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Back Cover, Volume 42, Number 1, January 2025

Journal of Field robotics 2024年第1期42卷 ii-ii页

作者： Qi Shao Qixing Xia Zhonghan Lin Xuguang Dong Xin An Haoqi Zhao Zhangyi Li Xin-Jun Liu Wenqiang Dong Huichan Zhao Department of Mechanical Engineering Tsinghua University Beijing China State Key Laboratory of Tribology in Advanced Equipment Beijing China Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipment and Control Beijing China NPU Institute of Culture and Heritage (NICH) Northwestern Polytechnical University Xi'an Shaanxi China Key Laboratory of Archeological Exploration and Cultural Heritage Conservation Technology (Northwestern Polytechnical University) Ministry of Education Shaanxi China Xi'an Yuanzhi System Technology Co. Ltd. Shaanxi China

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Semidiscrete optical vortex droplets in quasi-phase-matched photonic crystals

arXiv

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arXiv 2023年

作者： Xu, Xiaoxi Zhao, Feiyan Huang, Jiayao He, Hexiang Zhang, Li Chen, Zhaopin Nie, Zhongquan Malomed, Boris A. Li, Yongyao School of Physics and Optoelectronic Engineering Foshan University Foshan528000 China School of Electronic and Computer Engineering Peking University Shenzhen518055 China Physics Department Solid-State Institute Technion Haifa32000 Israel Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Electronic Information and Optical Engineering Taiyuan University of Technology Taiyuan030024 China Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Tel Aviv University Tel Aviv69978 Israel Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan University Foshan528000 China

A new scheme for producing semidiscrete self-trapped vortices ("swirling photon droplets") in photonic crystals with competing quadratic (χ(2)) and self-defocusing cubic (χ(3)) nonlinearities is proposed. The photonic crystal is designed with a striped structure, in the form of spatially periodic modulation of the χ(2) susceptibility, which is imposed by the quasi-phase-matching technique. Unlike previous realizations of semidiscrete optical modes in composite media, built as combinations of continuous and arrayed discrete waveguides, the semidiscrete vortex "droplets" are produced here in the fully continuous medium. This work reveals that the system supports two types of semidiscrete vortex droplets, viz., onsite- and intersite-centered ones, which feature, respectively, odd and even numbers of stripes, N. Stability areas for the states with different values of N are identified in the system's parameter space. Some stability areas overlap with each other, giving rise to the multistability of states with different N. The coexisting states are mutually degenerate, featuring equal values of the Hamiltonian and propagation constant. An experimental scheme to realize the droplets is outlined, suggesting new possibilities for the long-distance transmission of nontrivial vortex beams in nonlinear media. © 2023, CC BY.

关键词： Photonic crystals

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Lightweight and conformal acousto-ultrasonic sensing network for multi-scale structural health monitoring: A review

FlexMat

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FlexMat 2024年

作者： Yehai Li Shifeng Guo Zhongqing Su Keqin Ding Xian Jun Loh Shenzhen Key Laboratory of Smart Sensing and Intelligent Systems Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Guangdong Provincial Key Lab of Robotics and Intelligent System Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China University of Chinese Academy of Sciences Beijing China The Key Laboratory of Biomedical Imaging Science and System Chinese Academy of Sciences Shenzhen China Department of Mechanical Engineering The Hong Kong Polytechnic University Kowloon Hong Kong Technology Innovation Center of Structural Health Monitoring of State Market Regulation China Special Equipment Inspection & Research Institute Beijing China Institute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR) Singapore Singapore

Structural health monitoring (SHM) has been increasingly investigated for decades. Different physical principles have been developed for damage identification, such as electronics, mechanics, magnetics, etc., with different coverage (i.e., global, large-area, and local monitoring) and sensitivity. Mechanical acousto-ultrasonic-based methods have formed a big family in SHM technologies. Multiple wave/resonance modes have been utilized for versatile SHM tasks. The permanently integrated sensing networks play a significant role in achieving a cost-effective and reliable SHM system, with major concerns including weight increase for large-scale deployment and conformity for complex geometry structures. In this review, typical acousto-ultrasonic sensors made of different material systems are discussed, along with advantages and limitations. Moreover, advanced network installation methods have been introduced, including surface-mounting with pre-integrated networks on substrates and in situ printing, and embedding with composite layup and metal additive manufacturing. Sensor versatility and usage in multi-scale SHM techniques are then highlighted. Different wave/resonance modes are transmitted and received with corresponding elements and network designs. In conclusion, this systematic review mainly covers a collection of acousto-ultrasonic sensors, two modalities of network installation, and their employment with various SHM methods, hopefully providing a useful guide to building lightweight and conformal networks with passive or active-passive sensors, and developing complete and reliable SHM strategies by integrating different damage identification methods on multiple scales.

关键词： acousto-ultrasonic conformal installation lightweight sensing networks structural health monitoring

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Mapping essential urban land use categories in China(EULUC-China):preliminary results for 2018

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Science Bulletin 2020年第3期65卷 182-187页

作者： Peng Gong Bin Chen Xuecao Li Han Liu Jie Wang Yuqi Bai Jingming Chen Xi Chen Lei Fang Shuailong Feng Yongjiu Feng Yali Gong Hao Gu Huabing Huang Xiaochun Huang Hongzan Jiao Yingdong Kang Guangbin Lei Ainong Li Xiaoting Li Xun Li Yuechen Li Zhilin Li Zhongde Li Chong Liu Chunxia Liu Maochou Liu Shuguang Liu Wanliu Mao Changhong Miao Hao Ni Qisheng Pan Shuhua Qi Zhehao Ren Zhuoran Shan Shaoqing Shen Minjun Shi Yimeng Song Mo Su Hoi Ping Suen Bo Sun Fangdi Sun Jian Sun Lin Sun Wenyao Sun Tian Tian Xiaohua Tong Yihsing Tseng Ying Tu Hong Wang Lan Wang Xi Wan Zongming Wang Tinghai Wu Yaowen Xie Jian Yang Jun Yang Man Yuan Wenze Yue Hongda Zeng Kuo Zhang Neng Zhang Tao Zhang Yu Zhang Feng Zhao Yichen Zheng Qiming Zhou Nicholas Clinton Zhiliang Zhu Bing Xu Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Tsinghua Urban Institute Tsinghua UniversityBeijing 100084China Center for Healthy Cities Institute for China Sustainable UrbanizationTsinghua UniversityBeijing 100084China Department of Land Air and Water ResourcesUniversity of CaliforniaDavisCA 95616-8627USA Department of Geological and Atmospheric Sciences Iowa State UniversityAmesIA 50011USA State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China AI for Earth Laboratory Cross-Strait InstituteTsinghua UniversityBeijing 100084China International Institute for Earth System Sciences Nanjing UniversityNanjing 210093China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumchi 830011China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China National Engineering Laboratory for Applied Technology in Forestry&Ecology in South China College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004China College of Surveying&Geo-Informatics Tongji UniversityShanghai 200092China Department of Urban Planning College of Architecture and Urban PlanningTongji UniversityShanghai 200092China Beijing Institute of Urban Planning Beijing 100045China Department of Urban Planning School of Urban DesignWuhan UniversityWuhan 430072China College of Earth Sciences Jilin UniversityChangchun 130061China Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Institute of Remote Sensing and Geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of Urban and Regional Planning School of Geography and PlanningSun Yat-sen Univ

Land use reflects human activities on *** land use is the highest level human alteration on Earth,and it is rapidly changing due to population increase and *** areas have widespread effects on local hydrology,climate,biodiversity,and food production[1,2].However,maps,that contain knowledge on the distribution,pattern and composition of various land use types in urban areas,are limited to city *** mapping standard on data sources,methods,land use classification schemes varies from city to city,due to differences in financial input and skills of mapping *** address various national and global environmental challenges caused by urbanization,it is important to have urban land uses at the national and global scales that are derived from the same or consistent data sources with the same or compatible classification systems and mapping *** is because,only with urban land use maps produced with similar criteria,consistent environmental policies can be made,and action efforts can be compared and assessed for large scale environmental ***,despite of the fact that a number of urban-extent maps exist at global scales[3,4],more detailed urban land use maps do not exist at the same *** at big country or regional levels such as for the United states,China and European Union,consistent land use mapping efforts are rare[5,6](e.g.,https://***/open_land_use/).

关键词： EULUC-China 土地利用类型

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Dynamic response of large turbogenerator stator end winding under fault conditions

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Journal of Physics: Conference Series 2018年第1期1074卷

作者： Yang Zhao Wenhao Huo Cong Zeng Changlin Chen Ying Ma School of Advanced Manufacturing Engineering Chongqing University of Posts and Telecommunications Chongqing 400065 China Chongqing General Industry (Group) Co. Ltd Chongqing 400065 China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China Dongfang Electric Machinery Co. Ltd Deyang 618000 China

The electromagnetic fields of a 600MW turbogenerator stator end region under three-phase short circuit and two-phase short circuit are calculated by numerical simulation base on a three-dimensional electromagnetic model. The variation of electromagnetic force density can also be obtained in the same time. Then the dynamic responses consist of deformation and stress distributions of end winding under three-phase short circuit are numerically analyzed by the fine finite element model which is set up in ABAQUS software. The presented numerical models and method can in turn be used to study the dynamic responses and safety of the end structure under various operation conditions.

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Cover Feature: Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD-Developed Two-Dimensional WO3(ChemElectroChem 2/2018)

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ChemElectroChem 2017年第2期5卷

作者： Zihan Wei Zhenyin Hai Mohammad Karbalaei Akbari Prof. Jie Hu Lachlan Hyde Prof. Stephen Depuydt Prof. Francis Verpoort Prof. Serge Zhuiykov Ghent University Global Campus Department of Applied Analytical & Physical Chemistry 119 Songdomunhwa-ro Yeonsu-gu Incheon South Korea Micro and Nano System Research Center Key Lab of Advanced Transducers and Intelligent Control System (Ministry of Education) & College of Information Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi PR China Factory of the Future Swinburne University of Technology Hawthorn Australia National Research Tomsk Polytechnic University Lenin Avenue 30 634050 Tomsk Russian Federation Laboratory of Organometallics Catalysis and Ordered Materials State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Chemical and Material Engineering Wuhan University of Technology Wuhan P.R. China

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Back Cover: Amorphous Ni0.75Fe0.25(OH)2-Decorated Layered Double Perovskite Pr0.5Ba0.5CoO3-δfor Highly Efficient and Stable Water Oxidation (ChemElectroChem 3/2017)

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ChemElectroChem 2017年第3期4卷 747-747页

作者： Prof. Fengli Liang Prof. Jaka Sunarso Prof. Junkui Mao Ziqiong Yang Prof. Wei Zhou College of Energy and Power Engineering Jiangsu Province Key Laboratory of Aerospace Power System Nanjing University of Aeronautics and Astronautics Nanjing 210016 P.R. China Faculty of Engineering Computing and Science Swinburne University of Technology Jalan Simpang Tiga 93350 Kuching Sarawak Malaysia Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 210009 P.R. China

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Ablation characteristics of hybrid target materials for laser triggered vacuum switches

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Journal of Physics: Conference Series 2018年第1期1074卷

作者： Chen Hui The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei 430074 P.R.China Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy Hubei University of technology Wuhan 430068 P. R. China Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of technology Wuhan 430068 P. R. China

The key difference of laser triggered vacuum switch (LTVS) and electrical triggered vacuum switch (ETVS) is the different triggered way, because the initial plasmas were generated by laser irradiation target material of LTVS, which generates different impact on the triggered characteristics of LTVS with different target materials. There are three laser wavelength (1064nm, 532nm and 266nm) which are tested the triggered characteristics of target materials, with decreased conduction time delay under the condition of increasing laser energy.

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Cover Picture: Dithienopyrrole-/Benzodithiophene-Based Donor–Acceptor Polymers for Memristor (ChemPlusChem 9/2014)

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ChemPlusChem 2014年第9期79卷 2192-2192页

作者： Cheng Wang Prof. Dr. Gang Liu Prof. Dr. Yu Chen Shanshan Liu Prof. Dr. Qibin Chen Prof. Dr. Runwei Li Dr. Bin Zhang Key Laboratory for Advanced Materials Institute of Applied Chemistry East China University of Science and Technology 130 Meilong Road Shanghai 200237 (P. R. China) CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences 519 Zhuangshi Avenue Ningbo Zhejiang 315201 (P. R. China) The State Key Laboratory of ASIC & System Fudan University 220 Handan Road Shanghai 200433 (P. R. China) Yu Chen Key Laboratory for Advanced Materials Institute of Applied Chemistry East China University of Science and Technology 130 Meilong Road Shanghai 200237 (P. R. China) Runwei Li CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences 519 Zhuangshi Avenue Ningbo Zhejiang 315201 (P. R. China)

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Tailoring Oxygen-Depleted and Unitary Ti3C2TxSurface Terminals by Molten Salt Electrochemical Etching Enables Dendrite-Free Stable Zn Metal Anode

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Angewandte Chemie 2024年第36期136卷

作者： Feng Tian Fei Wang Wei Nie Xueqiang Zhang Xuewen Xia Linhui Chang Dr. Zhongya Pang Dr. Xing Yu Dr. Guangshi Li Prof. Dr. Shen Hu Prof. Dr. Qian Xu Prof. Dr. Hsien-Yi Hsu Prof. Dr. Yufeng Zhao Prof. Dr. Li Ji Prof. Dr. Xionggang Lu Prof. Dr. Xingli Zou State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering Shanghai University Shanghai 200444 P. R. China State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai 200433 P. R. China Department of Materials Science and Engineering School of Energy and Environment City University of Hong Kong Hong Kong 999077 P. R. China Institute of Sustainable Energy College of Sciences Shanghai University Shanghai 200444 P. R. China

Two-dimensional Ti 3 C 2 T x MXene materials, with metal-like conductivities and versatile terminals, have been considered to be promising surface modification materials for Zn-metal-based aqueous batteries (ZABs). However, the oxygen-rich and hybridized terminations caused by conventional methods limit their advantages in inhibiting zinc dendrite growth and reducing corrosion-related side reactions. Herein, −O-depleted, −Cl-terminated Ti 3 C 2 T x was precisely fabricated by the molten salt electrochemical etching of Ti 3 AlC 2 , and controlled in situ terminal replacement from −Cl to unitary −S or −Se was achieved. The as-prepared −O-depleted and unitary-terminal Ti 3 C 2 T x as Zn anode coatings provided excellent hydrophobicity and enriched zinc-ionophilic sites, facilitating Zn 2+ horizontal transport for homogeneous deposition and effectively suppressing water-induced side reactions. The as-assembled Ti 3 C 2 S x @Zn symmetric cell achieved a cycle life of up to 4200 h at a current density and areal capacity of 2 mA cm −2 and 1 mAh cm −2 , respectively, with an impressive cumulative capacity of up to 7.25 Ah cm −2 at 5 mA cm −2 //2 mAh cm −2 . These findings provide an effective electrochemical strategy for tailoring −O-depleted and unitary Ti 3 C 2 T x surface terminals and advancing the understanding of the role of specific Ti 3 C 2 T x surface chemistry in regulating the plating/stripping behaviors of metal ions.

关键词： Oxygen-depleted Ti3C2Tx Unitary terminals Molten salt electrochemical etching Dendrite-free Zn anode

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