928 research outputs found

    The study of electrochemical glucose sensor with high performance

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    葡萄糖浓度的定量分析无论是对临床诊断,还是生态工程等众多领域均有至关重要的意义。尤其在临床方面,糖尿病已成为当今社会仅次于癌症和心脑血管疾病的第三大多发性疾病,特别的是由其可引出多种危害较大的并发症。每年糖尿病患者的数目都在不断增加,尤其是我国的糖尿病患者增速不可忽视。尽管没有完全治愈的方法,但是患者通过实时检测葡萄糖浓度可以有效避免并发症的发生。因此,开展快速精确实时地检测葡萄糖浓度的研究十分迫切。 电化学葡萄糖传感器凭借其特有的优势在众多检测技术中倍受青睐,但是无论是已商业化的酶传感器还是研究很热的无酶传感器,都有着各自的应用缺陷,综合性能都有不尽如人意的地方。对于经典酶传感器来说,易受...Quantificational glucose detection is very important not only to clinical diagnosis but also to other various ecological fields. Worldwide, diabetes has become the third multiple diseases behind cardiovascular diseases and cancer, which also leads to serious complications. The number of diabetes is growing from year to year, especially in our country, the growth rate has not been ignored. There is...学位:工学博士院系专业:萨本栋微米纳米科学技术研究院_微电子学与固体电子学学号:3352013015409

    Activation and Conversion of Small Molecules on Co(0001) and Preparation, Characterization of TiOx/Ni(111) Model Catalyst

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    大多数固体催化剂中由三部分组成:活性组分、载体和助剂,共同作用影响催化剂的活性以及选择性。但往往存在结构复杂、不均一等特点,难以深入理解其催化剂作用机理。模型催化剂可以通过选择组成简单、结构规整的表面,从分子水平研究催化剂的构效关系。在超高真空体系下,通过高分辨电子能量损失谱(HREELS)、俄歇电子能谱(AES)、和低能电子衍射(LEED)等表面敏感的表征手段,对表面吸附、氧化物的结构及生长方式进行详细的考察,研究小分子与表面的作用机制以及金属载体之间的强相互作用(SMSI)。 一、室温下,O2在Co(0001)表面解离成原子氧,表面存在两种氧物种:化学吸附氧及不稳定的近表面区域氧物种。升...Most heterogeneous catalysts are composed of three parts: active components, supports and/or promoters. Catalytic activities and selectivities are affected by their interactions. Since a detailed investigation of catalytic processes is often hampered by complex structures of industrial catalysts, the real catalyst is not an object for the study of catalytic reaction mechanisms. Model catalyst with...学位:理学硕士院系专业:化学化工学院_物理化学学号:2052013115163

    Tensor Model of Complex Correlated Data and Application Research

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    在许多研究领域,数据呈现出多模态的结构特性,张量可以清晰完整地表示这类数据。而张量数据的向量化处理丢失了大量的数据结构信息,甚至造成维数灾和过拟合现象。张量分析的方法直接输入张量数据,能够有效保持数据的结构信息;此外,以张量数据为基础的模型和算法,在减少参变量数目的同时,缓解向量方法在模型学习时极易出现的过拟合现象,这意味着张量模型处理高维小样本问题更加有效,为分析高维向量数据提供了一种新的思路。 基于张量的数据分析方法具有更加广泛的应用前景,所以本文探讨两类复杂关联数据的张量模型及其应用,一类具有天然的张量结构,一类可以转化为张量进行处理。本文的研究内容主要包括以下几个方面: 1.对象...In many areas of research, data presents multimodal structure property, this type of data can be expressed clearly and completely by tensor. Vectorization of tensor data lose many data structure information, even result in curse of dimensionality and over-fitting. While tensor analysis methods enter tensor data directly, keeping data structure information effectively; models and algorithms based o...学位:经济学硕士院系专业:经济学院_统计学学号:1542014115200

    Design and Implementation of Traffic Accident Information System for Kunming City

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    进入21世纪,我国经济快速增长,车流、人流、物流均大幅度增长,道路供需矛盾日趋突出,市政道路建设、规划建设相对滞后,交通流量组织不够科学,路网布局不尽合理,广大交通参与者交通安全意识普遍不高,重、特大事故不断发生,全国每年都有约10万余人死于道路交通事故。交通事故处理作为公安交通管理部门的一项专有职责,对于化解因交通事故所引发的社会矛盾,深入推动和谐交通建设具有举足轻重的意义。因此,交通事故处理信息系统可以帮助公安交通部门管理交通事故信息,是与群众联系的窗口。 本文针对现有的昆明市交通事故处理系统功能不够完善、体系封闭、储存结构不合理、资源浪费等问题,设计了一套交通事故信息系统。系统采用J2...Entering the 21st century, with rapid economic growth, traffic, people and logistics are also growing. The conflict between road supply and demand becomes more prominent and the planning and construction of municipal road construction is not well enough. Traffic flow is not enough scientific organization, the layout of the road network is not reasonable, the awareness of road safety in general is ...学位:工程硕士院系专业:软件学院_软件工程学号:X201323126

    Epitaxial growth of non-polar ZnO films and the related nitrogen-doping studies

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    近几十年来,宽禁带化合物半导体ZnO材料由于其自身拥有的诸多优点而越来越受到研究者的重视,然而其p型材料制备的困难依然是制约其在光电器件方面大力发展的瓶颈。本论文的主要研究思想在于从ZnO的结构方面寻求p型掺杂研究的突破。主要是利用分子束外延(MBE)的技术分别在ZnO(10-10)和MgO(100)两种衬底上分别同质和异质外延生长了纤锌矿ZnO(10-10)和立方ZnO(001)两种非极性的薄膜。并对ZnO(10-10)薄膜进行了掺氮的初步探索研究。采用原位的反射高能电子衍射(RHEED)、原位的扫描隧道显微镜(STM)、异位的原子力显微镜(AFM)、异位的X射线衍射(XRD)对所生长的薄膜...In recent decades, the wide-bandgap semiconductor ZnO has attracted much attention of the researchers because of its many advantages. However, its application in optoelectronics is still being hindered due to the difficulties in fabricating stable ptype materials. This work aims at seeking the possibility of p-type doping by using non-polar structure of ZnO. Both wurtzite ZnO (10-10) and cubic Zn...学位:理学硕士院系专业:物理与机电工程学院_光伏工程学号:1982012115275

    Development of Catalysts for CWAO of Ammonia and the Effect of Weak Acid on Reaction

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    氨氮废水对环境的危害日益严重,无害化处理迫在眉睫。催化湿式氧化法(CWAO)是一种有效处理氨氮废水的方法,可在空气条件下一次性将氨氮转化为无害的氮气。本文采用CWAO处理氨氮废水,从解决催化剂活化氧能力及pH对反应的影响这两个角度出发,进行催化剂及弱酸对反应影响的研究。首先,利用Pd和Ni的协同作用,研制出低温高效双金属PdNi/DarcoG60催化剂。然后,根据pH对氨氮氧化反应的影响,创新性地利用弱酸根离子调节反应过程中H+的量,在温和的反应条件下提高催化剂催化湿式氧化性能。主要研究结果如下: 第一,载体和制备方法筛选表明,化学还原法制备的Pd/DarcoG60催化剂催化湿式氧化氨氮性能...The pollution of wastewater containing ammonia becomes more and more serious and harmless treatment of ammonia wastewater is crucial. Among the treatment methods, catalytic wet air oxidation (CWAO) is an effective technology for ammonia harmless treatment. In this work, CWAO is used to treat ammonia containing wastewater. The catalyst and the effect of weak acid on reaction are studied from two as...学位:工学硕士院系专业:化学化工学院_化学工程学号:2062014115139

    The Influential Factors of WeChat Official Account Advertisements’ Adopt Intention:An Study Based on the Theory of Planned Behavior

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    广告接受意愿的研究本质上是对广告传播产生的心理效果的考量,始于学界对广告态度的关注,20世纪90年代以后渐成规模。目前,国内外相关研究涉及到手机广告、网页广告、邮件广告、社交媒体广告等多种类型。但是,在独具中国特色的微信公众号广告蓬勃发展的今天,针对公众号广告的实证研究却处于相对空白的阶段。而微信公众号广告作为一种强社交APP中的广告,接受意愿是其传播效果研究的一部分,具有很强的应用研究价值。 本研究立足用户视角,以社会心理学科的计划行为理论(TPB)为基础,探索研究公众号的使用者即用户,对微信公众号广告的接受意愿及其影响因素。借鉴微信公众号广告相关的移动广告和社交媒体广告接受意愿研究文献资...The study of the willingness to accept advertisements is essentially a consideration of the psychological effects on advertising communication, which began with the attention to advertising attitude and developed rapidly since the 1990s. So far, the domestic and foreign related researches have involved mobile advertising, web advertising, e-mail advertising, social media advertising and other type...学位:文学硕士院系专业:新闻传播学院_广告学学号:3192014115302

    Design and Implementation of Online Meal Ordering System Based on B/S

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    互联网的快速发展加速了社会经济全球化地进程,网络对于现代人而言已经成为生活中不可或缺的重要组成部分,其应用之广、影响之大远远超乎人的想象,人们的日常生活习惯也伴随着网络的全面普及发生了前所未有的变化。网络购物便是互联网时代的产物,网络购物的快速兴起,使得人们不必再受生活节奏加快却无闲暇逛街购物以及城市交通越来越拥堵等现实条件的困扰,足不出户、随时随地就能轻松地通过互联网浏览世界各地的各类商品信息,轻触鼠标或是手机屏幕就能方便快捷地搜索并购买到自己所需要的商品,这一新型购物方式不仅被越来越多的人所接受,并且有取代传统购物方式成为主流消费的趋势。 餐饮业作为中国国内消费市场增幅最大、增速最快的行...The rapid development of the Internet has accelerated the process of social and economic globalization. The network has become an indispensable part of life in modern life, the application of which is far beyond the imagination of people's daily life. Accompanied by the popularization of the network, people’s daily habits have changed unprecedentedly. The online shopping is the product of the Inte...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323193
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