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Coseismic deformation and fault slip distribution of the 2023 M_(W)7.8 and M_(W)7.6 earthquakes in Türkiye

Earthquake Science 2024年第3期37卷 263-276页

作者： Weikang Li Lijiang Zhao Kai Tan xiaofei lu Caihong Zhang Chengtao Li Shuaishuai Han Institute of Seismology China Earthquake AdministrationWuhan 430071China Wuhan Gravitation and Solid Earth Tides National Observation and Research Station Wuhan 430071China School of Geological Engineering and Geomatics Chang'an UniversityXi'an 710054China

On February 6,2023,a devastating earthquake with a moment magnitude of M_(W)7.8 struck the town of Pazarcik in south-central Türkiye,followed by another powerful earthquake with a moment magnitude of M_(W)7.6 that struck the nearby city of Elbistan 9 h *** study the characteristics of surface deformation caused by this event and the influence of fault rupture,this study calculated the static coseismic deformation of 56 stations and dynamic displacement waveforms of 15 stations using data from the Turkish national fixed global navigation satellite system(GNSS)network.A maximum static coseismic displacement of 0.38 m for the M_(W)7.8 Kahramanmaras earthquake was observed at station ANTE,36 km from the epicenter,and a maximum dynamic coseismic displacement of 4.4 m for the M_(W)7.6 Elbistan earthquake was observed at station EKZ1,5 km from the *** rupture-slip distributions of the two earthquakes were inverted using GNSS coseismic deformation as a *** results showed that the Kahramanmaras earthquake rupture segment was distinct and exposed on the ground,resulting in significant rupture slip along the Amanos and Pazarcik fault segments of the East Anatolian *** maximum slip in the Pazarcik fault segment was 10.7 m,and rupture occurred at depths of 0–15 *** the Cardak fault region,the Elbistan earthquake caused significant ruptures at depths of 0–12 km,with the largest amount of slip reaching 11.6 *** Coulomb stress change caused by the Kahramanmaras earthquake rupture along the Cardak fault segment was approximately 2 bars,and the area of increased Coulomb stress corresponded to the subsequent rupture region of the M_(W)7.6 ***,it is likely that the M_(W)7.8 earthquake triggered or promoted the M_(W)7.6 *** on the cumulative stress impact of the M_(W)7.8 and M_(W)7.6 events,the southwestern segment of the East Anatolian Fault,specifically the Amanos fault segment,experienced a Coulomb rupture stress change exc

关键词： 2023 Türkiye earthquake GNSS observation coseismic deformation field slip distribution

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Large potential of strengthening the land carbon sink in China through anthropogenic interventions

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Science Bulletin 2024年第16期69卷 2622-2631页

作者： Xu Yue Hao Zhou Yang Cao Hong Liao xiaofei lu Zhen Yu Wenping Yuan Zhu Liu Yadong Lei Stephen Sitch Jürgen Knauer Huijun Wang Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&Technology(NUIST)Nanjing 210044China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Jiangsu Nanjing Environmental Monitoring Center Nanjing 210013China Key Laboratory of Agrometeorology of Jiangsu Province Institute of EcologySchool of Applied MeteorologyNUISTNanjing 210044China Institute of Carbon Neutrality Sino-French Institute for Earth System ScienceCollege of Urban and Environmental SciencesPeking UniversityBeijing 100871China Department of Earth System Science Tsinghua UniversityBeijing 100084China State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological SciencesBeijing 100081China College of Life and Environmental Sciences University of ExeterExeter EX44RJUK Hawkesbury Institute for the Environment Western Sydney UniversityPenrith 2751Australia Key Laboratory of Meteorological Disaster Ministry of EducationJoint International Research Laboratory of Climate and Environment ChangeCollaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNUISTNanjing 210044China

The terrestrial ecosystem in China mitigates 21%-45%of the national contemporary fossil fuel CO_(2) emissions every *** and strengthening the land carbon sink is essential for reaching China’s target of carbon ***,this sink is subject to large uncertainties due to the joint impacts of climate change,air pollution,and human ***,we explore the potential of strengthening land carbon sink in China through anthropogenic interventions,including forestation,ozone reduction,and litter removal,taking advantage of a well-validated dynamic vegetation model and meteorological forcings from 16 climate *** anthropogenic interventions,considering Shared Socioeconomic Pathways(SSP)scenarios,the land sink is projected to be 0.26-0.56 Pg C a^(-1) at 2060,to which climate change contributes 0.06-0.13 Pg C a^(-1) and CO_(2) fertilization contributes 0.08-0.44 Pg C a^(-1) with the stronger effects for higher emission *** anthropogenic interventions,under a close-to-neutral emission scenario(SSP1-2.6),the land sink becomes 0.47-0.57 Pg C a^(-1) at 2060,including the contributions of 0.12 Pg C a^(-1) by conservative forestation,0.07 Pg C a^(-1) by ozone pollution control,and 0.06-0.16 Pg C a^(-1) by 20%litter removal over planted *** sink can mitigate 90%-110% of the residue anthropogenic carbon emissions in 2060,providing a solid foundation for the carbon neutrality in China.

关键词： Carbon sink Forestation Ozone Litter removal

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氮添加对中国陆地植被地上-地下生物量分配的影响

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生态学报 2024年第4期44卷 1313-1323页

作者：陆啸飞郭洁芸王斌乐旭南京信息工程大学环境科学与工程学院江苏省大气环境监测与污染控制高技术研究重点实验室大气环境与装备技术协同创新中心南京210044 南京大学生命科学学院生态学系南京210023 中国科学院退化生态系统植被恢复与管理院重点实验室广州510650

大气氮沉降水平持续升高导致的外源氮输入增加,强烈影响了陆地生态系统的碳循环。目前,已有大量报道证实了氮沉降升高对全球陆地植被固碳的积极影响。虽然之前大部分研究将这一结果归因于光合作用增强导致的地上生物量增加,但最近的研... 详细信息

大气氮沉降水平持续升高导致的外源氮输入增加,强烈影响了陆地生态系统的碳循环。目前,已有大量报道证实了氮沉降升高对全球陆地植被固碳的积极影响。虽然之前大部分研究将这一结果归因于光合作用增强导致的地上生物量增加,但最近的研究发现长期氮添加对植物地下根系的影响也同样重要。归纳整理了181篇公开发表的我国野外模拟氮沉降试验结果,采用整合分析(Meta-analysis)方法,定量评估了氮添加对我国陆地植被地上-地下生物量分配的影响特征和不同生态系统类型及施氮方式之间的影响差异。通过分析地上-地下生物量分配对氮添加的响应差异来探究植被碳增益对长期大气氮沉降增加的潜在响应机制。结果表明,氮添加显著增强了我国陆地植被的光合作用及碳固存,且植物碳增益在不同生态系统类型及施氮制度间有所差异。植物叶片的氮含量显著增加,使得叶片碳氮比及凋落物碳氮比显著降低,但并未显著影响细根的碳氮比。氮添加总体上显著提高了植物的净光合速率,但降低了光合利用效率。地上生物量,凋落物产量和根生物量平均分别显著增加了38%,17%和18%,总体上植物地上部分对氮添加的响应程度比地下部分更高。然而,不同生态系统类型的地上-地下生物量分配对氮添加的响应并不一致。在受氮限制的温带森林及草地生态系统,地上生物量显著增加而根生物量的变化并不显著,但是在富氮的亚热带森林则相反,氮添加显著增加了根生物量而地上生物量增长不显著。回归分析表明,地上生物量并不随着根生物量的增加而线性增加,反而呈现先增加后降低的趋势。此外,植物的净光合速率和光合氮利用效率随着叶片氮含量的增加,也呈现先增加后降低的趋势。这暗示着大气氮沉降增加下的植物的碳分配策略是变化的,随着外源氮添加的持续输入,植物会由优先向地上部分配更多的碳来促进地上生物量的增加,转为向根系投入更多的碳来促进根系生长来获取其他资源。总之,本研究认为植物地上和地下生物量增长之间的非线性关系可能会影响对陆地生态系统碳增益的预测,未来的研究应该充分考虑长期大气氮沉降下植物生物量分配策略的变化。

关键词：生物量整合分析大气氮沉降陆地生态系统碳分配策略

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中国大学英语学习者词汇流利性和丰富性的损耗研究

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外语教学与研究 2024年第3期56卷 394-404,479,480页

作者：潘克菊杨连瑞陆小飞中国海洋大学宾夕法尼亚州立大学

提升学习者的词汇水平是大学英语教学的重要目标之一,而目前对于大学英语学习结束后学习者词汇损耗的研究仍相对缺乏。本研究结合动态系统论,跟踪调查学习者在四个阶段二语词汇流利性和丰富性的损耗情况,以期揭示词汇发展与损耗过程的... 详细信息

提升学习者的词汇水平是大学英语教学的重要目标之一,而目前对于大学英语学习结束后学习者词汇损耗的研究仍相对缺乏。本研究结合动态系统论,跟踪调查学习者在四个阶段二语词汇流利性和丰富性的损耗情况,以期揭示词汇发展与损耗过程的本质特征。受试在大学英语学习刚结束(T1)时以及结束3个月(T2)、6个月(T3)和9个月(T4)时分别完成词汇流利性测试、口语话题任务和电影复述任务。研究者对所得数据进行词汇流利性与丰富性的指标分析与统计分析。结果发现:(1)在二语词汇流利性方面,T2时受试出现明显损耗,T3时逐步恢复,T4时有一定提升;(2)在二语词汇丰富性方面,词汇密度各项指标在T1至T4时的口语话题任务和电影复述任务中均无显著差异,词汇复杂性在口语话题任务中差异显著,词汇多样性在两种任务中都有显著差异。本研究的发现对于目前的大学外语教学具有重要的启示作用。

关键词：词汇损耗词汇流利性词汇丰富性动态系统论

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基于孪生网络和Transformer的红外弱小目标跟踪方法

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计算机应用 2024年第2期44卷 563-571页

作者：崔晨辉蔺素珍李大威禄晓飞武杰中北大学计算机科学与技术学院太原030051 中北大学电气与控制工程学院太原030051 酒泉卫星发射中心甘肃酒泉735000

针对红外弱小目标跟踪准确性较低这一问题,提出一种基于孪生网络和Transformer的红外弱小目标跟踪方法。首先,构建多特征提取级联模块分别提取红外弱小目标模板帧和搜索帧的深度特征,并将二者分别与其对应的HOG特征进行维度层面的串联;... 详细信息

针对红外弱小目标跟踪准确性较低这一问题,提出一种基于孪生网络和Transformer的红外弱小目标跟踪方法。首先,构建多特征提取级联模块分别提取红外弱小目标模板帧和搜索帧的深度特征,并将二者分别与其对应的HOG特征进行维度层面的串联;其次,引入多头注意力机制Transformer进行模板特征图和搜索特征图的互相关操作,生成响应图;最后,通过响应图上采样网络和边界框预测网络,获得目标在图像的中心位置和回归边界框,完成对红外弱小目标的跟踪。在包含13655张红外图像数据集上的测试结果表明:与KeepTrack跟踪方法相比,成功率提高5.9个百分点,精确率提高1.8个百分点;与TransT(Transformer Tracking)方法相比,成功率提高14.2个百分点,精确率提高14.6个百分点,证明所提方法对复杂背景下的红外弱小目标跟踪准确性更高。

关键词：目标跟踪红外弱小目标孪生网络 Transformer 多特征提取

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Identification and Analysis of WRKY Transcription Factors in Response to Cowpea Fusarium Wilt in Cowpea

Identification and Analysis of WRKY Transcription Factors in...

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中国植物病理学会2024年学术年会

作者： HAO Yali LIU Rui CHEN Guohua YANG Qihong ZHENG Shijie lu xiaofei YANG Yuhong XIE Bingyan ZHAO Jianlong LI Yan MAO Zhenchuan LING Jian

In plant,WRKY transcription factors play a crucial role in plant growth,development,and response to abioticand ***(Vigna unguiculata) is an important legume ***,cowpea Fusarium wilt(CFW),caused by Fusarium oxysporum ***(Fot),poses a serious threat to its *** this study,we systematically identified members of the cowpea WRKY(VuWRKY) gene family and analyzed their expression patterns under cowpea wilt disease *** results revealed that a total of 91 WRKY transcription factors were identified in cowpea genome,and VuWRKY genes can be classed into three groups based on their conserved WRKY *** synteny analysis indicated that the expansion of VuWRKY genes in cowpea is mainly dependent on recent duplication *** data from cowpea roots inoculated with Fo showed differential expression in 31 VuWRKY genes,with 27 upregulated and 4 downregulated genes,indicating their significant role in the cowpea response to CFW *** selected differentially-expressed WRKY genes were used for downstream functional *** localization revealed that all four VuWRKY genes were localized in the cell *** blot analysis demonstrated successful expression of these genes in *** ***,yeast one-hybrid assays indicated that VuWRKY2 can bind to the promoter region of the Catalase(CAT) gene,suggesting their potential involvement in transcriptional *** study establishes a foundation for further exploration of the role and regulatory mechanisms of VuWRKY genes in response to CFW stress.

关键词： Cowpea Cowpea fusarium wilt WRKY Fusarium oxyporum Transcription regulation Expression profiling

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Approach for ISAR imaging of near-field targets based on coordinate conversion and image interpolation

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Journal of Systems Engineering and Electronics 2021年第2期32卷 425-436页

作者： ZHOU Xingyu WANG Yong lu xiaofei School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China Jiuquan Satellite Launch Center Jiuquan 732750China

Inverse synthetic aperture radar(ISAR)imaging of near-field targets is potentially useful in some specific applications,which makes it very important to efficiently produce highquality image of the near-field *** this paper,the simplified target model with uniform linear motion is applied to the near-field target imaging,which overcomes the complexity of the traditional near-field imaging *** to this signal model,the method based on coordinate conversion and image interpolation combined with the range-Doppler(R-D)algorithm is proposed to correct the near-field distortion *** with the back-projection(BP)algorithm,the proposed method produces better focused ISAR images of the near-field target,and decreases the computation complexity *** results of the simulated data have demonstrated the effectiveness and robustness of the proposed method.

关键词： inverse synthetic aperture radar(ISAR) near-field imaging image interpolation back-projection(BP)algorithm

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Distributed inverse synthetic aperture radar imaging of ship target with complex motion

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1325-1337页

作者： ZHANG Junqiu WANG Yong lu xiaofei School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China Jiuquan Satellite Launch Center Jiuquan 732750China

For ship targets with complex motion,it is difficult for the traditional monostatic inverse synthetic aperture radar(ISAR)imaging to improve the cross-range resolution by increasing of accumulation *** this paper,a distributed ISAR imaging algorithm is proposed to improve the cross-range resolution for the ship *** stations are used to observe the target in a short time,thereby the effect of incoherence caused by the complex motion of the ship can be *** signal model of ship target with three-dimensional(3-D)rotation is constructed *** detailed analysis about the improvement of crossrange resolution is ***,we propose the methods of parameters estimation to solve the problem of the overlap or gap,which will cause a loss of resolution and is necessary for subsequent ***,the compressed sensing(CS)method is applied to reconstruct the echoes with ***,numerical simulations are presented to verify the effectiveness and the robustness of the proposed algorithm.

关键词： complex motion distributed inverse syntheic aperture radar(ISAR) parameters estimation compressed sensing(CS)

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An approach of motion compensation and ISAR imaging for micro-motion targets

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Journal of Systems Engineering and Electronics 2021年第1期32卷 68-80页

作者： WANG Yong ZHOU Xingyu lu xiaofei LI Yajun School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China Jiuquan Satellite Launch Center Jiuquan 732750China Shanghai Radio Equipment Research Institute Shanghai 201109China

Inverse synthetic aperture radar(ISAR)imaging of the target with the non-rigid body is very important in the field of radar signal *** this paper,a motion compensation method combined with the preprocessing and global technique is proposed to reduce the influence of micro-motion components in the fast time domain,and the micro-Doppler(m-D)signal in the slow time domain is separated by the improved complex-valued empirical-mode decomposition(CEMD)algorithm,which makes the m-D signal more effectively distinguishable from the signal for the main body by translating the target to the Doppler ***,a better focused ISAR image of the target with the non-rigid body can be obtained *** of the simulated and raw data demonstrate the effectiveness of the algorithm.

关键词： inverse synthetic aperture radar(ISAR) micro-Doppler(m-D) motion compensation complex-valued empiricalmode decomposition(CEMD)

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农村黑臭水体综合评估方法

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环境工程学报 2024年第5期18卷 1301-1307页

作者：彭佳华鹿晓菲史斌蔡文倩胡明王军强沈阳建筑大学市政与环境工程学院沈阳110168 中国科学院生态环境研究中心北京100085 生态环境部土壤与农业农村生态环境监管技术中心北京100012 中国地质调查局自然资源综合调查指挥中心北京100055

农村黑臭水体的排查是美丽乡村建设的重要环节。以河南省周口市3个县的141个农村黑臭水体为评估对象,运用相关性分析、多元回归分析以及识别结果敏感性分析等方法,探索并建立了一种新的农村黑臭水体评估方法。结果表明,相较于传统的指南... 详细信息

农村黑臭水体的排查是美丽乡村建设的重要环节。以河南省周口市3个县的141个农村黑臭水体为评估对象,运用相关性分析、多元回归分析以及识别结果敏感性分析等方法,探索并建立了一种新的农村黑臭水体评估方法。结果表明,相较于传统的指南法,新方法在黑臭水体的判别上更为精确。指南法在一般水体的评估上适用,但在评价黑臭程度的水体时,各评价指标的分歧较大,真阳性率较低。新方法考虑了农村黑臭水体的形成原因,将指南法中的溶解氧(DO)替换为总磷(TP),并提出了一种“感官+NH3-N+TP”融合的综合评价方法,更符合农村黑臭水体的实际情况。新方法的黑臭水体评估准确率(AUC)为0.86,显著高于指南法的0.71。新方法快速、简洁且贴近实际,为我国广大农村地区黑臭水体的识别和下一步的治理提供了可靠的依据。

关键词：农村黑臭水体综合评价多元回归分析灵敏度受试者工作特征曲线

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