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Low-latitude hydroclimate changes related to paleomagnetic variations during the Holocene in coastal southern China

Frontiers of Earth Science 2024年第2期18卷 324-335页

作者： Tingwei ZHANG Xiaoqiang yang Jian YIN Qiong CHEN Jianfang HU Lu WANG Mengshan JU Qiangqiang WANG School of Earth Science and Engineering/Guangdong Provincial Key Laboratory of Geodynamics and Geohazards/Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yat-sen UniversityGuangzhou 510275China Institute of Cultural Heritage Shandong UniversityQingdao 266237China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

The variations in precipitation have displayed a complex pattern in different regions since the *** formation processes may have a significant impact on precipitation,especially during the tropical marine processes and summer monsoon which convey abundant water vapor to coastal southern China and inland ***,we use two 7500 year sedimentary records from the Pearl River Delta and the closed Maar Lake,respectively,in coastal southern China to reconstruct the mid-to-late-Holocene humidity variability and explore its possible relationship with cloud cover modulated by the Earth’s magnetic fields(EMF).Our proxy records document an apparent increase in wetness in coastal southern China between 3.0 and 1.8 kyr *** apparent increase in humidity appears to be consistent with the lower virtual axial dipole moments and,in turn,with a lower *** correlation suggests that the EMF might have been superimposed on the weakened monsoon to regulate the mid-to-late-Holocene hydroclimate in coastal southern China through the medium of galactic cosmic rays,aerosols,and cloud ***,further investigations are needed to verify this interaction.

关键词： hydroclimate variations Earth’s magnetic field coastal southern China the Holocene epoch

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Low-Enthalpy and High-Entropy Polymer Electrolytes for Li-Metal Battery

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Energy & Environmental Materials 2024年第1期7卷 91-99页

作者： Haitao Zhang Yuchen Wang Junfeng Huang Wen Li Xiankan Zeng Aili Jia Hongzhi Peng Xiong Zhang Weiqing yang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

lonic-conductive solid-state polymer electrolytes are promising for the development of advanced lithium batteries yet a deeper understanding of their underlying ion-transfer mechanism is needed to improve *** we demonstrate the low-enthalpy and high-entropy(LEHE)electrolytes can intrinsically generate remarkably free ions and high mobility,enabling them to efficiently drive lithium-ion *** LEHE electrolytes are constructed on the basis of introducing CsPbl_(3)perovskite quantum dots(PQDs)to strengthen PEO@LiTFSI *** extremely stable cycling>1000 h at 0.3 mA cm^(-2)can be delivered by LEHE ***,the as-developed Li|LEHE|LiFePO_(4)cell retains 92.3%of the initial capacity(160.7 mAh g^(-1))after 200 *** cycling stability is ascribed to the suppressed charge concentration gradient leading to free lithium *** is realized by a dramatic increment in lithium-ion transference number(0.57 vs 0.19)and a significant decline in ion-transfer activation energy(0.14 eV vs 0.22 eV)for LEHE electrolytes comparing with PEO@LiTFSI *** CsPbl_(3)PQDs promote highly structural disorder by inhibiting crystallization and hence endow polymer electrolytes with low melting enthalpy and high structural entropy,which in turn facilitate long-term cycling stability and excellent rate-capability of lithium-metal batteries.

关键词： charge concentration gradient lithium dendrites lithium-metal battery low-enthalpy and high-entropy polymer electrolyte

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Combinatorial Optimization of Physics Parameterization Schemes for Typhoon Simulation Based on a Simple Genetic Algorithm(SGA)

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Journal of Meteorological Research 2024年第1期38卷 10-26页

作者： Zebin LU Jianjun XU Zhiqiang CHEN Jinyi yang Jeremy Cheuk-Hin LEUNG Daosheng XU Banglin ZHANG China Meteorological Administration–Guangdong Ocean University Joint Laboratory for Marine Meteorology South China Sea Institute of Marine MeteorologyGuangdong Ocean UniversityZhanjiang 524088 College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088 Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction China Meteorological AdministrationGuangzhou 510640 Shenzhen Institute of Guangdong Ocean University Shenzhen 518120 College of Atmospheric Science Lanzhou UniversityLanzhou 730000

Each physical process in a numerical weather prediction(NWP)system may have many different parameterization *** studies have shown that the performance of different physical parameterization schemes varies with the weather situation to be ***,it is necessary to select a suitable combination of physical parameterization schemes according to the variation of weather ***,it is rather difficult to identify an optimal combination among millions of possible parameterization scheme *** study applied a simple genetic algorithm(SGA)to optimizing the combination of parameterization schemes in NWP models for typhoon *** feasibility of SGA was verified with the simulation of Typhoon Mujigae(2015)by using the Weather Research and Forecasting(WRF)model and Typhoon Higos(2020)by using the Coupled Ocean–Atmosphere–Wave–Sediment Transport(COAWST)modeling *** results show that SGA can efficiently obtain the optimal combination of *** Typhoon Mujigae(2015),the optimal combination can be found from the 1,304,576 possible combinations by running only 488 *** results can be obtained for Typhoon Higos(2020).Compared to the default combination proposed by the COAWST model system,the optimal combination scheme significantly improves the simulation of typhoon track and *** study provides a feasible way to search for the optimal combinations of physical parameterization schemes in WRF and COAWST for more accurate typhoon *** can help provide references for future development of NWP models,and for analyzing the coordination and adaptability of different physical process parameterization schemes under specific weather backgrounds.

关键词： simple genetic algorithm(SGA) combinatorial optimization typhoon forecast numerical weather prediction(NWP)

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A midgut transcriptional regulatory loop favors an insect host to withstand a bacterial pathogen

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The Innovation 2024年第5期5卷 36-45,35页

作者： Zhaojiang Guo Liuhong Zhu Zhouqiang Cheng Lina Dong Le Guo yang Bai Qingjun Wu shaoli Wang Xin yang Wen Xie Neil Crickmore Xuguo Zhou RenéLafont Youjun Zhang State Key Laboratory of Vegetable Biobreeding Department of Plant ProtectionInstitute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China School of Life Sciences University of SussexBrighton BN19QEUK Department of Entomology School of Integrative BiologyCollege of Liberal Arts&SciencesUniversity of Illinois Urbana-ChampaignUrbanaIL 61801-3795USA Sorbonne Université CNRS-IBPS(BIOSIPE)75005 ParisFrance

Mounting evidence suggests that insect hormones associated with growth and development also participate in pathogen *** have discovered a previously undescribed midgut transcriptional control pathway that modulates the availability of 20-hydroxyecdysone(20E)in a worldwide insect pest(Plutella xylostella),allowing it to defeat the major virulence factor of an insect pathogen Bacillus thuringiensis(Bt).A reduction of the transcriptional inhibitor(PxDfd)increases the expression of a midgut microRNA(miR-8545),which in turn represses the expression of a newly identified ecdysteroid-degrading glucose dehydrogenase(PxGLD).Downregulation of PxGLD reduces 20E degradation to increase 20E titer and concurrently triggers a transcriptional negative feedback loop to mitigate 20E *** moderately elevated 20E titer in the midgut activates a MAPK signaling pathway to increase Bt tolerance/*** findings deepen our understanding of the functions attributed to these classical insect hormones and help inform potential future strategies that can be employed to control insect pests.

关键词： elevated transcriptional loop

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基于LOS导航算法的无人船路径跟踪控制

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舰船科学技术 2024年第5期46卷 109-114页

作者：李少鹏黄利华张磊高阳武汉第二船舶设计研究所湖北武汉430000

为了解决无人船路径跟踪控制问题,提出基于视距导航算法(LOS导航算法)和模糊PID控制的自适应无人船路径跟踪控制方法。首先根据LOS算法将路径跟踪问题转化为航向控制问题,之后通过模糊PID控制算法进行无人船的航向控制。通过仿真表明所... 详细信息

为了解决无人船路径跟踪控制问题,提出基于视距导航算法(LOS导航算法)和模糊PID控制的自适应无人船路径跟踪控制方法。首先根据LOS算法将路径跟踪问题转化为航向控制问题,之后通过模糊PID控制算法进行无人船的航向控制。通过仿真表明所提出的算法路径跟踪精度高,横向偏移量小,跟踪路径平滑,对无人船的路径跟踪控制有一定的参考价值。

关键词：无人船 LOS 路径跟踪 PID

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基于改进YOLOv5s的CNN-Swin Transformer森林野生动物图像目标检测算法

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林业科学 2024年第3期60卷 121-130页

作者：杨文翰刘天宇周俊池胡文武蒋蘋湖南农业大学机电工程学院长沙410128

【目的】为提高野生动物在复杂森林环境中的检测精度,促进森林野生动物保护技术发展,提出一种基于YOLOv5s网络模型、针对陷阱相机所摄取森林野生动物图像的改进检测算法。【方法】以包含湖南壶瓶山国家级自然保护区几种典型森林野生动... 详细信息

【目的】为提高野生动物在复杂森林环境中的检测精度,促进森林野生动物保护技术发展,提出一种基于YOLOv5s网络模型、针对陷阱相机所摄取森林野生动物图像的改进检测算法。【方法】以包含湖南壶瓶山国家级自然保护区几种典型森林野生动物在内的数据集为研究对象,首先,对真实标注框图像进行裁剪、归一化和缩放处理,随机将2~4张裁剪图像拼贴组成新的数据集元素,以丰富和增强数据集图像信息;其次,使用一种基于通道注意力思想的加权通道拼接方法,在通道拼接时引入权重改变通道数量,通过反向传播训练方法不断更新权重以增加重要特征信息的通道层数;接着,引入Swin Transformer模块与CNN网络相结合,为卷积神经网络特征提取加入自注意力机制,融合2种网络特征提取层的优势,提高特征提取的感受野;最后,选择更优的α-DIoU损失函数替代GIoU损失函数,针对边界框重叠面积和中心点距离造成的损失,引入新的几何因素惩罚项。【结果】在相同试验条件和数据集下,相比原YOLOv5s网络模型,改进算法极大提高检测的平均准确率和平均回归率,均值平均精度由74.1%提升至88.4%,获得14.3%的精度提升,同时也超过YOLOv3、YOLOXs、RetinaNet、Faster R-CNN等其他流行目标检测算法。【结论】针对陷阱相机所摄取森林野生动物图像背景与目标对比度低、遮挡重叠严重,致使检测误检率、漏检率高等问题,在检测算法中提出一系列改进措施,为我国森林野生动物的保护和数据获取提供一种新的可行性方案和思路。

关键词：森林野生动物检测算法 YOLOv5s Swin Transformer 网络融合

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The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-Yun Zhao shao-Lin Xiong Xiang-yang Wen Xin-Qiao Li Ce Cai Shuo Xiao Qi Luo Wen-Xi Peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-Yuan Liao Yan-Qiu Zhang Yue Huang Lu Li Xing Wen Fei Zhang Jing Duan Chen-Wei Wang Dong-Li Shi Peng Zhang Qi-Bin Yi Chao-yang Li Yan-Bing Xu Xiao-Hua Liang Ya-Qing Liu Da-Li Zhang Xi-Lei Sun Fan Zhang Gang Chen Huan-Yu Wang Sheng yang Xiao-Jing Liu Min Gao Mao-Shun Li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong Liu Xing-Bo Han Jin-Ling Qi Jia Huang Ke-Ke Zhang Can Chen Xiong-Tao yang Dong-Jie Hou Yu-Sa Wang Rui Qiao Xiang Ma Xiao-Bo Li ping Wang Xin-Ying Song Li-Ming Song Shi-Jie Zheng Bing Li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-Jun Wang Yan-Chao Hao Xiang-Yu Wang Zong-Yuan yang Zhi-Long Wen Zhi Chang Yuan-Yuan Du Rui Gao Xiao-Fei Lan Yan-Guo Li Gang Li Xu-Fang Li Fang-Jun Lu Hong Lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-Peng Xu Jia-Wei yang Xue-Juan yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun University of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

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路侧多传感器融合中的联合标定优化设计

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同济大学学报（自然科学版） 2024年第11期52卷 1750-1757页

作者：佘锋杨贵永刘建虎王平吉利汽车研究院浙江宁波315336 同济大学电子与信息工程学院上海201804

在路侧感知中,交通场景复杂多变,单类传感器无法满足全天候、全天时工作的要求,多传感器融合逐渐成为发展趋势,而多传感器融合的前提是实现传感器之间的联合标定。在激光雷达和相机的共视区内摆放标定物,从而获得特征点的点云坐标和对... 详细信息

在路侧感知中,交通场景复杂多变,单类传感器无法满足全天候、全天时工作的要求,多传感器融合逐渐成为发展趋势,而多传感器融合的前提是实现传感器之间的联合标定。在激光雷达和相机的共视区内摆放标定物,从而获得特征点的点云坐标和对应像素坐标,再使用EPnP(Efficient Perspective-n-Points)算法求得激光雷达和相机之间的外参;对激光雷达路面的点云进行上采样,根据联合标定的外参矩阵生成对应的像素坐标,然后采用决策树回归、随机森林回归算法训练模型;根据激光雷达标定的结果实现像素坐标到WGS84坐标的转换,该方法不需要将激光雷达和相机集成在一起。最后,经实验验证该联合标定方案的有效性。

关键词：联合标定路侧感知多传感器融合车路协同

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Cancer stem cell-immune cell crosstalk in the tumor microenvironment for liver cancer progression

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Frontiers of Medicine 2024年第3期18卷 430-445页

作者： Yue Ma Hongwei Lv Fuxue Xing Wei Xiang Zixin Wu Qiyu Feng Hongyang Wang Wen yang Cancer Research Center First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei230027China National Center for Liver Cancer Naval Medical University(Second Military Medical University)Shanghai201805China International Co-operation Laboratory on Signal Transduction Eastern Hepatobiliary Surgery HospitalNaval Medical University(Second Military Medical University)Shanghai200438China Shanghai Key Laboratory of Hepato-biliary Tumor Biology Shanghai200438China Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer Ministry of EducationShanghai200438China

Crosstalk between cancer cells and the immune microenvironment is determinant for liver cancer progression.A tumor subpopulation called liver cancer stem cells(CSCs)significantly accounts for the initiation,metastasis,therapeutic resistance,and recurrence of liver *** evidence demonstrates that the interaction between liver CSCs and immune cells plays a crucial role in shaping an immunosuppressive microenvironment and determining immunotherapy *** review sheds light on the bidirectional crosstalk between liver CSCs and immune cells for liver cancer progression,as well as the underlying molecular mechanisms after presenting an overview of liver CSCs characteristic and their ***,we discuss the potential application of liver CSCs-targeted immunotherapy for liver cancer treatment.

关键词： liver cancer cancer stem cell immune cell immunotherapy

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转型与重构:清末及民国时期上海书画市场研究

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江苏师范大学学报（哲学社会科学版） 2024年第4期50卷 48-58,123页

作者：杨莉萍江苏师范大学历史文化与旅游学院江苏徐州221116

清末民国时期的上海是中西方文化碰撞交汇之地,其书画艺术品交易的市场化程度出现了近代化转型。将书画市场置于社会史、经济史和美术史的多重视角中,分析上海书画交易主体、交易场所及交易方式的变革,可以探究清末民国上海书画市场的... 详细信息

清末民国时期的上海是中西方文化碰撞交汇之地,其书画艺术品交易的市场化程度出现了近代化转型。将书画市场置于社会史、经济史和美术史的多重视角中,分析上海书画交易主体、交易场所及交易方式的变革,可以探究清末民国上海书画市场的转型及其运行机制中呈现出现代市场经济的特征。清末民国上海书画市场的转型受社会变迁、经济发展和文化繁荣的影响,也改变了人们的消费观念、文化心理与结构形态,促进了当地艺术经济的发展与繁荣。清末民国上海书画市场在中国艺术市场史中具有引领转折的重要地位,对当代艺术市场运行机制的研究具有重要的借鉴意义。

关键词：上海书画市场市场转型艺术品收藏

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