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arXiv 2020年

作者： Han, Ran Yu, Qian Li, Zhiwei Li, Jingtai Cheng, Yaping Liao, Bin Jiang, Lixiang Ni, Sidao Liu, Tianfang Wang, Zheng Science and Technology on Reliability and Environmental Engineering Laboratory Beijing Institute of Spacecraft Environment Engineering Beijing100094 China State Key Laboratory of Geodesy and Earth’s Dynamics Innovation for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan430077 China College of nuclear science and technology Beijing Normal University Beijing100875 China School of Nuclear Science and Engineering North China Electric Power University Beijing102206 China

We present a cosmic ray muon tomographic experiment for measuring the muon flux and imaging the tunnel overburden structures in Changshu, China. The device used in this study is a tracking detector based on the plastic scintillator with SiPM technology, which can be conveniently operated in field works. The compact system with sensitive area of 6400cm2 can measure the angular distribution of cosmic muons. It’s able to image the overburden density length from the surface of overburden to the detector along the muon tracks. The open sky muon flux measurement outside the tunnel has a good agreement with the modified Gassier Formula model. The distributions of muon flux at three positions inside the tunnel are very similar to that of open sky. Assuming the average density of overburden compact sandstone is 2.65g/cm3, the overburden thickness can be obtained from the density length derived from the difference of muon flux inside and outside the tunnel. Moreover, for known penetrated lengths (i.e., topography of overburden), the density anomalies of the overburden can also been obtained. This study suggests a potential application for imaging and detecting subsurface structures in civil engineering, tunnels or caverns with the cosmic ray muon telescope. Copyright © 2020, The Authors. All rights reserved.

关键词： Tomography

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Transient Fault Diagnosis Algorithm based on Feature Classification and Its Application in High-Power Laser facility

Transient Fault Diagnosis Algorithm based on Feature Classif...

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Chinese Control and Decision Conference, CCDC

作者： Qiang Ren Hang Gao Hailei Ren Baoran An Tianyou Yun Xiaoli Wang Institute of Computer Application China Academy of Engineering Physics Mianyang State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics and Information System College of Electronic Science and Technology National University of Defense Technology Changsha Institute of Fluid Physics China Academy of Engineering Physis MianYang China

ISBN: (数字)9781728158556

ISBN: (纸本)9781728158563

High-power laser facility plays an import role both in scientific research and military application, and the occurred faults are usually transient. In this paper, a transient fault diagnosis algorithm based on feature classification is proposed, and the algorithm has been applied in the high-power laser facility. The method extracts the features of input data with an autoencoder network. And based on the extracted features, a multi-layer full connection neural network is adopted for fault diagnosis. By comparing the results with those obtained by traditional fault diagnosis methods, the performance of the algorithm has been verified.

关键词： Feature extraction Fault diagnosis Circuit faults Neural networks Principal component analysis Kernel Transient analysis

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A Green Paradigm for Internet of Things: Ambient Backscatter Communications

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China Communications 2019年第7期16卷 109-119页

作者： Wei Zhang Yao Qin Wenjing Zhao Minzheng Jia Qiang Liu Ruisi He Bo Ai Science and Technology on Information Systems Engineering Laboratory National University of Defense Technology and also with Institute of Telecommunication Satellites China Academy of Space Technology (CAST) Beijing Key Lab of Transportation Data Analysis and Mining Beijing Engineering Research Center of High-Speed Railway Broadband Mobile Communications School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China Department of Information Engineering Beijing Polytechnic College Beijing 100042 China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing 100044 China

Internet of Things (IoT) has attracted extensive interest from both academia and industries, and is recognized as an ultimate infrastructure to connect everything at anytime and anywhere. The implementation of IoT generally faces the challenges from energy constraint and implementation cost. In this paper, we will introduce a new green communication paradigm, the ambient backscatter (AmBC), that could utilize the environmental wireless signals for both powering a tiny-cost device and backscattering the information symbols. Specifically, we will present the basic principles of AmBC, analyze its features and advantages, suggest its open problems, and predict its potential applications for our future IoT.

关键词： ambient backscatter (AmBC) RF-powered device Internet of Things (IoT) battery-free tag wire-less sensor

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Research progress of high-strength self-healing polymer materials: Balance between mechanical strength and self-healing efficiency

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Chemical engineering Journal 2025年 518卷

作者： Yan, Zhi-Hui Huang, Hua-Xin Ding, Guo-Quan Dong, Shan-Shan Jiang, Ke-Jin Li, Yu-Ying Liu, Yang Jiang, Yan Wang, Shuang-Fei Hu, Guo-Hua Du, Jun Zhang, Shi-Xian Zhao, Hui School of Light Industry and Food Engineering Guangxi University Nanning 530004 China Laboratory of Reactions and Process Engineering CNRS-University of Lorraine Nancy 54001 France Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization School of Materials and Environment Guangxi Colleges and Universities Key Laboratory of Environmental-friendly Materials and New Technology for Carbon Neutralization Guangxi Minzu University Nanning 530105 China Department of Materials Science and Engineering The Pennsylvania State University University Park PA United States Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization College of Materials and Chemical Engineering Hezhou University Hezhou 542899 China

In recent years, self-healing polymer materials, as novel and advanced materials, have garnered significant attention. Through physical and chemical methods, various advanced functions have been incorporated into them, sparking the curiosity of both the scientific community and industries. However, these materials usually suffer from relatively low mechanical strength, which significantly reduces their service life, reliability, and safety, while severely limiting their practical applications. This review comprehensively explores the underlying causes of the incompatibility between self-healing performance and mechanical strength in such materials. To overcome this problem, three design strategies for high-strength self-healing polymers are proposed: bionic design that mimics the self-healing mechanism of organisms;system design that constructs multiple networks based on molecular structures and balances performance;and composite strategy that utilizes the enhanced properties of nanomaterials and optimizes performance. These strategies address the incompatibility issue directly and are expected to achieve a balance between self-healing efficiency and mechanical strength. Finally, future challenges and prospects of high-strength self-healing polymer materials are outlined. © 2025 Elsevier B.V.

关键词： Bio-inspired Crosslinked network High-strength Nanoscale fillers Self-healing

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Prediction of energy resolution in the JUNO experiment

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Chinese Physics C 2025年第1期49卷 35-59页

作者： Angel Abusleme Thomas Adam Kai Adamowicz Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Joao Pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Marco Beretta Antonio Bergnoli Daniel Bick Lukas Bieger Svetlana Biktemerova Thilo Birkenfeld Iwan Blake David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Stéphane Callier Steven Calvez Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Vanessa Cerrone Jinfan Chang Yun Chang Auttakit Chatrabhuti Chao Chen Guoming Chen Pingping Chen Shaomin Chen Xin Chen Yiming Chen Yixue Chen Yu Chen Zelin Chen Zhangming Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng YuChin Cheng Alexander Chepurnov Alexey Chetverikov Davide Chiesa Pietro Chimenti Yen-Ting Chin Po-Lin Chou Ziliang Chu Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Marta Colomer Molla Selma Conforti Di Lorenzo Alberto Coppi Daniele Corti Simon Csakli Chenyang Cui Flavio Dal Corso Olivia Dalager Jaydeep Datta Christophe De La Taille Zhi Deng Ziyan Deng Xiaoyu Ding Xuefeng Ding Yayun Ding Bayu Dirgantara Carsten Dittrich Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Wei Dou Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Katherine Dugas Stefano Dusini Hongyue Duyang Jessica Eck Timo Enqvist Andrea Fabbri Ulrike Fahrendholz Lei Fan Jian Fang Wenxing Fang Dmitry Fedoseev Li-Cheng Feng Qichun Feng Federico Ferraro Amélie Fournier Fritsch Fritsch Haonan Gan Feng Gao Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Marco Grassi Maxim Gromov Vasily Gromov Minghao G Yerevan Physics Institute YerevanArmenia Université Libre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Millennium Institute for SubAtomic Physics at the High-energy Frontier(SAPHIR) ANIDChile Pontificia Universidad Católica de Chile SantiagoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina China Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North China Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of Chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-sen University GuangzhouChina Harbin Institute of Technology HarbinChina University of Science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South China HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Nanjing University NanjingChina Guangxi University NanningChina East China University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an Jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhouChina Institute of Physics National

This paper presents an energy resolution study of the JUNO experiment,incorporating the latest knowledge acquired during the detector construction *** determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 *** achieve this ambitious goal,significant efforts have been undertaken in the design and production of the key components of the JUNO *** factors affecting the detection of inverse beta decay signals have an impact on the energy resolution,extending beyond the statistical fluctuations of the detected number of photons,such as the properties of the liquid scintillator,performance of photomultiplier tubes,and the energy reconstruction *** account for these effects,a full JUNO simulation and reconstruction approach is *** enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy *** results of this study reveal an energy resolution of 2.95% at 1 ***,this study assesses the contribution of major effects to the overall energy resolution *** analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data ***,it provides a guideline for comprehending the energy resolution characteristics of liquid scintillator-based detectors.

关键词： energy resolution liquid scintillator detector JUNO simulation reconstruction

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Construction of nickel–cobalt layered double hydroxide nanosheets on electrospun carbon nanofibers as free-standing electrodes for high-performance asymmetric quasi-solid-state supercapacitors

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Chemical engineering science 2025年 316卷

作者： Yang, Qincheng Lin, Yujuan Li, Qianglin Yang, Shujing Wu, Ling Zhang, Huimin Zhou, Binghua Wang, Zhipeng Huang, Zheng-Hong Wang, Ming-Xi School of Chemical and Environmental Engineering Wuhan Institute of Technology Wuhan430205 China Department of Material and Environmental Engineering Chengdu Technological University Chengdu611730 China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing100049 China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan430081 China Research Institute of Chemical Defense Beijing100191 China Institute of Adv. Mater. Jiangxi Normal University 99 Ziyang Avenue Nanchang330022 China Lab of Adv. Mater. School of Materials Science and Engineering Tsinghua University Beijing100084 China

Nickel-cobalt layered double hydroxide (NiCo-LDH) nanosheets were uniformly grown on electrospun carbon nanofibers (CNFs) through a controlled hydrothermal synthesis. The NiCo-LDH@CNFs composite was fabricated by immersing CNFs into a Ni/Co precursor solution, followed by in-situ growth of vertically aligned NiCo-LDH nanosheets during hydrothermal treatment. This method effectively minimized particle agglomeration and ensured intimate interfacial coupling between NiCo-LDH and the conductive CNF scaffold. The optimized NiCo-LDH@CNF-3 hybrid exhibited a hierarchical micro-mesoporous structure with a high specific surface area (605 m2 g−1) and uniform distribution of Ni (23.33 wt%) and Co (14.46 wt%). The composite demonstrated exceptional electrochemical performance, delivering a record specific capacitance of 2493 F g−1 at 1 A g−1 and retaining 873 F g−1 at 30 A g−1, attributed to synergistic contributions from electric double-layer capacitance (CNFs) and pseudocapacitance (NiCo-LDH). An asymmetric quasi-solid-state supercapacitor (ASC) assembled using NiCo-LDH@CNF-3 (positive electrode) and CNFs (negative electrode) achieved a high energy density of 46.16 Wh kg−1 at 800 W kg−1. The device exhibited remarkable flexibility, retaining 94.36 % of its energy density after 90° bending, and maintained 92.84 % capacitance retention over 8000 cycles. These results underscore the composite's potential as a high-performance, flexible electrode for advanced energy storage systems. © 2025 Elsevier Ltd

关键词： Nanosheets

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2,2′-Bipyridyl-4,4′-Dicarboxylic Acid Modified Buried Interface of High-Performance Perovskite Solar Cells

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Angewandte Chemie 2024年第6期137卷

作者： Dr. Mingming Zhao Dr. Wei-Min Gu Prof. Ke-Jian Jiang Dr. Xinning Jiao Kun Gong Dr. Fengzhu Li Prof. Xueqin Zhou Prof. Yanlin Song Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China. School of Chemical Engineering and Technology Tianjin University 300072 Tianjin P.R. China. These authors contributed equally. College of Energy and Environmental Engineering Hebei Key Laboratory of Air Pollution Cause and Impact Hebei University of Engineering Handan 056038 China Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon 999077 Hong Kong SAR State Key Laboratory of Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and Technology Clear Water Bay Kowloon 999077 Hong Kong SAR

The regulation of interfaces remains a critical and challenging aspect in the pursuit of highly efficient and stable perovskite solar cells (PSCs). Here, 2,2′-bipyridyl-4,4′-dicarboxylic acid ( HBPDC ) is incorporated as an interfacial layer between SnO 2 and perovskite layers in PSCs. The two carboxylic acid moieties on HBPDC bind to SnO 2 through esterification, while its nitrogen atoms, possessing lone electron pairs, interact with uncoordinated lead (Pb 2+ ) atoms through Lewis acid-base interactions. This dual functionality enables simultaneous passivation of surface defects on both the SnO 2 and buried perovskite layers. In addition, the electron-deficient nature of HBPDC enhances interfacial energy band alignment and facilitates electron transfer from the perovskite to SnO 2 . Furthermore, the incorporation of HBPDC strengthens the interfacial adhesion, improving mechanical reliability. As a result, the PSCs exhibited an impressive power conversion efficiency (PCE) of 25.41 % under standard AM 1.5G conditions, along with remarkable environmental stability.

关键词： interface modification defect passivation perovskite solar cells long-term stability

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Research Progress of Ceramic Metallization technology

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Research and Application of Materials science 2020年第1期2卷 12-16页

作者： Yang XIANG Xuechong XIONG Jin WEN Guangyao ZHAO Zhihang PENG Feng CAO Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha Hunan410073P.R China Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials School of Materials and Environmental EngineeringHunan University of HumanitiesScience and TechnologyLoudi Hunan 417000 China Construction Machinery Test Center Changsha Hunan410073P.R China

Due to the wide application of ceramics in electronic device packaging,the performance of ceramic metallization layer directly determines the performance of the whole package *** paper introduces the main preparation methods of ceramic metallization,discusses the influence of Mo powder size,metallization formula,sintering temperature and other factors on the performance of ceramic metallization layer prepared by activated Mo-Mn method,and introduces several kinds of methods that can be tested to test the performance of ceramic metallized sealing samples.A new research direction of Ceramic Metallization technology in the advanced field is put forward.

关键词： ceramic-metal sealing metallization of ceramics preparation method

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Assessing spread risk of COVID-19 in early 2020

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Data science and Management 2022年第4期5卷 212-218页

作者： Shengjie Lai Isaac I.Bogoch Nick W.Ruktanonchai Alexander Watts Xin Lu Weizhong Yang Hongjie Yu Kamran Khan Andrew J.Tatem WorldPop School of Geography and Environmental ScienceUniversity of SouthamptonSouthamptonSO171BJUK Shanghai Institute of Infectious Disease and Biosecurity Fudan UniversityShanghai200433China Department of Medicine University of TorontoTorontoM5S3H2Canada Population Health Sciences Virginia TechBlacksburgVA24061USA Li Ka Shing Knowledge Institute St.Michael’s HospitalTorontoM5B1T8Canada Bluedot TorontoM5J1A7Canada College of Systems Engineering National University of Defense TechnologyChangsha410073China Department of Public Health Sciences Karolinska InstitutetStockholm17177Sweden School of Population Medicine and Public Health Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing100730China School of Public Health Fudan UniversityKey Laboratory of Public Health SafetyMinistry of EducationShanghai200433China

A novel coronavirus emerged in late 2019,named as the coronavirus disease 2019(COVID-19)by the World Health Organization(WHO).This study was originally conducted in January 2020 to estimate the potential risk and geographic range of COVID-19 spread at the early stage of the transmission.A series of connectivity and risk analyses based on domestic and international travel networks were conducted using historical aggregated mobile phone data and air passenger itinerary *** found that the cordon sanitaire of the primary city was likely to have occurred during the latter stages of peak population numbers leaving the city,with travellers departing into neighbouring cities and other megacities in *** estimated that there were 59,912 international air passengers,of which 834(95%uncertainty interval:478–1,349)had COVID-19 infection,with a strong correlation seen between the predicted risks of importation and the number of imported cases *** the limited understanding of emerging infectious diseases in the very early stages of outbreaks,our approaches and findings in assessing travel patterns and risk of transmission can help guide public health preparedness and intervention design for new COVID-19 waves caused by variants of concern and future pandemics to effectively limit transmission beyond its initial extent.

关键词： COVID-19 Human mobility Transmission Mobile phone Air travel

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Meteorological environment and risks along the Arctic Northeast Passage

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Research in Cold and Arid Regions 2025年

作者： Chen, JinLei Yang, ChengDe Kang, ShiChang Sun, HuLin State Key Laboratory of Cryospheric Science and Frozen Soil Engineering Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Gansu Lanzhou 730000 China Hunan University of Science and Technology Hunan Xiangtan 411201 China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Sichuan Chengdu 610299 China National Marine Environmental Forecasting Center Beijing 100081 China

With rapid warming in the Arctic region, the navigability of the Arctic has improved in recent decades. Except for the sea ice, meteorological conditions are also very important for navigation safety. In this study, crucial meteorological factors and their control areas along the Northeast Passage (NEP) were analyzed by using observations. In addition, the risks in the operations and safety of sailors were investigated with meteorological thresholds identified by the Inuit people. The impact area of low temperatures is the East Siberian Sea (−13 °C to −17 °C under Shared Socioeconomic Pathway 1-2.6), especially in the waters located north of the New Siberian Islands and within the Dmitrii Laptev Strait and Sannikov Strait. The precipitation, wind speed, and visibility decrease, and the atmospheric humidity increases eastward from the Kara Sea. The Kara Sea and Laptev Sea are mainly dominated by eastward wind, while westward wind is very significant in the East Siberian Sea and Chukchi Sea. Under the Shared Socioeconomic Pathway 2-4.5 scenario, the Kara Sea is projected to present low meteorological risk from 2026 to 2030, while higher risks persist in the eastern NEP. In contrast, under the Shared Socioeconomic Pathway 5-8.5 scenario, medium risks become more prevalent, particularly through the Sannikov Strait and north of the New Siberian Islands. The above results are highly important for the meteorological navigation of Arctic shipping and for the formulation of relevant international navigation policies in the Arctic. © 2025 Northwest Institute of Eco-Environment and Resources, CAS

关键词： Arctic CMIP6 Meteorological navigation Northeast Passage Shipping

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