138 research outputs found

    Rational Interface Engineering of Metal and Oxide Heterojunction for Highly Efficient Photocatalyst

    No full text
    能源短缺和环境污染是当今人类社会面临的两大问题。光催化技术是一种将太阳能转化成化学能等可利用能量的有效途径,有可能解决当今社会面临的能源和环境两大问题。然而光催化剂的光生电子和空穴分离效率较低是光催化技术中急需解决的问题。为了解决这一问题,近年来的研究表明通过控制光催化纳米材料的特定晶面裸露可以提高其光催化活性,主要是因为在特定晶面裸露的光催化纳米晶体中,光生电子和空穴会在不同的晶面间发生自发的分离从而提高了光生电子和空穴分离的效率。另一方面,构筑异质结复合光催化材料,利用光生电子和空穴在形成的异质界面上的分离也是一种有效的途径。但是现有的异质界面大多是在光催化材料表面简单地沉积贵金属或者氧化...As a result of the rapid industrial development, the world-wide energy crisis and environmental deterioration are the two most critical problems challenging human life. Photocatalysis is one of the most effective fundamental processes to solve both problems by utilizing solar energy. The efficiency of the photocatalytic process is essentially limited by an ineffective separation of the photogenera...学位:理学博士院系专业:化学化工学院_无机化学学号:2052011015370

    Ternary Distillation Drying Process with Pore Protection and Its Applications

    Get PDF
    多孔材料应用广泛,其孔道特性对其应用过程中表现的性能具有很大影响。而在多孔材料的制备过程中,干燥方式对产品性能的影响极大,因而选择合适的干燥方法尤为重要。虽然工业上已经有超临界干燥、冷冻干燥、共沸蒸馏等护孔干燥方法,但仍然存在不同的问题。为此,本论文工作在共沸蒸馏的基础上,提出含有置换剂+改性剂+水的三组分蒸馏护孔干燥作为多孔材料干燥的一种方法,以SiO2等系列多孔材料的干燥为对象,系统研究所提出的干燥方法;进一步研究MgO多孔材料的干燥和应用,并与超临界干燥获取的产品进行比较。 以碳化法制备的二氧化硅浆料等系列多孔材料浆料为对象,探索三组分蒸馏护孔干燥的工艺条件。研究表明,三组分蒸馏护孔干...Porous materials are widely applicable, and the pore properties indeed affect their applications. Drying process in preparing porous materials is a key step for preserving the materials to a great extent on pores; so choice of an appropriate drying process is very important. Although there are some drying processes with pore protection in industry, such as, supercritical drying (SCD), freeze dryin...学位:工学硕士院系专业:化学化工学院_化学工程学号:2062014115139

    The translation and acceptance of Aono Suekichi’s literature theory in China

    Get PDF
    青野季吉是1920-1930年代日本极其活跃的无产阶级文艺理论家,他的理论曾被视为日本无产阶级文学运动“第二斗争期”的指导思想。他以“目的意识论”为核心的文艺思想在中国的革命文学发展时期对中国文坛产生过广泛而深远的影响。 本文通过梳理和归纳青野季吉文论著述在中国的译介与接受,综合采用文本细读、影响研究、比较研究等研究方法,力求清晰地勾勒出青野季吉文艺思想的理论来源及其知识构成,分析研究其文艺思想在中国的传播与接受状况。国内学者对青野季吉的研究并不多见,本人尝试在已有的有限研究成果的基础上,重新对青野季吉文艺思想在中国的译介和接受给予全面的探讨,以便对深入理解左翼文艺思想的知识构成及其所蕴含的...Aono Suekichi, whose theory was regarded as the guiding ideology of second fight in Japanese Proletarian Literature Movement, was an active proletarian literary theorist in Japan from 1920s to 1930s. His theory of objective and consciousness had extensively and profoundly influenced Chinese Literature during the developing period of Chinese Revolutionary Literature. On the basis of Aono Suekichi’...学位:文学硕士院系专业:人文学院_文艺学学号:1022011115224

    The Research of Processing Trade's Transformation and Upgrading

    Get PDF
    改革开放至今,我国加工贸易从无到有,不断发展壮大,为促进我国对外贸易以及整个经济社会发展做出了历史性贡献。现阶段我国加工贸易显现外资企业所占比重较大;主要经营模式是进料加工;地区发展不平衡,主要集中在东南沿海地区等特点,同时呈现加工贸易由劳动力密集型产品向技术密集型产品过渡趋势。加工贸易顺差过大,贸易摩擦日渐加剧;主体技术和加工制造档次仍处于低端;加工配套能力不强,产业增值率低;“飞地效应”明显;加工贸易内外部结构失衡;加工贸易监管存在问题。加工贸易发展中的这些问题需要通过转型升级来解决。 文章首先从比较优势理论和要素禀赋论、国际生产折衷理论、国际产业转移理论以及我国对于加工贸易的研究这四方...Since 1978, the processing trade has developed greatly and made great contribution to the development in our country. Foreign-funded enterprises have larger proportion of the processing trade enterprises in China. Feeding processing trade is the main business model. It’s out of balance of the processing trade among many areas actually. There is a big disparity between the east and the mid-west are...学位:经济学硕士院系专业:经济学院国际贸易系_国际贸易学学号:X200714501

    Investigation and Fabrication for All-Solid Thin Film Lithium-Ion Micro-Batteries Using SnOx Doped with Copper

    Get PDF
    随着MEMS技术的应用发展,微能源技术越来越受到人们的关注。全固态微型薄膜锂离子电池,有着体积小,安全性高,能量密度高,开路电压高,循环性能好,制备兼容性高等优势,成为目前微电源中的最佳选择。 正负电极和电解质都大大影响了整个电池的性能。本论文系统地探讨了全固态微型锂离子电池的活性材料薄膜的制备,并将实验结果集成到全固态微型锂离子电池的微加工技术中。 首先探讨了磁控溅射方法制备SnOx薄膜时金属铜的掺杂。随着铜掺杂量的增加,SnOx薄膜的充放电容量和循环性能有了很大的改善,但是由于铜的参与导致首圈不可逆损失增大,保证适当的铜掺杂量可以得到性能良好的负极SnOx薄膜。通过XRD和SEM发现,...With the development of MEMS technology, micro energy technology attracts more and more attention. Because micro-scaled all-solid-state thin-film lithium-ion batteries have a small volume, high security, high energy density, high open circuit voltage, good cycle performance, high preparation compatibility , they have became the best choice for micro power sources. Positive and negative electrodes...学位:工学硕士院系专业:物理与机电工程学院_测试计量技术及仪器学号:1992010115269

    Analysis and Design of the New Rural Endowment Information System

    Get PDF
    基本养老保险,是国家根据法律、法规的规定,强制建立和实施的一种社会保险制度。目前,我国农村由于人口老龄化、家庭的小型化等因素使农村传统的依赖土地和家庭养老保障功能大大弱化,农村老年人的基本生活保障问题面临极大挑战,建立农村社会养老保险制度,是我国应对人口老龄化、构建社会主义和谐社会的必然要求,是解决土地和家庭养老功能弱化的有效途径,是我国的一项最重要、涉及面最广的民生工程。随着改革开放的不断深入,农村养老保险体系的建立已成为时代的需求,改变传统的农村养老保险模式,按照个人缴费、集体补助、政府补贴相结合的方式建立筹资机制,通过计算参保缴费年限,让农民也能实现老有所养。由此需要建立功能强大的系统。...Basic endowment is a mandatory social insurance system established by national law and regulation. Currently, due to aging of population and the one child policy, the traditional means of endowment which rely on land and family have been greatly compromised. Basic life guarantee for senior citizens in rural areas is faced with crucial challenges. Theremore, a rural endowment system is necessary fo...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X200923046

    人性与伦理——《DottheI》影评

    Get PDF
    本文在法国电影《dOT THE I》的内容基础上,对影片中的角色及其性格特征进行了简析,同时,在纵观影片剧情全局的前提下,对影片情节设计取向中的伦理问题进行了探讨

    The Legislative Study on Private Equity Investment Fund

    Get PDF
    私募股权投资基金在推动经济发展、拓宽融资渠道、鼓励企业创新和加速产业升级等方面起着十分重要的作用。我国私募股权投资基金行业发展很快,在经济生活中逐步占据重要地位。但在发展进程中出现了大量新情况和新问题,至今未有一部完整的私募股权投资基金法律对其加以调整和规范。 本文第一章从私募股权投资基金的概念辨析入手,讨论其法律组织形式及发展私募股权投资基金的重要意义。第二章重点比较分析我国台湾地区和美国私募股权投资基金法律制度,尤其突出了对我国台湾地区立法经验的参考和借鉴,提出对我国私募股权投资基金立法的启示。第三章进而详细阐述我国私募股权投资基金的立法现状,深入剖析立法中存在的主要问题,提出我国私募股...Private Equity Fund in the promotion of economic development, broaden the financing channels and encourage enterprises to innovate and accelerate industrial upgrading and so plays an important role. Private Equity Investment Fund industry in China developed rapidly in the economic life gradually occupy an important position. However, in the development process emerged a large number of new situati...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:X200612001

    Analysis on Effect of VAT Reform in Financial Service Industry-- Basic on Market Power and Tax Shifting

    Get PDF
    自2012“营改增”在上海试点以来,“营改增”的范围逐年扩大,并预计在2015年底全面覆盖服务业。由于金融服务业的特殊性,近年来关于其“营改增”的讨论愈演愈烈。然而,现有研究几乎忽视了市场势力在其中的重要作用。我国银行具有较高的市场势力,并且市场势力对企业的税负转嫁起着关键性的作用,因此在研究“营改增”的政策效应时,将市场势力纳入考虑十分必要。 本文首先利用1999-2012年的上市与非上市银行的数据,对我国银行的市场势力进行了测量。然后根据上市银行的数据实证分析验证了市场势力在“营改增”的政策效应中所起到的重要作用,与此同时还分析了银行业务多元化对银行产出价格的影响。最后,本文借鉴代表性国...The scope of VAT Reform has been extended since it experiments in Shanghai. And as planned, Service Industry would be entirely included in VAT system at the end of 2015.Because of the specialty of financial service, research on the effect of the VAT Reform in financial industry has been more and more popular. However, an important factor was overlooked among almost all researches—the Market Power....学位:经济学硕士院系专业:经济学院_财政学学号:1552012115175

    Analysis on the Investment Projects of Qingdao LiFeng Electronics SMT

    Get PDF
    摘要 山东省是目前国内电子信息产业较为发达的省份,电子产品表面贴装(SMT)加工量大。而由于SMT生产设备昂贵、实时高效等特性决定了外包的比例非常高。山东SMT加工起步较晚,行业格局还处于零散、落后的阶段。目前除了海尔、海信、富士康、LG等这些大企业外,在山东拥有高质量SMT加工能力的企业还很少。目前青岛地区SMT产能仅能满足本地市场不足60%的需求,在本地SMT加工能力不足的情况下,海尔、海信等企业还需要依靠烟台、天津等周边城市的SMT企业提供代工服务。同时,相对于珠三角以及长三角地区,山东SMT代工产业尚处于发展起步阶段,产业竞争程度、行业平均利润率都明显好于珠三角及长三角地区,未来发展...Abstract Shandong province is a leading producer of electronic devices in China, which places high demand for Surface-mount Technology (SMT). Due to the costly equipments and efficient labor required for producing SMT devices, a large proportion of SMT production is outsourced. Given that Shandong is still in its infancy in terms of manufacturing SMT devices, it is short of an overall planning fo...学位:工商管理硕士院系专业:管理学院高级经理教育中心(EMBA项目)_高级管理人员工商管理硕士(EMBA)学号:X201015627
    corecore