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Impact crater recognition methods:A review

Science China Earth Sciences 2024年第6期67卷 1719-1742页

作者： Dong CHEN fan hu Liqiang ZHANG Yunzhao WU Jianli DU Jiju PEETHAMBARAN College of Civil Engineering Nanjing Forestry UniversityNanjing 210037China Department of Geography State Key Laboratory of Remote Sensing ScienceFaculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Key Laboratory of Space Object and Debris Observation Chinese Academy of SciencesNanjing 210023China Department of Mathematics and Computing Science Saint Mary’s UniversityHalifaxNS B3H 3C3Canada

Impact craters are formed due to the high-speed collisions between small to medium-sized celestial bodies.Impact is the most significant driving force in the evolution of celestial bodies,and the impact craters provide crucial insights into the formation,evolution,and impact history of celestial bodies.In this paper,we present a detailed review of the characteristics of impact craters,impact crater remote sensing data,recognition algorithms,and applications related to impact craters.We first provide a detailed description of the geometric texture,illumination,and morphology characteristics observed in remote sensing data of craters.Then we summarize the remote sensing data and cataloging databases for the four terrestrial planets(i.e.,the Moon,Mars,Mercury,and Venus),as well as the impact craters on Ceres.Subsequently,we study the advancement achieved in the traditional methods,machine learning methods,and deep learning methods applied to the classification,segmentation,and recognition of impact craters.Furthermore,based on the analysis results,we discuss the existing challenges in impact crater recognition and suggest some solutions.Finally,we explore the implementation of impact crater detection algorithms and provide a forward-looking perspective.

关键词： Terrestrial planets Deep space exploration Impact crater Impact crater recognition Deep learning

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Review on research and development of oxy-coal burner for carbon capture

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Science China(Technological Sciences) 2024年第3期67卷 647-672页

作者： GUO JunJun LIU JingZhang ZHANG Tai hu fan LI PengFei LIU Zhaohui ZHENG ChuGuang State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and Technology Wuhan 430074China CCRC King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal Beijing 100049China Institute of Energy Research Jiangxi Academy of SciencesNanchang 330096China Carbon Neutrality Research Center of Jiangxi Province Nanchang 330096China Faculty of Engineering China University of Geosciences(Wuhan)Wuhan 430074China National Energy Research and Development Center of Clean and Low Carbon Coal-based Power Generation Technologies Wuhan 430074China

In the past two decades, the oxy-fuel combustion of pulverized coal has been extensively developed, leading to the completion of several large industrial pilot oxy-fuel plants worldwide. Various types of oxy-fuel burners have been designed and tested in largescale pilot plants as key components of oxy-fuel combustion. These burners face major challenges in terms of their flame stability because of their decreasing stream momentum ratio and increasing carbon dioxide concentration. However, it offers flexibility in adjusting the oxygen concentration in each burner stream. This study aims to provide a comprehensive review of the state-of-the-art knowledge on oxy-coal burner design and operation in power plants. First, the combustion characteristics under oxy-fuel conditions are briefly introduced. Subsequently, the principal requirements and fundamental parameters of the oxy-coal burners are discussed. The development process of oxy-fuel burners is also presented. Moreover, a compatible design strategy and scaling-up techniques are described for oxy-coal burners developed by the authors over the past ten years. The performances of oxy-coal burners in three large pilot oxy-fuel plants worldwide are summarized and compared. Finally, concluding remarks are provided and potential research needs are suggested.

关键词： carbon capture oxy-fuel combustion oxy-fuel burner pulverized coal compatible design

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Circular RNAs:implications of signaling pathways and bioinformatics in human cancer

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Cancer Biology & Medicine 2023年第2期20卷 104-128页

作者： fan hu Yin Peng Xinmin fan Xiaojing Zhang Zhe Jin Guangdong Provincial Key Laboratory of Genome Stability and Disease Prevention and Regional Immunity and Diseases Department of PathologySchool of Basic Medical SciencesMedical SchoolShenzhen UniversityShenzhen 518060China

Circular RNAs(circRNAs)form a class of endogenous single-stranded RNA transcripts that are widely expressed in eukaryotic cells.These RNAs mediate post-transcriptional control of gene expression and have multiple functions in biological processes,such as transcriptional regulation and splicing.They serve predominantly as microRNA sponges,RNA-binding proteins,and templates for translation.More importantly,circRNAs are involved in cancer progression,and may serve as promising biomarkers for tumor diagnosis and therapy.Although traditional experimental methods are usually time-consuming and laborious,substantial progress has been made in exploring potential circRNA-disease associations by using computational models,summarized signaling pathway data,and other databases.Here,we review the biological characteristics and functions of circRNAs,including their roles in cancer.Specifically,we focus on the signaling pathways associated with carcinogenesis,and the status of circRNA-associated bioinformatics databases.Finally,we explore the potential roles of circRNAs as prognostic biomarkers in cancer.

关键词： circRNA cancer signaling pathway database bioinformatics

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The Power of the Desert

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China Today 2024年第5期73卷 36-38页

作者： hu fan 不详

New mega energy base propels the transformation of Kubuqi Desert into a source of economic growth.DALAD Banner in Ordos,Inner Mongolia Autonomous Region in north China,is characterized by a seemingly endless stretch of barren land.Kubuqi,China’s seventh-largest desert,occupies nearly one-third of the county-equivalent banner’s land area.

关键词： Desert Banner county

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Correction:Cognitive Impairment in Idiopathic Normal Pressure Hydrocephalus

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Neuroscience Bulletin 2022年第9期38卷 1121-1122页

作者： Haoyun Xiao fan hu Jing Ding Zheng Ye Institute of Neuroscience Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China University of Chinese Academy of Sciences Beijing100049China Department of Neurosurgery Zhongshan HospitalFudan UniversityShanghai200032China Department of Neurology Zhongshan HospitalFudan UniversityShanghai200032China

Idiopathic normal pressure hydrocephalus (iNPH) is a significant cause of the severe cognitive decline in the elderly population. There is no cure for iNPH, but cognitive symptoms can be partially alleviated through cerebrospinal fluid (CSF) diversion. In the early stages of iNPH, cognitive deficits occur primarily in the executive functions and working memory supported by frontostriatal circuits. As the disease progresses, cognition declines continuously and globally, leading to poor quality of life and daily functioning. In this review, we present recent advances in understanding the neurobiological mechanisms of cognitive impairment in iNPH, focusing on (1) abnormal CSF dynamics, (2) dysfunction of frontostriatal and entorhinal-hippocampal circuits and the default mode network, (3) abnormal neuromodulation, and (4) the presence of amyloid-β and tau pathologies.

关键词： Idiopathic normal pressure hydrocephalus Cognitive impairment Cerebrospinal fluid dynamics Frontostriatal circuits Entorhinal-hippocampal circuits Neuromodulation Amyloid-β pathology Tau pathology

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Boundless Potential China-Africa cooperation in the space sector exemplifies mutually beneficial partnerships

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ChinAfrica 2024年第5期16卷 18-19页

作者： hu fan 不详

Exports of Chinese satellites,joint construction of space infrastructure,and joint research and development of satellites...The recent years have seen substantial growth in China-Africa cooperation in the space sector... 详细信息

关键词： mutually bringing cooperation

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Sowing for A Green Future

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ChinAfrica 2024年第4期16卷 36-37页

作者： hu fan Yichang

Students and volunteers participating in a tree-planting activity at an islet in the Yangtze River on 12 March,the National Tree Planting Day,witnessed the return of two rare species to their native habitat.Artificial... 详细信息

关键词： return islet Yangtze

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In the Fast Lane China’s NEV industry has built a solid platform for rapid growth

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ChinAfrica 2024年第5期16卷 48-49页

作者： hu fan 不详

China’s crowded and fiercely competitive new energy vehicle(NEV)market has got yet another player.In a closely watched move,tech major Xiaomi launched its first NEV model SU7 on 28 March.

关键词： competitive industry has

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Dashing on Two Wheels

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ChinAfrica 2024年第6期16卷 27-29页

作者： hu fan TORINMO SALAU 不详

In Nigeria,commercial motorcycles,or okada,are an important means of transport for the public and provide jobs to millions of riders.As the country promotes a transition to e-mobility,more electric motorcycles are being introduced to the sector,bringing not only environmental benefits,but also economic benefits to riders.Vincent Onyekachi in Lagos is one of these riders,who believes the electric motorcycle is much better because it helps him to save money spent on fuel and constant repair.“My former okada was always having issues and I was spending so much money to fix it,but this electric motorcycle does not create any stress.I am able to save now;before I did not have any savings,”he told ChinAfrica.

关键词： money bringing benefits

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Illuminating Outing

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ChinAfrica 2024年第7期16卷 52-55页

作者： hu fan ZHOU ShuYI 不详

Young Africans get inspiration,foster friendship during visit to China for cultural exchange event When the young Africans visiting China to attend the 8th China-Africa Youth Festival were offered the choice of a seven-hour bullet train ride or a twohour plane journey to travel from Beijing to the city of Jinhua in east China’s Zhejiang Province,they chose the train.

关键词： travel African foster

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