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Experimental investigation on the enhanced oil recovery efficiency of polymeric surfactant: Matching relationship with core and emulsification ability

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Petroleum Science 2023年第1期20卷 619-635页

作者： Xin Chen Yi-Qiang Li Zhe-Yu Liu Japan Trivedi Wen-Bin Gao ming-yue sui State Key Laboratory of Oil and Gas Resources and Exploration School of Petroleum EngineeringChina University of Petroleum(Beijing)Beijing 102249China Faculty of Engineering-Civil and Environmental Engineering University of AlbertaEdmontonAlberta T6G 2R3Canada Institute of Rock and Soil Mechanics Chinese Academic of SciencesWuhanHubei 430071China PetroChina Changqing Oilfield Co Research Institute of Oilfield Exploration and Development XianShaanxi 710018China

The polymeric surfactant can be used as an efficient agent for enhanced oil recovery(EOR)because of its large bulk viscosity and good interfacial ***,there is a sparse understanding of its matching relationship with reservoirs and emulsification occurrence conditions,which may affect its migration and EOR *** intermolecular association molecule polymeric surfactant(IAM)was synthesized by micellar polymerization and characterized with 1 H NMR,FTIR,and *** matching relationship between IAM and reservoirs was evaluated by comparing the viscosity retention rate of effluent in the core flow ***,the effect of the matching relationship on EOR in the heterogeneous reservoir was clarified with parallel core displacement experiments by considering different flow abilities of IAM in the high-permeability *** occurrence conditions of in-situ emulsification of IAM were evaluated via oil-water co-injection experiments under the different injection rates and oil-water *** visualization displacement was carried out to compare the micro EOR mechanisms of different chemical *** results show that IAM features thickening,shearing resistance,viscoelasticity,thermal stability,and interfacial *** matching relationship between cores and IAM could be divided as hardly injected,flow limited,and flow smoothly,corresponding to the viscosity retention ratio of80%,*** could gain better EOR efficiency(17.69%)when its matching relationship to the high permeability layer was“flow limited”.The defined mixture capillary number shows that only when it is greater than 1×10^(3),the in-situ emulsions can be *** to HPAM,IAM could reduce IFT and form vortices to more effectively displace film and corner remaining oils by stripping and peeling off crude *** formed emulsion accumulated at the pore throat could further increase flow resistance,which benefits swept area enlargemen

关键词： Migration Matching relationship Viscosity retention ratio Emulsion EOR

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Rock fracture mechanism of buffer blasting with cushion layer at the borehole bottom

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 325-334页

作者： Xinguang Zhu Chenxi Ding Zhe sui Hong Su Xu Guo School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China

This study primarily investigates the rock fracture mechanism of bottom cushion layer blasting and explores the effects of the bottom cushion layer on rock *** involves analyses of the evolution patterns of blasting stress,characteristics of crack distribution,and rock fracture features in the ***,blasting model experiments were carried out using the dynamic caustics principle to investigate the influence of bottom cushion layers and initiation methods on the integrity of the bottom rock *** experimental results indicate that the combined use of bottom cushion layers and inverse initiation effectively protects the integrity of the bottom rock ***,the process of stress wave propagation and dynamic crack propagation in rocks was simulated using the continuum-discontinuum element method(CDEM)and the Landau explosion source model,with varying thicknesses of bottom cushion *** numerical simulation results indicate that with increasing cushion thickness,the absorption of energy generated by the explosion becomes more pronounced,resulting in fewer cracks in the bottom rock *** illustrates the positive role of the cushion layer in protecting the integrity of the bottom rock mass.

关键词： bottom cushion layer blasting crack propagation continuum-discontinuum element method dynamic stress intensity factor

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Robust interface and excellent as-built mechanical properties of Ti–6Al–4V fabricated through laser-aided additive manufacturing with powder and wire

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 154-168页

作者： Fei Weng Guijun Bi Youxiang Chew Shang sui Chaolin Tan Zhenglin Du Jinlong Su Fern Lan Ng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong Engineering&Technology Research Center for Superhard MaterialSchool of Materials Science and EngineeringShandong UniversityJinan 250061China Institute of Intelligent Manufacturing Guangdong Academy of SciencesGuangzhou 510095China Singapore Institute of Manufacturing Technology 5 Cleantech Loop636732Singapore

The feasibility of manufacturing Ti-6Al-4V samples through a combination of laser-aided additive manufacturing with powder(LAAM_(p))and wire(LAAM_(w))was explored.A process study was first conducted to successfully circumvent defects in Ti-6Al-4V deposits for LAAM_(p) and LAAM_(w),*** the optimized process parameters,robust interfaces were achieved between powder/wire deposits and the forged substrate,as well as between powder and wire *** characterization results revealed the epitaxial prior β grains in the deposited Ti-6Al-4V,wherein the powder deposit was dominated by a finerα′microstructure and the wire deposit was characterized by lamellar α *** mechanisms of microstructure formation and correlation with mechanical behavior were analyzed and *** mechanical properties of the interfacial samples can meet the requirements of the relevant Aerospace Material Specifications(AMS 6932)even without post heat *** fracture occurred within the interfacial area,further suggesting the robust *** findings of this study highlighted the feasibility of combining LAAM_(p) and LAAM_(w) in the direct manufacturing of Ti-6Al-4V parts in accordance with the required dimensional resolution and deposition rate,together with sound strength and ductility balance in the as-built condition.

关键词： laser-aided additive manufacturing powder deposition wire deposition interfacial characteristic mechanical behavior

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钢板混凝土墙-钢筋混凝土楼板连接节点抗剪性能

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哈尔滨工业大学学报 2025年第1期57卷 92-100页

作者：于跃隋春光雷永旺郭全全中国核电工程有限公司北京100840 北京航空航天大学交通科学与工程学院北京100191

模块化技术正在推动新一代核电厂的设计和发展,兼具优良工作性能和工业化施工性能的钢板混凝土(SC)结构在模块化结构具有广泛应用前景。SC墙-RC楼板连接节点作为SC模块结构与RC结构之间的典型传力构件,其结构设计必须既要保证荷载的有... 详细信息

模块化技术正在推动新一代核电厂的设计和发展,兼具优良工作性能和工业化施工性能的钢板混凝土(SC)结构在模块化结构具有广泛应用前景。SC墙-RC楼板连接节点作为SC模块结构与RC结构之间的典型传力构件,其结构设计必须既要保证荷载的有效传递,又要考虑模块化施工的可行性。为研究SC墙-RC楼板连接节点抗剪性能,设计并完成了2个“薄墙厚板型”SC墙-RC楼板连接节点循环加载试验,包括GB/T 51340—2018建议的钢筋连接器连接、附加抗剪键等两种连接方式。试验结果表明:在剪跨比1.50下试件均发生RC楼板弯剪破坏,节点主要传力破坏路径为加载端至楼板根部的斜压杆区域,说明节点结合面不配置抗剪键仍满足抗剪要求;试验过程中,直螺纹钢筋套筒无滑脱、未发生钢筋或焊缝拉断,延性系数均大于4,说明钢筋连接器连接的传力性能良好,可作为SC墙-RC楼板连接节点的有效连接方式;该节点核心区仍属于抗剪薄弱区域,若要满足“全强度连接”设计准则,核心区对拉筋体积含钢率应不低于0.59%。

关键词：钢板混凝土墙钢筋混凝土楼板连接节点钢筋连接器抗剪键

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MDCFS: few-shot object detection with multilevel decoupled classifiers

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Optoelectronics Letters 2025年

作者： LI Chuanhui ZHOU Mian FENG Zhikun sui Zezhou GAO Zhan School of Computer Science and Engineering， Tianjin University of Technology

Few-shot object detection poses unique challenges as it requires effectively learning novel classes with limited labeled data. Current approaches often suffer from biases towards base classes during fine-tuning， leading to suboptimal performance on detecting novel classes. Additionally， in complex scenes， the confusion between foreground and background objects further affects the accuracy and robustness of the model. To address these issues， we propose the Multilevel Decoupling Classification Few-Shot Algorithm (MDCFS). we decouple the standard classifier into a parallel foreground classifier and a background classifier in the Few-Shot Object Detection (FSOD) setting. This decoupling enables the independent separation of positive samples from noisy negative samples， alleviating the foreground-background confusion problem commonly encountered in few-shot detectors. For Generalized Few-Shot Object Detection (G-FSOD)， where the few-shot dataset contains base classes， we further decouple the foreground classification head into a base class classification head and a novel class classification head. To ensure balance， we assign more weight to the novel class classification head， effectively addressing the bias towards base classes. Furthermore， we optimize the initial weights of the few-shot fine-tuning stage， significantly reducing training time and mitigating catastrophic forgetting in G-FSOD. Additionally， we incorporate metric learning into our model with minimal cost. Experimental results demonstrate the effectiveness of our approach. Compared to state-of-the-art few-shot object detection methods based on fine-tuning， MDCFS achieves performance improvements of up to 6.3% on the PASCAL VOC dataset and 1.5% on the COCO dataset.

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Skyrmion-(non)crystal structure stabilized by dipolar interaction

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Rare Metals 2022年第9期41卷 3160-3169页

作者： ming-Xiu sui Yong Hu Department of Physics College of SciencesNortheastern UniversityShenyang110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819China

We report a numerical study on the role of longrange dipolar interaction played on the creation and stabilization of skyrmion-(non)crystal structure in chiral ferromagnetic thin films without any anisotropies,based on a Monte-Carlo simulation *** the increase of external magnetic field,the microscopic spin configuration is transformed from a spin-spiral stripe or labyrinth structure,depending on the strength of dipolar interaction,into a skyrmion-(non)crystal structure,and then into a skyrmiongas structure,and finally into a ferromagnetic ***,with the increase of dipolar interaction,the skyrmion-crystal structure evolves from a triangular arrangement into a square arrangement with the change of skyrmion shape from circle to *** larger dipolar interactions,the skyrmion-crystal structure loses the regular arrangements and the skyrmions,remaining topological,exhibit different shapes and sizes and squeeze with each other,whose distributions are analogous to a non-crystal ***,different skyrmion-(non)crystal structures are stabilized in different ranges of dipolar interactions,which further promotes the applications of skyrmions as non-volatile information carriers.

关键词： Chiral ferromagnetic thin film Skyrmion(non)crystal structure Interfacial Dzyaloshinskii-Moriya interaction Dipolar interaction Monte-Carlo simulation

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Recent advances in gel polymer electrolyte for high-performance lithium batteries

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Journal of Energy Chemistry 2019年第10期28卷 126-142页

作者： ming Zhu Jiaxin Wu yue Wang mingming Song Lei Long Sajid Hussain Siyal Xiaoping Yang Gang sui State Key Laboratory of Organic-Inorganic Composites College of Materials Science and Engineering Beijing University of Chemical Technology

Lithium batteries (LBs) have become increasingly important energy storage systems in our daily life. However, their practical applications are still severely plagued by the safety issues from liquid electrolyte, especially when the batteries are exposed to mechanical, thermal, or electrical abuse conditions. Gel polymer electrolytes (GPEs) are being considered as an effective solution to replace currently available organic liquid electrolyte for building safer LBs. This review provides recent advancements in GPEs applied for high-performance LBs. On the one hand, from the environmental and economic point of view, the skeletons of GPEs changed from traditional polymer to renewable and degradable polymer. On the other hand, in addition to being as a component with good electrochemical and physical characterizations, the GPEs also need to provide some functions for addressing the concerns of lithium (Li) dendrites, unstable cathode electrolyte interface, dissolution and migration of transition metal ions,"shuttle effect" of polysulfides, and so on. Finally, to synchronously meet the challenges from the advanced cathode and Li metal anode, the bio-based GPEs with multi-functionality are proposed to develop high-energy/powerdensity batteries in the future.

关键词： Lithium ion batteries Gel polymer electrolyte Skeleton Functionality

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A new species of Leodamas Kinberg, 1866 (Polychaeta： Orbiniidae) from the Yellow Sea and the East China Sea

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Acta Oceanologica Sinica 2018年第10期37卷 130-135页

作者： SUN yue sui Jixing LI Xinzheng Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture Jiangsu Key Laboratory for Bioresources of Saline Soils Yancheng Teachers University Yancheng 224051 China Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Center for Ocean Mega-Science Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China

Based on polychaete specimens collected from coastal areas of China in 1959, a new species of the family Orbiniidae, Leodamas sinensis sp. nov. is described in the present paper. The new species can be distinguished from its cogeners by the combination of following characters： branchiae present from chaetiger 5; each thoracic neuropodial postchaetal lobe possessing broad tori, with a digital to triangular-shaped papilla at its midlength; 4 or 5 vertical rows of uncini and one posterior row of accompany capillaries in thoracic neuropodia; acicula present in both abdominal notopodia and neuropodia, slightly or distinctly projecting. A key to all known species of the genus is provided.

关键词： new species Orbiniidae Polychaeta Leodamas taxonomy China seas

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Determination of the Observation Area for Metallographic Microstructure of GH4033 Superalloy in a Uniaxially Thermo-Mechanical Compression Experiment

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Acta Metallurgica Sinica(English Letters) 2014年第3期27卷 494-500页

作者： Fengli sui yue Zuo Jun Zhao Baoguo Ma School of Metallurgical Engineering Anhui University of Technology Special Steel Branch Baoshan Iron and Steel Co.Ltd

Based on two-dimensional （2D） rigid-plastic finite element （FE） method, the optimum observation area for metallographic microstructure and the influence of the height-diameter ratio on which were analyzed for the cylindrical samples with the diameter of 8 mm and different heights from 8 to 16 mm in nonuniform compressive experiments. It is shown that the representative metallographic observation area relevant to the applied deformation condition is located at about 0.835 of the radius from the center of the sample to the solder joint between the sample and the thermocouples. At the same time, the microstructure in that area is more appropriate as the height of the sample is 12 mm. The related parameters of GH4033 superalloy were adopted in the FE analysis, and the validity of this analysis was verified by the compressive experiments.

关键词： GH4033 superaUoy Uniaxial compression Uniformity Height-diameter ratio Metallographic observation area Finite element

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Projected relationship between ENSO and following-summer rainfall over the middle reaches of the Yangtze River valley based on CMIP6 simulations

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Atmospheric and Oceanic Science Letters 2023年第6期16卷 40-47页

作者： yue sui Guoping Xie Department of Atmospheric Sciences School of Environmental StudiesChina University of GeosciencesWuhanChina Center for Severe Weather and Climate and Hydro-geological Hazards WuhanChina

厄尔尼诺—南方涛动(ENSO)对长江中游夏季降水(YRSR)的年际变化影响较大.基于CMIP6模式数据,本文预估了未来ENSO与长江中游夏季降水关系的变化.与1979~2014年相似,SSP5-8.5高排放情景下ENSO-YRSR的关系仍表现为前冬发生厄尔尼诺(拉尼娜)... 详细信息

厄尔尼诺—南方涛动(ENSO)对长江中游夏季降水(YRSR)的年际变化影响较大.基于CMIP6模式数据,本文预估了未来ENSO与长江中游夏季降水关系的变化.与1979~2014年相似,SSP5-8.5高排放情景下ENSO-YRSR的关系仍表现为前冬发生厄尔尼诺(拉尼娜)后,长江中游夏季降水为正异常(负异常).同时,仍然受三个物理过程影响:前冬ENSO影响次年夏季印度洋海温(ENSO-TIO SST),印度洋海温异常进而影响菲律宾对流(TIO SST-PSC),菲律宾对流对长江中游夏季降水产生影响(PSC-YRSR).例如,(1)5个CMIP6好模式的中位数和20个EC-Earth3好子集的中位数均预估ENSO-YRSR在2015~2100年大部分时段保持显著正相关关系,因为上述三个物理过程的相关关系在未来也显著.(2)30个CMIP6模式的中位数和56个EC-Earth3子集的中位数预估ENSO-YRSR关系略有增强;主要是因为上述三个物理过程在未来变强.(3)5个CMIP6好模式的中位数预估ENSO-YRSR关系仍强于30个CMIP6模式的中位数结果,主要是因为前者预估的TIO SST-PSC和PSC-YRSR关系更强.未来将关注ENSO-YRSR预估的不确定性来源.

关键词： ENSO 夏季降水中国降水预估

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