检索结果-南通市图书馆

Journal of the Chinese Ceramic Society 2014年第1期1卷 78-92页

作者： CAI Weiwei LI Jing ZHANG Yunfeng XU Guodong ROHAN Rupesh sun yubao CHENG Hansong Department of Chemistry National University of Singapore Sustainable Energy Laboratory China University of Geosciences Wuhan

Recent research activities on single ion polymer electrolyte(SIPE) that provides a simple but important way to solve problems related to battery safety and lithium dendrite formation for lithium based battery applications were reviewed. Improvement in both ionic conduction property and battery performance has been achieved during the last two decades. The ionic conduction mechanisms to guide SIPE molecular structure design, membrane preparation and battery assembling have been more clarified. Prototypes with both gel and all-solid systems have been demonstrated with acceptable performance and stability. In addition, the future prospects for the development of SIPE materials in lithium battery applications were also described.

关键词： lithium batteries single ion polymer electrolyte current status future prospects

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于分层鲁棒主成分分析的运动目标检测

计算机辅助设计与图形学学报 2014年第4期26卷 537-544页

作者：仓园园孙玉宝刘青山南京信息工程大学信息与控制学院南京210044 南京理工大学江苏省光谱成像与智能感知重点实验室南京210094

针对鲁棒主成分分析(RPCA)模型未能有效地利用运动目标时空连续性先验,容易将背景中的动态细节误判为运动目标的问题,提出了基于分层RPCA的运动目标检测方法.第一层RPCA模型对下采样的低分辨视频进行快速分解,动态地估计可能的运动区域... 详细信息

针对鲁棒主成分分析(RPCA)模型未能有效地利用运动目标时空连续性先验,容易将背景中的动态细节误判为运动目标的问题,提出了基于分层RPCA的运动目标检测方法.第一层RPCA模型对下采样的低分辨视频进行快速分解,动态地估计可能的运动区域,并利用时空域3D全变差模型来去除稀疏成分中的非结构化的背景扰动,确定显著的运动目标区域,生成运动区域map;第二层构建加权的RPCA模型,根据估计的运动区域map对候选前景进行阈值加权,鲁棒地检测运动目标,得到清晰完整的前景.实验结果证明,该方法能够有效地处理复杂动态背景的运动目标检测.

关键词：运动目标检测加权鲁棒主成分分析模型 3D全变差模型

在线全文

学校读者我要写书评

暂无评论

核电厂海水泵房水下清淤机器人探索研究

中国核电 2023年第6期16卷 861-867页

作者：孙宇宝福建福清核电有限公司福建福清350318

海水泵房主要为核电机组安全可靠运行提供冷源。机组运行期间在海水泵房鼓网腔室等区域滋生的海生物和淤泥是威胁机组冷源安全的重要因素,目前福清核电海水泵房清淤工作采用人工方式,存在工作环境恶劣,作业风险高,工作效率低下,劳动强... 详细信息

海水泵房主要为核电机组安全可靠运行提供冷源。机组运行期间在海水泵房鼓网腔室等区域滋生的海生物和淤泥是威胁机组冷源安全的重要因素,目前福清核电海水泵房清淤工作采用人工方式,存在工作环境恶劣,作业风险高,工作效率低下,劳动强度大等问题。为提升水下清淤安全管理水平及工作效率,清淤机器人结合现场工作实际,采用智能化、自动化手段,开发了一种具备远程监控和控制功能的水下清淤机器人,该机器人硬件系统包含控制模块、动力模块及视觉模块,并通过软件系统实现通信传输、导航定位、远程控制等功能,实现了清淤过程的远程自动化操作,大大提高了清淤机器人的工作效率,降低了工业安全风险,从而保证海水泵房的稳定运行,提高机组冷源可靠性,在核电领域值得广泛应用和推广。

关键词：冷源安全海水泵房清淤机器人远程监控

在线全文

学校读者我要写书评

暂无评论

EPG 535光刻胶氧离子刻蚀工艺的研究

压电与声光 2011年第4期33卷 523-526页

作者：任洁傅莉孙玉宝査钢强西北工业大学凝固技术国家重点实验室陕西西安710072

采用反应离子刻蚀(RIE)技术,对EPG 535光刻胶和碲锌镉(CZT)基体刻蚀工艺进行研究,采用原子力显微镜(AFM)法测试CZT基体刻蚀前后的表面质量,探讨了EPG 535光刻胶刻蚀速率和CZT基体表面粗糙度的影响因素。结果表明,当RF功率为60 W、氧气... 详细信息

采用反应离子刻蚀(RIE)技术,对EPG 535光刻胶和碲锌镉(CZT)基体刻蚀工艺进行研究,采用原子力显微镜(AFM)法测试CZT基体刻蚀前后的表面质量,探讨了EPG 535光刻胶刻蚀速率和CZT基体表面粗糙度的影响因素。结果表明,当RF功率为60 W、氧气气压为1.30 Pa、氧气流量为40 cm3/min,光刻胶达到最大刻蚀速率;随着RF功率降低,刻蚀后CZT基体的表面粗糙度降低。实验优化的刻蚀参数为:RF功率40 W、氧气气压1.30 Pa、氧气流量40 cm3/min。

关键词：氧气反应离子刻蚀(RIE) EPG 535光刻胶碲锌镉晶片表面粗糙度刻蚀速率

在线全文

学校读者我要写书评

暂无评论

画家海日汗作品研究

中国蒙古学（蒙文） 2022年第3期50卷 61-67页

作者：孙玉宝不详

Divergent responses of runoff to climate change in the upper basins of the Third Pole dominated by westerlies and monsoon

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第8期67卷 2592-2614页

作者： Qikai sun Fengge SU He sun State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China

The diverse climates,distribution of snow and glaciers,and geographic locations directly affect the runoff response to climate change in the upper basins of the Third *** present,a comprehensive analysis of runoff variations and their distinct responses to climate change in the westerlies-and monsoon-dominated upper basins is still *** study comprehensively analyzed annual runoff variations in westerlies-dominated basins(the upper basins of the Aksu(UAKS),Syr Darya(USRD),Yarkant(UYK),Hotan(UHT),Amu Darya(UAMD),and Indus(UI))and monsoon-dominated basins(the upper basins of the Yangtze(UYA),Yellow(UYE),Lancang(ULC),Nujiang(UNJ),and Yarlung Zangbo(UYZ))of the Third Pole from 1961 *** multi-source meteorological data and large-scale circulation factors,this study investigated the divergent responses of runoff in the upper basins to climate change,and explored the large-scale circulation mechanisms underlying runoff variations in these upper *** results showed that:(1)The annual runoff in the majority of upper basins(except for the UYE and UYZ)exhibited an increasing trend,and the annual runoff in the UAKS,UYK,and UI showed a significant increasing trend from1961 to *** annual runoff in the upper basins of the Third Pole changed abruptly from decreasing to increasing between the 1980s and 2000s,with the exception of the UYE.(2)The runoff in the monsoon-dominated upper basins has been controlled primarily by changes in precipitation over the past 55 *** contrast,the runoff in the westerlies-dominated upper basins exhibited three distinct long-term responses to climate change:temperature-dominated(UYK and UHT),precipitation-dominated(USRD and UAMD),and the combined influence of precipitation and temperature(UAKS and UI).Since the 1960s,the sensitivity of runoff to warm season temperature changes in the most westerlies-dominated upper basins has decreased,while the response of runoff to precipitation changes has intensified.(3)The stud

关键词： Upper basins of the Third Pole Climate change Westerlies and monsoon Runoff variations Large-scale circulation factors

同方期刊数据库

New perspectives on deep carbon cycling

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第8期67卷 2411-2422页

作者： Weidong sun Center of Deep Sea Research Key Laboratory of Ocean Observation and ForecastingInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laoshan Laboratory Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

The proto-atmosphere serves as a crucial starting point for the carbon *** based on atmospheric data from Mars and Venus suggest that Earth's proto-atmosphere contained>110 bar of CO_(2)and>2.6 bar of *** protoatmosphere had over 1000 bar of water vapor during the magma ocean stage,assuming the proto-ocean had a volume of two oceans of *** this stage both water and carbon dioxide were in a supercritical state at the magma-atmosphere *** serpentinization reactions occurred due to rock-water interaction,producing abundant ***,nitrogen is reduced to ammonia,and carbon dioxide to methane,forming carbonate *** proto-atmosphere dominated by methane,ammonia,and hydrogen formed a significant amount of amino acids through *** process is essential not only to the origin of life,but also to the early carbon-nitrogen cycle on *** the Hadean eon,a large amount of CO_(2)was sequestered as carbonate and organic ***,it mainly entered the deep mantle through mantle overturn or *** the mantle transition zone,carbonate undergoes“Redox freezing”,where carbonate is reduced to diamond through oxidation of ferrous iron in the *** the lower mantle,Fe^(2+)undergoes disproportionation reactions,forming Fe^(3+)and metallic *** these,Fe^(3+)mainly resides in bridgmanite,thereby increasing the oxygen fugacity of the lower mantle,while metallic iron falls to the Earth's *** distribution of carbon in the mantle is crucial for deep carbon *** density curves of diamond and mantle peridotite melt intersect at the bottom of the mantle transition zone(about 660 km).This density crossover leads to the accumulation of diamond during the magma ocean *** materials such as subducting slabs enter the lower mantle,compensatory upwelling of lower mantle material *** enters the upper mantle,decomposes,releasing Fe^(3+)ions and oxidizes diamond

关键词： Carbon cycling Proto-atmosphere Amino acids Subduction initiation Passive margin subduction Atmospheric carbon dioxide

在线全文

学校读者我要写书评

暂无评论

关于某型履带车辆制动器的有限元分析与研究

新技术新工艺 2013年第7期 56-58页

作者：孙玉豹中海能源发展采油技术服务公司增产作业分公司天津300452

ABAQUS有限元软件是国际上最先进的大型通用有限元软件之一,它可以分析复杂的工程力学问题,不仅计算精度高,而且能适应各种复杂形状。本文利用ABAQUS有限元软件,对某履带车辆制动器进行分析研究。利用三维CAD建模软件Pro/E,创建某履带... 详细信息

ABAQUS有限元软件是国际上最先进的大型通用有限元软件之一,它可以分析复杂的工程力学问题,不仅计算精度高,而且能适应各种复杂形状。本文利用ABAQUS有限元软件,对某履带车辆制动器进行分析研究。利用三维CAD建模软件Pro/E,创建某履带车辆制动器模型,导入有限元分析软件进行有限元分析,提取了不同时刻制动瓦的应力云图及部分制动瓦中心节点处,以及应力最大值点处的应力随时间变化的关系曲线,分析了制动带接触界面的应力分布规律和制动带的最大位移,从而可以为制动器的设计改进奠定基础。

关键词：履带车辆制动器有限元分析

Fossil Equidae in the Linxia Basin with Biostratigraphic and Paleozoogeographic Significance

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2024年第1期98卷 1-9页

作者： sun Boyang Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China

The Linxia Basin is characterized by an abundance of Cenozoic sediments,that contain exceptionally rich fossil *** are abundant in the Linxia Basin,the fossil record of equids in this region including 16 species that represent 10 *** comparison to other classic late Cenozoic areas in China,the Linxia Basin stands out,because the fauna and chronological data accompanying Linxia equids render them remarkably useful for *** anchitheriines in the region,such as Anchitherium and Sinohippus,represent early equids that appeared in the late stages of the middle and late Miocene,*** the equines,most species of Chinese hipparions have been identified in the Linxia Basin and some species of the genera Hipparion and Hippotherium have FAD records for ***,Equus eisenmannae is one of the earliest known species of Equus in the Old World and is well-represented at the Longdan *** species with precise geohistorical distributions can serve as standards for high-resolution chronological units within this *** at the eastern margin of the Tibetan Plateau and subject to considerable uplift,the Linxia Basin has served as a biogeographic transition area for equids throughout the late Cenozoic.

关键词： Equidae Cenozoic biostratigraphy paleozoogeography Linxia Basin