907 research outputs found
Surface Charge Measurements with High Sensitivity and High Resolution Using Kelvin Probe Force Microscopy
Synthesis of Vertically Oriented Two Dimensional Nanomaterials and Their Applications in Electrochemical Energy Storage and Conversion
能源危机和环境污染问题限制了经济的可持续发展,因此开发高效、环境友好的电化学能源储能和转化技术迫在眉睫。随着石墨烯的快速发展,二维纳米材料因其独特的物理化学性质、高的比表面积和二维空间的电子限域作用引起了研究者们的极大兴趣。然而二维纳米材料层间的堆叠或团聚特性不利于其表面的有效利用,特别是在应用于电化学相关领域时,不利于电子和离子的快速传输。如何提升二维纳米材料的传质和传导,是其在电化学应用中亟待解决的瓶颈问题。因此,本论文围绕着二维纳米材料的控制制备和基于二维纳米材料垂直定向组装的多级结构构造展开研究,主要研究内容和结果如下: 第一章,简要介绍了二维纳米材料在电化学储能、电催化以及吸附等领...Since energy crisis and environmental pollution have restricted the sustainable development of economy, there is an urgent need to develop the efficient and environmentally friendly electrochemical technologies for energy storage and conversion. With the rapid progress of graphene, two dimensional (2D) nanomaterials have become a hot research field due to their unique physical and chemical propert...学位:工学博士院系专业:萨本栋微米纳米科学技术研究院_能源化工学号:3352014015417
以數值方法探討卵礫石層的力學行為
Gravel formation involves the mixture of hard gravel and a soil matrix. Knowing the integrated mechanical characteristics of gravel formation is beneficial for engineering constructions and disaster prevention. This study adopts the software PFC2D, which is based on the discrete element method, to investigate the mechanical behavior of gravel formations. First, simulation is carried out through a biaxial test to adjust the micro parameters in PFC2D, and then multiple regression analysis is performed to establish the relationship between macro and micro parameters. Furthermore, with the reasonable micro parameters obtained, the particle size and content of gravel can changed to investigate how they influence mechanical behavior. The results show that the bigger particle size and the greater the content of gravel, the higher the values of shear strength, elastic modulus, Poisson’s ratio and friction angle, but the lower the value of cohesion. In other words, this kind of material has higher shear strength and stronger deformation resistance. These findings correspond with previous research results.卵礫石層是混合堅硬卵礫石與基質土壤之綜合體,了解卵礫石層整體力學性質,對工程建設與災害防治有極大幫助。本研究以台灣中部卵礫石層為對象,運用分離元素法為基礎之軟體PFC2D 探討卵礫石材料力學行為。首先進行雙軸試驗之模擬,校正PFC2D 微觀參數,接著利用複迴歸分析 (multiple regression model)建立宏觀參數與微觀參數間之關係。另外,以得到的合理微觀參數,改變卵礫石粒徑大小與含量,探討粒徑大小和含量對力學性質的影響。結果顯示當卵礫石粒徑越大與含量越多,其剪力強度、彈性模數、柏松比、摩擦角也會越大,但凝聚力略為下降。表示卵礫石粒徑大、含量高之材料,其抗剪強度大,變形性小,此結果與前人研究結果相符
デザイン力と地域振興 : 静岡文化芸術大学冠講座 (浜松ホトニクス株式会社寄附 地域貢献特別講座)
本講演では、地域資源を活用し、川口のデザインによって、地域振興を図ったプロジェクトについて紹介・説明いたします。今回の講演では、地域資源として、静岡県に関係の深い富士山(Mt.Fuji)、道(Road)、木(Wood)、茶(Tea)の四視点を取上げました。浜松ホトニクス株式会社寄附 地域貢献特別講座開催日:2012年11月30日 開催地:静岡文化芸術大学 講
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