2,234 research outputs found

    Tip Enhanced Dark-field microscopy

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    表面等离激元(SurfacePlasmonPolaritons,SPPs)是一种由金属表面的自由电子与外界光子相互作用形成的表面电磁振荡模式。在空间上具有高度的局域性,可以突破衍射极限,实现亚波长尺度范围内光的传导与控制。同时也是金属表面电磁场增强的重要来源。理论与实验研究表明,当两个表面等离激元靠得很近时,会产生耦合作用,近场电磁场会重新排布,并在合适的距离范围内产生“热点”。表面等离激元之间的耦合有多种形式:纳米粒子之间耦合LSP-LSP,纳米粒子与金属薄膜之间的耦合LSP-SPP,以及纳米粒子阵列与金属薄膜之间的耦合LSP-LSP-SPP等。它们之间的耦合程度与等离激元之间的距离d有关,...Surface plasmons are highly versatile electromagnetic modes that occur at optical wavelengths at the surface of metallic structures, due to the interaction between incident photons and the conduction electrons within the metal. This electromagnetic field is highly localized at the nanoparticle surface, which is strongly enhanced, and decays rapidly away from the surface/dieletric interface into th...学位:博士后院系专业:化学化工学院_物理化学学号:201117004

    CD24+SSEA4+ヒト卵巣癌細胞は癌幹細胞の性質を持つ

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    富山大学・富医薬博甲第147号・王芳・2014/09/26・★論文非公開★富山大

    苏联对德国V-2火箭的技术复原(1945—1947)

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    在概述德国V-2火箭研制历程的基础上,考察了苏联人通过与德国专家合作,修复德国已有的火箭工厂和技术资料,复原V-2火箭的设计制造,逐步掌握火箭整体、发动机和控制系统的设计、制造、组装、测试与发射准备等技术,并最终在苏联本土实现火箭成功发射的过程。笔者认为,苏联采取在德国就地复原德国火箭技术的做法是非常明智的。苏联人最大限度地利用了德国的人才、技术与工业基础,实现了火箭技术的全面复原,不仅包括有形的火箭产品,还包括无形的技术知识。V-2火箭技术复原工作的成功显著提升了苏联火箭技术的起点,为以后的发展奠定了各方面的坚实基础

    苏联对纳粹德国火箭技术的争夺(1944~1945)

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    第二次世界大战末期,苏联先后夺取纳粹德国设置在波兰和本土的火箭基地,部分地分享到德国的火箭产品、仪器、设备设施、资料和技术专家等,掌握了一些关键核心技术,进而筹划仿制V-2火箭。这次技术转移提高了苏联的技术起点,缩短了苏联研发火箭武器的时间,为后来的技术创新打下了基础。经对俄文档案、回忆录及其他文献的研读,本文初步梳理苏联争夺德国弹道导弹技术的历程,以深入理解苏联火箭事业建立的技术基础和历史与境

    2 制度视角下的中印OFDI比较分析

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    Design and Implementation of Express Management System Based on C/S

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    现代化信息技术水平的不断提升,使得人工操作和快递企业发展之间存在的矛盾越来越突出。良好的技术发展为快递企业等需要高科技技术作支撑的产业提供了广阔的管理平台。当然,这些拥有快捷,高效优点的技术使得快递企业的工作负担大大的减轻了。 快递管理系统是在开发平台、数据库和计算机网络上,设计的实用系统。该系统能为快递企业提供丰富全面的信息。通过该系统,合理的整合资源,提高人员管理效率,已达到最快速的货物配送。此次论文主要对系统的功能和结构进行分析,强调了非功能性要求的重要性,并对其设计和实现进行了探讨,最后对此系统进行实现和部分功能效果的展示。对快递管理系统的开发过程中的各种事项和模块进行了详尽的研究,...With the acceleration of information technology and improve the level of the socialization process, the contradiction between the traditional manual and express enterprise development is becoming more and more prominent. Provide technical support for the popularization of computer technology and other high-tech industry provides a good management platform for enterprise. At the same time, fast, ef...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323030

    近25 a 银川市城市化进程中热力景观格局演变分析

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    Abstract: Based on the Landsat images and statistical data,in this paper the urbanization process and thermal landscape dynamics of Yinchuan City were analyzed. The objectives of this study were as follows: ① To analyze the spatial and dynamic characteristics of urban thermal landscapes based on the landscape pattern index; ② To assess the influence of the urbanization process on the thermal landscapes; ③ To understand the relationship between the land use pattern and the land surface temperature ( LST) based on the distribution index. The results showed that there was a significant heat-island effect in Yinchuan City,and the high temperature area was consistent with the built-up area and the unused land. LST declined from the downtown to the suburbs,and an obvious difference of the dynamic characters of the thermal landscapes could be identified at the different stages of urbanization. LST for various land use had obvious discrepancies,the mean LST for the land use types was in a descending order of unused land,construction land,green land and water body. Different land use types had different thermal distribution at different stages of urbanization. The land use pattern influenced the urban thermal environment,especially the spatial distribution of green land and unused land affected LST more significantly

    Study on preparation of VIP nanoparticles and its protection on the cell model of Parkinson’s disease

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    帕金森病是继老年痴呆症之后世界第二大威胁人类健康的神经退行性疾病,已经严重影响1~2%老年人口的生活质量。随着生物医学技术的迅速发展,目前已经发现许多对中枢疾病(如帕金森病、老年痴呆症)具有治疗活性的多肽和蛋白类药物。但血脑屏障的存在,很大程度上限制了这些药物的临床给药和治疗作用的发挥。因此,研究多肽和蛋白类药物的新型给药系统,具有很大的研究价值和社会意义。 血管活性肠肽(Vasoactiveintestinalpolypeptide,VIP)是具有重要调节作用的神经多肽,它对帕金森病和老年痴呆症的防治都有较好的作用。但是血管活性肠肽在体内的半衰期较短,稳定性差,不易透过血脑屏障,因此和其他...Parkinson’s disease (PD) is the second most common neurodegenerative disorder, after Alzheimer’s disease. It has affected about 1 ~ 2 % of the population over the age of 60 years seriously. The development of Biomedical Technology has contributed to the discoveries of peptides and proteins with considerable potential in the treatment of central nervous system (CNS) diseases (such as Parkinson’s di...学位:理学硕士院系专业:药学院_药理学学号:2452009115303

    The Tenure of Office and Regional Economy Growth —Based on Provincial Panel Data of China from1990 to 2014

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    针对改革开放以来我国在经济上取得的显著成就,许多文献从技术、物质资本、开放政策、外商投资、基础设施等角度对我国的经济增长进行探索。不可忽视的是,由于我国中央集权与地方分权的政治体制,我国的地方官员在促进辖区经济增长中扮演着重要的角色。国内外已有学者对我国省级官员与辖区经济之间的关系进行研究,大部分文献集中于从晋升激励的角度对官员促进辖区经济增长的动力来入手,且使用的方法大同小异。本文基于1990年以来各省经济环境的区别,关注省级官员的异质性,利用1990年至2014年我国省级数据对省级官员与辖区经济增长的关系进行实证检验。由于官员对经济增长的影响需要一个传导机制,官员对经济增长的影响不会有一个...Since the reform and opening up, China has made remarkable achievements in economy, according to many economic literatures, a lot of scholars explore the growing of Chinese economic from many angle, such as technology, open policies, foreign investment and so on. Since Chinese political system is made up of centralization and decentralization, local officials play an important role in promoting ec...学位:经济学硕士院系专业:经济学院_政治经济学学号:1532014115212
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