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Mixed ion and electron transport theory and application in solid oxide conductors

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International Journal of Minerals,Metallurgy and Materials 2022年第4期29卷 870-875页

作者： kevin huang Department of Mechanical engineering University of South CarolinaColumbiaSC 292201USA

Mixed ions and electron conductors(MIECs)are an important family of electrocatalysts for electrochemical devices,such as reversible solid oxide cells,rechargeable metal-air batteries,and oxygen transport *** ionic and electronic transports in these materials play a key role in electrocatalytic *** in-depth fundamental understanding of the transport phenomena is critically needed to develop better *** this brief review,we introduced generic ionic and electronic transport theory based on irreversible thermodynamics and applied it to practical oxide-based materials with oxygen vacancies and electrons/holes as the predominant *** oxide systems,namely CeO_(2)-based and La CrO_(3)-based materials,are selected as case studies to illustrate the utility of the transport theory in predicting oxygen partial pressure distribution across MIECs,electrochemical electronic/ionic leakage currents,and the effects of external load current on the leakage currents.

关键词： irreversible thermodynamics diffusivity charge neutrality electrochemical potential electrostatic potential

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地球科学的大数据、数字孪生与水文学

水利信息化 2024年第4期 99-100页

作者： Tiffany C.Vance Thomas huang kevin A.Butler 包鑫如(编译) 不详

地球科学是研究地球物理、化学和生物系统及其相互作用的庞大而复杂的领域。随着基于地球和卫星的传感器数量和分辨率的提高,地球科学数据的体量呈爆炸式增长,这些数据有助于我们探索地球的复杂现象和变化过程,并推动数据分析、可视化... 详细信息

地球科学是研究地球物理、化学和生物系统及其相互作用的庞大而复杂的领域。随着基于地球和卫星的传感器数量和分辨率的提高,地球科学数据的体量呈爆炸式增长,这些数据有助于我们探索地球的复杂现象和变化过程,并推动数据分析、可视化等技术的发展。将地球科学中的大数据定义为对地球系统开展多种观测和模拟而得到的大量、多样且不断积累的复杂数据,这些数据的分析与应用不仅需要大量可用的计算资源,还需要先进的技术和工具。随着大数据和人工智能的应用与发展,用于发现、分析和可视化大数据的技术和工具不断涌现,如Google Earth Engine,Apache Science Data Analytic Platform,The Pangeo Project等,这些平台具有广泛的地理空间数据和计算能力,显著提升了对地球系统的认知水平。

关键词：大数据人工智能地球科学传感器数量复杂数据地理空间数据 Apache 计算能力

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应用于前沿技术节点的集成生产覆盖逐场控制

中国集成电路 2016年第7期25卷 69-75页

作者： Woong Jae Chung John Tristan Karsten Gutjahr Lokesh Subramany Chen Li Yulei Sun Mark Yelverton Young Ki Kim Jeong Soo Kim chin-chou kevin huang William Pierson Ramkumar Karur-Shanmugam Brent Riggs Sven Jug John C.Robinson Lipkong Yap Vidya Ramanathan GLOBALFOUNDRIES 400 Stone Break Road Extension Malta NY 12020 USA KLA-Tencor corp. 1 Technology Drive Milpitas CA 95035 USA

随着前沿HVM流程节点中不断应用光刻和193nm浸没式多重图形技术,逻辑设备的关键层生产覆盖要求几乎已经达到了扫描仪硬件性能的极限。为了满足HVM生产环境极端覆盖的要求,本次研究调查了前沿技术节点的一个新集成覆盖控制构想,它将运行... 详细信息

随着前沿HVM流程节点中不断应用光刻和193nm浸没式多重图形技术,逻辑设备的关键层生产覆盖要求几乎已经达到了扫描仪硬件性能的极限。为了满足HVM生产环境极端覆盖的要求,本次研究调查了前沿技术节点的一个新集成覆盖控制构想,它将运行到运行(R2R)线性或高阶控制回路、周期逐场或每曝光校正(CPE)晶圆流程标记控制回路,以及扫描仪基线控制回路结合,应用到晶圆厂主机APC系统的一个单一集成覆盖控制路径。目标是满足晶圆厂的覆盖性能要求、降低总拥有成本,并提供自由的控制方法。本文将讨论此构想的一个详细实施案例,以及一些初步的结果。

关键词：覆盖 CPE 残余扫描仪覆盖控制逐场校正每曝光校正基线控制

Withdrawal Intention of Farmers from Vacant Rural Homesteads and Its Influencing Mechanism in Northeast china: A Case Study of Jilin Province

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chinese Geographical Science 2023年第4期33卷 634-648页

作者： YU Jiaping LI Jing LO kevin huang Shanlin Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130102China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Department of Geography Hong Kong Baptist UniversityHong Kong 999077China School of Public Administration and Law Northeast Agricultural UniversityHarbin 150030China

The effective use of land in Northeast china is of great significance for ensuring national food security and regional rural *** this study,based on the survey data collected from Jilin Province,Northeast china,we analyzed the vacancy rates of rural homesteads in suburban,outer suburban,and remote villages,as well as the withdrawal intention of rural-settled farmers,urbansettled farmers,and farmers with urban and rural dual residency from vacant *** the perspective of farmers’perceptions,this study constructed a theoretical framework of the influence mechanism of their withdrawal intention and analyzed such mechanism by constructing a structural equation *** results indicated that:1)rural homestead vacancy rates increased with distance from the village to the city.2)rural-settled farmers showed a low withdrawal intention for vacant rural homesteads,followed by urban and rural dual-residence farmers,and urban-settled farmers showed the highest withdrawal intention.3)the relative importance of the factors influencing withdrawal intention is in the following order:policy awareness>interest perception>living environment perception>family ***,this study discussed the reformation of the homestead system and rural homestead transition in Northeast china,which can provide policy support to increase the potential of cultivated land and promote sustainable rural development and urban-rural coordination.

关键词： village hollowing vacant rural homesteads withdrawal intention influence mechanism Northeast china

Fermi surface gapping in the hidden order state of PrFe_(4)P_(12);by point-contact spectroscopy

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Science china(Physics,Mechanics & Astronomy) 2022年第3期65卷 99-105页

作者： Tian Le LiQiang Che Qi huang kevin huang ZhaoFeng Ding Lei Shu Xin Lu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Center for Correlated Matter and Department of Physics Zhejiang UniversityHangzhou 310058China State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200433China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China Zhejiang Province Key Laboratory of Quantum Technology and Device Zhejiang UniversityHangzhou 310027China

We have applied point-contact spectroscopy(PCS) to investigate the nonmagnetic hidden order(HO) state of the skutterudite compound PrFe_(4)P_(12) with its transition temperature THO~6.5 K. Its point-contact conductance curves exhibit a reproducible gap structure in the HO state below THOand its temperature dependent gap magnitude follows a BCS-like mean-field behavior.A Fano-like conductance shape is observed to emerge below the coherence temperature of PrFe_(4)P_(12). In a magnetic field, the gap feature is gradually suppressed and evolves into a pronounced Fano peak, signaling the heavy fermion state and vividly demonstrating the competition between HO and the formation of heavy fermion states. Our results strongly suggest the itinerant characteristic of f electrons in PrFe_(4)P_(12), which constrains theoretical models to explain the HO mechanism.

关键词： point-contact spectroscopy(PCS) hidden order heavy fermion Fermi surface gapping

Amine-immobilized HY zeolite for CO_(2) capture from hot flue gas

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chinese Journal of Chemical Engineering 2022年第3期35卷 335-342页

作者： Wanqiao Liang Jihuan huang Penny Xiao Ranjeet Singh Jining Guo Leila Dehdari Gang kevin Li Department of Chemical Engineering The University of MelbourneParkvilleVictoria 3010Australia

Solid amine-based adsorbents were widely studied as an alternative to liquid amine for post-combustion CO_(2)capture(PCC).However,most of the amine adsorbents suffer from low thermal stability and poor cyclic regenerability at the temperature of hot flue *** we present an amine loaded proton type Y zeolite(HY)where the amines namely monoethanolamine(MEA)and ethylenediamine(ED)are chemical immobilized via ionic bond to the zeolite framework to overcome the amine degradation *** MEA and ED of 5%,10%and 20%(mass)concentration-immobilized zeolites were characterized by X-ray diffraction,Fourier-transform infrared spectroscopy,and N_(2)-196℃ adsorption to confirm the structure integrity,amine functionalization,and surface area,*** determination of the amine loading was given by C,H,N elemental analysis showing that ED has successfully grafted almost twice as many amino groups as MEA within the same solvent ***_(2)adsorption capacity and thermal stability of these samples were measured using thermogravimetric *** adsorption performance was tested at the adsorption temperature of 30,60 and 90℃,respectively using pure CO_(2)while the desorption was carried out with pure N_(2)purge at the same temperature and then followed by elevated temperature at 150℃.It was found that all the amine@HY have a substantial high selectivity of CO_(2)over N_(2).The sample 20%ED@HY has the highest CO_(2)adsorption capacity of1.76 mmol·g^(-1)at 90℃ higher than the capacity on parent Na Y zeolite(1.45 mmol·g^(-1)only).The amine@HY samples presented superior performance in cyclic thermal stability in the condition of the adsorption temperature of 90℃ and the desorption temperature of 150℃.These findings will foster the design of better adsorbents for CO_(2)capture from flue gas in post-combustion power plants.

关键词： Zeolite HY Amine-immobilization CO_(2)capture Monoethanolamine(MEA) Ethylenediamine(ED) Adsorption

A CuO/TiO_(2)Heterojunction Based CO Sensor with High Response and Selectivity

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Energy & Environmental Materials 2023年第3期6卷 409-416页

作者： Wei Wei Huanhuan Zhang Tiyue Tao Xiaohong Xia Yuwen Bao Manon Lourenco kevin Homewood Zhongbing huang Yun Gao Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and MinistrySchool of Materials Science&EngineeringHubei UniversityWuhan 430062China

The use of heterojunctions is a promising solution to the problem of cross-sensitivity in gas *** this work,a carbon monoxide sensor based on the CuO/TiO_(2)heterojunction was designed and *** to the good adsorption properties of CuO materials to CO,and the heterojunction interface charge transfer,the CuO/TiO_(2)thin film sensor exhibits high sensitivity to CO at room *** response is as high as 10.8–200 ppm CO,about 10 times its response to H_(2).Interference from H_(2)is greatly reduced by optimizing the structure of the CuO/TiO_(2)*** reliable detection of carbon monoxide with excellent discrimination against H_(2)is of great significance for the development of CO gas sensors.

关键词： carbon monoxide cross-sensitivity gas sensor heterojunction hydrogen

Multiphysics modeling of solid-oxide iron-air redox battery:analysis and optimization of operation and performance parameters

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Science Bulletin 2016年第17期61卷 1345-1354页

作者： Xinfang Jin kevin huang Department of Mechanical Engineering University of South Carolina

The present study reports a systematic computational analysis of the performance of solid oxide metalair redox battery operated at 800 and 550 ℃ using a recently developed high-fidelity multiphysics *** sets of parameters are particularly investigated:(1) operational parameters including current density and depth of discharge;(2) performance parameters including the chemical reaction kinetic rate constant of the redox cycle unit and exchange current density of the regenerative solid oxide fuel *** two groups of parameters are particularly analyzed with the goal to achieve high specific energy and round trip efficiency for SOIARB operated at different operating temperatures.

关键词： Energy storage Solid oxide fuel cell Battery Modeling FeO reduction Fe3O4 reduction

Long-term improvements in water conservation functions at Qilian Mountain National Park, northwest china

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Journal of Mountain Science 2023年第10期20卷 2885-2897页

作者： GAO Xiang huang Xing-xing CHANG Shu-hang DANG Qian-wen WEN Rui-yang LO kevin LI Jie YAN An College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China Department of Geography Hong Kong Baptist UniversityHong Kong 999077China

Water conservation is one of the most important ecosystem *** study uses the InVEST model to examine the water conservation function of the Qilian Mountain National Park(QMNP),an important water supply area in northwest *** analyzed the spatiotemporal water conservation patterns of QMNP from 1988 to *** showed that the water conservation capacity in QMNP has increased over the past 32 years,reaching a peak of 6.495×108 m3 in *** area with an increased water conservation capacity is 12 times larger than the area with a reduced *** also examined how climatic,land-use,vegetation coverage,and topographical factors influence water conservation *** found that precipitation is the main climatic factor in water *** water conservation function also varies with land-cover type,with forests having the highest capacity,followed by ***,topographical factors,including altitude and slope,also shape the spatial patterns of water conservation functions in QMNP.

关键词： Water conservation function Ecosystem services InVEST model Qilian Mountain National Park Northwest china