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Optimized Mask-RCNN model for particle chain segmentation based on improved online ferrograph sensor

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Friction 2024年第6期12卷 1194-1213页

作者： Shuo wang Miao WAN Tonghai WU Zichen BAI kunpeng wang Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi’an Jiaotong UniversityXi’an 710049China

Ferrograph-based wear debris analysis(WDA)provides significant information for wear fault analysis of mechanical *** decades of offline application,this conventional technology is being driven by the online ferrograph sensor for real-time wear state ***,online ferrography has been greatly limited by the low imaging quality and segmentation accuracy of particle chains when analyzing degraded lubricant oils in practical *** address this issue,an integrated optimization method is developed that focuses on two aspects:the structural re-design of the online ferrograph sensor and the intelligent segmentation of particle *** enhancing the imaging quality of wear particles,the magnetic pole of the online ferrograph sensor is optimized to enable the imaging system directly observe wear particles without penetrating ***,a light source simulation model is established based on the light intensity distribution theory,and the LED installation parameters are determined for particle illumination uniformity in the online ferrograph *** this basis,a Mask-RCNN-based segmentation model of particle chains is constructed by specifically establishing the region of interest(ROI)generation layer and the ROI align layer for the irregular particle *** these measures,a new online ferrograph sensor is designed to enhance the image acquisition and information extraction of wear *** verification,the developed sensor is tested to collect particle images from different degraded oils,and the images are further handled with the Mask-RCNN-based model for particle feature *** results reveal that the optimized online ferrography can capture clear particle images even in highly-degraded lubricant oils,and the illumination uniformity reaches 90%in its imaging *** importantly,the statistical accuracy of wear particles has been improved from 67.2%to 94.1%.

关键词： wear particle analysis online ferrography particle image acquisition particle chain segmentation

Security estimation of LWE via BKW algorithms

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Cybersecurity 2024年第1期7卷 71-87页

作者： Yu Wei Lei Bi Xianhui Lu kunpeng wang SKLOIS Institute of Information EngineeringCASBeijingChina School of Cyber Security University of Chinese Academy of SciencesBeijingChina

The Learning With Errors(LWE)problem is widely used in lattice-based cryptography,which is the most promising post-quantum cryptography *** are a variety of LWE-solving methods,which can be classified into four groups:lattice methods,algebraic methods,combinatorial methods,and exhaustive *** Blum–Kalai–Wasserman(BKW)algorithm is an important variety of combinatorial algorithms,which was first presented for solving the Learning Parity With Noise(LPN)problem and then extended to solve *** this paper,we give an overview of BKW algorithms for solving *** introduce the framework and key techniques of BKW algorithms and make comparisons between different BKW algorithms and also with lattice methods by estimating concrete security of specific LWE *** also briefly discuss the current problems and potential future directions of BKW algorithms.

关键词： Post-quantum cryptography Learning with errors problem Lattice-based cryptography Security estimation

Simple and effective:Superlubricity behaviour of the G-quadruplex hydrogel with high selectivity for K+ions based on the ocular environment

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Friction 2024年第11期12卷 2548-2562页

作者： Hongdong wang Jian WU kunpeng wang Yunjuan SU Xiacong ZHANG Yuhong LIU Jianhua ZHANG School of Mechatronic Engineering and Automation and Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai UniversityShanghai 200444China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Department of Polymer Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

Hydrogels have been the subject of significant research in the field of friction due to their exceptional lubricating *** this study,the G-quadruplex hydrogel with high selectivity for K+ions was formed by introducing a mixture of G,2-formylphenylboronic acid,and polyethylene glycol diamine into simulated artificial tears solution with high transparency,and an ultra-low coefficient of friction(COF)of about 0.004 was obtained based on the simulated ocular environment,thus achieving macroscopic *** friction pairs simulating the ocular environment,to assess the frictional performance of the G-quadruplex hydrogel as both a lubricant and a friction pair based on the simulated ocular environment,we conducted experiments considering various factors such as concentration,sliding speed,and *** these experiments,it was found that superlubricity was achieved when the G-quadruplex hydrogel was applied as lubricant or friction *** effect was attributed to the three-dimensional network structure and hydrophilicity of the hydrogel,which facilitated the formation of a highly bearing and flowing hydration layer,promoting macroscopic *** to the G-quadruplex hydrogel with low concentration,the high concentration hydrogel(75 mM)exhibited increased mechanical strength and robustness in *** with biocompatibility experiments,our synthesized G-quadruplex hydrogel has excellent biocompatibility and offers a novel approach to achieve superlubricity in ocular drug delivery.

关键词： superlubricity ocular environment G-quadruplex hydrogel bio-compatibility

A novel electro-Fenton hybrid system for enhancing the interception of volatile organic compounds in membrane distillation desalination

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Journal of Environmental Sciences 2024年第4期138卷 189-199页

作者： Hongxin Liu Kuiling Li kunpeng wang Zhiyong wang Zimou Liu Sichao Zhu Dan Qu Yu Zhang Jun wang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua UniversityBeijing 100084China School of Chemical and Environmental Engineering Beijing CampusChina University of Mining and TechnologyBeijing 100083China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China

Membrane distillation(MD)is a promising alternative desalination technology,but the hydrophobic membrane cannot intercept volatile organic compounds(VOCs),resulting in aggravation in the quality of *** term of this,electro-Fenton(EF)was coupled with sweeping gas membrane distillation(SGMD)in a more efficient way to construct an advanced oxidation barrier at the gas-liquid interface,so that the VOCs could be trapped in this layer to guarantee the water quality of the *** the so-called EF-MD process,an interfacial interception barrier containing hydroxyl radical formed on the hydrophobic membrane *** contributed to the high phenol rejection of 90.2% with the permeate phenol concentration lower than 1.50 mg/*** interceptions can be achieved in a wide temperature range,even though the permeate flux of phenol was also *** EF-MD system was robust to high salinity and could electrochemically regenerate ferrous ions,which endowed the long-term stability of the *** novel EF-MD configuration proposed a valuable strategy to intercept VOCs in MD and will broaden the application of MD in hypersaline wastewater treatment.

关键词： Membrane distillation VOC interception Interfacial oxidation Electro-Fenton Hypersaline wastewater

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由守土到开疆:春秋时期列国疆域观念的转变

中华文化论坛 2024年第4期 154-164页

作者：王坤鹏吉林大学中国史系吉林长春130012

春秋时期,周王朝固有的政治结构发生变动,原属王朝地方行政单位的诸侯国各自发展,不断完善主权,充实封疆。诸侯、邦君过去作为周王的下属,其主要职责是“正封”,即治理封域,至春秋时期则转为“启土”。出于经济及安全方面的考虑,列国不... 详细信息

春秋时期,周王朝固有的政治结构发生变动,原属王朝地方行政单位的诸侯国各自发展,不断完善主权,充实封疆。诸侯、邦君过去作为周王的下属,其主要职责是“正封”,即治理封域,至春秋时期则转为“启土”。出于经济及安全方面的考虑,列国不断拓展疆域,成为拥有广土众民的领土国家。与社稷血食相比,开疆拓土变得日益重要,“启封疆以利社稷”成为统治者侵逼他国的借口。贵族阶层流行以“启方”“启疆”等命名,反映了开疆拓土已成为春秋贵族社会的主流追求。列国对疆域安全愈加重视,部分贵族主张“守在四境”及“土不可易”,将疆域视为一个整体,并认识到即使是外围边域亦具特定价值,不可轻弃。

关键词：春秋时期疆域观念诸侯疆土安全

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基于多模态双向信息增强的RGBT跟踪网络

北京航空航天大学学报 2024年第2期50卷 596-605页

作者：赵伟刘磊王鲲鹏涂铮铮罗斌多模态认知计算安徽省重点实验室合肥230601 安徽大学计算机科学与技术学院合肥230601

可见光-热红外(RGBT)目标跟踪旨在挖掘可见光和热红外数据的互补优势,实现鲁棒的目标跟踪。目前主流方法通常引入模态权重来实现多模态信息融合,但简单地为各个模态分配权重无法充分挖掘可见光和热红外模态的互补优势。基于此,提出了一... 详细信息

可见光-热红外(RGBT)目标跟踪旨在挖掘可见光和热红外数据的互补优势,实现鲁棒的目标跟踪。目前主流方法通常引入模态权重来实现多模态信息融合,但简单地为各个模态分配权重无法充分挖掘可见光和热红外模态的互补优势。基于此,提出了一种多模态双向信息增强的RGBT跟踪网络(MBIENet)。设计了一种特征聚合模块,用于聚合模态共享特征和模态特定特征以建模目标外观信息;提出了一种新的多模态双向调制融合模块,可有效融合模态互补信息,减少冗余特征和无用特征对跟踪器的影响;提出了一个轻量化的通道空间注意力模块,可自适应调整不同环境下不同模态的贡献。在GTOT、RGBT234和LasHeR数据集上的实验结果表明:所提跟踪算法的准确率和成功率优于当前主流的跟踪算法。

关键词：可见光-热红外目标跟踪深度学习多模态信息融合多模态信息交互

“内国”与“外土”:周代铜器铭文所见的两个疆域概念

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中原文化研究 2024年第1期12卷 120-128页

作者：王坤鹏吉林大学中国史学系吉林长春130012

周代铜器录卣铭中的“内国”及戎生钟铭中的“外土”构成了一对在内涵上密切相关的疆域概念。这两个概念有特定内涵,“内国”意为“内域”,在铭文中指以郑洛地区为中心的中原腹地,这一地区自夏代至两周一直是早期王朝的核心疆域。“外... 详细信息

周代铜器录卣铭中的“内国”及戎生钟铭中的“外土”构成了一对在内涵上密切相关的疆域概念。这两个概念有特定内涵,“内国”意为“内域”,在铭文中指以郑洛地区为中心的中原腹地,这一地区自夏代至两周一直是早期王朝的核心疆域。“外土”为周王朝领土的外层区域,其地存在着大量的土著族群。不过作为周王朝能够有效管辖的区域,该区仍属周王朝之疆域。“内国”与“外土”作为一对疆域概念,反映了周王朝疆域形态及疆域治理均具有多层次性的特征。“内国”是王朝疆域的内层,由王廷所任命的内服职官加以治理。“外土”则是王朝疆域的外层,周王朝于此广设侯、伯贵族以治理土著族群并威慑在其之外的敌对势力。至于“外土”之外的区域,亦可能受到周人的军事打击,但周王朝已无法对其进行有效控制,其地已非周之疆域。

关键词：西周内国外土疆域

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耕地保护经济补偿实施绩效与实施偏差

生态科学 2024年第4期43卷 100-109页

作者：王坤鹏欧名豪吴文俊河南财经政法大学资源与环境学院郑州450000 南京农业大学土地管理学院南京210095

在“经济-生态-福利”绩效内涵及评价模式构建基础上,引入物元可拓模型,探讨了成都市2009—2018年耕地保护经济补偿绩效并分析其实施偏差。结果表明:①2009—2018年成都市耕地保护经济补偿绩效水平等级整体呈现出“较差”等级向“优秀... 详细信息

在“经济-生态-福利”绩效内涵及评价模式构建基础上,引入物元可拓模型,探讨了成都市2009—2018年耕地保护经济补偿绩效并分析其实施偏差。结果表明:①2009—2018年成都市耕地保护经济补偿绩效水平等级整体呈现出“较差”等级向“优秀”等级跃升趋势,但其转化状态不稳定。②2009—2018年成都市耕地保护经济补偿政策在经济绩效方面的作用较为显著,而其生态绩效和福利绩效却整体偏低。③政府耕地保护经济补偿成本系数、农村人均可支配收入、农村社会消费品零售额、农村居民参加社会养老保险人数等指标对成都市耕地保护经济补偿绩效提升有重要贡献,而化肥施用量不合理与耕地保护的农村劳动力投入过少成为制约其绩效提升的关键因素。④耕地保护的多重显性和隐形效益是耕地保护经济补偿绩效实施较低的内在因素,而耕地保护相关利益主体在耕地保护经济补偿政策实施过程中的行为抉择是其绩效高低的核心外在因素。因此,加强耕地保护经济补偿绩效内涵及绩效动态评估模型研究,探索耕地保护的多重显性和隐形效益显化及内化机制应成为今后研究重点。

关键词：耕地补偿物元分析利益主体绩效实施偏差

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耦合生态系统服务的社会生态风险分析框架

应用生态学报 2024年第5期35卷 1419-1425页

作者：杨黎敏王坤鹏易家林郭杰欧名豪南京农业大学公共管理学院南京210095 河南财经政法大学资源与环境学院郑州450000 农村土地资源利用与整治国家地方联合工程研究中心南京210095 中国资源环境与发展研究院南京210095

人类社会与生态系统的高度耦合使得社会生态风险成为系统风险治理的主要对象。生态系统服务作为联系生态过程与人类社会活动的纽带,是解构社会生态风险的核心变量与化解社会生态风险的关键抓手。本文首先从生态系统服务视角阐明社会生... 详细信息

人类社会与生态系统的高度耦合使得社会生态风险成为系统风险治理的主要对象。生态系统服务作为联系生态过程与人类社会活动的纽带,是解构社会生态风险的核心变量与化解社会生态风险的关键抓手。本文首先从生态系统服务视角阐明社会生态风险的内涵与生成机理,提出“客观风险-感知风险-风险行为”的风险演化逻辑。然后,基于驱动-压力-状态-影响-响应(DPSIR)模型提出社会生态风险分析框架,拓展有关社会生态系统风险研究和管理实践的内容和方法体系。最后,提出耦合生态系统服务的社会生态风险研究应当关注以下议题:1)生态系统过程、生态系统服务与人类福祉传导机制探索;2)社会主体行为的响应及其对生态系统服务和人类福祉的影响机制探讨;3)耦合生态系统服务的社会生态风险多尺度评估模型构建。耦合生态系统服务的社会生态风险分析框架基于人与自然的互馈关系探讨风险形成、演化与治理逻辑,可为明晰生态问题的深层意蕴和化解社会生态风险的路径选择提供思路。

关键词：风险生态系统服务社会生态系统风险演化驱动-压力-状态-影响-响应(DPSIR)框架