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Petroleum Science 2022年第2期19卷 678-687页

作者： Guo-Shuai Ju Tie Yan Xiao-Feng Sun jing-yu qu Qiao-Bo Hu College of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangPeople's Republic of China

With ongoing development of oil exploration and techniques,there is a significant need for improved well control strategies and formation pressure prediction *** this paper,a gas-liquid transient drift flow model was established according to the gas-liquid two-phase flow characteristics during the gas kick.A Roe scheme was used for numerical calculation based on the finite volume *** changes of bottom-hole pressure,casing pressure,the development law of cross-sectional gas holdup,and gas velocity,along with the vertical well depth,were analyzed through simulation *** time-series characteristics of mud pit gain were obtained by adjusting the formation *** complex nonlinear mapping relationship between the formation parameters and the mud pit gain was *** long short-term memory network(LSTM)of deep learning was used to obtain a formation pressure inversion when the blowout is out of control and the well cannot be *** data from a well were used to verify the gas-liquid two-phase transient drift flow model based on the finite volume method,demonstrating that this method is reliable,with greatly improved prediction *** approach provides theoretical support for the early monitoring of gas kick during drilling,and for well-killing design and construction after uncontrolled blowout.

关键词： Gas kick Formation pressure Multiphase flow Computational model Long short-term memory

Cu(In,Ga)Se2 absorbers prepared by electrodeposition for low-cost thin-film solar cells

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Rare Metals 2017年第9期36卷 729-736页

作者： jing-yu qu Zheng-Fei Guo Kun Pan Wei-Wei Zhang Xue-Jin Wang College of Science China Agricultural UniversityBeijing 100083China

Reducing the manufacturing cost of solar cells is necessary to their industrial production. Electrodepositing is an effective, non-vacuum method which is very suitable for cutting the manufacturing cost of thin films as well as developing its large-scale industrial production. In this study, about 1-μm-thick Cu（In,Ga）Se2（CIGS） precursors were electrodeposited on Mo/glass substrates in aqueous solution utilizing a three-electrode potentiostatic *** was used as complexing agent, and all parameters of electrodeposition were precisely *** that, the electrodeposited precursors were selenized in a Se atmosphere with different heating ramp rates（60 and 600℃·min^（-1））. High-quality CIGS films were obtained, and their characteristics were investigated by X-ray fluorescence, scanning electron microscopy, energydispersive spectroscopy, X-ray diffraction, Raman spectra and near-infrared-visible（NIR-Vis） spectra. The results reveal that there are many differences between the properties of the films under different heating rates. Finally,CIGS solar cells were fabricated using a fast and a slow heating rate. The maximum efficiencies achieved for the films selenized at 60 and 600℃-min^（-1） are 3.15% and 0.71%, respectively.

关键词： Cu(In,Ga)Se2 Thin films Electrodeposition Selenization Heating rates

A novel predictive model of drag coefficient and settling velocity of drill cuttings in non-Newtonian drilling fluids

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Petroleum Science 2021年第6期18卷 1729-1738页

作者： Tie Yan jing-yu qu Xiao-Feng Sun Wei Li Ye Chen Qiao-Bo Hu College of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangPeople's Republic of China Sinopec Shale Gas Research Institute of Petro China Southwest Oil and Gas Field Chengdu610051SichuanPeople's Republic of China

In oil and gas well drilling operations,it is of great significance to accurately predict the drag coefficient and settling velocity of drill cuttings in non-Newtonian drilling *** this paper,the free-falling of 172 groups of spheres and 522 groups of irregular-shaped sand particles in Newtonian/non-Newtonian fluids were investigated *** was found that the drag coefficient calculated based on Newtonian correlations can result in a significant error when the particle settles in the non-Newtonian ***,predictive models of drag coefficient were established respectively for different types of *** validity of the proposed drag coefficient model of spheres was verified by comparing it with the previous *** this basis,the drag coefficient model of irregular-shaped sand particles was established by introducing a shape *** models do not use the shape factor that requires detailed threedimensional shape and size ***,two-dimensional geometric information(circularity)is obtained via image analysis *** present new models predict the settling velocity of sand particles in the power-law fluid and Herschel-Bulkley fluid accurately with a mean relative error of5.03%and 6.74%,respectively,which verifies the accuracy of the model.

关键词： Drag coefficient Settling velocity Non-Newtonian fluid Drill cuttings Hole cleaning

退火条件对电沉积制备铜铟镓硒薄膜品质的影响（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第5期19卷 399-408页

作者： jing-yu qu Zheng-fei GUO Kun PAN Wei-wei ZHANG Xue-jin WANG College of Science China Agricultural University

目的:退火条件直接影响着电沉积制备的铜铟镓硒薄膜品质,而薄膜品质决定着最终得到器件的转换效率。本实验在不同退火条件下对薄膜进行处理,得出退火条件对薄膜各项表征指标的影响规律,并根据观察到的规律改善退火工艺,以提高铜铟镓硒... 详细信息

目的:退火条件直接影响着电沉积制备的铜铟镓硒薄膜品质,而薄膜品质决定着最终得到器件的转换效率。本实验在不同退火条件下对薄膜进行处理,得出退火条件对薄膜各项表征指标的影响规律,并根据观察到的规律改善退火工艺,以提高铜铟镓硒薄膜品质。创新点:目前利用水溶液电沉积制备的铜铟镓硒薄膜太阳能电池转换效率不高,而退火是制作此电池的关键步骤之一。本文研究了退火温度和升温速率对薄膜品质的影响,分析其可能原因及退火过程发生的反应,并制备出了理想的高品质薄膜。方法:1.在水溶液中利用电沉积法制备出铜铟镓硒薄膜前驱体。2.对前驱体进行退火处理,并针对不同的样品采用不同的退火温度和升温速率。3.利用X射线衍射(XRD)、拉曼光谱(Raman)、扫描电子显微镜(SEM)、X射线荧光光谱(XRF)对薄膜进行表征,分析不同退火条件对结果的影响规律。结论:1.退火温度的影响:退火温度由450°C升高到580°C时,得到的薄膜结晶性越来越好,晶粒边界越来越不明显,Cu/(In+Ga)的比例逐渐升高,说明高温下(≥450°C)金属铟和镓较易挥发;实验中还发现Cu-Se化合物的总含量随退火温度的升高而降低。2.升温速率的影响:退火速率越高,薄膜结晶性越好;快速升温时薄膜中Cu/(In+Ga)的比例略低于慢速升温时的样品,而Ga/(In+Ga)的比例几乎不变,说明快速升温可以减少In和Ga的挥发。

关键词：铜铟镓硒薄膜电沉积退火条件拉曼光谱

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑yuan yu jing Wu Guang Yin Fan‑Zhen Jiao Zhong‑Zhen yu Jin qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

Boosting bidirectional sulfur conversion enabled by introducing boron-doped atoms and phosphorus vacancies in Ni2P for lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 760-769页

作者： Lin Peng yu Bai Hang Li Meixiu qu Zhenhua Wang Kening Sun Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing Key Laboratory of Chemical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

Lithium-sulfur （Li-S） batteries have gained great attention due to the high theoretical energy density and low cost,yet their further commercialization has been obstructed by the notorious shuttle effect and sluggish redox ***,we supply a strategy to optimize the electron structure of Ni2P by concurrently introducing B-doped atoms and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional sulfur *** study indicates that the simultaneous introduction of B-doped atoms and P vacancies in Ni2P causes the redistribution of electron around Ni atoms,bringing about the upward shift of d-band center of Ni atoms and effective d-p orbital hybridization between Ni atoms and sulfur species,thus strengthening the chemical anchoring for lithium polysulfides （LiPSs） as well as expediting the bidirectional conversion kinetics of sulfur ***,theoretical calculations reveal that the incorporation of B-doped atoms and P vacancies in Ni2P selectively promotes Li2S dissolution and nucleation ***,the Li-S batteries with Vp-B-Ni2P-separators present outstanding rate ability of 777 m A h g-1at 5 C and high areal capacity of 8.03 mA h cm-2under E/S of 5μL mg-1and sulfur loading of 7.20 mg *** work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulfur conversion.

关键词： Lithium sulfur batteries

Unraveling brain aging through the lens of oral microbiota

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Neural Regeneration Research 2025年第7期20卷 1930-1943页

作者： Qinchao Hu Si Wang Weiqi Zhang jing qu Guang-Hui Liu State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical UniversityBeijingChina CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijingChina University of Chinese Academy of Sciences BeijingChina Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijingChina Aging Biomarker Consortium BeijingChina State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina

The oral cavity is a complex physiological community encompassing a wide range of *** of oral microbiota can lead to various oral infectious diseases,such as periodontitis and tooth decay,and even affect systemic health,including brain aging and neurodegenerative *** studies have highlighted how oral microbes might be involved in brain aging and neurodegeneration,indicating potential avenues for intervention *** this review,we summarize clinical evidence demonstrating a link between oral microbes/oral infectious diseases and brain aging/neurodegenerative diseases,and dissect potential mechanisms by which oral microbes contribute to brain aging and *** also highlight advances in therapeutic development grounded in the realm of oral microbes,with the goal of advancing brain health and promoting healthy aging.

关键词： Alzheimer's disease brain aging multiple sclerosis neurodegeneration neurodegenerative diseases oral microbiota Parkinson's disease periodontitis bacteria Porphyromonas gingivalis

Bioinspired Ultrasensitive Flexible Strain Sensors for Real-Time Wireless Detection of Liquid Leakage

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NANO-MICRO LETTERS 2025年第1期17卷 1-18页

作者： Zhou, Weilong Du, yu Chen, Yingying Zhang, Congyuan Ning, Xiaowei Xie, Heng Wu, Ting Hu, Jinlian qu, Jinping Huazhong Univ Sci & Technol Sch Chem & Chem Engn Key Lab Mat Chem Energy Convers & Storage Minist EducHubei Key Lab Mat Chem & Serv Failure Wuhan 430074 Peoples R China Huazhong Univ Sci & Technol Hubei Engn Res Ctr Biomat & Med Protect Mat Sch Chem & Chem Engn Wuhan 430074 Peoples R China Wuhan Inst Technol Sch Mat Sci & Engn Wuhan 430205 Peoples R China City Univ Hong Kong Dept Biomed Engn Hong Kong 999077 Peoples R China

Micro-extrusion compression molding and surface modification were proposed for the mass fabrication of a superhydrophobic thermoplastic polyurethane sensor (TCGS).Inspired by scorpions, TCGS features Archimedean spiral crack arrays and micropores, achieving 218.13 sensitivity at 2% strain, a 4300% increase, and over 5000 usage cycles of *** robust superhydrophobicity of TCGS improves sensitivity and stability for detecting small-scale liquid leakage, allowing precise monitoring across various sizes and compositions while providing early warnings in various scenarios. Liquid leakage of pipeline networks not only results in considerable resource wastage but also leads to environmental pollution and ecological imbalance. In response to this global issue, a bioinspired superhydrophobic thermoplastic polyurethane/carbon nanotubes/graphene nanosheets flexible strain sensor (TCGS) has been developed using a combination of micro-extrusion compression molding and surface modification for real-time wireless detection of liquid leakage. The TCGS utilizes the synergistic effects of Archimedean spiral crack arrays and micropores, which are inspired by the remarkable sensory capabilities of scorpions. This design achieves a sensitivity of 218.13 at a strain of 2%, which is an increase of 4300%. Additionally, it demonstrates exceptional durability by withstanding over 5000 usage cycles. The robust superhydrophobicity of the TCGS significantly enhances sensitivity and stability in detecting small-scale liquid leakage, enabling precise monitoring of liquid leakage across a wide range of sizes, velocities, and compositions while issuing prompt alerts. This provides critical early warnings for both industrial pipelines and potential liquid leakage scenarios in everyday life. The development and utilization of bioinspired ultrasensitive flexible strain sensors offer an innovative and effective solution for the early wireless detection of liquid leakage.

关键词： Thermoplastic polyurethane Bioinspired Cracks Liquid leakage Flexible strain sensor

羟基磷灰石球形颗粒表面微形貌构建及其对干细胞生物学行为的调控

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无机材料学报 2017年第3期32卷 319-325页

作者：智伟匙峰李金雨周腾屈树新汪建新张聪翁杰西南交通大学材料科学与工程学院材料先进技术教育部重点实验室成都610031 中国人民解放军第309医院北京100091

通过调节溶胶-凝胶体系中羟基磷灰石(HA)粉末和甲壳素(Chitin)的质量比,制备具有不同表面微形貌的HA球形颗粒。扫描电子显微镜(SEM)表征结果显示:随着HA/Chitin质量比从4/1增加到35/1,球形颗粒的表面微形貌发生了明显变化,由粗糙渐趋平... 详细信息

通过调节溶胶-凝胶体系中羟基磷灰石(HA)粉末和甲壳素(Chitin)的质量比,制备具有不同表面微形貌的HA球形颗粒。扫描电子显微镜(SEM)表征结果显示:随着HA/Chitin质量比从4/1增加到35/1,球形颗粒的表面微形貌发生了明显变化,由粗糙渐趋平滑,微米级皱褶逐渐减少至消失,微孔隙率从(35%±0.8%)减少到(10.4%±0.7%)。体外细胞培养的结果表明具有微米级皱褶,微孔隙率较高的粗糙表面具有引导干细胞铺展和增殖的作用,微孔隙率低的平滑表面则具有引导干细胞轴向延伸及骨向分化的趋势。同时,HA球形颗粒表面微形貌对干细胞表面特征性抗原标志物的表达具有调控作用。

关键词：羟基磷灰石表面微形貌干细胞生物学行为

Statistical analysis on the validity of the cold plasma approximation for chorus waves based on Van Allen Probe observations and their effects on radiation belt electrons

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Earth and Planetary Physics 2025年第1期9卷 159-170页

作者： AoJun Ren Jiang yu jing Wang ZuZheng Chen XiaoMan Liu Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai Guangdong 519000China

Theoretical analysis has demonstrated that the dispersion relation of chorus waves plays an essential role in the resonant interaction and energy transformation between the waves and magnetospheric *** quantitative analyses often simplified the chorus dispersion relation by using the cold plasma ***,the applicability of the cold plasma assumption is doubtful,especially during geomagnetic *** here present a systematic statistical analysis on the validity of the cold plasma dispersion relation of chorus waves based on observations from the Van Allen Probes over the period from 2012 to *** statistical results show that the observed magnetic field intensities deviate substantially from those calculated from the cold plasma dispersion relation and that they become more pronounced with an increase in geomagnetic activity or a decrease in background plasma *** region with large deviations is mainly concentrated in the nightside and expands in both the radial and azimuthal directions as the geomagnetic activity increases or the background plasma density *** addition,the bounce-averaged electron scattering rates are computed by using the observed and cold plasma dispersion relation of chorus *** with usage of the cold plasma dispersion relation,usage of the observed dispersion relation considerably lowers the minimum resonant energy of electrons and lowers the scattering rates of electrons above tens of kiloelectronvolts but enhances those ***,these differences are more pronounced with the enhancement of geomagnetic activity or the decrease in background plasma density.

关键词： chorus waves cold plasma approximation dispersion relations scattering rates