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Geological conditions and reservoir characteristics of various shales in major shalehosted regions of China

China Geology 2024年第1期7卷 138-149页

作者： Shu-jing Bao Tian-xu Guo Jin-tao Yin wei-bin Liu Sheng-jian Wang Hao-han Li Zhi Zhou Shi-zhen Li Xiang-lin Chen The Key Laboratory of Unconventional Petroleum Geology China Geological SurveyMinistry of Natural Resources100083 BeijingChina Oil and Gas Survey China Geological Survey100083 BeijingChina Research Institute of Yanchang Petroleum(Group)CO.LTD 710076 Xi’anChina

China is home to shales of three facies:Marine shale,continental shale,and marine-continental transitional *** types of shale gas are associated with significantly different formation conditions and major controlling *** study compared the geological characteristics of various shales and analyzed the influences of different parameters on the formation and accumulation of shale *** general,shales in China’s several regions exhibit high total organic carbon(TOC)contents,which lays a sound material basis for shale gas *** strata generally show high degrees of thermal *** contrast,continental shales manifest low degrees of thermal evolution,necessitating focusing on areas with relatively high degrees of thermal evolution in the process of shale gas surveys for these *** shales of the Wufeng and Silurian formations constitute the most favorable shale gas reservoirs since they exhibit the highest porosity among the three types of *** shales are followed by those in the Niutitang and Longtan *** contrast,the shales of the Doushantuo,Yanchang,and Qingshankou formations manifest low ***,the shales of the Wufeng and Longmaxi formations exhibit high brittle mineral *** a low siliceous mineral content,the shales of the Doushantuo Formation feature a high carbonate mineral content,which can increase the shales’brittleness to some *** marine-continental transitional shales,where thin interbeds of tight sandstone with unequal thicknesses are generally found,it is recommended that fracturing combined with drainage of multiple sets of lithologic strata should be employed to enhance their shale gas production.

关键词： Shale gas Marine shale Continental shale Marine-continental transitional shale Neoproterozoic-Cretaceous strata Geological conditions Reservoir characteristics Petroleum geological survey engineering

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Rapid detection of nanoplastic particles by a luminescent Tb-based coordination polymer

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Chinese Chemical Letters 2024年第5期35卷 529-533页

作者： Tiankai Sun Hui Min Zongsu han Liang Wang Peng Cheng wei Shi Department of Chemistry College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Separation Membranes and Membrane Processes School of Environmental Science and EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Advanced Energy Materials Chemistry(MOE) Frontiers Science Center for New Organic Matter and Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Nanoplastics(NPs)in aqueous environment have become a category of emerging pollutants on account of their potential risks to both human health and *** detection of NPs is a great challenge due to the lack of sensitive and selective sensing materials with fast response time and wide sensing range of particle ***,a Tb-based coordination polymer has been synthesized for luminescent detection of nanopolystyrene with different particle sizes in aqueous solutions,showing a low limit of detection,fast response time within 10 s and high selectivity in the presence of other ***“turn-on”sensing mechanism is studied in *** work provides a facile method for the fast detection of NPs.

关键词： Coordination polymer Nano polystyrene Luminescent detection Sensing mechanism Water safety

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Single droplet formation by controlling the viscoelasticity of polymer solutions during inkjet printing

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Chinese Chemical Letters 2024年第6期35卷 244-248页

作者： Dong Lv Xuelei Liu wei Li Qiang Zhang Xinhong Yu Yanchun han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Inkjet printing has emerged as a potential solution processing method for large-area patterned *** inkjet printing,a single droplet without satellite droplet is required for high-quality ***,we propose a strategy for obtaining a single droplet by adjusting the reduced concentration(c/c^(*),where c^(*)is the critical overlap concentration)in the range of *** formation can be categorized into three distinct regimes:(1)c/c^(*)2.0,no ***,an inertial-capillary balance led to the 2/3-power scaling of the minimum radius with time for the solutions of c/c^(*)weissenberg number was higher than the critical value of 0.5,indicating that the polymer chains underwent coil-stretch *** viscoelastic-capillary balance dominated instead of the inertial-capillary *** resulting viscoelastic resistance reduced the length of the ligament and increased the velocity difference between the satellite and main ***,a single droplet was *** addition,the law can be successfully generalized to various molecular weights,molecular structures and solvents.

关键词： Inkjet printing Single droplet Satellite droplet Viscoelasticity Coil-stretch

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Zeolite-confined Fe-site Catalysts for the Hydrogenation of CO_(2) to Produce High-value Chemicals

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Chemical Research in Chinese Universities 2024年第1期40卷 78-95页

作者： han Xiaoyang XIA Huicong TU weifeng wei Yifan XUE Dongping LI Minhan YAN Wenfu ZhanG Jia-Nan han Yi-Fan College of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001P.R.China State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou UniversityZhengzhou450001P.R.China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou450001P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry and College of Chemistry Jilin UniversityChangchun130012P.R.China State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai200237P.R.China

Zeolite-confined Fe-site catalysts(ZFCs)have emerged as superior materials for sustainably producing high-value chemicals through CO_(2) hydrogenation,owing to their adaptable framework,customizable composition,and thermal *** excel in activating,adsorbing,and converting CO_(2) with remarkable efficiency and consistency in *** has sparked a surge in research interest in recent *** review delves into the latest advancements in CO_(2) catalytic hydrogenation to olefins,alcohols,aromatics,and other liquid hydrocarbons,examining the synthesis,modification tactics,and the correlation between structure and performance across various ***,it underscores the pivotal factors affecting performance and sheds light on the mechanisms behind selectivity control in the CO_(2) hydrogenation process facilitated by *** conclude,it presents pressing challenges and strategic recommendations to inspire the development of high-performance,durable ZFCs for CO_(2) hydrogenation applications.

关键词： Zeolite-confined Fe-site catalyst CO_(2) hydrogenation Modification strategy High-value chemical

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Deep learning-based modeling method for probabilistic LCF life prediction of turbine blisk

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Propulsion and Power Research 2024年第1期13卷 12-25页

作者： Cheng-wei Fei Yao-Jia han Jiong-Ran Wen Chen Li Lei han Yat-Sze Choy Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHong Kong 999077China

Turbine blisk is one of the typical components of gas turbine *** fatigue life of turbine blisk directly affects the reliability and safety of both turbine blisk and aeroengine *** monitor the performance degradation of an aeroengine,an efﬁcient deep learning-based modeling method called convolutional-deep neural network(C-DNN)method is proposed by absorbing the advantages of both convolutional neural network(CNN)and deep neural network(DNN),to perform the probabilistic low cycle fatigue(LCF)life prediction of turbine blisk regarding uncertain influencing *** the C-DNN method,the CNN method is used to extract the useful features of LCF life data by adopting two convolutional layers,to ensure the precision of C-DNN *** two close-connected layers in DNN are employed for the regression modeling of aeroengine turbine blisk LCF life,to keep the ac-curacy of LCF life *** the probabilistic analysis of turbine blisk and the com-parison of methods(ANN,CNN,DNN and C-DNN),it is revealed that the proposed C-DNN method is an effective mean for turbine blisk LCF life prediction and major factors affecting the LCF life were gained,and the method holds high efﬁciency and accuracy in regression modeling and *** study provides a promising LCF life prediction method for complex structures,which contribute to monitor health status for aeroengines operation.

关键词： Convolutional-deep neural network Low cycle fatigue Life prediction Turbine blisk Probabilistic prediction

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Combinations of electron and proton donors in transition-metal complex mediated nitrogen reduction reactions

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Science China Chemistry 2024年第7期67卷 2136-2154页

作者： Delong han Li Yang Hao Huang Priyanka Chakraborty Shashikant U.Dighe Kuo-wei Huang KAUST Catalysis Center and Division of Physical Science and Engineering King Abdullah University of Science and TechnologyThuwal 23955Saudi Arabia Agency for Science Technologyand ResearchInstitute of Materials Research and Engineering and Institute of Sustainability for ChemicalsEnergy and EnvironmentSingapore 138634Singapore

Nitrogen fixation is a complex process involving the transfer of six electrons and *** from the conventional Haber-Bosch process,which relies on hydrogen(H_(2))to provide both electrons and protons to reduce nitrogen(N_(2)),homogeneous transition metal complex-catalyzed N_(2)reduction reactions(NRR)employ an array of electron and proton donors or even electron donors combined with *** the synthesis of diverse catalytic progress,the categories of donors have seen rapid ***,existing literature only provides summaries regarding the metal,ligands,and *** the significance of electron and proton donor combinations in nitrogen reduction reactions,no literature has thoroughly reviewed this ***,we hereby compiled a comprehensive list of commonly used reagents in N_(2)reduction and classified them according to their specific donor *** review presents clear and organized information about these combinations,along with a summary of their general performance trend in NRR with related ***,we conclude the discussion by highlighting key points for researchers to consider when selecting catalysts and donor combinations,with the ultimate goal of advancing the field of nitrogen fixation.

关键词： dinitrogen reduction reaction reducing donor combination transition metal complexes homogeneous catalysis

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Enhanced energy storage properties and good stability of novel(1-x)Na_(0.5)Bi_(0.5)TiO_(3)-xCa(Mg_(1/3)Nb_(2/3))O_(3) relaxor ferroelectric ceramics prepared by chemical modification

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Journal of Materiomics 2024年第4期10卷 770-782页

作者： Ying Zhang Meng-han Yan Zhi-Fei Zhang Hai-Rui Bai Peng Li wei-Fang han Ji-Gong Hao wei Li Yu-Chao Li Chun-Ming Wang Peng Fu School of Materials Science and Engineering Liaocheng UniversityLiaocheng252059China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing 300 Changjiang RoadYantai264006China School of Physics Shandong UniversityJinan250100China

The increase in energy consumption and its collateral damage on the environment has encouraged the development of environment-friendly ceramic materials with good energy storage *** this work,(1-x)Na_(0.5)Bi_(0.5)TiO_(3)-xCa(Mg_(1/3)Nb_(2/3))O_(3) ceramics were synthesized by the solid-state reaction *** 0.88Na_(0.5)Bi_(0.5)TiO_(3)-0.12Ca(Mg_(1/3)Nb_(2/3))O_(3) ceramic exhibited a high recoverable energy storage density of 8.1 J/cm3 and energy storage efficiency of 82.4% at 550 kV/*** introduction of Ca(Mg_(1/3)Nb_(2/3))O_(3) reduced the grain size and increased the band gap,thereby enhancing the breakdown field strength of the ceramic *** method also resulted in good temperature stability(20–140℃),frequency stability(1–200 Hz),and fatigue stability over 106 *** addition,an ultrahigh power density of 187 MW/cm^(3) and a fast charge-discharge rate(t0.9=57.2 ns)can be obtained *** element method analysis revealed that the decrease of grain size was beneficial to the increase of breakdown field ***,the 0.88Na_(0.5)Bi_(0.5)TiO_(3)-0.12Ca(Mg_(1/3)Nb_(2/3))O_(3) ceramics resulted in high energy storage properties with good stability and were promising environment-friendly materials for advanced pulsed power systems applications.

关键词： (1-x)Na_(0.5)Bi_(0.5)TiO_(3)-xCa(Mg_(1/3)Nb_(2/3))O_(3)ceramics Relaxor ferroelectrics Breakdown field strength Energy storage properties Stability

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用平面六边形割角的细分曲面生成方法

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计算机学报 2024年第7期47卷 1615-1639页

作者：韩臻北京交通大学计算机科学与技术学院北京100044

平面六边形是一种更契合自然并具有独特优点的多边形,找到一种方便实用的平面六边形细分格式是细分曲面研究领域中的基础工作之一。本文提出了一种平面六边形细分方法,对任意初始凸多面体网格,只用平面六边形进行割角细分,可以使得细分... 详细信息

平面六边形是一种更契合自然并具有独特优点的多边形,找到一种方便实用的平面六边形细分格式是细分曲面研究领域中的基础工作之一。本文提出了一种平面六边形细分方法,对任意初始凸多面体网格,只用平面六边形进行割角细分,可以使得细分曲面光滑、保凸、具有插值性质,且细分过程中新增的面片都是平面六边形.我们将该方法简称为平面蜂窝细分.论文给出了平面蜂窝细分的拟线性四点格式几何规则及其细分矩阵,其几何意义直观,相应的算法简单、可行且数值稳定.论文分析了细分曲面的收敛性和光滑性,给出了C光滑性条件及其证明.为了提高细分曲面的光滑性,传统的方法是使边数不同的多边形面片按等比例收缩,该方法对于平面蜂窝细分没有预期效果并且无法处理三角形特殊面;论文给出了一种新方法,获得的割角参数使得细分曲面更加光滑,且可以统一处理三角形、四边形等特殊面,从而避免特殊点/面带来的局限性.论文还提出了平面蜂窝细分方法的一种推广和一种自然边界处理方法,并讨论了平直边界和退化情形下尖锐特征生成的方式,可用于细分任意可定向初始网格.文中给出了一些细分曲面的例子,并与经典的细分方法进行了比较,验证了新方法的有效性和具有的优点.

关键词：细分曲面六边形网格平面六边形保凸割角割角参数特殊点/面

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Effect of heat treatment on microstructural evolution,mechanical properties and tribological properties of H13 steel prepared using selective laser melting

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Journal of Iron and Steel Research International 2024年第5期31卷 1246-1259页

作者： Li-xiong han Yan Wang Shi-feng Liu Zhao-hui Zhang wei Liu Xin Yang Dang-shen Ma Jian Zhou Ying-kang wei College of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Zhejiang University City College Hangzhou310015ZhejiangChina China Iron and Steel Research Institute Group Co. Ltd.Beijing100081China

H13 tool steel was successfully prepared by selective laser melting(SLM)*** effects of heat treatment on the microstructure,mechanical properties,and tribological properties of SLMed H13 steel were *** heat treatment process involved a solution treatment and a double aging treatment of the deposited H13 tool steel prepared by *** aim is to optimize the microstructure and mechanical properties of SLMed H13 *** to the rapid heating and cooling effects of SLM,carbide precipitation in the deposited H13 steel was not uniform and residual stresses were *** purpose of the solution treatment is to dissolve the solution at a high temperature to eliminate the residual stresses and defects introduced by the SLM-forming *** solution treatment and first aging treatment produced the precipitation of small carbides at the grain boundaries and inside the crystals,which increased the hardness of SLMed H13 *** hardness increased from 538±4.0 HV of the as-deposited sample to 548±5.8 HV of samples after the first aging ***,the ultimate tensile strength and the elongation at break decreased from 1882 MPa and 11.5%in the as-deposited sample to 1697 MPa and 7.9%in those after the first aging treatment,***,the friction coefficient and wear rate in the as-deposited sample decreased from 0.5160 and 2.36×10^(–6)mm^(−3)N^(−1)m^(−1)to 0.4244 and 1.04×10^(–6)mm^(−3)N^(−1)m^(−1),***,the distribution of carbides inside the crystals was not *** second aging treatment adjusted the morphology of carbide precipitation and made it more uniform,but the precipitation of carbides grew and settled at the bottom of the grain *** hardness decreased to 533±6.7 HV compared with that with the first aging treatment,but the ultimate tensile strength and plasticity reached a balance(1807 MPa,14.05%).Accordingly,the friction coefficient and wear rate also showed a stable and decreasin

关键词： Selective laser melting H13 steel Solution aging Double aging Friction and wear Retained austenite

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Energy saving analysis for CO_(2)–O_(2)mixed injection technology in converter steelmaking

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Journal of Iron and Steel Research International 2024年第5期31卷 1095-1103页

作者： Bao-chen han Chun-liang Gao Ya-qiang Li Dan Liu Guang-sheng wei Rong Zhu Hebei Key Laboratory of Material Near-Net Forming Technology School of Material Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018HebeiChina Department of Automotive Engineering Hebei Vocational University of Technology and EngineeringXingtai054000HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

Energy-saving in China's iron and steel industry still relies on the development and improvement of short-term energy saving ***,a special converter smelting technology incorporating energy saving was *** evaluate the energy-saving potential of the CO_(2)–O_(2)mixed injection(COMI)technology,collected production data were used to develop an improved techno-economic *** reveal that the technology can save energy through auxiliary material consumption,sensible heat of solid by-product,iron loss reduction,and energy *** application of COMI technology in an enterprise is cost effective,involving the energy saving potential of 0.206 GJ/t,the cost of conserved energy of−48.83 yuan/GJ,and a simple payback period of 0.35 year for a 60-million-yuan *** analysis shows that the investment cost and discount rate primarily influence the cost of conserved energy of the *** the discount rate increased,the cost of conserved energy also gradually ***,the COMI technology is an energy-saving technology with good development prospects.

关键词： Converter steelmaking COMI technology Energy saving Techno-economic model Investment cost

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