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Impact of temperature and salinity on fines detachment: AFM measurements and XDLVO theory

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Petroleum Science 2025年第1期22卷 338-347页

作者： Wei-Feng Yuan Yu-Long Yang Lu Yuan ji-Rui Hou State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum Unconventional Petroleum Research Institute China University of Petroleum

Fine particle detachment and subsequent migration can lead to severe pore plugging and consequent permeability decline. Therefore, it is crucial to quantify the critical condition when fine particle detachment occurs. The frequently observed deviations or even contradictions between experimental results and theoretical predictions of fines detachment arise from an insufficient understanding of adhesion force that can be highly influenced by salinity and temperature. To clarify the intrinsic influence of salinity and temperature on fines detachment, adhesion forces between carboxyl microspheres and hydrophilic silica substrates in an aqueous medium were measured at various salinities and temperatures using atomic force microscopy(AFM). The AFM-measured adhesion force decreases with increasing salinity or temperature. Trends of mean measured adhesion forces with temperature and salinity were compared with the DLVO and XDLVO theories. DLVO theory captured the trend with temperature via the impact of temperature on electric double layer interactions, whereas XDLVO theory captured the observed trend with salinity via the impact of salinity on the repulsive hydration force. Our results highlight the significance of hydration force in accurately predicting the fate of fines in porous media.

关键词： Adhesion force AFM Temperature Salinity XDLVO Hydration force

Self-Triggered Impulsive Control for Nonlinear Stochastic Systems

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 264-266页

作者： Tao Zhan Yi ji Yabin Gao Hongyi Li Yuanqing Xia the School of Mathematics and Statistics Southwest University the School of Astronautics Harbin Institute of Technology IEEE the College of Electronic and Information Engineering Southwest University Zhongyuan University of Technology the School of Automation Beijing Institute of Technology

Dear Editor,This letter deals with the stabilization problem of nonlinear stochastic systems via self-triggered impulsive control(STIC), where the timing of impulsive control actions is not dependent on continuous state monitoring. In contrast to the existing self-triggered control method, novel self-triggered mechanism(STM) is proposed by incorporating a waiting time for stabilizing impulses. This allows for direct prediction of the next impulsive instant.

关键词： Stabilization

Characterization of combined blast-and fragments-induced synergetic damage in polyurea coated liquid-filled container

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Defence Technology(防务技术) 2025年第1期43卷 201-224页

作者： Chen Tao Chong ji Xin Wang Juan Gu Yuting Wang Changxiao Zhao College of Field Engineering Army Engineering University of PLANanjing210007China College of Defense Engineering Army Engineering University of PLANanjing211101China

Liquid-filled containers(LFC)are widely used to store and transport petroleum,chemical reagents,and other *** an important target of military strikes and terrorist bombings,LFC are vulnerable to blast waves and *** explore the protective effect of polyurea elastomer on LFC,the damage characteristics of polyurea coated liquid-filled container(PLFC)under the combined loading of blast shock wave and fragments were studied *** microstructure of the polyurea layer was observed by scanning electron microscopy,and the fracture and self-healing phenomena were *** simulation approach was used to explain the combined blast-and fragments-induced on the PLFC in ***,the effects of shock wave and fragment alone and in combination on the damage of PLFC were comprehensively *** showed that the polyurea reduces the perforation rate of the fragment to the LFC,and the self-healing phenomenon could also reduce the liquid loss rate inside the *** polyurea reduces the degree of depression in the center of the LFC,resulting in a decrease in the distance between adjacent fragments penetrating the LFC,and an increase in the probability of transfixion and fracture between *** the close-in blast,the detonation shock wave reached the LFC before the *** does not all have an enhanced effect on the protection of *** presence of internal water enhances the anti-blast performance of the container,and the hydrodynamic ram(HRAM)formed by the fragment impacting the water aggravated the plastic deformation of the *** combined action has an enhancement effect on the deformation of the *** depth of the container depression was 27%higher than that of the blast shock wave alone;thus,it cannot be simply summarized as linear superposition.

关键词： Polyurea Prefabricated fragment Liquid-filled container Hydrodynamic ram Cumulative effect

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基于分布智能控制的供电恢复方案研究

智慧电力 2019年第7期47卷 62-68页

作者：应俊蔡月明刘明祥张明嵇文路方传平南瑞集团(国网电力科学研究院)有限公司江苏南京211106 国网南京供电公司江苏南京200019 国网上海市电力公司上海200122

分布式馈线自动化(FA)系统关于故障定位与隔离方面的研究日趋成熟,而在供电恢复方面略显不足。为了进一步提升分布式FA系统的供电恢复能力,解决因故障点位置不同而导致供电恢复困难的问题,提出了一种可用于多联络、多分支配电网的供电... 详细信息

分布式馈线自动化(FA)系统关于故障定位与隔离方面的研究日趋成熟,而在供电恢复方面略显不足。为了进一步提升分布式FA系统的供电恢复能力,解决因故障点位置不同而导致供电恢复困难的问题,提出了一种可用于多联络、多分支配电网的供电恢复方案,通过建立负荷评估模型和待恢复区拓扑模型,由代理终端负责通过单联络开关、单联络开关切负荷完成供电恢复的工作,实现了非故障区域的供电恢复,并通过实时数字仿真仪(RTDS)验证了控制策略及其算法的有效性。

关键词：馈线自动化供电恢复负荷评估实时数字仿真仪

疫情期间高校线上教学状况及影响学习效果的因素分析——以滁州学院为例

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滁州学院学报 2021年第4期23卷 114-120,136页

作者：王彬陈怡文纪文露周佳滁州学院教育科学学院安徽滁州239000 滁州学院教育科学院安徽滁州239000

采用滁州学院教务处对全校6270名学生的调查数据分析了2020年上半年疫情防控期间滁州学院开展的在线教学状况。研究发现,滁州学院在疫情期间主要使用学习通开展线上教学,主要采用的教学形式为学生根据线上资源或任务自主学习,而学生最... 详细信息

采用滁州学院教务处对全校6270名学生的调查数据分析了2020年上半年疫情防控期间滁州学院开展的在线教学状况。研究发现,滁州学院在疫情期间主要使用学习通开展线上教学,主要采用的教学形式为学生根据线上资源或任务自主学习,而学生最喜欢的教学形式为课堂直播或课堂直播+线上讨论答疑。大部分学生认为老师上课认真投入,提供的资源可以很好或较好地满足学习需求,不过很多同学感觉线上枯燥无味,认为此次线上教学效果不如传统面授课堂。经调查分析发现,影响线下教学的主要因素有硬件因素,软件因素、教师因素和学生自身因素。经多元回归分析发现,影响学生线上学习效果的因素主要包括学生对于教师提供学习资源的总体评价、学习投入、互动效果、课程门数、性别和年级。

关键词：疫情线上学习高校学生线上教学

Advances in synaptic PET imaging and intervention with synapse-targeted small-molecular drugs for dementia diagnosis and therapy

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Fundamental Research 2025年第1期5卷 63-71页

作者： Xiuhong Lu Bin ji Gang Huang Hong Ding Shanghai Key Laboratory of Molecular Imaging Jiading District Central Hospital Affiliated Shanghai University of Medicine and Health SciencesShanghai 201318China School of pharmacy Shanghai University of Medicine and Health SciencesShanghai 201318China Department of Radiopharmacy and Molecular Imaging School of pharmacyFudan UniversityShanghai 201203China

Dementia is characterized by synaptic and neuronal dysfunction in disease-specific brain *** failure of dementia clinical trials with therapeutic drugs targeting abnormal protein aggregates has caused researchers to shift their focus to synaptic functions and increased the importance of clinically available imaging for synaptic density and the development of synapse-targeted *** density imaging with positron emission tomography(PET)tracer enables non-invasive detection of synaptic loss and hence investigates the association with other neuropathological events exemplified by disease-specific abnormal protein *** studies have reviewed the progress of synaptic density imaging;however,to our knowledge,there is no article yet that summarizes the research progress of multimodal imaging of synaptic density tracers combined with other dementia ***,synaptic function intervention for dementia therapy has not yet been *** this review,first we detail the progress of synaptic density imaging including tracer development and preclinical/clinical application,followed by a discussion of multimodal imaging of synaptic density tracers combined with classic dementia biomarkers in the clinical research ***,we briefly summarize the synapse-targeted drugs for dementia therapy.

关键词： Synaptic density imaging Synaptic vesicle protein 2A Dementia Multimodal imaging UCB-J Positron emission tomography

On the Riemann–Hilbert problem for the reverse space-time nonlocal Hirota equation with step-like initial data

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Communications in Theoretical Physics 2025年第2期77卷 32-40页

作者： Bei-Bei Hu Ling Zhang Zu-Yi Shen ji Lin School of Mathematics and Finance Chuzhou University Applied Mathematics Research Center Chuzhou University Department of Physics Zhejiang Normal University

In this paper, we use the Riemann–Hilbert(RH) method to investigate the Cauchy problem of the reverse space-time nonlocal Hirota equation with step-like initial data: q(z, 0) = o(1) as z →-∞ and q(z, 0) = δ + o(1) as z → ∞, where δ is an arbitrary positive constant. We show that the solution of the Cauchy problem can be determined by the solution of the corresponding matrix RH problem established on the plane of complex spectral parameter λ. As an example, we construct an exact solution of the reverse space-time nonlocal Hirota equation in a special case via this RH problem.

关键词： nonlocal Hirota equation Cauchy problem Riemann-Hilbert problem step-like initial data

Large-Scale Environmental DNA Metabarcoding Shows a Comprehensive Fish Community in the East China Sea:Do Water Layer and Habitat Matter?

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Journal of Ocean University of China 2025年第1期24卷 217-228页

作者： WANG Xiaoyan ZHANG Haobo ZHONG Lanping SHIH Yijia ji Fenfen GAO Tianxiang National Engineering Research Center of Marine Facilities Aquaculture Zhejiang Ocean UniversityZhoushan 316004China Chinese Sturgeon Research Institute China Three Gorges CorporationYichang 443100China Fisheries College Jimei UniversityXiamen 361021China Fishery College Zhejiang Ocean UniversityZhoushan 316004China

Biodiversity serves as the foundation for human survival and *** fishes play a crucial role in supporting both global biodiversity and food *** conventional methods for fish diversity and fishery resources survey are inadequate to meet the growing demand for large-scale and long-period *** eDNA metabarcoding approach provides an effective and noninvasive monitoring revolution,and has been applied to identify fish *** study conducted a comprehensive comparison of fish diversity in the East China Sea on a large scale both horizontally and *** results showed a total of 81 fish species,which were classified into 20 orders,44 families and 72 *** no statistically significant difference in fish diversity was found amongst the horizontal groups(east-middle-west,south-middle-north,and shallow-middle-deep)and the various sampling layers(surface-middle-bottom),discernible trends were obtained in this *** diversity results revealed the orders of east>middle>west,middle>north>south and deep>shallow>middle in horizontal ***,surface water exhibited a higher level of fish diversity than other water *** fish species were only detected at specific vertical *** diverse composition of fish species across different water layers can be attributed to their distinct ecological *** overall findings suggest that an increase of sampling stations and mixed samples should be collected in deeper water bodies for comprehensive understanding of fish *** study can also provide the fundamental data and experimental design reference for future studies and fishery management.

关键词： environmental DNA metabarcoding fish diversity spatial distribution East China Sea

Prospects on mangrove knowledge services in the smart era:From plant atlas to knowledge graphs

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Science China Earth Sciences 2025年第1期68卷 111-127页

作者： Zhi-Wei HOU Wenlong jiNG Cheng-Zhi QIN ji YANG Qing XIA Xiaoling YIN Key Laboratory of Guangdong for Utilization of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and ApplicationGuangzhou Institute of GeographyGuangdong Academy of SciencesGuangzhou510070China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China School of Traffic&Transportation Engineering Changsha University of Science and TechnologyChangsha410114China

Mangroves are crucial to the ecological security of the Earth and human *** management,conservation,and restoration are of great importance and necessitate the support of spatio-temporal information and multidisciplinary knowledge such as biology and *** knowledge services such as plant atlas provide illustrated textual knowledge of ***,this kind of service is oriented to information retrieval and is incapable of effectively mining and utilizing fragmented knowledge from multi-source heterogeneous data,facing the problem of“massive data,rare knowledge”.Knowledge graphs are capable of extracting,organizing,and fusing the knowledge contained in massive data into semantic networks that can be understood and computed by *** provide a solution for the realization of intelligent knowledge *** on the urgent need for mangrove knowledge acquisition,formal representation,and intelligent services,this paper proposes a research prospect on mangrove knowledge graphs and knowledge *** first analyze the similarities and differences between various domain-specific concepts of *** this basis,we define the mangrove knowledge graph as a large-scale knowledge base that integrates multi-disciplinary knowledge and spatio-temporal information with mangrove ecosystems as the ***,we propose a research framework for mangrove knowledge services that can realize the transformation from multi-modal data to intelligent knowledge services,including multiple research levels such as ubiquitous data sensing and aggregation,knowledge organization and graph construction,and intelligent mangrove knowledge ***,the methods and workflow for constructing mangrove knowledge graphs are ***,we discuss the challenges and possible future directions of mangrove knowledge services in the smart era,including the construction of a mangrove knowledge system that integrates the domain-specific charac

关键词： Mangrove Tupu Knowledge graph Multi-modal Knowledge service