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Risk factors and machine learning prediction models for bronchopulmonary dysplasia severity in the Chinese population

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World Journal of Pediatrics 2023年第6期19卷 568-576页

作者： wen He Lan zhang Rui Feng wei-Han Fang Yun Cao Si-qi sun Peng Shi Jian-Guo Zhou liang-Feng Tang Xiao-Bo zhang yuan-yuan qi Department of Respirology Children’s HospitalFudan University399 Wanyuan RoadShanghai 201102China Department of Neonatology Children’s HospitalFudan UniversityShanghaiChina Shanghai Key Laboratory of Intelligent Information Processing School of Management and StatisticsFudan UniversityShanghaiChina Shanghai Pinghe Bilingual School ShanghaiChina Department of Data Management and Statistics Children’s Hospital of Fudan UniversityShanghaiChina Department of Urology Children’s HospitalFudan UniversityShanghaiChina

Background Bronchopulmonary dysplasia(BPD)is a common chronic lung disease in extremely preterm *** outcome and clinical burden vary dramatically according to *** some prediction tools for BPD exist,they seldom pay attention to disease severity and are based on populations in developed *** study aimed to develop machine learning prediction models for BPD severity based on selected clinical factors in a Chinese *** In this retrospective,single-center study,we included patients with a gestational agelinical information during the maternal,birth and early postnatal *** factors were selected through univariable and ordinal logistic regression *** models based on logistic regression(LR),gradient boosting decision tree,XGBoost(XGB)and random forest(RF)models were implemented and assessed by the area under the receiver operating characteristic curve(AUC).Results We ultimately included 471 patients(279 mild,147 moderate,and 45 severe cases).On ordinal logistic regression,gestational diabetes mellitus,initial fraction of inspiration O_(2) value,invasive ventilation,acidosis,hypochloremia,C-reactive protein level,patent ductus arteriosus and Gram-negative respiratory culture were independent risk factors for BPD *** the XGB,LR and RF models(AUC=0.85,0.86 and 0.84,respectively)all had good *** We found risk factors for BPD severity in our population and developed machine learning models based on *** models have good performance and can be used to aid in predicting BPD severity in the Chinese population.

关键词： Bronchopulmonary dysplasia Machine learning-Prediction model Preterm

Overview of the physics design of the EHL-2 spherical torus

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Plasma Science and Technology 2025年第02期 9-28页

作者：梁云峰谢华生石跃江顾翔姜欣辰董力立王雪韵杨丹可刘文军孙恬恬王嵎民李直蔡剑青宋显明谭沐芝杨光赵寒月董家齐彭元凯宋绍栋陈正元李颖颖刘兵罗迪杨圆明刘敏胜 Jianqing CAI Zhengyuan CHEN Jiaqi DONG lili DONG Kaiming FENG Xingxin GE Xiang GU Dong GUO Lei HAN Hairong huaNG Kunwei huaNG Xianli huaNG Xinchen JIANG Dongxu li Hongyue li Pengmin li Songjian li Yingying li Zhi li Yunfeng liang Bing liU Minsheng liU Shuo liU wenjun liU Yong liU Xiuchun LUN Di LUO wenwu LUO Yueng-Kay Martin PENG Ji qi Yuejiang SHI Shaodong SONG Xianming SONG Tiantian sun Muzhi TAN Renyi TAO Hanqing WANG Xueyun WANG Yu WANG Yumin WANG Xiao XIAO huasheng XIE qifeng XIE Danke YANG Enwu YANG Guang YANG Xu YANG yuanming YANG Baoshan yuan Hong ZANG wenwei zhang Hanyue zhao Xin zhao Yihang zhao Peihai ZHOU Hongfeng ZHU Xiaojun ZHU Debu BANERJEE Zhongyong CHEN Shuyu DAI Di HU Jiankun hua Yanqing huaNG Zhuo huaNG Kai li li li Chengyue liU Tong liU Yiliang liU Zhifang liN Haojie MA Zhiwei MA Erhui WANG Feng WANG Fuqiong WANG Zhengxiong WANG Shuai XU qingwei YANG Jie zhang Pingwei ZHENG wei ZHENG Hebei Key Laboratory of Compact Fusion Forschungszentrum Jülich GmbH Institute of Fusion Energy and Nuclear Waste Management-Plasmaphysik ENN Science and Technology Development Co. Ltd. Southwestern Institute of Physics DISAT Polytechnic University of Turin huazhong University of Science and Technology Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education) School of Physics Dalian University of Technology Beihang University Hengyang Normal University College of Computer Science South-Central Minzu University Centre for Theoretical and Computational Physics College of Physics qingdao University College of physics Donghua University School of Physics Hefei University of Technology School of Electrical Engineering& Automation Jiangsu Normal University School of liberal Arts and Sciences North China Institute of Aerospace Engineering Zhejiang University Department of Plasma Physics and Fusion Engineering University of Science and Technology of China University of South China

ENN is planning the next generation experimental device EHL-2 with the goal to verify the thermal reaction rates of p-11B fusion,establish spherical torus/tokamak experimental scaling laws at 10's keV ion temperature,and provide a design basis for subsequent experiments to test and realize the p-11B fusion burning *** on 0-dimensional（0-D） system design and 1.5-dimensional transport modelling analyses,the main target parameters of EHL-2 have been basically determined,including the plasma major radius,R0,of 1.05 m,the aspect ratio,A,of 1.85,the maximum central toroidal magnetic field strength,B0,of 3 T,and the plasma toroidal current,Ip,of 3 *** main heating system will be the neutral beam injection at a total power of 17 *** addition,6 MW of electron cyclotron resonance heating will serve as the main means of local current drive and MHD instabilities *** physics design of EHL-2 is focused on addressing three main operating scenarios,i.e.,（1） high ion temperature scenario,（2） high-performance steady-state scenario and（3） high triple product *** scenario will integrate solutions to different important issues,including equilibrium configuration,heating and current drive,confinement and transport,MHD instability,p-11B fusion reaction,plasma-wall interactions,*** that,there are several unique and significant challenges to address,including● establish a plasma with extremely high core ion temperature(Ti,0> 30 keV),and ensure a large ion-to-electron temperature ratio(Ti,0/Te,0> 2),and a boron concentration of 10%-15% at the plasma core;● realize the start-up by non-inductive current drive and the rise of MA-level plasma toroidal *** is because the volt-seconds that the central solenoid of the ST can provide are very limited;● achieve divertor heat and particle fluxes control including complete detachment under high P/R（> 20 MW/m） at relatively low electron *** overview will introduce the advanced progress in the ph

关键词：

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

The accumulation characteristics and exploration potential of oil and gas in the back-arc basin of Japan under the background of high heat flow

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China Geology 2023年第4期6卷 660-675页

作者： Jian-qiang Wang Jie liang Jian-wen Chen qing-fang zhao Yin-guo zhang Jian-wei zhang Sen li chang-qing Yang Jian zhang Jing sun Chuan-sheng Yang Yong yuan Lee-Jel Jiang qingdao Institute of Marine Geology China Geological SurveyMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resources Laoshan LaboratoryQingdao 266071China Korea Institute of Ocean Science and Technology Busan 49111Korea

The Sea of Japan is located in the southeast margin of Eurasia, in the triangle area of the western Pacific Ocean. Due to the interaction of the Pacific plate, Eurasian plate and Philippine plate, its tectonic environment is complex, forming a typical trench-arc-basin system. At present, 148 oil and gas fields have been discovered in Japan, with an oil and gas resource of 255.78×10^(6) t, showing a good prospect for oil and gas exploration. Based on the previous research and the recently collected geological and geophysical data, the characteristics of tectonic-sedimentary evolution and geothermal field in the basins around the Sea of Japan are analyzed. The results show that the tectonic evolution of the basin is mainly controlled by plate subduction and back-arc oceanic crust expansion, and it mainly undergone four tectonic-sedimentary evolution stages: Subduction period, basin development period, subsidence period and compression deformation period. The overall heat flow value of Japan Sea is high, and it is distributed annularly along Yamato Ridge. The geothermal heat flow value is about 50–130 MW/m^(2), and the average heat flow is75.9±19.8 MW/m^(2), which has a typical “hot basin ”. The high heat flow background provides unique thermal evolution conditions for hydrocarbon generation, which leads to the high temperature and rapid evolution. The authors summarized as “early hydrocarbon generation, rapid maturity and shallow and narrow hydrocarbon generation window”. The type of oil and gas is mainly natural gas, and it mainly distributed in Neogene oil and gas reservoirs. The trap types are mainly structural traps, lithologic traps and composite traps. In addition, the pre-Neogene bedrock oil and gas reservoirs also show a good exploration prospect. The resource prospecting indicates that Niigata Basin, Ulleung Basin and kitakami Basin are the main target areas for future exploration and development.

关键词： Oil and gas Hydrocarbon generation capacity Back-arc basin Geothermal field Tectono-sedimentary evolution Hydrocarbon accumulation The Sea of Japan Western Pacific

Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： qiang li li‑Jiao Wang Xiang‑Biao qiu Jing‑wen li wei Xu Tao li Ze‑Bin lin chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang sun Jing‑Yu Tang Rong zhang Han‑Tao Jing Bo Mei qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao qi‑Ping Chen Zhen Chen Zeng‑qi Cui An‑Chuan Fan chang‑qing Feng Fan‑Zhen Feng Ke‑qing Gao Min‑Hao Gu chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑wei Hu Han‑Xiong huang wei‑hua Jia Hao‑Yu Jiang wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin ling Kang Bo li Chao li Gong li Jia‑wen li Xiao li Yang li Jie liu Rong liu Shu‑Bin liu Guang‑yuan Luan Bin‑Bin qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan zhao‑Hui Song Zhi‑Xin Tan Sheng‑Da Tang Peng‑Cheng Wang zhao‑Hui Wang Zhong‑wei wen Xiao‑Guang Wu Xuan Wu li‑Kun Xie Yi‑wei Yang Han Yi Yong‑Ji Yu Guo‑Hui zhang lin‑Hao zhang Mo‑Han zhang qi‑wei zhang Xian‑Peng zhang Yu‑liang zhang Yue zhang Zhi‑Yong zhang Mao‑yuan zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

Spatial distribution of bolls affects yield formation in different genotypes of Bt cotton varieties

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Journal of Integrative Agriculture 2019年第11期18卷 2492-2504页

作者： NIE Jun-jun yuan Yan-chao qiN Du-lin liU Yan-hui WANG Shuang-lei li Jin-pu zhang Mei-ling zhao Na GUO wen-jun qi Jie MAO li-li SONG Xian-liang sun Xue-zhen State Key Laboratory of Crop Biology Ministry of Science and Technology/College of AgronomyShandong Agricultural UniversityTai’an 271018P.R.China Technical Guidance Station of Cotton Production in Shandong Province Jinan 250013P.R.China Qufu Agricultural Bureau Qufu 273100P.R.China Yantai Agricultural Technology Extension Service Yantai 264000P.R.China Seed Management Department of Pingdingshan Pingdingshan 467000P.R.China Shanghai Center for Plant Stress Biology Chinese Academy of SciencesShanghai 201602P.R.China

To optimize the spatial distribution of cotton bolls and to increase the yield,the relationship between yield components and boll spatial distribution was investigated among different Bt(Bacillus thuringensis)cotton varieties.A five-year field experiment was conducted to reveal the reasons for the differences in lint yield and fiber quality across three Bt cotton varieties with different yield formations from 2013 to *** lint yield of Jiman 169(the average yield from 2013-2017 was 42.2 g/plant)was the highest,i.e.,16.3 and 36.9%higher than Lumianyan 21(L21)and Daizimian 99B(99B),*** the differences in boll weight among the three cultivars were similar to the lint yield,while the others yield components were *** the increase in lint yield was mainly attributed to the enlargement in boll ***,the change in fiber quality was inconsistent with the lint yield,and the quality of L21 was significantly better than that of Jimian 169(J169)and 99B,which was caused by the diversity of boll spatial *** with 99B,the loose-type J169 had the highest number of large bolls in inner positions;the tight-type L21 had a few large bolls and the highest number of lower and middle *** approximately 80.72%of the lint yield was concentrated on the inner nodes in Jiman 169,compared with 77.44%of L21 and 66.73%of 99B during the five-year *** lint yield was significantly affected by the interannual changes,the lint yield of J169 was the highest and the most stable,as well as its yield *** observations demonstrated the increase in lint yield was due to the increase in boll weight,and the large bolls and high fiber quality were attributed to the optimal distribution of bolls within the canopies.

关键词： Bt cotton yield formation boll spatial distribution lint yield fiber quality

Frameworked electrolytes:Ionic transport behavior and high mobility for solid state batteries

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InfoMat 2024年第2期6卷 76-89页

作者： Jianguo sun Hao yuan Jing Yang Tuo Wang Yulin Gao qi zhao Ximeng liu Haimei Wang Yong-wei zhang John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore ST Engineering Advanced Material Engineering Pte.Ltd. SingaporeSingapore National University of Singapore(Chongqing)Research Institute Chongqing Liang Jiang New AreaChongqingthe People's Republic of China Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

All solid-state batteries(ASSBs)are the holy grails of rechargeable batteries,where extensive searches are ongoing in the pursuit of ideal solid-state ***,there is still a long way off to the satisfactorily high(enough)ionic conductivity,long-term stability and especially being able to form compatible interfaces with the solid ***,we have explored ionic transport behavior and high mobility in the sub-nano pore networks in the framework ***,the frameworked electrolyte behaves as a solid,and however in the(sub)-nano scales,the very limited number of solvent molecules in confinement makes them completely different from that in liquid *** from a liquid-electrolyte counterpart,the interactions between the mobile ions and surrounding molecules are subject to dramatic changes,leading to a high ionic conductivity at room temperature with a low activation ***+ions in the sub-nano cages of the network structure are highly mobile and diffuse rather independently,where the rate-limiting step of ions crossing cages is driven by the local concentration gradient and the electrostatic interactions between li^(+)*** new class of frameworked electrolytes(FEs)with both high ionic conductivity and desirable interface with solid electrodes are demonstrated to work with li-ion batteries,where the ASSB with liFePO_(4)shows a highly stable electrochemical performance of over 450 cycles at 2℃ at room temperature,with an almost negligible capacity fade of 0.03‰ each *** addition,the FE shows outstanding flexibility and anti-flammability,which are among the key requirements of large-scale applications.

关键词： frameworked electrolyte macroscopically solid with 3D ionic channels in sub-nano-scales solid-state battery space confinement of li ions

liquefaction structures induced by the M5.7 earthquake on May 28, 2018 in Songyuan, Jilin Province, NE China and research implication

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Journal of Palaeogeography 2020年第1期9卷 109-127页

作者： Zhu-Fu Shao Jian-hua Zhong John Howell Bing Hao Xi-Wu Luan Ze-Xuan liu wei-Min Ran Yun-Feng zhang Hong-qi yuan Jing-Jing liu liang-Tian Ni Guan-Xian Song Jin-lin liu wen-Xin zhang Bing zhao School of Geosciences Northeast Petroleum UniversityDaqing 163318Heilongjiang ProvinceChina Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina Department of Geology and Petroleum Geolog University of AberdeenAberdeen AB243UEUK School of Geosciences China University of PetroleumQingdao 266580Shandong ProvinceChina qingdao Institute of Marine Geology China Geological SurveyQingdao 266071Shandong ProvinceChina.

An earthquake of magnitude M5.7 occurred in Yamutu village,Songyuan City,Jilin Province,NE China(45°16′12″N/124°42′35″E)on May 28,2018,with a focal depth of 13 *** epicenter is located at the intersection of the Fuyu/Songyuan-zhaodong Fault,Second Songhua River Fault and Fuyu North Fault which lies northwest of TanchengLujiang Fault(Tan-Lu Fault).The earthquake-induced widespread liquefaction structures and ground surface fissures within 3 km from the epicenter,caused serious disasters to the local *** visible liquefied structures include sand volcanoes,liquefied sand mounds,sand dikes and sand *** volcanoes can be divided into sand volcano with a crater,sand volcano without a crater and water volcano(no sand).Other soft-sediment deformation structures(SSDS)induced by the earthquake include deformation lamination,load and flame structures,deformation folds,dish structures,convolute bedding and water-escape *** formation process of the sand volcanoes comprises three stages:(1)building up excess pore-fluid pressure in the liquefied layer,(2)cracking of the low-permeable overlying layer,and(3)mixture of sand-water venting out of the ground *** the upward movement,the liquefied sand is injected into the low-permeable layer to form sand veins,sand sills and various types of deformation *** distribution of seismic liquefaction structure can be divided into four zones:the thoroughly liquefied zone,the lower liquefied zone with SSDS,the upper liquefied zone with SSDS,and the ground surface liquefied *** liquefaction occurred at a burial depth of 2–5 m,and the thickness of liquefied sand is 2 ***-SW(35°–215°)trending compressive stress is possibly the seismogenic trigger of the Songyuan M5.7 earthquake that caused the fault(Fuyu/Songyuan-zhaodong Fault)to *** study of the Songyuan seismic liquefaction structures gives insight into the prediction of modern earthquakes and disasterprone ***

关键词： Earthquake Soft-sediment deformation structures liquefaction structure Sand volcano Songyuan

Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 195-206页

作者： Hai-Sheng zhao Dong li Shao-lin Xiong Yan-qiu zhang Yang Su wei Chen Yi zhao Xiao-Bo li Jia-Cong liu wen-Xi Peng Rui qiao Xin-qiao li Xiang-Yang wen li-Ming Song Shi-Jie Zheng Xin-Ying Song Xiao-Yun zhao Yue huang Shuang-Nan zhang Shuo Xiao Ce Cai Zheng-hua An Can Chen Gang Chen wei Chen Yan-qi Du Min Gao Ke Gong Dong-Ya Guo Zhi-wei Guo Jian-Jian He Bin li Chao li Chao-Yang li Gang li Jian-Hui li Lu li qing-Xin li Yan-Guo li Jing liang Xiao-hua liang Jin-yuan liao Xiao-Jing liu Ya-qing liu qi Luo Xiang Ma Bin Meng Ge Ou Dong-li Shi Jing-Yan Shi Gong-Xing sun Xi-Lei sun You-li Tuo Chen-wei Wang Hui Wang Jin Wang Jin-Zhou Wang Ping Wang wen-Shuai Wang Hong Wu Sheng-Lun Xie Yan-Bing Xu Yu-Peng Xu Wang-Chen Xue Sheng Yang Min Yao Jian-Ying Ye qi-Bin Yi Chao-Yue zhang Da-li zhang Fan zhang Fei zhang Hong-Mei zhang Kai zhang Peng zhang Xiao-Lu zhang Zhen zhang Guo-Ying zhao Shi-Yi zhao Chao Zheng Xing Zhou Yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China Physics and Space Science College China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Changchun University of Science and TechnologyChangchun 130022China College of Physics and Engineering Qufu Normal UniversityQufu 273165China College of Physics Sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2022 April 21 at 01:52 *** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare