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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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中国乡村教育振兴战略下的教师专业发展与流动

教育理论与实践（新加坡）

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教育理论与实践（新加坡） 2024年第3期 54-58页

作者：吴兴慧长春财经学院吉林长春130122

本文旨在探讨中国乡村教育振兴战略下教师专业发展与流动的现状、问题及对策。通过文献综述和案例分析,本研究揭示了乡村教师在专业成长和流动中面临的挑战,包括教育资源不均、职业发展机会有限和政策环境的影响。文章提出了针对性的政... 详细信息

本文旨在探讨中国乡村教育振兴战略下教师专业发展与流动的现状、问题及对策。通过文献综述和案例分析,本研究揭示了乡村教师在专业成长和流动中面临的挑战,包括教育资源不均、职业发展机会有限和政策环境的影响。文章提出了针对性的政策建议和实践策略,以促进教师专业发展,优化教师流动机制,并推动乡村教育的均衡发展。研究结果表明,通过个性化发展计划、持续教育与培训、专业发展支持系统和激励机制,可以有效提升乡村教师的专业能力。同时,建立透明的流动政策、区域协调机制和流动支持服务,有助于合理引导教师流动,缩小城乡教育差距。本文为教育决策者和实践者提供了理论依据和实践指导,以实现教育公平和质量提升。

关键词：乡村教育振兴教师专业发展教师流动政策建议教育公平

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A Study on Nanoscale Infrared Absorbent Working in Waveband Range of 1300-400 cm^(-1)

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Journal of Materials Science & Technology 2008年第5期24卷 750-752页

作者： Yongmao HU Jinzhong XIANG Xueqing ZHANG Ruheng LI xinghui wu Department of Material Scienceand Engineering Yunnan University Kunming 650091 China College of Physics and Electronic Information Dali University Dali 671003 China

Nanoscale powder of SiO2/Al2O3/TiO2 composite was prepared by sol-gel method. Microstructure and morphology of the obtained samples were characterized by infrared （IR）, X-ray diffraction （XRD） analysis and transmission electron microscopy （TEM）. It is proved that infrared absorbing peaks of the samples are in waveband range of 1300-400 cm^-1, and the peak shape changes with their component. Mechanism of the infrared peak＇s positions and shapes which changes with the size and morphology of the prepared nano-particles has been tentatively discussed.

关键词： Nanoscale materials Sol-gel method Infrared absorbency

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Cu Diffusion in Co/Cu/TiN Films for Cu Metallization

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Journal of Materials Science & Technology 2006年第3期22卷 342-344页

作者： Xiuhua CHEN xinghui wu Jinzhong XIANG Zhenlai ZHOU Heyun ZHAO Liqiang CHEN Department of Materials Science and Engineering Yunnan University Kunming 650091 China

Some information on how to use in-situ determined diffusion coefficient of Cu to make barrier layer of Cu metallization in ultra large scale integrations （ULSIs） was provided. Diffusion coefficients of Cu in Co at low temperature were determined to analyze Cu migration to Co surface layer. The diffusion depths were analyzed using X-ray photoelectron spectroscopy （XPS） depth profile to investigate the diffusion effect of Cu in Co at different temperatures. The possible pretreatment temperature and time of barrier layer can be predicted according to the diffusion coefficients of Cu in Co.

关键词： Cu diffusion Sputtering method Co/Cu/TiN film Metallization

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The Research on Growth Temperature of Ge/Si Thin Films Grown by Magnetron Sputtering

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稀有金属材料与工程 2006年第A3期35卷 564-566页

作者： Xu Mao Yingxia Jin Zhenlai Zhou YU Yang xinghui wu Fuxue Zhang Research Centre of Sensor Technology Beijing Information Technology Institute Beijing 100101 China Department of Materials Science and Engineering Yunnan University Kunming 650091 China

The films of Ge and Si were grown on the substrate Si (100) by magnetron sputtering at 2.5 Pa Ar *** growth temperature of films was 100℃,250℃,400℃and 550℃.The structure and composition were analysised by Raman *** poly-crystal peak and crystal peak of Ge were observed in these *** results indicate that the single crystal film of Ge was prepared at the substrate temperature of 400℃.The peak of acoustic phonons of Ge was 98 cm^(-1) and that of Si was 170 cm^(-1).

关键词： Ge/Si thin film Raman scattering growth temperature

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徐灰含水层注浆扩散半径影响因素及注浆优化方案

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枣庄学院学报 2024年第5期41卷 55-61页

作者：吴星辉钟辉王刚顾树煕丁加杰孔金浩枣庄学院城市与建筑工程学院山东枣庄277160 山东能源集团赵官能源有限责任公司山东齐河251113

在煤矿防治水注浆治理领域,顶底板加固改造过程中普遍存在钻孔的高吃浆量和注浆材料成本高的问题,为解决钻孔水流量过大、注浆材料吸收不足和注浆扩散半径受限等技术难题。通过综合分析钻孔结构、地层位置、岩石性质、出水量、水质成分... 详细信息

在煤矿防治水注浆治理领域,顶底板加固改造过程中普遍存在钻孔的高吃浆量和注浆材料成本高的问题,为解决钻孔水流量过大、注浆材料吸收不足和注浆扩散半径受限等技术难题。通过综合分析钻孔结构、地层位置、岩石性质、出水量、水质成分以及注浆压力等注浆影响因素,增加钻孔注浆的扩散半径。结果表明,通过优化注浆影响因素增加注浆扩散半径,可以有效降低注浆成本,同时显著提升徐灰含水层的注浆效果。

关键词：防治水注浆治理注浆扩散半径注浆材料优化

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Genesis of the Jianbeigou Gold Deposit on the Southern Margin of the North China Craton: Insights from Fluid Inclusions, H-O-S Isotopes, and Pyrite in situ Trace Element Analyses

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 969-991页

作者： LI Fengchun ZENG Qingdong ZHU Rixiang CHU Shaoxiong XIE Wei YU Bing wu Jinjian LI xinghui Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Earth Science and Engineering Hebei University of EngineeringHandanHebei 056038China

The Jianbeigou gold deposit is a typical lode gold deposit in the Qinling metallogenic belt, located on the southern margin of the North China Craton. Three stages of the hydrothermal process can be distinguished, including the quartz ± pyrite, quartz-polymetallic sulfide, and quartz-carbonate ± pyrite stages. From the early to late stages, the homogenization temperatures of primary fluid inclusions are 281–362°C, 227–331°C, and 149–261°C, respectively. The corresponding salinities estimated for these fluids are 3.9–9.9 wt%, 0.4–9.4 wt%, and 0.7–7.2 wt% Na Cl equiv. Combined with laser Raman spectroscopy data, the ore-forming fluid belongs to a H_(2)O-CO_(2)-Na Cl ± CH_4 system with medium–low temperature and salinity. The δ~(18)Ofluid and δD values for the quartz veins are-1.0‰ to 6.0‰ and-105‰ to-84‰, respectively, which indicates that the ore-forming fluid is of mixed source, mainly derived from magma, with a contribution from meteoric water. Pyrite has been identified into three generations based on mineral paragenetic sequencing, including Py1, Py2, and Py3. The pyrites have δ~(34)S sulfur isotopic compositions from three stages between 3.7‰ and 8.4‰, indicating that sulfur mainly originated from magma. Te, Bi, Sb, and Cu contents in pyrite were all high and showed a strong correlation with Au concentrations. Native gold and the Au-Ag-Bi telluride minerals were formed concurrently, and the As concentration was low and decoupled from the Au content. Therefore, Te, Bi, Sb and other low-melting point chalcophile elements play an important role for gold mineralization in arsenic-deficient ore-forming fluid. Combined with the geological setting, evolution of pyrite, and ore-fluids geochemistry, we propose that the Jianbeigou deposit can be classified as a magmatic–hydrothermal lode gold deposit. Gold mineralization on the southern margin of the North China Craton is related to Early Cretaceous magmatism and formed in an extensional setting.

关键词： ore genesis H-O-S isotopes fluid inclusions in-situ trace element Jianbeigou gold deposit

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A novel mouse model of PEDF-associated serious liver inflammation,hepatic tumorigenesis and cardiovascular injury mimics human nonalcoholic steatohepatitis

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Genes & Diseases 2024年第1期11卷 11-14页

作者： xinghui Li Haiping Wang Yandi wu Li Zou Shijie Dengg Xintu Fu Tongsheng Huang Conghui Shen Teng wu Weibin Cai Guangdong Engineering&Technology Research Center for Disease-Model Animals Laboratory Animal CenterZhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 510080China Department of Biochemistry Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 510080China School of Pharmacy Guangdong Pharmaceutical UniversityGuangzhouGuangdong 510006China Guangdong Provincial Key Laboratory of Digestive Cancer Research The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhenGuangdong 518107China

There are no approvedtherapeuticdrugs for nonalcoholic steatohepatitis(NASH)due to the many bottlenecks,including the lack of preclinical animal models that can perfectly mimic human NASH features,such as systemic metabolic disorders,hepatic steatosis,intense liver inflammation and fibrosis,liver tumorigenesis,and cardiovascularcomplications.i,2"Pigment"epitheliumderived factor(PEDF)is a lipid metabolism regulator with high expression in the liver,and its reduced expression in the liver is closely related to the development of nonalcoholic fatty liver disease(NAFLD).

关键词： inflammation PEDF hepatic

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一种新型的高灵敏度光纤传感器的研究

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压电与声光 2022年第5期44卷 801-805页

作者：武兴会河南工程学院电气信息工程学院河南郑州451191

为了提高传感器的灵敏度和线性度,该文提出了改变光纤的表面粗糙度和探针类型。首先通过自主搭建轮式光纤侧面抛磨系统,将光纤的一端镀一层Ag膜作为反射镜面,制备得到表面较粗糙的D型光纤探针。通过检测探针的传感特性发现,被测溶液折... 详细信息

为了提高传感器的灵敏度和线性度,该文提出了改变光纤的表面粗糙度和探针类型。首先通过自主搭建轮式光纤侧面抛磨系统,将光纤的一端镀一层Ag膜作为反射镜面,制备得到表面较粗糙的D型光纤探针。通过检测探针的传感特性发现,被测溶液折射率的变化会引起不同能量的吸收,由此使光功率计接收的光功率发生改变。经测试,制备的D型光纤传感器稳定性及线性度均很好,尤其是抛磨损耗为18 dB的传感器的灵敏度和线性相关系数分别高达66.02 dB/RIU和99.58%。通过对折射率的精度进行测量和计算,得到其精度高达0.00004。结果表明,该传感结构具有广泛应用于生化传感(如新冠疫情等)及对环境污染程度进行实时监测的潜力。

关键词：高灵敏度抛磨粗糙度线性度 D型光纤传感器

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Red-Emissive Organic Room-Temperature Phosphorescence Material for Time-Resolved Luminescence Bioimaging

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CCS Chemistry 2022年第8期4卷 2550-2559页

作者： Wenbo Dai Yahui Zhang xinghui wu Shuai Guo Jieran Ma Jianbing Shi Bin Tong Zhengxu Cai Haiyan Xie Yuping Dong Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081 School of Life Science Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijing 100081

Organic room-temperature phosphorescence(RTP)materials have been used in high-resolution ***,the development of long-wavelength-emis sion RTP materials in aqueous solution remains a ***,we report red-emissive RTP mate... 详细信息

关键词： red-emissive nanoparticle room-temperature phosphorescence fused-ring molecules dual channel imaging time-resolved luminescence imaging

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