30 research outputs found

    The techniques and characterizations of a new H2O2 biosensor prepared with poly(3,4-ethylenedioxythiophene)/BSA complex film

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    在现代医学领域,疾病的预防与诊断方法的研究对人体健康至关重要。传统的临床诊断通常依赖化学和生化手段,操作过程复杂且耗时;有时由于所需程序繁杂以及不可避免的人为错误,使得结果缺少准确性。目前为止,人们正在研究构建生物检测器用于未来的临床诊断,希望一种好的生物检测器应该具有简单、便宜、持久可用甚至易于植入人体等方面的潜力。虽然近年来该领域有了很大的发展,但是在稳定性、灵敏度、可靠性等方面,生物检测器依然在实际应用中面临关键性的技术挑战。因此,构建稳定性好、灵敏度高、持久耐用且具有生物相容性的生物检测器,对人体疾病的预防与诊断具有重要意义。 本论文中,我们利用电化学方法将导电高分子聚二氧乙烯噻吩(...Upon great progress has been made in modern medicine, the development of a variety of pre-diagnostic methods is becoming extremely important to save the lives of human beings.Traditional clinical diagnostic tools often rely on the chemical and biochemical approaches that are often complicated and tiresome, and sometimes may lack precision due to the multiple procedures required and inevitable huma...学位:工学硕士院系专业:化学化工学院_化学工程学号:2062012115140

    两院院士郑哲敏:爱国情怀是科学研究的重要动机

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    郑哲敏以光辉的一生,谱写了一首科技工作者不忘初心、牢记使命的壮丽诗篇,为中国力学事业留下了一座丰碑。2013年1月,北京人民大会堂。我国著名力学家、中国爆炸力学的奠基人和开拓者之一,中国科学院院士、中国工程院院士郑哲敏获颁2012年国家最高科学技术奖证书

    聚羧酸盐与磺酸盐分散剂的复配及其在农药水分散粒剂中的应用研究

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    分散剂在农药水分散粒剂(WDG)制备中具有重要的作用,研究了聚羧酸盐分散剂SD-819和磺酸盐分散剂SD-661的复配对WDG性能的影响。通过测定分散剂的表面张力和WDG的悬浮率等物化参数,发现复配分散剂制备WDG的悬浮率和崩解性等性能优于单一分散剂;同时考察了2种最优配比(3:6和4:3)的复配分散剂制备的WDG,结果表明Zeta电位和表面张力对制剂悬浮率等性能有重要的影响。</p

    乙醇和二甲醚微射流火焰燃烧特性研究

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    采用实验及数值计算研究了乙醇和二甲醚微圆管射流火焰燃烧特性。通过实验观察到不同燃料流速下乙醇和二甲醚火焰都具有四种典型的火焰形态;使用平面激光诱导荧光测试系统获得了微射流火焰的OH基元分布,实验结果表明在较高流速下稳定燃烧的乙醇火焰比二甲醚火焰直径小,且略高于二甲醚火焰;采用考虑详细化学反应机理的数值计算对乙醇和二甲醚火焰进行了数值模拟,计算结果与实验现象吻合较好;利用一维非预混对冲火焰计算进一步研究了这两种燃料的化学反应路径,分析结果表明乙醇和二甲醚火焰的中间产物有显著差异,两种燃料化学反应特性的差异导致了不同的微火焰结构

    Visual analytics towards big data

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    可视分析是大数据分析的重要方法。大数据可视分析旨在利用计算机自动化分析能力的同时,充分挖掘人对于可视化信息的认知能力优势,将人、机的各自强项进行有机融合,借助人机交互式分析方法和交互技术,辅助人们更为直观和高效地洞悉大数据背后的信息、知识与智慧。主要从可视分析领域所强调的认知、可视化、人机交互的综合视角出发,分析了支持大数据可视分析的基础理论,包括支持分析过程的认知理论、信息可视化理论、人机交互与用户界面理论。在此基础上,讨论了面向大数据主流应用的信息可视化技术--面向文本、网络(图)、时空、多维的可视化技术。同时探讨了支持可视分析的人机交互技术,包括支持可视分析过程的界面隐喻与交互组件、多尺度/多焦点/多侧面交互技术、面向 Post-WIMP 的自然交互技术。最后,指出了大数据可视分析领域面临的瓶颈问题与技术挑战。 Visual analytics is an important method used in big data analysis. The aim of big data visual analytics is to take advantage of human’s cognitive abilities in visualizing information while utilizing computer’s capability in automatic analysis. By combining the advantages of both human and computers, along with interactive analysis methods and interaction techniques, big data visual analytics can help people to understand the information, knowledge and wisdom behind big data directly and effectively. This article emphasizes on the cognition, visualization and human computer interaction. It first analyzes the basic theories, including cognition theory, information theory, interaction theory and user interface theory. Based on the analysis, the paper discusses the information visualization techniques used in mainstream applications of big data, such as text visualization techniques, network visualization techniques, spatio-temporal visualization techniques and multi-dimensional visualization techniques. In addition, it reviews the interaction techniques supporting visual analytics, including interface metaphors and interaction components, multi-scale/multi-focus/multi-facet interaction techniques, and natural interaction techniques faced on Post-WIMP. Finally, it discusses the bottleneck problems and technical challenges of big data visual analytics.Visual analytics is an important method used in big data analysis. The aim of big data visual analytics is to take advantage of human's cognitive abilities in visualizing information while utilizing computer's capability in automatic analysis. By combining the advantages of both human and computers, along with interactive analysis methods and interaction techniques, big data visual analytics can help people to understand the information, knowledge and wisdom behind big data directly and effectively. This article emphasizes on the cognition, visualization and human computer interaction. It first analyzes the basic theories, including cognition theory, information theory, interaction theory and user interface theory. Based on the analysis, the paper discusses the information visualization techniques used in mainstream applications of big data, such as text visualization techniques, network visualization techniques, spatio-temporal visualization techniques and multi-dimensional visualization techniques. In addition, it reviews the interaction techniques supporting visual analytics, including interface metaphors and interaction components, multi-scale/multi-focus/multi-facet interaction techniques, and natural interaction techniques faced on Post-WIMP. Finally, it discusses the bottleneck problems and technical challenges of big data visual analytics

    The 3-dimensional cellular automata for HIV infection

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    China National Funds for Distinguished Young Scientists [11125419, 10925525]; Fujian Province Funds for Leading Scientist in UniversitiesThe HIV infection dynamics is discussed in detail with a 3-dimensional cellular automata model in this paper. The model can reproduce the three-phase development, i.e., the acute period, the asymptotic period and the AIDS period, observed in the HIV-infected patients in a clinic. We show that the 3D HIV model performs a better robustness on the model parameters than the 2D cellular automata. Furthermore, we reveal that the occurrence of a perpetual source to successively generate infectious waves to spread to the whole system drives the model from the asymptotic state to the AIDS state. (C) 2013 Elsevier B.V. All rights reserved

    基于传输性能指标预测的光缆可用性评估

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    为准确评估既设光缆未来任务时间是否适用于高性能光端传输设备,提出一种基于传输性能指标预测的光缆可用性评估方法。在构建组合模型准确预测光缆性能指标的基础上,根据光端设备对线路允许损耗变化范围的要求评估光缆的可用性。通过实例验证说明了基于性能指标预测的光缆可用性评估方法的准确性和有效性,对解决光缆可用性评估问题具有一定的参考价值和指导意义

    络合-溶剂热法制备钯基催化剂及其催化氧化间二甲苯性能

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    通过采用络合-溶剂热法、水热法和浸渍法三种方法制备了负载量为0.6%(质量分数)的Pd/Al2O3催化剂,重点考察不同制备方法催化氧化间二甲苯作为典型的挥发性有机化合物的能力。结果表明:络合-溶剂热法制备的Pd/Al2O3-com催化剂催化氧化间二甲苯的能力最强,间二甲苯体积分数为0.002%时完全转化温度(T100)为130℃,低于浸渍法制备催化剂的完全转化温度30℃。对Pd/Al2O3催化剂进行了比表面积(BET)、X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)等表征分析,发现Pd/Al2O3-com中Pd主要以还原态Pd0高度分散于载体表面,而另两种方法制备的催化剂均有明显的Pd2+存在。结合性能测试及表征分析,表明络合-溶剂热法制备的Pd/Al2O3-com催化剂活性组分Pd的高度分散,增强了催化活性,可满足高浓度间二甲苯、宽气体体积空速条件下催化氧化脱除间二甲苯的工业应用要求

    络合溶剂热法制备钯基催化剂及其催化氧化间二甲苯性能

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    通过采用络合-溶剂热法、水热法和浸渍法三种方法制备了负载量为0.6%(质量分数)的Pd/Al2O3催化剂,重点考察不同制备方法催化氧化间二甲苯作为典型的挥发性有机化合物的能力。结果表明:络合-溶剂热法制备的Pd/Al2O3-com催化剂催化氧化间二甲苯的能力最强,间二甲苯体积分数为0.002%时完全转化温度(T100)为130℃,低于浸渍法制备催化剂的完全转化温度30℃。对Pd/Al2O3催化剂进行了比表面积(BET)、X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)等表征分析,发现Pd/Al2O3-com中Pd主要以还原态Pd0高度分散于载体表面,而另两种方法制备的催化剂均有明显的Pd2+存在。结合性能测试及表征分析,表明络合-溶剂热法制备的Pd/Al2O3-com催化剂活性组分Pd的高度分散,增强了催化活性,可满足高浓度间二甲苯、宽气体体积空速条件下催化氧化脱除间二甲苯的工业应用要求
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