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Towards online optimisation of solid oxide fuel cell performance: Combining deep learning with multi-physics simulation

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Energy and AI 2020年第1期1卷 11-21页

作者： Haoran Xu Jingbo Ma Peng Tan Bin Chen Zhen Wu Yanxiang Zhang Huizhi Wang Jin Xuan Meng Ni Department of Chemical engineering Loughborough UniversityLoughboroughUnited Kingdom National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Department of Thermal science and Energy engineering University of Science and Technology of ChinaHefei 230026China Institute of Deep earth sciences and Green Energy Shenzhen UniversityShenzhen 518060China Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’anChina Department of Mechanical engineering Imperial College LondonLondon SW72AZ United Kingdom Department of Building and Real Estate Building Energy Research GroupThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Environmental Energy Research Group Research Institute for Sustainable Urban Development(RISUD)The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

The use of solid oxide fuel cells(SOFCs)is a promising approach towards achieving sustainable electricity pro-duction from *** utilisation of the hydrocarbons and biomass in SOFCs is particularly attractive owing to their wide distribution,high energy density,and low *** long-term operation of SOFCs using such fuels remains difficult owing to a lack of an effective diagnosis and optimisation system,which requires not only a precise analysis but also a fast *** this study,we developed a hybrid model for an on-line analysis of SOFCs at the cell *** model combines a multi-physics simulation(MPS)and deep learning,overcoming the complexity of MPS for a model-based control system,and reducing the cost of building a database(compared with the experiments)for the training of a deep neural *** maximum temperature gradient and heat generation are two target parameters for an efficient operation of *** results show that a precise predic-tion can be achieved from a trained AI algorithm,in which the relative error between the MPS and AI models is less than 1%.Moreover,an online optimisation is realised using a genetic algorithm,achieving the maximum power density within the limitations of the temperature gradient and operating *** method can also be applied to the prediction and optimisation of other non-liner,dynamic systems.

关键词： Solid oxide fuel cell Multi-physics simulation Artificial intelligence Deep neural network Hybrid model On-line optimisation

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英国页岩气：历史回顾

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水文地质工程地质技术方法动态 2012年第5期 49-58页

作者： Richard C. Selley 盖利亚(翻译) Department of earth science & engineering Imperial College London SW7 2AZ UK

1875年英国第一个页岩气井钻于晚侏罗纪的Kimmerdge粘土层中，但其意义在当时没有得到实现。25年前，帝国学院应用美国页岩气范例进行研究，对英国的页岩气潜力进行了评估。在中部地区的石炭系以及侏罗系地层，特别是在维耳德，页岩气... 详细信息

1875年英国第一个页岩气井钻于晚侏罗纪的Kimmerdge粘土层中，但其意义在当时没有得到实现。25年前，帝国学院应用美国页岩气范例进行研究，对英国的页岩气潜力进行了评估。在中部地区的石炭系以及侏罗系地层，特别是在维耳德，页岩气在天然气生产中的持续潜力得到了证实。由于没有女皇陛下政府的支持，这项初步研究没有取得结果。许多英国期刊拒绝出版该项目研究结果。结果最终于1987年在美国出版。能源部对英国石油资源进行了后续评估，2001、2003年先后再次出版，其中省略了页岩气资源。近来，英国地质调查局和能源与气候变化部对英国的页岩气潜力进行了重新评估。尽管一直关注页岩气及其发展前景，但2008年第十三届陆上许可证交易论坛还是批准了几个页岩气勘探项目。Cuadrilla资源的PreeseHalll号钻井钻于2010年，这是第一口专门用于测试英国页岩气的井。相同的钻井和压裂技术使得页岩气在美国复兴，目前正应用于从富含有机质、处于产油窗的页岩中提取石油。一种有趣的推测是，可以采用这种技术在英国南部的Wessex和Weald盆地的热成熟侏罗纪页岩中提取石油。

关键词：页岩气油页岩页岩油英国气体渗透压裂

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Effects of internal stress on remanence intensity jumps across the Verwey transition for multi-domain magnetite

Effects of internal stress on remanence intensity jumps acro...

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中国科学院地质与地球物理研究所2008学术年会

作者： Adrian R.Muxworthy Andrew P.Roberts Department of earth science and engineering Imperial College LondonSouth Kensington CampusLondon SW7 2AZUnited Kingdom National Oceanography Centre University of SouthamptonEuropean WaySouthampton SO14 3ZHUnited Kingdom

The magnetic properties of magnetite(FeO) are strongly dependent on the internal stress related to stress-controlled regions and to closure domains associated with *** contribution of internal stress to the low-temperature magnetic properties of magnetite was tested using annealed and unan-nealed multi-domain(MD) *** low-temperature cooling,a room temperature-induced saturation isothermal remanent magnetization(SIRM) increased abruptly at the Verwey transition (T～122 K).In particular,the absolute intensity jump(δ,defined as the jump in SIRM at T upon cooling) resulted from the high-coercivity fraction of MD *** observe that annealing significantly reduces internal stress and thus decreases the average *** of the alternating field(AF) demagnetization spectra ofδ both for annealed and unannealed magnetites directly linksδ to the internal *** is likely that removal of the closure domain associated with stress-controlled regions was dominant when the peak AF was less than the average micromagnetic coercivity〈h〉,resulting in a net increase ofδ with increasing ***,when the AF exceeded the〈h〉threshold,δ decreased because the stress-controlled regions were *** observations could therefore be useful for estimating the〈h〉of MD magnetite.

关键词： Verwey transition Magnetite Internal stress AF demagnetization Closure domain

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In situ radiographic study of the grain refining behavior of Al_(3)Sc during the solidification of Al-10Cu alloy

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Journal of Materials science & Technology 2022年第27期122卷 33-43页

作者： Yue Wu Yang Tang Ya Zhang Yanan Fu Hui Xing Jiao Zhang Jun Jiang Baode Sun Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240PR China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsCASShanghai 201204PR China State Key Lab of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240PR China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai Jiao Tong UniversityShanghai 200240PR China Mechanical engineering Department Imperial College LondonLondon SW72AZUK

Grain refinement of Al alloys inoculated by rare earth elements,such as Sc,has been extensively acknowledged,while the practical behavior of how inoculant Al_(3)Sc particles affect the refinement in solidification has not been clarified due to the non-transparency of the solidification ***,the microstructural evolution of primary Al_(3)Sc particles andα-Al grains in Al-10 wt.%Cu alloy solidifications with 0.2 wt.%,0.6 wt.%,and 1.0 wt.%Sc additions was investigated by in situ synchrotron X-ray *** detailed mechanisms of curve motion of grains(CMG)and melt convection were *** efficient grains nucleation,uniformly scattered small initial grains,and long duration of melt convection contributed to the best refinement in the 0.6 wt.%Sc addition *** work provides a deep insight into grain refinement in solidification with Sc addition,which will enlighten the composition design and casting process of Al alloys inoculated by rare earth elements.

关键词： Radiography Solidification Melt convection Curve motion of grains Grain refining

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Process engineering of demineralisation of moderate to high ash Indian coals through NaOH‑HCl leaching and HF leaching

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International Journal of Coal science & Technology 2024年第2期11卷 111-122页

作者： Heena Dhawan D.K.Sharma ANRF Ministry of ScienceNew DelhiIndia Department of Energy science and engineering Indian Institute of Technology DelhiNew Delhi 110016India

Chemical leaching of coals would be required to produce cleaner coals for some special applications where physical benefi-ciation may not be effective *** would also help in recovering Li and rare earth metals besides in the sequestration of CO_(2).About 20 Indian coals having complexly distributed moderate to high ash contents were sequentially treated with various alkali–acid such as NaOH-HCl,HF,HCl,HCl-HF,and NaOH-HCl-HF *** aimed to establish and design the best stepwise sequential process for the highest degree of demineralisation through a chemical leaching *** and process intensification studies were carried *** than 80%demineralisation of Madhaipur and Neemcha coals was observed using the best sequential treatment designed *** repeated stepwise treatment of the alkali and the acid was also studied,which was found to significantly enhance the degree of demineralisation of *** integrated process of alkali–acid leaching followed by solvent extraction(Organo-refining)and vice versa of the treated coal was also studied for producing cleaner coals.

关键词： Alkali–acid leaching Demineralisation Integrated process Rare earth elements

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煤矿开采动静载叠加诱发断层冲击地压机理

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engineering 2021年第5期 306-334页

作者：蔡武窦林名司光耀胡亚伟 State Key Laboratory of Coal Resources and Safe Mining School of Mines China University of Mining and Technology Department of earth science and engineering Royal School of Mines Imperial College London School of Minerals and Energy Resources engineering University of New South Wales

断层作为煤层采掘过程中普遍存在的一种地质构造,其独特不连续结构控制着煤岩的变形、破坏与力学性质,该结构与煤层采掘活动之间的相互作用是断层活化及其诱发冲击地压的关键。本文通过调研总结煤层采掘活动与断层赋存状态之间的概念模... 详细信息

断层作为煤层采掘过程中普遍存在的一种地质构造,其独特不连续结构控制着煤岩的变形、破坏与力学性质,该结构与煤层采掘活动之间的相互作用是断层活化及其诱发冲击地压的关键。本文通过调研总结煤层采掘活动与断层赋存状态之间的概念模型,提出了采动应力主导和矿震动载主导两种断层活化类型的力学机制及其动静载叠加诱冲机理;其次,结合物理实验、数值模拟和现场微震监测结果验证了模型与机理的合理性;在此基础上,针对性地探讨了断层冲击地压监测与防治的方法和策略。研究结果表明,断层冲击地压是由断层煤柱高静载与断层活化动载叠加诱发,其中,断层煤柱高静载是断层与顶板结构双重作用导致,断层活化动载是由采动应力主导型局部解锁活化、等效劈裂破坏和矿震动载主导型超低摩擦效应组成。研究结果对于系统理解断层冲击地压机理、监测与防治具有重要指导意义。

关键词：冲击地压断层活化采动应力矿震动载应力断层煤柱

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Geophysical constraints on mesozoic disruption of North China Craton by underplating-triggered lower-crust flow of the Archaean lithosphere

Geophysical constraints on mesozoic disruption of North Chin...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Zhongjie Zhang Yanghua Wang Yangfan Deng Lin Chen Jing Wu Jiwen Teng Yun Chen Weiming Fan Giuliano Panza State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Department of earth science and engineering Imperial College LondonSouth Kensington Campus Guangzhou Institute of Geochemistry Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Department of Mathematics and Geosciences University of Trieste Institute of Geophysics China Earthquake Administration

The mechanism of the disruption,both lithospheric thinning and oceanization of the commonly accepted long-term-stable Archaean craton,is still an open *** available models,all imply a bottom to top *** the construction of a 1660-km-long transect across the eastern North China Craton(NCC),we demonstrate that both the P-wave velocity and density in the lowermost crust beneath the central section are significantly higher than in the corresponding parts of the south and north sections on the *** features are interpreted as geophysical signature of lower crustal underplating, which supplies sufficiently high gravitational potential energy tO trigger lateral flow of the lower *** magma underplating-triggered bilateral lower crust flow may facilitate the lithospheric thinning by means of asthenosphere upwelling and decompression melting,which infill the gap produced by the lower crust *** underplating-triggered lower crustal flow can provide an alternative mechanism to explain the NCC lithosphere disruption,which highlights the crustal feedback to Archaean lithosphere disruption,from top to bottom.

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Lead isotopes in lacustrine sediments and lichen transplants, contrasting and complimentary indicators of sources

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Chinese Journal Of Geochemistry 2006年第B8期25卷 7-7页

作者： Baruch Spiro Dominik J. Weiss Valery Udachin Ben J. Williamson O. William Purvis Richard M Herrington Svetlana Tessalina Department of Mineralogy Natural History Museum London UK Department of earth science and engineering Imperial College London London UK Institute of Mineralogy Russian Academy of Science Miass Russia Laboratoire de Geochemie et Cosmochemie Institut de Physique du Globe Paris France

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非结构网格空气质量模式对东亚强沙尘暴的初步模拟研究

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气候与环境研究 2016年第6期21卷 663-677页

作者：郑捷王自发朱江李杰 FANG F PAIN C C 中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室北京100029 中国科学院大学北京100049 中国科学院大气物理研究所国际气候与环境科学中心北京100029 Applied Modelling and Computation Group Department of Earth Science and Engineering Imperial College London

基于中国科学院大气物理研究所自主研发的嵌套网格空气质量数值预报模式（NAQPMS）和英国帝国理工学院应用计算与建模小组（AMCG）研制的有限元流体模式（Fluidity）,构建了非结构网格沙尘传输模式（Fluidity-Dust）,并模拟再现了2010年... 详细信息

基于中国科学院大气物理研究所自主研发的嵌套网格空气质量数值预报模式（NAQPMS）和英国帝国理工学院应用计算与建模小组（AMCG）研制的有限元流体模式（Fluidity）,构建了非结构网格沙尘传输模式（Fluidity-Dust）,并模拟再现了2010年3月19-22日东亚强沙尘暴整个暴发、演变的三维立体动态过程,从整体上对这次沙尘事件有了全新的直观认识和了解。通过利用FY-2D卫星沙尘反演资料及MODIS（Moderate Resolution Imaging Spectroradiometer）卫星反演的气溶胶光学厚度（AOD）资料,可对模拟结果进行整体上对比验证;同时,利用中国9个城市站点的PM10（空气动力学当量直径小于等于10μm的颗粒物,即可吸入颗粒物）地面观测资料以及日本多个站点的激光雷达资料,逐一对比分析了不同地区PM10的时空分布以及沙尘传输经过时的垂直分布情况;并与NAQPMS模式的沙尘模拟结果进行了模式间的对比分析。对比结果均表明：该模式具有较好的模拟能力,能很好地模拟再现整个沙尘暴过程,为今后进一步运用自适应变网格技术以实现对沙尘暴的高精度追踪模拟奠定了基础。不同模式比较是量化模拟不确定性的重要方法。以往沙尘输送模式比较研究表明：起沙量模拟的不确定性是沙尘暴数值模拟的最大不确定来源。本文通过两个具有相同起沙方案的模式对同一沙尘事件的模拟,发现不同的平流方案以及不同的沉降计算也会对沙尘过程模拟产生重要影响。

关键词：非结构网格空气质量模式 Fluidity-Dust模式 NAQPMS模式东亚强沙尘暴

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岩石原地应力的变化性

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国际地震动态 2011年第1期32卷 17-24页

作者： Hudson J A Feng X-T 米琦（译）姚瑞（校） Department of earth sciences and engineering Imperial College of ScienceTechnology and Medicine London UK Institute of Rock and Soil Mechanics Chinese Academy of SciencesXiaohongshan Wuchang Wuhan 430071 P. R. China 中国科学院研究生院地球科学学院

本文讨论了与不同尺度相关的岩石原地应力的变化性:构造区域尺度、工程场地尺度、洞室挖掘尺度、钻孔测量尺度以及微观尺度。造成这种应力变化性的因素有岩石非均匀性、岩石各向异性、不连续性以及自由面。本文介绍了关于岩石非均匀性... 详细信息

本文讨论了与不同尺度相关的岩石原地应力的变化性:构造区域尺度、工程场地尺度、洞室挖掘尺度、钻孔测量尺度以及微观尺度。造成这种应力变化性的因素有岩石非均匀性、岩石各向异性、不连续性以及自由面。本文介绍了关于岩石非均匀性导致应力变化的数值模拟。通过应力第一不变量的引入使应力随深度的变化变得明确。在锦屏Ⅱ号场地,钻孔中的岩石圆盘化现象得到展示。建议将对岩体的计算机建模作为增强地应力测量结果的一种方法。

关键词：原地应力岩石工程场地钻孔测量非均匀性应力变化地应力测量计算机建模

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