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Frequency-Self-Adaptive Radio Frequency Power Harvester Enabled by Shape-Reconfigurable Liquid Metal

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Electromagnetic Science 2024年第2期2卷 91-103页

作者： Cheng Zhang Yuchao Wang zebin zhu Hai Lin Kun Wang Xintong Shi Yi Du Chaoyun Song Long Ren Qiang Cheng Key Laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China College of Physical Science and Technology Central China Normal UniversityWuhan 430000China Center of Quantum and Matter Science and School of Physics Beihang UniversityBeijing 100191China Department of Engineering King’s College LondonLondon WC2R 2LSUK State Key Laboratory of Radio Frequency Heterogeneous Integration College of Electronics and Information EngineeringShenzhen UniversityShenzhen 518000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430000China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified *** take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation ***,to the best of my knowledge,a frequency-self-adaptive RF harvester is first presented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 *** with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.

关键词： Liquid metal Radio frequency power harvesting Frequency-self-adaptive Broadband rectification

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石门揭煤消突钻孔复杂情况处理

中国煤炭地质 2024年第1期36卷 53-56页

作者：朱泽斌北京大地高科地质勘查有限公司北京100040 中煤地质集团有限公司北京100040

石门揭煤作为一项瓦斯治理新技术,能从源头上防控煤与瓦斯突出事故发生。但在施工时容易出现钻井复杂情况,对钻井复杂情况的正确处置关系到钻井工程的成败。淮南谢一矿水文地质条件复杂,地面辅助消突钻井面临着井眼轨迹控制要精准,钻井... 详细信息

石门揭煤作为一项瓦斯治理新技术,能从源头上防控煤与瓦斯突出事故发生。但在施工时容易出现钻井复杂情况,对钻井复杂情况的正确处置关系到钻井工程的成败。淮南谢一矿水文地质条件复杂,地面辅助消突钻井面临着井眼轨迹控制要精准,钻井过程中要绕开障碍物等难题。在施工过程中发生了钻井液漏失和钻具刺漏等复杂情况,通过水泥浆堵漏、水泥封孔和侧钻等措施,成功避免了大量钻井液和地层水涌入巷道,根据示踪剂的返出时间差判定了钻具刺漏的大概位置,采取起钻更换钻具的处理措施,成功避免了井下钻井事故的发生。

关键词：瓦斯治理消突钻孔钻井液漏失钻具刺漏示踪剂淮南谢一矿

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Dual-Comb Ranging

Engineering 2018年第6期4卷 772-778页

作者： zebin zhu Guanhao Wu State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China Division of Advanced Manufacturing Graduate School at ShenzhenTsinghua UniversityShenzhen 518055China

Absolute distance measurement is a fundamental technique in mobile and large-scale dimensional ***-comb ranging is emerging as a powerful tool that exploits phase resolution and frequency accuracy for high-precision and fast-rate distance *** two coherent frequency combs,dual-comb ranging allows time and phase response to be measured *** breaks through the limitations related to the responsive bandwidth,ambiguity range,and dynamic measurement characteristics of conventional ranging *** review introduces dual-comb ranging and summarizes the key techniques for realizing this ranging *** optical frequency comb technology progresses,dualcomb ranging shows promise for various professional applications.

关键词： Ranging Dual-comb interferometer Phase noise Timing jitter Tight-locking Post-correction

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矿山钻孔垂直救援技术的思考及发展趋势

煤矿安全 2024年第4期55卷 245-250页

作者：肖明国张彪林中湘朱泽斌周博郑学召黄渊国家矿山应急救援大地特勘队北京100040 北京大地高科地质勘查有限公司北京100040 中煤地质集团有限公司北京100040 西安科技大学安全科学与工程学院陕西西安710054 国家矿山救援西安研究中心陕西西安710054

矿山钻孔垂直救援技术是一种快速高效的矿井应急救援手段,在以往矿山事故救援中起着关键性作用。阐释了矿山钻孔垂直救援技术原理,得出该技术具有远距离、高效率以及非接触式等优势;归纳分析了王家岭煤矿透水事故、山东平邑石膏矿事故... 详细信息

矿山钻孔垂直救援技术是一种快速高效的矿井应急救援手段,在以往矿山事故救援中起着关键性作用。阐释了矿山钻孔垂直救援技术原理,得出该技术具有远距离、高效率以及非接触式等优势;归纳分析了王家岭煤矿透水事故、山东平邑石膏矿事故的主要救援经过和主要成功要素。对现有的快速成孔方法和人员定位探测技术的局限性展开了一定的思考,展望了钻孔垂直救援技术的发展前景,指出未来我国矿山钻孔救援技术研究的重点研究方向主要包括:打造长距离、高精度、高效率的灾变矿山井下被困人员定位系统,深入研究矿山钻孔救援的快速精准安全成孔技术与灾变矿山井下穿墙探测技术,完善矿山钻孔救援方案,普及救援求生知识。

关键词：钻孔垂直救援事故分析高效成孔穿墙探测应急救援

盐城市主要入海河流大型底栖动物群落结构及水生态评价

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环保科技 2024年第1期30卷 40-46页

作者：邵楠朱泽斌李阳李云飞单龙周军江苏省盐城环境监测中心江苏盐城224002

为研究盐城主要入海河流水生态质量状况,利用河流水生态环境质量综合评价指数(WEQI)评价河流生态环境状况已成为重要方法,并基于2021年5月和9月盐城市主要入海河流底栖动物群落结构及水质数据进行水生态评价。结果表明:全年底栖动物Shan... 详细信息

为研究盐城主要入海河流水生态质量状况,利用河流水生态环境质量综合评价指数(WEQI)评价河流生态环境状况已成为重要方法,并基于2021年5月和9月盐城市主要入海河流底栖动物群落结构及水质数据进行水生态评价。结果表明:全年底栖动物Shannon-Wienner多样性指数为0.39~3.01,平均值为2.08,评级总体为良好。软体动物和节肢动物占比最高,达到77.5%,出现频率最高的是环棱螺属和长臂虾属,主要优势种为蜾蠃蜚属。入海河流断面WEQI评价结果主要为中等和良好,分别占比为60%和40%。生物和生境是制约盐城入海河流水生态环境质量的主要影响因素。

关键词：入海河流大型底栖动物群落结构水生态

基于SOA-RF智能算法的深部巷道支护参数优化研究

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煤炭工程 2024年第9期56卷 41-48页

作者：林中湘张彪柴君锋朱泽斌王龙吴海勇任博涵詹令业中煤地质集团有限公司北京100040 北京大地高科地质勘查有限公司北京100040 中国矿业大学(北京) 北京100083

强开采扰动作用下深部沿空巷道围岩稳定性控制是一项技术难题。为了研究深部沿空巷道在动载荷作用下位移及应力场的演化特征,以高家堡煤矿103工作面为背景建立数值模型。然后,利用FLAC 3D软件分析了动载作用下深部沿空巷道位移及应力场... 详细信息

强开采扰动作用下深部沿空巷道围岩稳定性控制是一项技术难题。为了研究深部沿空巷道在动载荷作用下位移及应力场的演化特征,以高家堡煤矿103工作面为背景建立数值模型。然后,利用FLAC 3D软件分析了动载作用下深部沿空巷道位移及应力场演化特征。最后,通过机器学习的方法,进行了巷道响应参数敏感性分析。结果表明:根据重要性得分,不同动荷载因素作用下巷道围岩对动荷载幅值响应最为明显;不同动载幅值作用下巷道最大变形速率达到17.5 mm/MPa,两帮最大变形速率达到16.1 mm/MPa,塑性发育最大速率达到3552.5 m^(2)/MPa。利用回归分析方法得到了动载荷条件下的经验方程。在此基础上,提出了“让压-支护”协同控制技术,以缓解沿空巷道围岩变形。数值模拟与现场监测结果验证了协同控制技术的可行性。

关键词：深部开采沿空掘巷 SOA-RF智能算法动载作用支护参数

Delineation of urban growth boundary based on FLUS model under the perspective of land use evaluation in hilly mountainous areas

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Journal of Mountain Science 2024年第5期21卷 1647-1662页

作者： ZHANG Yunping LIN Jianping HUANG Yimin CHEN zebin zhu Chenhui YUAN Hao School of Geography and Environmental Engineering Gannan Normal UniversityGanzhou 341000China Key Laboratory of Low Carbon Recycling Technology for Municipal Solid Waste in Jiangxi Province Ganzhou 341000China

With rapid economic development,the size of urban land in China is expanding *** Urban Growth Boundary(UGB)is an expandable spatial boundary for urban construction in a certain period in order to control the urban *** delineation of UGB can inhibit the disorderly spread of urban space and guide the normal development of the *** is of practical significance for the construction of green urban *** study utilizes GIS technology to establish a land construction suitability evaluation system for Nankang city,which is experiencing rapid urban expansion,and outlines the preliminary UGB under the future land use simulation(FLUS)*** the same time,considering the coupled coordination of"Production-Living-Ecological Space",and based on the suitability evaluation,we revised the preliminary UGB by combining the advantages of the patch-generating land use simulation(PLUS)model and the convex hull model to delineate the final *** results show that:1)the comprehensive score of the evaluation of the suitability of the construction of land from high to low shows the distribution of the center of the city to the surrounding circle type spread,the center of the city has the highest suitability *** results of convex hull model show that the urban expansion type of Nankang is *** the future,the urban expansion will mainly occur in the northern part of the *** PLUS model predicts an increase of 3359.97 hm^(2)of construction land in Nankang by 2035,of which 2022.97 hm^(2)is urban construction land.2)The FLUS model has a prediction accuracy of 86.3%and delineates a preliminary UGB area of 9215.07 hm^(2).3)We used the results of the construction suitability evaluation,PLUS model simulation results,and convex hull model predictions to revise the originally delineated *** final delineated UGB area is 8895.67 hm^(2)and it is capable of meeting the future development of the study *** results of the delineation can promote

关键词： Urban sprawl FLUS model Spatial correction Urban growth boundary Sustainable development

Plasmonic evolution maps for planar metamaterials

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Photonics Research 2021年第1期9卷 73-80页

作者： LIYONG JIANG JIANLI JIANG zebin zhu GUANGHUI YUAN MING KANG ZE XIANG SHEN Institute of Micro-nano Photonics&Beam Steering School of ScienceNanjing University of Science and TechnologyNanjing 210094China Centre for Disruptive Photonic Technologies The Photonics InstituteSchool of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore College of Physics and Electronic Information Science Tianjin Normal UniversityTianjin 300387China

Understanding the mode’s origin in planar metamaterials is fundamental for related applications in nanophotonics and *** complex planar metamaterials,conventional analysis that directly obtains the final charge/current distribution of a mode is usually difficult in helping to understand the mode’s *** this paper,we propose a mode evolution method(MEM)with a core analysis tool,i.e.,plasmonic evolution maps(PEMs),to describe the mode evolution in several complementary planar metamaterials with designed plasmonic atoms/*** PEMs could not only clearly explain a mode’s origin,but also reveal the role of a structure’s symmetry in the mode formation *** MEM with PEMs can work as a simple,efficient,and universal approach for the mode analysis in different kinds of planar metamaterials.

关键词： process. planar maps

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青少年参与体育活动研究

运动精品 2017年第7期36卷 78-80页

作者：朱泽彬成都体育学院四川成都610041

青少年面临的健康问题会为成年后埋下健康隐患.我国存在青少年体质下降的问题,文章分析青少年存在健康隐患的原因以及影响因素,并提出一系列措施鼓励青少年开展体育运动,为青少年健身创造条件,深入落实我国健康中国战略,为以后培养创新... 详细信息

青少年面临的健康问题会为成年后埋下健康隐患.我国存在青少年体质下降的问题,文章分析青少年存在健康隐患的原因以及影响因素,并提出一系列措施鼓励青少年开展体育运动,为青少年健身创造条件,深入落实我国健康中国战略,为以后培养创新型人才打下基础.

关键词：青少年体育运动创新型人才