金属陶瓷倾斜涂层的热障作用

研究了在大气下用氧—乙炔火焰法实现的Al_2O_3基金属陶瓷倾斜涂层的附着性及其热障作用。结果表明,Cu、Ni/Al金属的加入及梯度成分设计,改善了涂层与基体之间的物理相容性和化学相容性,使热应力、界面应力弛豫,附着性明显提高。同时,该梯度涂层具有良好的抗热震、抗热冲蚀及抗高温铁水烧蚀等性能,热障作用显著。     

Nb约瑟夫森结中AlO_x阻挡层阳极氧化的研究

用阳极氧化电压谱图技术分析Ｎｂ／ＡｌＯｘ／Ｎｂ约瑟夫森结中ＡｌＯ２隧道阻挡层（绝缘层）与Ｎｂ电极之间的介面特征并测量谱图阻挡层阳极氧化的电压宽度，发现这种电压宽度与阻挡层厚度密切相关．通过阻挡层阳极氧化电压宽度Ｖｗ和沉积Ａｌ厚Ｄ的关系测量，证实Ａｌ上ＡｌＯｘ的生长只取决于氧化条件而与沉积的Ａｌ层厚度无关．本文还提出了一种由Ｖｗ估算Ａｌ上生长的ＡｌＯｘ厚度的方法．实验证明，阳极氧化电压谱图技术是监测约瑟夫森结的介面特性和临介电流密度的有用工具，对高温超导结及其超导器件的开发起着重要的作用．     

二次规划的内点算法

介绍了二次规划内点算法的一些最新研究成果，选择了几个有代表性的算法加以分析研究，从而对二次规划的内点算法做出了一个整体概述。     

低温等离子体协同CuO/海泡石催化脱除NO

采用硝酸浸泡和硝酸铜改性海泡石并经高温煅烧,制得改性海泡石催化剂协同介质阻挡放电反应器产生的低温等离子体脱除NO。通过XRD分析发现海泡石原矿经硝酸洗涤可有效去除其中Mg以及其他以不同化合物形态出现的杂质,海泡石原矿经酸洗提纯、浸渍硝酸铜溶液、干燥、煅烧等工艺过程处理可在载体表面形成稳定的CuO物相,并且海泡石基本结构没有发生明显变化,证明海泡石结构稳定,是良好的催化剂载体。通过SEM测定表明酸洗可有效增加海泡石孔道截面和孔道数,增大其比表面积;并且活性组分均匀分布在催化剂表面及孔道中,在负载量适中时未发现较大聚集颗粒。证明改性海泡石催化剂协同低温等离子体对NO具有良好的脱除效果。     

组织信息交流障碍及其信息结构的构建

在组织内部的信息交流中,许多信息交流问题并不会因为信息系统的建设而得到改善,只有建设完善的信息结构,才能使组织的信息交流更为科学、快捷和高效。     

Coastal plain evolution in southern Hainan Island, China

The coast of southern Hainan Island is characterized by wide sandy embayments, which consist of ( i) drowned valleys bounded by steep bedrock hills and only locally receiving sediments, and embayments of various dimensions covered either by (ii) alluvial-deltaic deposits or by (iii) sands of coastal beach ridges/barriers and associated elongated lagoons. During the late Tertiary-Pleistocene the area has experienced isostatic and eustatic movements associated with neotectonics and climatic changes. Such history isrecorded in terraces at various altitudes (SO, 40, 20 m asl) and sequences of coastal sand ridges/baymouth bars. The Holocene variations in sea level and climate are recorded in the dated coastal ridges, coral reef and beachrock. Conditions suitable for reef development started about 8000 a BP. The GPR profiles also show that the internal structures of the sand ridges have composite nature being formed by several superimposed secondary ridges.     

关注手语电视新闻 共促社会和谐发展

手语电视新闻日益受到人们的关注。随着社会文明进程的加快,越来越多的电视台开设了手语新闻栏目,旨在为聋人群体服务,但目前手语电视新闻存在聋人看不懂、不愿看的尴尬局面。分析了目前手语电视新闻存在的问题并探讨了改进措施,希望实现真正意义上的无障碍沟通环境,促进社会和谐发展。     

农村中小学英语教师教学反思状况调查

教学反思对于教师专业成长具有重要价值。“国培计划项目”学员是具有一定教学实践经验的教师，通过问卷调查的方式，可以对农村中小学英语教师反思观、反思方式、反思内容、反思障碍和对反思作用进行连接，促使其对加强教学反思意识，提高反思能力。     

Space Flight, Astronautics and Light Barrier

Amazing achievements and accomplishments of space science and technologies in the past half-century, have profoundly affected all disciplines of natural science and engineering. By the end of 20 th Century, man or man-made spacecrafts landed, or approached and surveyed all planets of solar system and their moons except Pluto. Biologists believe that life may emerge and evolve wherever liquid water exists. No liquid water is ever found yet on all planets and their moons in Solar System except for our Earth. Our mother planet turned out to be the only life-supporting oasis within 4 light years of the Milky Way. It is suggested in this article that time has come for science and engineering communities to study and prepare interstellar flight of manned or unmanned spacecrafts beyond Solar System. Four issues are to be addressed as prerequisite for such flight, namely, detailed survey of nearby space beyond Solar System, design of nuclear fusion rocket engine, long-sustainable on-board life-supporting system and breakthrough of the light barrier.     

基于SHEL模式的降低风险研究(英文)

利用SHEL模式以人为因素为中心,分析软件、硬件、环境、人员,以及他们之间的联系.结合案例探讨SHEL模式的优缺点,及其在实践中对减低风险的意义.