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Laboratory study of the factors affecting hydraulic fracturing effect for inter-salt oil shale layers,Qianjiang Depression,China

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Petroleum Science 2023年第3期20卷 1690-1706页

作者： Jun zhou Guang-Ai Wu Ya-Nan Geng Yin-Tong Guo Xin Chang Cheng-Yong Peng Chuan-zhi Ai CN00C Research Institute Ltd. Bejing100028China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071Hubei China University of Chinese Academy of Sciences Beijing100049China

This study aims to investigate the potential factors affecting hydraulic fracturing of inter-salt oil shale reservoirs in the Qianjiang Depression,*** the inter-salt shale samples,the re-crystallization seepage tests,rock mechanical tests under high temperature and pressure,salt rock creep tests,and direct shear tests were *** testing results suggest several major factors that affect hydraulic fracturing effects in the ***,the seepage of reservoir and fracturing fluid through hydraulic frac-tures leads to salt dissolution and crystallization,reducing the effective seepage area of ***,the salt crystal may block the pore throats or micro fractures after brine invades the shale,decreasing the overall ***,the low strength and obvious plasticity of inter-salt shale and the strong creep characteristics of salt rock raise difficulties for proppant to effectively support fracture walls,thereby sharply narrowing the hydraulic fracture ***,the weak interfaces(bedding planes and lithology interfaces)in inter-salt oil shale reservoirs restrict the height of hydraulic fractures,resulting in the disconnection of seepage channels between multiple inter-salt shale ***,several factors together reduce reservoir permeability,weaken the fluid flow capacity in the fracture,narrow the fracture width,and limit the effective stimulation volume,resulting in weaken the effect hydraulic fracturing.

关键词： Shale oil Salt rock Qianjiang Depression Hydraulic fracturing Recrystallization

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基于泛在物联网的10 kV开关柜局放在线监测系统设计

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智能物联技术 2024年第2期56卷 81-84页

作者：周之松杨露马晴王雯艳陈俊宏西南油气田分公司四川成都610213

随着电力系统的现代化,10 kV开关柜的稳定运行对电网安全至关重要。局部放电作为一种常见的电力设备绝缘故障现象,其实时监测对预防电力事故具有重要意义。泛在物联网技术具有高效的数据处理能力,能够提升电力系统的可靠性和安全性。基... 详细信息

随着电力系统的现代化,10 kV开关柜的稳定运行对电网安全至关重要。局部放电作为一种常见的电力设备绝缘故障现象,其实时监测对预防电力事故具有重要意义。泛在物联网技术具有高效的数据处理能力,能够提升电力系统的可靠性和安全性。基于此,设计基于泛在物联网的10 kV开关柜局放在线监测系统,详细阐述系统的架构设计、实时数据采集方法、数据处理技术及调试流程。通过应用测试验证了系统设计的有效性和实用性,展示其在实际电力系统中的应用前景和潜在价值。

关键词：泛在物联网 10 kV开关柜在线监测系统

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Evolution of electromechanical properties in Fe-doped(Pb,Sr)(Zr,Ti)O_(3) piezoceramics

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Journal of Advanced Ceramics 2021年第3期10卷 587-595页

作者： Chuan CHEN Yan WANG Zong-Yue LI Chun LIU Wen GONG qing TAN Bing HAN Fang-zhou YAO Ke WANG Joint Laboratory of Electric Power Intelligent Sensing Technology and Application Department of Sensing Technology for Electric PowerGlobal Energy Interconnection Research Institute Co.Ltd.Future Science ParkBeijing 102209China China Aerospace Science and Industry Corporation Beijing 100048China Naqu Branch of Tibet Electric Limited Company Naqu 852000China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Center of Advanced Ceramic Materials and Devices Yangtze Delta Region Institute of Tsinghua UniversityZhejiang 314006China Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Department of Orthodontics&National Engineering Laboratory for Digital and Material Technology Peking University School and Hospital of StomatologyBeijing 100081China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049China Foshan(Southern China)Institute for New Materials Foshan 528200China

Defects in acceptor-doped perovskite piezoelectric materials have a significant impact on their electrical ***,the defect mediated evolution of piezoelectric and ferroelectric properties of Fe-doped(Pb,Sr)(Zr,Ti)O_(3)(PSZT-Fe)piezoceramics with different treatments,including quenching,aging,de-aging,and poling,was investigated *** vacancies with a cubic symmetry are preserved in the quenched PSZT-Fe ceramics,rendering them robust ferroelectric *** the aged PSZT-Fe polycrystals,defect dipole between Fe dopant and oxygen vacancy has the same orientation with spontaneous polarization Ps,which enables the reversible domain switching and hence leads to the emergence of pinched polarization hysteresis and recoverable strain *** the defect dipoles can be gradually disrupted by bipolar electric field cycling,once again endowing the aged materials with representative ferroelectric *** the poled PSZT-Fe polycrystals,the defect dipoles are reoriented to be parallel to the applied poling field,and an internal bias field aligning along the same direction emerges simultaneously,being responsible for asymmetric hysteresis loops.

关键词： lead-zirconate-titanate(PZT) piezoelectric acceptor defect engineering electromechanical properties

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Transformation and dissolution of second phases during solution treatment of an Al-Zn-Mg-Cu alloy containing high zinc

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Rare Metals 2018年第5期37卷 376-380页

作者： Kai Wen Bai-qing Xiong Yun-Qiang Fan Yong-An Zhang zhi-Hui Li Xi-Wu Li Feng Wang Hong-Wei Liu State Key Laboratory of Nonferrous Metals and Processes General Research Institute for Nonferrous MetalsBeijing 100088 China

The transformation and dissolution of Mg（Zn, Cu, Al）2 phase during solution treatment of an Al-Zn-Mg-Cu alloy containing high zinc were investigated by means of optical microscopy （OM）, scanning electron microscopy （SEM）, energy-dispersive X-ray spectrometry （EDX） and X-ray diffraction （XRD）. The results show that solution temperature is the main factor influencing phase dissolution. With solution temperature increasing, the content of residual phases decreases. Phase transformation from Mg（Zn, Cu, Al）2 to S（Al2CuMg） occurs under solution temperature of 450, 460 and 465 ℃. Mg（Zn, Cu, Al）2 phase is directly dissolved into the matrix under solution temperature of 470 and 475 ℃, and no S（Al2CuMg） phase transformed from Mg（Zn, Cu, Al）2 phase is observed. The formation of S（Al2CuMg） phase is mainly controlled by Zn elemental diffusion. The mechanism of transformation and dissolution of second phases was investigated. At low temperature, the dissolution of Zn is faster than that of Mg and Cu, resulting in an appropriate condition to form S（Al2CuMg） phase. At high temperature, the dissolution of main alloying elements has no significant barrier among them to form S（Al2CuMg） phase.

关键词： Al-Zn-Mg-Cu alloy Microstructure Solution treatment Phase transformation

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Gold Nanoparticles Based Colorimetric Detection of Target DNA After Loop-mediated Isothermal Amplification

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Chemical Research in Chinese Universities 2013年第3期29卷 424-428页

作者： zhou Chao MU Ying YANG Meng-chao WU qing-qing XU Wei ZHANG Ying JIN Wei SONG Qi WU Zhong-yu JIN Qin-han Research Center for Analytical Instrumentation Institute of Cyber-Systems and Control State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310058 P. R. China Central Laboratory Affiliated Hospital of Guiyang Medieal College Guiyang 550004 P. R. China School of Mathematics and Science Shijiazhuang University of Economics Shijiazhuang 050031 P. R. China

We have developed a rapid, simple and label-free colorimetric method for the identification of target DNA It is based on loop-mediated isothermal amplification（LAMP）. Plain gold nanoparticles（AuNPs） are used to indicate the occurrence of LAME The amplified product is mixed with AuNPs in an optimized ratio, at which the deoxyribonucleotides（dNTPs） bind to the AuNPs via ligand-metal interactions and thus enhance AuNPs stability. If a target DNA is amplified, the dramatic reduction of the dNTPs leads to the aggregation of AuNPs and a color change from red to blue. The success of the method strongly depends on the ionic strength of the solution and the initial concentration of dNTPs. Unlike other methods for the identification of isothermal products, this method is simple and can be readily applied on site where instrumentation is inadequate or even lacking.

关键词： Label-free Gold nanoparticle Loop-mediated isothermal amplification Naked eyes

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六西格玛方法论在降低机体铸造件不良率方面的应用

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铸造设备与工艺 2024年第1期 47-50,72页

作者：李锋宋学恩李文锋张敏之王庆泉潍柴重机股份有限公司山东潍坊261101

运用六西格玛DMAIC方法论,针对某机体铸件缺陷不良进行定义、测量、分析、改进和控制。通过具体全面的现状掌握、细致的测量系统分析、合理的分析及改进等系统性工具,最终显著降低了该机体的铸造不良率,有效提高了客户满意度,维护了品... 详细信息

运用六西格玛DMAIC方法论,针对某机体铸件缺陷不良进行定义、测量、分析、改进和控制。通过具体全面的现状掌握、细致的测量系统分析、合理的分析及改进等系统性工具,最终显著降低了该机体的铸造不良率,有效提高了客户满意度,维护了品牌形象。

关键词：六西格玛 DMAIC 不良率测量系统分析

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Simulation for accelerator dynamic power supply based on current-source PWMrectifier

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Radiation Detection Technology and Methods 2018年第2期2卷 133-139页

作者： Yang Li qing zhou Peng Liu Jing Zhang Fengli Long Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The booster power supply of high-energy photon source is dynamic power supply,and the output is 2-Hz bias sine ***-source rectifier(CSR)topology can achieve the 2-Hz current *** In order to get the output current and good power factor of the power grid,the algorithm of“indirect current control”is *** method needs to measure the voltage of three phases and calculates several certain parameters of the *** control strategy based on the“indirect current control”of the CSR is built in the Simulink simulation *** and algorithms are described in detail,and the control block diagram and simulation model are *** The control strategy can output the right current and make a good power factor in the side of *** The CSR topology,as a good choice of power supply of accelerator,has a well-researched prospect.

关键词： Dynamic power supply Current-source rectifier Indirect current control Power factor Simulink simulation

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Vapor-liquid equilibria of CH_4, CO_2 and their binary system CH_4 + CO_2: A comparison between the molecular simulation and equation of state

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Science China(Technological Sciences) 2015年第4期58卷 650-658页

作者： YANG zhi GONG Mao Qiong zhou Yuan DONG Xue Qiang LI Xiao Dong LI Hui Ya WU Jian Feng Key Laboratory of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences School of Energy and Power Engineering Beihang University

An accurate knowledge about phase behaviors of CH4, CO2 and their binary mixture is crucial in fields of natural gas liquefaction and refrigeration applications. In this work, two all-atom force fields of TraPPE-EH and EMP2 were used for the components CH4 and CO〉 respectively. Then the vapor-liquid equilibria （VLE） of CH4, CO2 and their binary system were calculated via the NVT- and NpT Gibbs Ensemble Monte Carlo Simulations. Meanwhile the traditional method using Equation of State （EoS） to correlate the VLE properties was also investigated. The EoSs considered in this work were three classic cubic RK, SRK, PR and another advanced molecular-based PC-SAFT equations. For pure components, both molecular simulations and the PC-SAFT EoS could obtain satisfactory predictions for all the saturated properties. However, the saturated liquid densities calculated by the cubic EoSs were not so good. It was also observed that the TraPPE-EH force field had a good representation for CH4 molecule, while the EMP2 force field was not enough accurate to represent CO2 molecules. For the mixture CH4 ＋ CO2, SRK and PR showed the best predictions for the saturated pressure-component property, while good results were also obtained via molecular simulations and PC-SAFT EoS. It was suggested that special combining rules or binary interaction parameters were important to obtain enough accurate prediction of the mixed phase behavior. Compared with the cubic EoS, the PC-SAFT and molecular simulation method showed better adaptabilities for both the pure and mixture systems. Besides, the accurate molecular parameters used in the PC-SAFT and molecular simulations could bring about direct and deep understanding about the molecular characteristics.

关键词： molecular simulation equation of state CH4 CO2 vapor-liquid equilibrium

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脾虚湿阻型银屑病病证结合小鼠模型的系统评价研究

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中药新药与临床药理 2024年第10期35卷 1470-1482页

作者：刘凡露苏浩杰周攀宇张雅婷汪晴孙玥岳洪宇吴晶晶危建安韩凌广州中医药大学第二临床医学院广东广州510006 省部共建中医湿证国家重点实验室(广州中医药大学第二附属医院) 广东广州510120 广州中医药大学东莞医院(东莞市中医院) 广东东莞523127 广东省中医证候临床研究重点实验室广东广州510120 粤港澳中医药与免疫疾病研究联合实验室广东广州510120

目的构建脾虚湿阻型银屑病小鼠模型,并从多维度、多方向评价该模型,以期为中医药治疗脾虚湿阻型银屑提供研究支持。方法采用高脂饮食喂养建立脾虚湿阻证小鼠模型,外涂咪喹莫特乳膏建立银屑病小鼠模型,并二者结合构建病证结合小鼠模型。... 详细信息

目的构建脾虚湿阻型银屑病小鼠模型,并从多维度、多方向评价该模型,以期为中医药治疗脾虚湿阻型银屑提供研究支持。方法采用高脂饮食喂养建立脾虚湿阻证小鼠模型,外涂咪喹莫特乳膏建立银屑病小鼠模型,并二者结合构建病证结合小鼠模型。比较体质量、进食量和饮水量,评价脾虚湿阻证候指征。比较皮损面积、PASI评分、经皮水分丢失值、HE染色下皮肤病理学改变评价银屑病严重程度。流式细胞术检测各类细胞表达情况,评价炎症程度。观察脂肪指数、肝脏HE染色下肝脏病理学变化、RT-q PCR法检测肝脏和附睾脂肪的相关因子m RNA表达水平、Western Blot法检测皮肤ABCA1蛋白表达水平,评价脂代谢紊乱情况。结果与寻常型银屑病组小鼠比较,脾虚湿阻型银屑病组小鼠体质量升高(P0.05)。结论脾虚湿阻型银屑病小鼠模型可作为可靠的病证结合动物模型,为进一步探讨中医药治疗脾虚湿阻型银屑病提供参考。

关键词：银屑病脾虚湿阻证病证结合动物模型小鼠

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室温快速自修复超疏水聚硅氧烷涂层制备及其自修复自清洁性能

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西南科技大学学报 2024年第2期39卷 1-7,47页

作者：刘丽莉周治白浩民林珂羽黄亚文西南科技大学材料与化学学院四川绵阳621010 西南科技大学环境友好能源材料国家重点实验室四川绵阳621010

赋予超疏水材料自修复的能力,可以改善材料性能,延长服役时间。将可逆动态亚胺键引入聚硅氧烷基体,制备了室温快速自修复的自清洁超疏水涂层。涂层的接触角154°,滚动角5°,在O_(2)等离子体刻蚀至表面接触角为0°之后,室温修复1 h即可... 详细信息

赋予超疏水材料自修复的能力,可以改善材料性能,延长服役时间。将可逆动态亚胺键引入聚硅氧烷基体,制备了室温快速自修复的自清洁超疏水涂层。涂层的接触角154°,滚动角5°,在O_(2)等离子体刻蚀至表面接触角为0°之后,室温修复1 h即可快速恢复超疏水特性,经6次损伤-修复循环后接触角依旧保持在150°以上。升高温度到80℃或者利用碳纳米管的光热效应还可实现涂层化学损伤10~20 min的超快修复。研究表明,构建100 nm/10μm微纳粗糙表面可赋予涂层超疏水特性,可逆动态亚胺键交换重组的化学修复与柔性分子链段运动翻转的物理修复共同作用是实现涂层室温快速自修复的关键。

关键词：超疏水涂层自修复能力聚硅氧烷亚胺键碳纳米管

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