多种基底上溅射沉积ZnO薄膜的结构

在玻璃基底踌地基底上用反应式直流磁控溅射法制备了ZnO薄膜。用AES和XRD对薄膜结构和组分进行测试，结果表明，五种基底上生长的ZnO薄膜在不同程度上都具有优良的纵向均匀性、明显的c轴择优取和向较高的结晶度，而硅基底上薄膜的结构普遍优于玻璃基底上沉积薄膜

Floating planar movement hovering mechanism

本发明涉及一种气浮装置，具体的说是一种气浮平面运动的悬停机构，用于模拟低摩擦条件下设备在气浮平台系统上的悬浮定位装置。所述悬停机构安装在可悬浮于气浮平台上的设备主机架上，悬停机构包括直线驱动机构、两套拉杆组件及两个摩擦头，其中两套拉杆组件分别铰接于直线驱动机构的两端，两个摩擦头分别安装在两套拉杆组件上，用于与气浮平台摩擦接触，直线驱动机构通过伸缩运动带动两侧拉杆组件运动，使悬停机构的高度改变，从而改变摩擦头与气浮平台之间的摩擦力。本发明对低摩擦环境仪器设备在实验和测量过程中的快速自主定位，不会影响原有气浮状态，并且在定位悬浮过程中不会对设备产生附加扰动力，也不会改变其原有姿态。</p

GaN蓝光材料新型ZnO/Si外延衬底的溅射沉积

采用常规磁控溅射方法，通过优化工艺，在Si(100),Si(111)多种基片上沉积ZnO薄膜。利用透射电镜(TEM)、X射线衍射(XRD)和X射线摇摆曲线(XRC)，对ZnO薄膜的微区形貌、结晶情况、C轴择优取向进行了详细的测试分析。结果表明，所制备的ZnO薄膜具有理想的结构特性，大多数样品测得ZnO(002)晶面XRC的半高宽(FWHM)1°左右，最小值达0.353°，优于目前国内外同类研究的最佳结果2°。并对ZnO/Si(100)与ZnO/Si(111)衬底的结果进行了比较和讨论

Study on trajectory planning for space simulator based on minimum acceleration limitation

Trajectory planning and simulation of docking tests on the ground for space simulator is one of key technologies to complete space docking mission. A new time-optimal trajectory planning algorithm is proposed based on minimum acceleration limitation. It is realized by searching maximum acceleration to obtain the best time according to PSO (particle swarm optimization). Through calling matlab script by LabView and capturing control set points, 3D CAD model is driven to verify the rationality of the trajectory planning algorithm and model design. The simulation results show that the simulator using the proposed algorithm can move smoothly and reliably meeting the experiment requirements. &copy; (2013) Trans Tech Publications, Switzerland

Twelve degree freedom flight simulator performance test device

本发明提供一种十二自由度航天模拟器对接性能试验装置，包括二维平动驱动单元、主动偏航驱动单元、被动偏航驱动单元、主动航天模拟器和被动航天模拟器；主、被动偏航驱动单元分别设置于二维平动驱动单元两端，主动航天模拟器设置于主动偏航驱动单元上，被动航天模拟器设置于被动偏航驱动单元上；主动偏航驱动单元带动主动航天模拟器，模拟对接机构的主动端；被动偏航驱动单元和被动航天模拟器，模拟对接机构的被动端；本发明航天模拟器各自由度之间运动耦合性小，各自由度实现灵敏、可靠，运动范围大，运动轨迹不受限制，采用气浮技术模拟精度高

Benthic foraminiferal assemblages in the western Arctic surface sediments and their paleoenrivonmental implications

通过对中国第1~4次北极考察在西北冰洋采集的表层沉积物中底栖有孔虫丰度及其优势种分布特征与环境因素关系的综合研究发现,楚科奇海区低的底栖有孔虫丰度主要受较高的陆源物质输入的稀释作用影响;楚科奇海台和阿尔法脊较高的底栖有孔虫丰度主要受到暖而咸的大西洋中层水的影响;受碳酸钙溶解作用影响的门捷列夫深海平原和加拿大海盆底栖有孔虫丰度较低,并且水深3 597M的站位出现了似瓷质壳的PyrgO WIllIAMSOnI和QuInQuElOCulInA OrIEnTAlIS,说明该区的CCd深度大于3 600M。根据底栖有孔虫7个优势属种的百分含量分布特征可以划分出5个区域组合:南楚科奇海陆架-白令海峡组合以优势种ElPHIdIuM EXCAVATuM和buCCEllA frIgIdA为特征,可能反映受白令海陆架水影响的浅水环境;阿拉斯加沿岸-波弗特海组合以优势种flOrIluS SCAPHuS和ElPHIdIuM AlbIuMbIlICATuM为特征,可能反映受季节性海冰融化,低盐的阿拉斯加沿岸流以及河流淡水输入的低盐环境;大西洋中层水组合以优势种CASSIdulInA lAEVIgATA为特征,可能反映高温高盐的大西洋中层水影响的环境;北极深层水组合以优势种CIbICIdES WuEllErSTOrfI为特征,可能反映水深大于1 500M低温高盐的北极深层水环境;门捷列夫深海平原组合以优势种OrIdOrSAlIS uMbOnATuS为特征,可能反映低营养的底层水环境。Benthic foraminiferal assemblages in 139 western Arctic surface sediment samples recovered during the CHINAREⅠ~Ⅳcruises were studied.The relative abundances of each species were calculated and according to the spatial distribution pattern of dominant species,benthic foraminiferal assemblages were divided to determine the relationship between the assemblage and environmental parameters.Our results show that the spatial distribution pattern of low benthic foraminiferal abundance in the Chukchi shelf area is controlled by high terrigenous matter input.In Chukchi Plateau and Alpha ridge,high benthic foraminiferal abundance is influenced by the warm and saline intermediate Atlantic water.In the Mendeleev Abyssal Plain and Canadian Basin,low benthic foraminiferal abundance is influenced by calcium carbonate dissolution and the appearance of porcelain-like species Pyrgo williamsoni and Quinqueloculina orientalis at 3 597 msites indicates the carbonate compensate depth(CCD)is greater than3 600m.Five assemblages related to spatial environmental factors can be determined by 7 dominant species:Southern Chukchi shelf-Bering Strait assemblage is dominantly characterized by Elphidium excavatumand Buccella frigida,representing the influence of shallow Bering Sea Shelf Water;Alaska Coast-Beaufort Sea assemblage is dominantly characterized by Florilus scaphus-Elphidium albiumbilicatum,indicating the low salinity environment due to seasonal sea ice melting and/or Alaska Coastal Current or riverine input;Atlantic Intermediate Water assemblage is dominated by Cassidulina laevigata,representing warm saline Atlantic Intermediate Water;Arctic Deep Water assemblage is dominated by Cibicides wuellerstorfi,reflecting the low temperature and high salinity environment greater than 1 500m;Mendeleev Abyssal Plain assemblage is dominated by Oridorsalis umbonatus,showing the oligotrophic bottom water environment.国家自然科学基金重点项目(41030859); 南北极环境综合考察与评估专项——2012年度北极海域海洋地质考察(CHINARE2012-03-02); 中国地质调查局项目(水[2012]01-011-05

在p-Si(100)上溅射法生长ZnO的结构和光学特性

室温下在p-Si(100)上采用直流反应磁控溅射法外延生长了ZnO薄膜。XRD测量表明了ZnO是高度c轴单一取向生长的，XRC测量则表明了ZnO的高质量。在室温下的PL测量中见到了带边发射，其强度与晶体质量有关

Accelerator Mass Spectrometry Measurement of --(53)Mn and Its Applications in Earth Sciences

宇宙成因核素53Mn是一种非常理想的地貌演变研究工具。近年来,随着加速器质谱(AMS)技术的不断发展,人们已能够进行53Mn的高灵敏测量。介绍了53Mn在地球科学中的应用前景、国际研究现状及中国原子能科学研究院目前正在开展的53Mn高灵敏AMS测量方法的研究。The determination of cosmogenic 53Mn concentrations found in terrestrial formations has many interesting applications for Earth Sciences.With Accelerator Mass Spectrometry(AMS) it should be possible to detect minute amounts of 53Mn.The situation of international research of 53Mn AMS measurement and applications are presented.The AMS measurement method of 53Mn at China Institute of Atomic Energy and its applications prospect are to be explored.国家自然科学基金资助项目(11075221);国家青年基金资助项目(10705054)---

大连极紫外相干光源

先进光源的发展在前沿科学研究中发挥的作用越来越重要。近十年来,飞速发展的自由电子激光技术为科学家们提供了探索未知世界、发现新科学规律和实现技术变革的重要工具。建成的大连极紫外(EUV)相干光源的运行波段为50~150nm,单脉冲能量大于100μJ,且可提供10-12 s和10-13 s量级的超快激光脉冲,是我国第一台自由电子激光用户装置,并且是国际上唯一运行在极紫外波段的自由电子激光用户装置,在世界范围内为用户提供具有高峰值亮度和超短脉冲的极紫外激光。大连EUV相干光源是由国家自然科学基金委资助、由中国科学院大连化学物理研究所和上海应用物理研究所共同承担的重大科学仪器研制项目,目标是打造一个以先进极紫外光源为核心、主要用于能源基础科学研究的光子科学平台