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Pressure transient characteristics of non-uniform conductivity fractured wells in viscoelasticity polymer flooding based on oil-water two-phase flow

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Petroleum Science 2024年第1期21卷 343-351页

作者： yang Wang jia Zhang Shi-Long yang Ze-xuan xu Shi-Qing Cheng National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

Polymer flooding in fractured wells has been extensively applied in oilfields to enhance oil *** contrast to water,polymer solution exhibits non-Newtonian and nonlinear behavior such as effects of shear thinning and shear thickening,polymer convection,diffusion,adsorption retention,inaccessible pore volume and reduced effective ***,the flux density and fracture conductivity along the hydraulic fracture are generally non-uniform due to the effects of pressure distribution,formation damage,and proppant *** this paper,we present an oil-water two-phase flow model that captures these complex non-Newtonian and nonlinear behavior,and non-uniform fracture characteristics in fractured polymer *** hydraulic fracture is firstly divided into two parts:high-conductivity fracture near the wellbore and low-conductivity fracture in the far-wellbore section.A hybrid grid system,including perpendicular bisection(PEBI)and Cartesian grid,is applied to discrete the partial differential flow equations,and the local grid refinement method is applied in the near-wellbore region to accurately calculate the pressure distribution and shear rate of polymer *** combination of polymer behavior characterizations and numerical flow simulations are applied,resulting in the calculation for the distribution of water saturation,polymer concentration and reservoir *** with the polymer flooding well with uniform fracture conductivity,this non-uniform fracture conductivity model exhibits the larger pressure difference,and the shorter bilinear flow period due to the decrease of fracture flow ability in the far-wellbore *** field case of the fall-off test demonstrates that the proposed method characterizes fracture characteristics more accurately,and yields fracture half-lengths that better match engineering reality,enabling a quantitative segmented characterization of the near-wellbore section with high fracture conductivity and th

关键词： Polymer flooding Non-Newtonian fluid Non-uniform fracture conductivity Two-phase flow Pressure transient analysis

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基于WinSock DLL的网络安全检测方法研究

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微机发展 2002年第1期12卷 2-4页

作者：许佳森杨传斌浙江师范大学计算机系浙江金华321004

指出了Windows环境下存在的网络安全问题 ,提出了采用WindowsSocketsDLL来监控网络安全的方法。

关键词： Winsock DLL 安全检测网络安全计算机网络

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光缆接头盒密封性智能监测系统的实现

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电力信息与通信技术 2016年第10期14卷 80-84页

作者：谢明海徐律佳杨乐祥李有超绍兴大明电力设计院浙江绍兴312000 国网绍兴供电公司浙江绍兴312000

一条光缆通信线路往往是由多段光缆通过光缆接头盒连接而成,接头盒若因密封不良进水会降低光缆的传输性能,因此需要及时发现并消除光缆接头盒密封性的故障隐患。文章提出了一种光缆接头盒密封性智能监测系统的实现方法,包括硬件组成、... 详细信息

一条光缆通信线路往往是由多段光缆通过光缆接头盒连接而成,接头盒若因密封不良进水会降低光缆的传输性能,因此需要及时发现并消除光缆接头盒密封性的故障隐患。文章提出了一种光缆接头盒密封性智能监测系统的实现方法,包括硬件组成、数据处理的原理和判据。智能监测系统通过数据采集、传送以及后台数据中心智能化处理,能快速发现光缆接头盒的故障隐患,在故障发生前加以排除,有助于提高光缆通信的整体可靠性。

关键词：光缆接头盒密封性智能监测系统

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Effects of d-Phenylalanine as a biocide enhancer of THPS against the microbiologically influenced corrosion of C1018 carbon steel

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Journal of Materials Science & Technology 2019年第1期35卷 109-117页

作者： Jin xu Ru jia Dongqing yang Cheng Sun Tingyue Gu Department of Chemical and Biomolecular Engineering Institute for Corrosion and Multiphase Technology Ohio University Environmental Corrosion Center Institute of Metal Research Chinese Academy of Sciences

Microbiologically influenced corrosion(MIC) is caused by biofilms such as those of sulfate reducing bacteria(SRB). To mitigate MIC, biocide treatment is often needed. Tetrakis(hydroxymethyl) phosphonium sulfate(THPS) is an environmentally friendly biocide that is often used in the oil and gas industry. However, its prolonged use leads to biocide resistance, leading to dosage escalation. A biocide enhancer can be used to slow down the trend. In recent years, d-amino acids have been investigated as an enhancer for THPS and other biocides. Published works used anaerobic vials and flow devices, which could not reveal the real-time changes of the biocide treatment on corrosion. In this work, it was proven that the biocide enhancement effects of d-Phenylalanine(d-Phe) on THPS against the Desulfovibrio vulgaris biofilm on C1018 carbon steels could be assessed in real time using linear polarization resistance and electrochemical impedance spectroscopy to collaborate sessile cell count, weight loss and pitting depth data. The results showed that 500 ppm(w/w) d-Phe effectively enhanced 80 ppm THPS against MIC by the D. vulgaris(a corrosive SRB) biofilm. The sessile cell count and pit depth were all reduced with the enhancement of d-Phe.

关键词： D-amino acid THPS SRB Corrosion Biofilm

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烤烟烟叶感官质量与风格特征的相关性分析

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江西农业学报 2023年第11期35卷 7-12页

作者：王航许自成韩云龙钱建财朱海波许嘉阳贾玮张莉河南农业大学烟草学院河南郑州450046 江苏中烟工业有限责任公司江苏南京210009 河南农业大学资源与环境学院河南郑州450046

以我国云南、河南、贵州、四川等烟区烤烟样品为试验材料,对54个C3F等级烟叶的香气特性、口感特性和风格特征等感官评吸质量指标进行了量化评价,并运用简单相关、典型相关和逐步回归分析等统计方法对感官质量与风格特征各指标间的相关... 详细信息

以我国云南、河南、贵州、四川等烟区烤烟样品为试验材料,对54个C3F等级烟叶的香气特性、口感特性和风格特征等感官评吸质量指标进行了量化评价,并运用简单相关、典型相关和逐步回归分析等统计方法对感官质量与风格特征各指标间的相关性进行了分析。简单相关分析和典型相关分析结果表明,感官质量各指标与风格彰显程度、浓度和劲头存在极显著或显著相关关系。逐步分析结果表明,透发性和杂气是风格彰显程度的主要影响因子,其量化关系式为Y_(1)=0.551X_(3)+0.770X4-1.905,达极显著水平;透发性是浓度的主要影响因子,其量化关系式为Y_(2)=0.605X_(3)+2.612,达极显著水平;透发性、香气量和余味是劲头的主要影响因子,其量化关系为Y_(3)=0.536X_(3)-0.610X7+0.426X_(2)+3.959,达极显著水平。综上,通过感官质量指标来预测烟叶的风格特征,对于烟叶质量评价体系的构建有一定的参考意义。

关键词：烤烟感官质量风格特征典型相关分析逐步回归分析

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Geohazards and risk assessment along highway in Sichuan Province, China

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Journal of Mountain Science 2023年第6期20卷 1695-1711页

作者： yang Hong-zhi DONG jia-yu GUO xu-liang School of Highway Chang’an UniversityXi'an 710064China

Geohazards along highways are the main natural hazards that could affect the safety and operation of highway *** the risks faced by highways in areas affected by geohazards is an urgent problem to be *** study used historical geohazard events from Sichuan Province and highway network data to propose a geohazard risk index that reflects the risk geohazards along ***,this work applied the entropy method and expert scoring to calculate the weight of the *** spatial distributions of landslides,debris flows,collapses,and unstable slopes along the highways were analysed based on ArcGIS spatial statistics,and the highway geohazard intensity index were *** relationships between slope,rainfall,vegetation coverage,rock type,land use,and incision depth with geohazards were analysed,and the highway geohazard susceptibility index was calculated by the weighted information *** on the intensity and susceptibility index,we obtained a geohazard risk index which can better evaluate the risk of highways,and made a highway geohazard risk map to aid the prevention and mitigation of geohazards along highways and assist with highway network planning.

关键词： Geohazards Highway network Geohazard risk index Intensity index Susceptibility

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Crowd-Guided Entity Matching with Consolidated Textual Data

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Journal of Computer Science & Technology 2017年第5期32卷 858-876页

作者： Zhi-xu Li Qiang yang An Liu Guan-Feng Liu jia Zhu jia-Jie xu Kai Zheng Min Zhang School of Computer Science and Technology Soochow University Suzhou 215006 China Guangdong Key Laboratory of Big Data Analysis and Processing Guangzhou 510006 China School of Computer Science and Technology Soochow University Suzhou 215006 China School of Computer South China Normal University Guangzhou 510631 China School of Computer Science and Technology Soochow University Suzhou 215006 China Beijing Key Laboratory of Big Data Management and Analysis Methods Beijing 100872 China

Entity matching (EM) identifies records referring to the same entity within or across databases. Existing methods using structured attribute values (such as digital, date or short string values) may fail when the structured information is not enough to reflect the matching relationships between records. Nowadays more and more databases may have some unstructured textual attribute containing extra consolidated textual information (CText) of the record, but seldom work has been done on using the CText for EM. Conventional string similarity metrics such as edit distance or bag-of-words are unsuitable for measuring the similarities between CText since there are hundreds or thousands of words with each piece of CText, while existing topic models either cannot work well since there are no obvious gaps between topics in CText. In this paper, we propose a novel cooccurrence-based topic model to identify various sub-topics from each piece of CText, and then measure the similarity between CText on the multiple sub-topic dimensions. To avoid ignoring some hidden important sub-topics, we let the crowd help us decide weights of different sub-topics in doing EM. Our empirical study on two real-world datasets based on Amzon Mechanical Turk Crowdsourcing Platform shows that our method outperforms the state-of-the-art EM methods and Text Understanding models.

关键词： entity matching consolidated textual data crowdsourcing

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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Investigating Müller glia reprogramming in mice: a retrospective of the last decade, and a look to the future

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Neural Regeneration Research 2025年第4期20卷 946-959页

作者： Zhiyuan Yin jiahui Kang xuan Cheng Hui Gao Shujia Huo Haiwei xu Key Lab of Visual Damage and Regeneration&Restoration of Chongqing Southwest Eye HospitalSouthwest HospitalThird Military Medical University(Army Medical University)ChongqingChina

Müller glia,as prominent glial cells within the retina,plays a significant role in maintaining retinal homeostasis in both healthy and diseased *** lower vertebrates like zebrafish,these cells assume responsibility for spontaneous retinal regeneration,wherein endogenous Müller glia undergo proliferation,transform into Müller glia-derived progenitor cells,and subsequently regenerate the entire retina with restored ***,Müller glia in the mouse and human retina exhibit limited neural reprogramming.Müller glia reprogramming is thus a promising strategy for treating neurodegenerative ocular disorders.Müller glia reprogramming in mice has been accomplished with remarkable success,through various *** in molecular,genetic,epigenetic,morphological,and physiological evaluations have made it easier to document and investigate the Müller glia programming process in ***,there remain issues that hinder improving reprogramming efficiency and ***,understanding the reprogramming mechanism is crucial toward exploring factors that will improve Müller glia reprogramming efficiency,and for developing novel Müller glia reprogramming *** review describes recent progress in relatively successful Müller glia reprogramming *** also provides a basis for developing new Müller glia reprogramming strategies in mice,including epigenetic remodeling,metabolic modulation,immune regulation,chemical small-molecules regulation,extracellular matrix remodeling,and cell-cell fusion,to achieve Müller glia reprogramming in mice.

关键词： cell fusion chemical small-molecules epigenetic extracellular matrix immune metabolic mice Müller glia neurodegenerative diseases reprogramming retina regeneration

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某特高压调相机Bently3500系统轴振测点异常分析与处理

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电气开关 2023年第2期61卷 96-100页

作者：徐嘉阳潘青松李志强姚洁国家电网有限公司特高压建设分公司北京100053 中国葛洲坝集团电力有限责任公司湖北武汉430000

某特高压调相机Bently3500系统出现轴振测点不稳定现象。通过分析轴振信号传输路径、电缆屏蔽层对地电阻、延伸电缆检查、转接头插拔测试、振动检测装置校验和脏污测试等方式进行原因排查分析与故障定位,最终确认延伸电缆接头处存在污物... 详细信息

某特高压调相机Bently3500系统出现轴振测点不稳定现象。通过分析轴振信号传输路径、电缆屏蔽层对地电阻、延伸电缆检查、转接头插拔测试、振动检测装置校验和脏污测试等方式进行原因排查分析与故障定位,最终确认延伸电缆接头处存在污物,造成传感器电缆转接头不可靠接触,是导致此次轴振测点信号不稳定的原因。针对上述问题提出相应分析思路和优化方案,旨在杜绝类似事件发生,望给各参建单位提供参考。

关键词：调相机轴振延伸电缆保护逻辑

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