nail-like” strong interaction between the support and the washcoat. The derived PdCl₂-CuCl₂ monolith catalyst showed excellent activity and stability for CO oxidation at room temperature in microreactor. The catalyst was also effective in pilot-scale test using the diesel exhaust as feed gas, presenting a great application prospect.     

窄馏分切割技术在清洁汽油生产工艺中的应用

采用旋转带蒸馏仪对国内某炼油厂预加氢后催化汽油进行窄馏分切割,分析各窄馏分硫和烯烃分布规律,为全馏分催化汽油分馏提供精确的切割方案。实验结果表明,通过将切割轻汽油总硫含量控制在指标要求上限,最大量将烯烃切入轻汽油中,降低重汽油烯烃含量,可减少在加氢脱硫过程中由于烯烃饱和导致的辛烷值损失。     

Research progress on location privacy-preserving techniques

While providing plenty of convenience for users in daily life, the increasingly popular location-based ser-vice(LBS) posed a serious threat to users' privacy. The research about privacy-preserving techniques for LBS is becoming a hot spot, and there are a large number of research results. First, background information of privacy protection for LBS was introduced, including application scenarios of LBS, the LBS framework, objects of privacy protection and system architectures of privacy protection. Second, adversary models and metrics for privacy protection in LBS was discussed. Third, four types of privacy-preserving techniques based on generalization and obfuscation for LBS were analyzed and summarized thoroughly. Finally, the potential research directions for privacy-preserving techniques for LBS in the future were shown.     

软化油对自粘聚合物改性沥青防水卷材性能的影响研究

研究了不同化学组成的软化油对自粘聚合物改性沥青防水卷材物理性能和老化性能的影响。结果表明,饱和分含量较高、芳香分含量相对较低的软化油有利于改善自粘聚合物改性沥青基材的高低温性能;芳香分、胶质和沥青质含量较高的软化油有利于提高自粘聚合物改性沥青基材剥离强度;饱和分含量较高的软化油制备的自粘聚合物改性沥青基材则具有更好的抗热老化和紫外老化性能。     

连续管测井机注入头液压系统的设计

注入头是连续油管测井机的核心部分,其液压系统采用目前先进的电液集成控制技术,实现模块化、集成化设计,提高连续油管测井机的自动化水平.根据连续管测井机注入头的主要功能和技术要求以及连续管测井作业的工艺特点,液压系统方案中,设计满足负载特性要求的主驱动回路和辅助驱动回路.在此基础上,应用自动控制技术,实现连续管测井机工作过程的自动化.实验结果表明:连续管测井机注入头液压系统工作可靠,是一种理想的连续管注入头液压系统.     

中国第1.5代生物燃料乙醇产业发展现状及展望

介绍了我国以非粮作物木薯和甜高粱为原料生产燃料乙醇的生产技术及产业发展现状,分析了当前产业发展存在的问题,指出加强在原料种收储方面的研究以及种植基地建设,实现原料的大规模廉价稳定供应,同时做好全产业链优化设计,提高项目整体经济性,这将有助于我国1.5代生物燃料乙醇产业发展,满足生物燃料的市场需求和国家既定目标。     

基于VBA的钻井井场计算工具的开发

电子报表虽然不是新事物,但深入应用却有着广阔的空间,尤其在钻井井场计算工具的开发和钻井工程报表的自动生成方面。文中论述了三种Excel应用层次——单元格计算、内置宏计算和VBA二次开发,并辅以实例加以说明,展示了不同场合下的计算解决方案,试图为井队基层的信息化提供一种易于掌握、便于推广的方式。     

旋转控制头台架试验研究

根据当前钻井施工对旋转控制头设备的性能要求及相关标准,进行了旋转控制头试验方案的设计。通过对密封压降、轴承和动密封件温度、驱动扭矩的监测,综合确定旋转控制头的工作性能。在此基础上,完成了试验数据采集程序的设计,据此进行旋转控制头采集数据的实时监测和存储,为旋转控制头的结构优化提供试验依据。同时可以根据本试验方案,完善我国旋转控制头设备的试验要求,提高设备准入标准,更加客观地评定旋转控制头的质量。