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Three-Dimensional Isogeometric Analysis of Flexoelectricity with MATLAB Implementation

Computers, Materials & Continua 2020年第11期65卷 1157-1179页

作者： Hamid Ghasemi harold s.park Xiaoying Zhuang Timon Rabczuk Department of Mechanical Engineering Arak University of TechnologyArak38181-41167Iran Department of Mechanical Engineering Boston UniversityBostonMA 02215USA Division of Computational Mechanics Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Civil Engineering Ton Duc Thang UniversityHo Chi Minh CityVietnam Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia Institute of structural Mechanics Bauhaus-Universität WeimarWeimarD-99423Germany

Flexoelectricity is a general electromechanical phenomenon where the electric polarization exhibits a linear dependency to the gradient of mechanical strain and vice *** truncated pyramid compression test is among the most common setups to estimate the flexoelectric *** present a three-dimensional isogeometric formulation of flexoelectricity with its MATLAB implementation for a truncated pyramid *** educational purposes,this paper presents a precise computational model to illustrate how the localization of strain gradients around pyramidal boundary shapes contributes in generation of electrical *** MATLAB code is supposed to help learners in the Isogeometric Analysis and Finite Elements Methods community to learn how to solve a fully coupled problem,which requires higher order approximations,*** complete MATLAB code which is available as source code distributed under a BsD-style license,is provided in the part of supplementary Materials of the paper.

关键词： Flexoelectricity Isogeometric Analysis(IGA) MATLAB B-spline elements finite elements coupled electromechanical problem

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Multiscale computational understanding and growth of 2D materials:a review

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npj Computational Materials 2020年第1期6卷 1484-1501页

作者： Kasra Momeni Yanzhou Ji Yuanxi Wang shiddartha Paul sara Neshani Dundar E.Yilmaz Yun Kyung shin Difan Zhang Jin-Wu Jiang harold s.park susan sinnott Adri van Duin Vincent Crespi Long-Qing Chen Mechanical Engineering Department Louisiana Tech UniversityRustonLA 71272USA Department of Mechanical Engineering University of AlabamaTuscaloosaALUSA Institute for Micromanufacturing Louisiana Tech UniversityRustonLAUSA Materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Materials science and Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA 2-Dimensional Crystal Consortium The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Physics The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Electrical Engineering Iowa State UniversityAmesIA 50010USA Mechanical Engineering Department The Pennsylvania State UniversityUniversity ParkPA 16802USA shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai 200072China Department of Mechanical Engineering Boston UniversityBostonMA 02215USA Department of Engineering science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Mathematics The Pennsylvania State UniversityUniversity ParkPA 16802USA

The successful discovery and isolation of graphene in 2004,and the subsequent synthesis of layered semiconductors and heterostructures beyond graphene have led to the exploding field of two-dimensional(2D)materials that explore their growth,new atomic-scale physics,and potential device *** review aims to provide an overview of theoretical,computational,and machine learning methods and tools at multiple length and time scales,and discuss how they can be utilized to assist/guide the design and synthesis of 2D materials beyond graphene.

关键词： synthesis utilized subsequent

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selenocysteine tRNAs as Central Components of selenoprotein Biosynthesis in Eukaryotes

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Biomedical and Environmental sciences 1997年第2期10卷 116-124页

作者： sANG ICK park JIN Mo park harold s. CHITTUM EUN sUNG YANG BRADLEY A. CARLsON BYEONG JAE LEE AND DOLPH L. HATFIELD(Laboratory of Experimental Chrcinogenesis, National Cancer Insti tute, National Institutes of Health, Bethesda, MD 20892UsA Laboratory o NCI EXPT CARCINOGENESIS LAB NIH BETHESDA MD 20892 USA

selenocysteine (sec) tRNAs serve as carrier molecules for the biosynthesis of sec from serine and to donate sec to protein in response to specific UGA codons. In this study, we describe the current status of sec tRNAs in higher animals and further we exarnine: (i) the sec tRNA population in Drosophila; (ii) transcription of the sec tRNA in vivo (in Xenopus oocytes) and in vitro (in Xenopus oocyte extracts); (iii) the effect of selenium on the sec tRNA population in various rat tissues following replenishment of extremely selenium deficient rats with this element; and (iv) the biosynthesis of the modified bases on sec tRNA in Xenopus oocytes

关键词： tRNA gene selenocysteine tRNAs as Central Components of selenoprotein Biosynthesis in Eukaryotes

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Clean coal geology in China:Research advance and its future

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International Journal of Coal science & Technology 2020年第2期7卷 299-310页

作者： Xiaoshuai Wang Yuegang Tang shaoqing Wang harold Hschobert College of Geoscience and surveying Engineering China University of Mining and Technology(Beijing)Beijing100083China The EMs Energy Institute The Pennsylvania State UniversityUniversity ParkPennsylvania16802United States schobert International LLCJordanMinnesota55352United States

In China,the connection between coal utilization and environmental pollution has been increasingly evident due to the rapid growth in energy *** coal technology(CCT)is one of the effective methods to address coal-associated ***,CCT needs the practical and theoretical support of clean coal geology(CCG).In this paper,a new definition of CCG is proposed,based on the definitions of coal,coal geology,and CCT,combined with the development of national *** is the discipline comprehensively researching the genesis,nature,distribution,cleaning potential,clean utilization and environmental effects of resources(coal,coal bed methane,and other coal-associated resources)that can be cleaned by *** research content of CCG is discussed from different aspects,such as cleaning potential evaluation,geological guarantee for coal mining,ash yields and sulfur contents,trace elements,pollution caused by coal,and mine *** progress of CCG in China is also briefly divided into four stages and ***,scientific problems in CCG are summarized and an outlook for CCG is given.

关键词： Clean coal Clean coal geology Research content Progress China

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富含树皮体和半丝质体煤的液化反应性和^(13)C-核磁共振分析的研究

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燃料化学学报 2010年第2期38卷 129-133页

作者：王绍清唐跃刚 harold H sCHOBERT 郭琴王凤娟中国矿业大学(北京)煤炭资源与安全开采国家重点实验室北京100083 宾夕法尼亚州立大学能源研究所宾夕法尼亚州16802

通过对富含树皮体的煤和半丝质体的煤进行液化研究和结构分析,探讨其液化产品的产率与结构参数之间的关系。富含树皮体的煤的氢含量和挥发分含量均高,H/C原子比也很高。13C-核磁共振分析表明,所有用煤都以芳香族碳为主。WEsT样品的芳碳... 详细信息

通过对富含树皮体的煤和半丝质体的煤进行液化研究和结构分析,探讨其液化产品的产率与结构参数之间的关系。富含树皮体的煤的氢含量和挥发分含量均高,H/C原子比也很高。13C-核磁共振分析表明,所有用煤都以芳香族碳为主。WEsT样品的芳碳率最高,LP、CG和DHB样品中CH2基团碳含量高于CH3基团碳含量,且CH2基团碳含量高于其他三个样品。而P858样品中CH3基团碳含量高于CH2基团碳含量。液化结果表明,LP、CG和DHB有高的液化转化率和油收率。煤液化的油收率和煤结构中的CH2基团碳含量以及转化率和煤的芳碳率之间都存在明显的相关关系。因此,13C-核磁共振技术可以用来预测煤液化产品的收率。

关键词：煤树皮体半丝质体液化 13C-核磁共振

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隐世私邸长沙柏悦酒店

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室内设计与装修 2024年第11期 44-50页

作者： [英国]Conran and Partners harold de Puymorin(摄影) Conran and Partners

长沙柏悦酒店坐落于长沙国金中心(IFs)T2塔楼的顶部,这里是长沙最富活力的高端商业综合体。艺术与设计酒店由英国的建筑与室内设计公司Conran and Partners设计,其设计理念源起于一座品位卓然的女性环球旅行家所拥有的时尚府邸。

关键词：商业综合体建筑与室内设计环球旅行酒店艺术与设计设计理念塔楼

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