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Impact of well placement and flow rate on production efficiency and stress field in the fractured geothermal reservoirs

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Deep Underground Science and engineering 2024年第3期3卷 358-368页

作者： Xinghui wu Meifeng Cai xu wu Ketong Zhang Ziqing Yin Yu Zhu School of City and Architecture engineering Zaozhuang UniversityZaozhuangChina School of Civil and resource engineering University of Science and Technology BeijingBeijingChina beijing Municipal engineering Research Institute BeijingChina department of Civil and Environmental engineering University of StrathclydeGlasgowUK

Geothermal energy has gained wide attention as a renewable alternative for mitigating greenhouse gas *** advancements in enhanced geothermal system technology have enabled the exploitation of previously inaccessible geothermal ***,the extraction of geothermal energy from deep reservoirs poses many challenges due to high‐temperature and high‐geostress *** factors can significantly impact the surrounding rock and its fracture formation.A comprehensive understanding of the thermal–hydraulic–mechanical(THM)coupling effect is crucial to the safe and efficient exploitation of geothermal *** study presented a THM coupling numerical model for the geothermal reservoir of the Yangbajing geothermal *** proposed model investigated the geothermal exploitation performance and the stress distribution within the reservoir under various combinations of geothermal wells and mass flow *** geothermal system performance was evaluated by the criteria of outlet temperature and geothermal *** results indicate that the longer distance between wells can increase the outlet temperature of production wells and improve extraction efficiency in the short *** contrast,the shorter distance between wells can reduce the heat exchange area and thus mitigate the impact on the reservoir stress.A larger mass flow rate is conducive to the production capacity enhancement of the geothermal system and,in turn causes a wider range of stress *** findings provide valuable insights into the optimization of geothermal energy extraction while considering reservoir safety and long‐term *** study deepens the understanding of the THM coupling effects in geothermal systems and provides an efficient and environmentally friendly strategy for a geothermal energy system.

关键词： geothermal exploitation performance geothermal reservoir mass flow rate stress field well placementa

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The Application of Fuzzy Evaluation based on GIS in Tianjin Urban Underground Space resource Appraisal

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地学前缘 2009年第S1期16卷 186-186页

作者： Fang xu~(1,2.,Jian Shen~1 1.department of City Geology,Tianjin Institute of Geological Survey,Tianjin 300191,China. 2.Faculty of {2. and Safety {2.,China university of mining and technology(beijing),beijing 100083,China

The exploitation and utilization of the city underground space resource is the important approach of building tri-dimensional and ecological cities, solving the environment,resource,and population crisis and continuing cities *** article, based on the introduction in detail the overview of regional geology,hydrogeologic condition,engineering geology,environmental geology,*** center city of Tianjin,establishes evaluating model of urban underground space resource based on GIS

关键词： geology information system fuzzy evaluation underground space resource appraisal Tianjin

Frontiers in high entropy alloys and high entropy functional materials

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Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao Zhang Wen huang Fu-Jie Yu Qi Zhao Xin-Dong Zhu Tao Feng Yao Jiang Xiao-Ming Li xue-Fei Miao He Zhu Si Lan xue-Qian Wang Bao-Long Shen Zhe Jia Feng-Qi Zhang Wei Wang Qi Liu Yang Ren xun-Li Wang Xiao-Ya Cui Xiao-Yang Wang Ya-Nan Chen Bing-Bing Fan Meng-Ru Li Qi-Long Gao Jia-Ming Guo Zeng-Bao Jiao Zhi-Min Guo Yu-Ping Zhao Qian Yu Rui huang Ling-Kun Zhang Yi-Ping Lu xu-Bo Li huai-Jun Lin Yan Ma Wei-Ming Yang Zhi-hua Shen Hai-Yan He Yong-Gang Sun Yong-Jiang huang De-Zhuang Wang Qing-Feng Liu Fei-Yang Wang Hui Liu Hong-Hui wu Li-qiang Wang Yang Lu Nan Wang Tian-Li Wang Wei-Bing Liao Yi-Han Wang Yuan wu Yu-Zhen Yin Jie Pan Yi Zhang Qing Wang Jian-Yang Zhang Tao Yang Yasir Sohail Jin-Yu Zhang hua Ji qiang Li Wei-Di Liu Zhi-Gang Chen Xiong-Jun Liu Wen Ma Liang Mao Zhen-Duo wu School of Materials Science and engineering Nanjing University of Science and Technology Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and Engineering Southeast University department of Physics City University of Hong Kong School of Materials Science and engineering Tianjin University School of Physics and Microelectronics Zhengzhou University department of Mechanical engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Key Laboratory of Solidification Control and Digital Preparation technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Institute of Advanced Wear & Corrosion Resistance and Functional Materials Jinan University School of Mechanics and Civil engineering China University of Mining and Technology School of Physical Sciences Great Bay University School of Materials Science andengineering Harbin Institute of Technology State Key Laboratory of Materials-Oriented Chemical engineering College of Chemical Engineering Nanjing Tech University beijing Advanced Innovation Center for Materials Genome engineering Research Institute for Carbon Neutrality University of Science and Technology Beijing department of Mechanical engineering The University of Hong Kong School of Computing Macquarie University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing State Key Laboratory of Materials Processing and Die & Mould technology School of Materials Science and Engineering Huazhong University of Science and Technology Institute of materials Shanghai University department of Materials Science and engineering C

Owing to their exceptional properties, high-entropy alloys(HEAs) and high-entropy materials have emerged as promising research areas and shown diverse applications. Here,the recent advances in the field are comprehensively reviewed,organized into five sections. The first section introduces the background of HEAs, covering their definition, significance,application prospects, basic properties, design principles, and microstructure. The subsequent section focuses on cutting-edge high-entropy structural materials, highlighting developments such as nanostructured alloys, grain boundary engineering,eutectic systems, cryogenic alloys, thin films, micro-nano-lattice structures, additive manufacturing, high entropy metallic glasses, nano-precipitate strengthened alloys, composition modulation, alloy fibers, and refractory systems. In the following section, the emphasis shifts to functional materials, exploring HEAs as catalysts, magneto-caloric materials, corrosion-resistant alloys, radiation-resistant alloys, hydrogen storage systems, and materials for biomedicine. Additionally, the review encompasses functional high-entropy materials outside the realm of alloys, including thermoelectric, quantum dots, nanooxide catalysts, energy storage materials, negative thermal expansion ceramics,and high-entropy wave absorption materials. The paper concludes with an outlook, discussing future directions and potential growth areas in the field. Through this comprehensive review,researchers, engineers, and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： Cutting-edge structural materials Cutting-edgefunctional materials High entropy alloys

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综放开采顶煤瓦斯渗透性研究

湘潭矿业学院学报 2002年第4期17卷 1-4页

作者：程国明吴健王思敬中国科学院地质与地球物理研究所北京100029 中国矿业大学资源系北京100083

综放开采由于采高的加大,导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异.针对目前综放开采瓦斯渗透性理论存在的问题,在有关研究的基础上,结合综放开采的实际,通过引入等效弹模、裂隙不均匀系数及有效应力对已有岩体渗透系数表... 详细信息

综放开采由于采高的加大,导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异.针对目前综放开采瓦斯渗透性理论存在的问题,在有关研究的基础上,结合综放开采的实际,通过引入等效弹模、裂隙不均匀系数及有效应力对已有岩体渗透系数表达式进行修正,从而给出综放开采采场前方顶煤中瓦斯渗透系数的数学表达式,并给出现场计算实例.图1,参14.

关键词：综放开采裂隙渗透系数有效应力损伤力学采高瓦斯

西北干旱区SG-SPAC系统水力模型的建立

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水文地质工程地质 2002年第4期29卷 62-64,75页

作者：武强张志忠董东林中国矿业大学资源开发工程系北京100083

文章论述了西北干旱区水资源的特点 ,利用现代农田水分研究方法研究了干旱区地表水、地下水、土壤、植物、大气连续体 (SG SPAC)系统的水分转化规律 ,建立了地表水、地下水和土壤水之间的水力耦合模型 ,为干旱区的水资源规划、开发和生... 详细信息

文章论述了西北干旱区水资源的特点 ,利用现代农田水分研究方法研究了干旱区地表水、地下水、土壤、植物、大气连续体 (SG SPAC)系统的水分转化规律 ,建立了地表水、地下水和土壤水之间的水力耦合模型 ,为干旱区的水资源规划、开发和生态环境保护奠定了科学的基础。

关键词：干旱区 SG-SPAC系统水力耦合模型生态环境西北地区地表水地下水土壤植物

土地开发整理投资估算分析方法探析—─以江苏省为例

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土壤 2004年第4期36卷 359-364页

作者：吴飞李闽陈江龙周生路南京大学城市与资源学系南京210093 南京农业大学土地管理学院南京210095

本研究建立单位面积标准投资估算法和重点项目投资估算法来估算区域土地开发整理总投资量和重点项目、重点工程的投资额。分析了土地开发整理投资影响因素,并采用灰色关联分析方法确定其权重,据此计算出重点项目估算法中参数 n。根据上... 详细信息

本研究建立单位面积标准投资估算法和重点项目投资估算法来估算区域土地开发整理总投资量和重点项目、重点工程的投资额。分析了土地开发整理投资影响因素,并采用灰色关联分析方法确定其权重,据此计算出重点项目估算法中参数 n。根据上述方法估算了江苏省规划期内(2.01～2.10 年)土地开发整理总投资量和各重点项目的投资额。

关键词：土地开发整理投资估算灰色关联分析江苏省

Flux Vector Splitting Schemes for Water Hammer Flows in Pumping Supply Systems with Air Vessels

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Journal of Harbin Institute of technology(New Series) 2015年第3期22卷 69-74页

作者： qiang Sun Yuebin wu Ying {2. Tae Uk Jang School of Municipal & Environmental engineering Harbin Institute of Technology State Key Laboratory of Urban Water resource and Environment Harbin Institute of Technology School of Energy and Architecture Harbin University of Commerce department of Mechanics Kim II-Sung University

To solve water hammer problems in pipeline systems,many numerical simulation approaches have been developed. This paper improves a flux vector splitting( FVS) scheme whose grid is the same as the fixedgrid MOC scheme. The proposed FVS scheme is used to analyze water hammer problems caused by a pump abrupt shutdown in a pumping system with an air vessel. This paper also proposes a pump-valve-vessel model combining a pump-valve model with an air vessel model. The results show that the data obtained by the FVS scheme are similar to the ones obtained by the fixed-grid method of characteristics( MOC). And the results using the pump-valve-vessel model are almost the same as the ones using both the pump-valve model and the air vessel model. Therefore,it is effective that the proposed FVS scheme is used to solve water hammer problems and the pump-valve-vessel model replaces both the pump-valve model and the air vessel model to simulate water hammer flows in the pumping system with the air vessel.

关键词： water hammer method of characteristics flux vector splitting air vessel

A human-specific insertion promotes cell proliferation and migration by enhancing TBC1D8B expression

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Science China(Life Sciences) 2024年第4期67卷 765-777页

作者： Hui Zhao Lin-Lin Liu Jian Sun Lian Jin Hai-Bing Xie Jian-Bo Li Hui xu Dong-Dong wu Xiao-Lin Z{2.ng Min-Sheng Peng Ya-Jun Guo Wei-Zhu Qian Newton OOtecko Wei-Jie Sun Liang-Hu Qu Jie He Zhao-Li Chen Rong Liu Ce-Shi Chen Ya-Ping Zhang State Key Laboratory for Conservation and Utilization of Bio-resource School of Life SciencesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091China School of Forensic Medicine Kunming Medical UniversityKunming 650500China Academy of Biomedical engineering Kunming Medical UniversityKunming 650500China The Third Affiliated Hospital Kunming Medical UniversityKunming 650118China Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province Kunming Institute of ZoologyChinese Academy of SciencesKunming 650201China State Key Laboratory of Genetic resources and Evolution Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of SciencesKunming 650201China The Key Laboratory of Gene engineering of the Ministry of Education State Key Laboratory for BiocontrolSun Yat-sen UniversityGuangzhou 510275China National engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell engineering and Antibody Shanghai 201203China department of Thoracic Surgery Cancer Institute and HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Human-specific insertions play important roles in human phenotypes and *** we reported a 446-bp insertion(Insert-446)in intron 11 of the TBC1D8B gene,located on chromosome X,and traced its origin to a portion of intron 6 of the EBF1 gene on chromosome ***,Insert-446 was present in the human Neanderthal and Denisovans genomes,and was fixed in humans after human-chimpanzee *** have demonstrated that Insert-446 acts as an enhancer through binding transcript factors that promotes a higher expression of human TBC1D8B gene as compared with orthologs in *** addition,over-expression TBC1D8B promoted cell proliferation and migration through“a dual finger”catalytic mechanism(Arg538 and Gln573)in the TBC domain in vitro and knockdown of TBC1D8B attenuated tumorigenesis in *** of Insert-446 prevented cell proliferation and migration in cancer and normal *** results reveal that the human-specific Insert-446 promotes cell proliferation and migration by upregulating the expression of TBC1D8B *** findings provide a significant insight into the effects of human-specific insertions on evolution.

关键词： human-specific insertion enhancer gene expression cell proliferation and migration

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处理方式对紫红薯膳食纤维物化性能的影响

食品科技 2009年第9期34卷 104-107页

作者：吴少福上官新晨沈勇根江西农业大学食品科学与工程学院南昌330045 江西农业大学植物资源开发与利用研究室南昌330045

对酸、中温α-淀粉酶和耐高温α-淀粉酶等3种方式制得的紫红薯膳食纤维进行了膨胀力、持水力和阳离子交换能力的试验。结果表明:100℃时3种样品的膨胀力和持水力达到最大值,中温α-淀粉酶处理的样品的膨胀力和持水力优于其他样品;3种样... 详细信息

对酸、中温α-淀粉酶和耐高温α-淀粉酶等3种方式制得的紫红薯膳食纤维进行了膨胀力、持水力和阳离子交换能力的试验。结果表明:100℃时3种样品的膨胀力和持水力达到最大值,中温α-淀粉酶处理的样品的膨胀力和持水力优于其他样品;3种样品都具有一定的阳离子交换能力,酸处理的样品优于其他2.样品。

关键词：膳食纤维紫红薯膨胀力持水力阳离子交换能力