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Geodesy and Geodynamics 2023年第6期14卷 541-550页

作者： Qiang Zhao fengyun jiang Liangyu Zhu Jing Xu The Second Monitoring and Application Center of China Earthquake Administration Xi'an 713700China

On January 8,2022,a 6.9 magnitude earthquake occurred in Menyuan County,Qinghai Province,with the epicenter located at the intersection of the Tuolaishan Fault and the Lenglongling Fault,which are part of the Qilian—Haiyuan fault *** study investigated the sliding characteristics and seismic mechanism of the earthquake to understand the activity and seismic risk of the fault on the northeastern margin of the Qinghai—Tibet *** paper analyzed Sentinel-1 synthetic aperture radar images to obtain the coseismic deformation field of the earthquake,which was then used to invert the slip distribution of the seismogenic fault and the coseismic Coulomb stress on the surrounding faults caused by the *** was found that the earthquake was primarily characterized by sinistral strike-slip *** the satellite line of sight,the south wall of the fault had a maximum deformation of 0.62 m,and the north wall had a maximum deformation of 0.48 *** coseismic slip distribution results indicated that the maximum slip of the earthquake was 4.51 m,and the moment magnitude was *** Coulomb stress analysis showed that the 2016 Menyuan earthquake promoted the occurrence of the 2022Menyuan earthquake.

关键词： Geodesy Coseismic deformation InSAR technology Inversion Coulomb stress Lenglongling fault Fault movement Menyuan earthquake

基于GPS数据分析巴颜喀拉块体边界强震活动特征

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地震研究 2024年第3期47卷 405-418页

作者：李宁季灵运蒋锋云朱良玉刘传金中国地震局第二监测中心陕西西安710054 国家遥感中心地质灾害研究部北京100036 防灾科技学院地球科学学院河北三河065201

基于巴颜喀拉块体边界大地震序列,运用多弹簧滑块系统理论分析未来各边界断裂发生强震的可能时间;基于1991—2016年中国大陆GPS水平速度场数据,采用均匀弹性块体模型计算了巴颜喀拉块体各边界断裂带的长期活动特征,并以此作为参考背景,... 详细信息

基于巴颜喀拉块体边界大地震序列,运用多弹簧滑块系统理论分析未来各边界断裂发生强震的可能时间;基于1991—2016年中国大陆GPS水平速度场数据,采用均匀弹性块体模型计算了巴颜喀拉块体各边界断裂带的长期活动特征,并以此作为参考背景,计算了1999—2007、2009—2013、2013—2015、2015—2017、2017—2020年各边界断裂带的活动性质及时空演化特征,同时结合1995年以来发生在各边界断裂带上的M≥7.0地震震源机制解综合分析强震活动与块体运动的关系。结果表明:1995年以来发生在块体各边界断裂带上的M≥7.0地震震源机制与块体边界的运动特征一致,这一系列地震可能是由巴颜喀拉块体向E—SE向运动增强所致。综合块体边界大震序列与块体相对运动结果认为,未来十年,甘孜—玉树断裂、龙门山断裂南段、东昆仑断裂带东段存在发生M≥7.0地震的可能。

关键词：巴颜喀拉块体大地震序列块体运动均匀弹性模型强震活动

维普期刊数据库博看期刊

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混合溶剂调控插层FeSe基超导体的层间距

Science China Materials 2024年第1期67卷 295-300页

作者：胡国兵石孟竹孟凡保江风云高敏钟钒陈欢郭景锋罗习刚 Physical Science and Technology College Yichun UniversityYichun 336000China Key Laboratory of Strongly Coupled Quantum Matter Physics Chinese Academy of SciencesHefei National Laboratory for Physical Sciences at Microscaleand Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China

近年来,通过湿化学方法探索合成新型插层FeSe基超导体一直是凝聚态物理的研究热点之一.本文中,我们利用溶剂热离子交换技术成功合成出两种FeSe衍生物:c轴晶胞参数为9.93Å的Li_(0.34)Se_(0.05)(EG)_(0.14)-FeSe和c轴晶胞参数为13.85Å的Li... 详细信息

近年来,通过湿化学方法探索合成新型插层FeSe基超导体一直是凝聚态物理的研究热点之一.本文中,我们利用溶剂热离子交换技术成功合成出两种FeSe衍生物:c轴晶胞参数为9.93Å的Li_(0.34)Se_(0.05)(EG)_(0.14)-FeSe和c轴晶胞参数为13.85Å的Li_(0.21)Se_(0.05)(EG)_(0.26)FeSe.通过调整反应溶剂可以调控以上两种FeSe衍生物的层间距.磁化率和电阻率测试表明它们的超导转变温度(Tc)均为30 K左右,似乎与FeSe层层间距的大小无关.与原始FeSe单晶相比,X射线光电子能谱结果显示FeSe层Fe的价态降低,这表明Tc的提高可能是由于电子掺杂效应引起的.我们的研究为探索合成插层铁基超导体提供了有价值的参考,并为在超导领域探索新型插层材料提供了新的可能性.

关键词：超导转变温度凝聚态物理 X射线光电子能谱铁基超导体混合溶剂离子交换技术湿化学方法反应溶剂

GPS observation in Sichuan-Yunnan and its vicinity before and after the Wenchuan earthquake in a decade

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Geodesy and Geodynamics 2021年第1期12卷 43-47页

作者： Peng Jia Xi Zhang Wenquan Zhuang fengyun jiang Second Monitoring and Application Center CEAChina

Based on the horizontal velocity data observed by GPS during 2004-2007,2007-2009,and 2011-2017 before,during,and after the Wenchuan earthquake in Sichuan-Yunnan and its vicinity,we analyze evolution features of the tectonic deformation caused by crustal movement in main active fault belts,and its possible *** conclude:the Wenchuan earthquake area showed obvious co-seismic thrust and dextral deformation from 2007 to *** earthquake,to a certain extent,promoted tectonic movements on the Gansu-Sichuan boundary,Western Qinling fault zone,Anninghe-Zemuhe fault zone,and southern Xianshuihe fault *** vectors and strain filed acquired by GPS during Lushan and Jiuzhaigou earthquakes period may indicate that the southwest segment in the Longmenshan fault zone still has the possibility of larger earthquakes.

关键词： Sichuan-Yunnan and its vicinity The Wenchuan earthquake GPS Tectonic deformation Jiuzhaigou

KHCO_3 activated carbon microsphere as excellent electrocatalyst for VO^(2+)/VO_2^+ redox couple for vanadium redox flow battery

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Journal of Energy Chemistry 2019年第2期28卷 103-110页

作者： Chen Zhao Yuehua Li Zhangxing He Yingqiao jiang Lu Li fengyun jiang Huizhu Zhou Jing Zhu Wei Meng Ling Wang Lei Dai School of Chemical Engineering North China University of Science and Technology State Key Laboratory Breeding Base of Nuclear Resources and Environment East China University of Technology Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment North China University of Science and Technology

In this paper,carbon microsphere prepared by hydrothermal treatment was activated by KHCO_3 at high temperature,and employed as the catalyst for VO^(2+)/VO_2^+redox reaction for vanadium redox flow battery(VRFB).Carbon microsphere can be etched by KHCO_3 due to the reaction between the pyrolysis products of KHCO_3 and carbon ***,KHCO_3 activation can bring many oxygen functional groups on carbon microsphere,further improving the wettability of catalyst and increasing the active *** electrocatalytic properties of carbon microsphere from hydrothermal treatment are improved by high temperature carbonization,and can further be enhanced by KHCO_3 *** carbon microsphere samples,the VO^(2+)/VO_2^+redox reaction exhibits the highest electrochemical kinetics on KHCO_3 activated *** cell using KHCO_3 activated carbon microsphere as the positive catalyst demonstrates higher energy efficiency and larger discharge capacity,especially at high current *** results reveal that KHCO_3 activated carbon microsphere is an efficient,low-cost carbon-based catalyst for VO^(2+)/VO_2^+redox reaction for VRFB system.

关键词： Energy storage Vanadium redox flow battery Carbon microsphere KHCO3 Etching

Study on Postseismic Impact of Wenchuan Earthquake on the Sichuan-Yunnan Region Based on Three-Dimensional Viscoelastic Finite Element Method

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Earthquake Research in China 2019年第4期33卷 632-647页

作者： jiang fengyun ZHU Liangyu LI Yujiang The Second Monitoring and Application Center CEAXi'an 710054China The Institute of Crustal Dynamics CEABeijing 100085China

Based on the lateral segmentation and vertical stratification characteristics of the crustal medium in Sichuan-Yunnan region,and the asymmetry of the static dislocations on the coseismic fault plane of the Wenchuan M_S8.0 earthquake,we built a three-dimensional viscoelastic finite element model of the crust in the Sichuan-Yunnan *** postseismic impact of the Wenchuan M_S8.0 earthquake on the Sichuan-Yunnan region was *** results show that:①The far-field horizontal deformation caused by the viscoelastic relaxation of the medium in the 10 years after the earthquake is about 0-20 mm within the Sichuan-Yunnan diamond-shaped block,which has a greater influence on north side and smaller on south side.②In the 10 years after the earthquake,the far-field vertical deformation caused by the viscoelastic relaxation effect of the medium is small,and it shows an increase of about 0-4 mm in most areas of the Sichuan-Yunnan diamond-shaped block.③The Xianshuihe fault and the eastern segment of the East Kunlun fault,which are close to the seismogenic fault,show a high gradient on deformation fields after the earthquake.④In order to compare with the strong earthquake activity in the SichuanYunnan region after the Wenchuan earthquake,the horizontal stress state and the Coulomb failure stress change of the active block boundary are also *** the spatial distribution of the coseismic and postseismic displacement field,the fault activity characteristics reflected by the stress state and the stress loading of the fault layer reflected by the Coulomb failure stress change,there is a certain correlation with the spatial distribution of strong earthquake activity in this region.

关键词： Wenchuan M_S8.0 earthquake Finite element Viscoelastic relaxation Sichuan-Yunnan region

Effects of the February 12,2014 M_S 7.3 Yutian Earthquake on Seismicity of the Northeastern Edge of Qinghai-Tibetan Block

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Earthquake Research in China 2015年第2期29卷 158-168页

作者： Wang Shuangxu jiang fengyun Zhang Sixin Zhou Cong Second Crust Monitoring and Application Center CEA

First of all,using the GPS velocity field from campaign GPS measurements implemented by CMONC( C hina Crustal Movement Observation) a nd TEONC( C hina Tectonic Environment Observation Networks) u p to 2013, w e analyzed the background of regional crustal horizontal movement and deformation before the M S7. 3 Yutian,Xinjiang earthquake on February 12,2014. Then,by comparing this to the vertical movement from leveling measurements,we studied the crustal movement deformation and the state of strain accumulation on the northeastern edge of Qinghai-Tibetan ***,we investigated the possible effects on the earthquake activity of the northeastern edge of Tibet from the M S7. 3 Yutian earthquake. The result indicates that,the M S7. 3Yutian earthquake occurred against the background of strong tectonic movement and intensive intracontinental crustal differential movement on the edges of tectonic blocks in western China,and also that it happened in the period of the strong tectonic stress field in Qinghai-Tibetan block and its edges. The sinistral strike-slip and stress transfer of the Yutian M S7. 3 earthquake may accelerate the rupture of fault segments with high strain accumulation at the northeastern edge of Qinghai-Tibetan block( especially in Qilian Mountain fault zone,and border area of Gansu,Qinghai and Sichuan provinces on the south of western Qinling).

关键词： Seismicity The 2014 Yutian Ms7.3 earthquake Crustal movement anddeformation Stress accumulation The northeastern edge of Qinghai-Tibetan block

The NE Directed Seismicity Belt in Tibet after the M_S8.1 Nepal Earthquake and Its Predictive Significance

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Earthquake Research in China 2018年第1期32卷 119-129页

作者： Wang Shuangxu Zhu Liangyu Xu Jing Ji Lingyun jiang fengyun The Second Monitoring and Application Center China Earthquake Administration

After the 2015 M_S8. 1 Nepal earthquake,a strong and moderate seismicity belt has formed in Tibet gradually spreading along the northeast direction. In this paper,we attempt to summarize the features and investigate the primary mechanism of this behavior of seismic activity,using a 2-D finite element numerical model with tectonic dynamic settings and GPS horizontal displacements as the constraints. In addition,compared with the NEtrending seismicity belt triggered by the 1996 Xiatongmoin earthquake,we discuss the future earthquake hazard in and around Tibet. Our results show that: the NE-directed seismicity belt is the response of enhanced loading on the anisotropic Qinghai-Tibetan plateau from the Indian plate and earthquake thrusting. Also,this possibly implies that a forthcoming strong earthquake may fill in the gaps in the NE-directed seismicity belt or enhance the seismic hazard in the eastern( the north-south seismic zone) and western( Tianshan tectonic region) parts near the NE-directed belt.

关键词： The 2015 M S8.1 Nepal earthquake Qinghai-Tibetan plateau NE-directed seismicity belt predictive significance

Modeling the Dynamic Gravity Variations of Northeastern Margin of Qinghai-Xizang (Tibet) Plateau by Using Bicubic Spline Interpolation Function

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Earthquake Research in China 2005年第4期19卷 346-353页

作者： Zhu Yiqing Hu Bin Li Hui jiang fengyun Second Monitoring Center China Earthquake Administration Xi＇an 710054 China Institute of Seismology China Earthquake Administration Wuhan 430071 China

In this paper, the spatial-temporal gravity variation patterns of the northeastern margin of Qinghal-Xizang （Tibet） Plateau in 1992 - 2001 are modeled using bicubic spline interpolation functions and the relations of gravity change with seismicity and tectonic movement are discussed preliminarily. The results show as follows： ① Regional gravitational field changes regularly and the gravity abnormity zone or gravity concentration zone appears in the earthquake preparation process; ②In the significant time period, the gravity variation shows different features in the northwest, southeast and northeast parts of the surveyed region respectively, with Lanzhou as its boundary;③The gravity variation distribution is basically identical to the strike of tectonic fault zone of the region, and the contour of gravity variation is closely related to the fault distribution.

关键词： Northeastern margin of Qinghai-Xizang (Tibet) Plateau Gravity variation Bicubic spline interpolation function Tectonic deformation

考虑环流抑制的微网并联多逆变器稳定运行控制研究

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电源学报 2023年第3期21卷 41-47页

作者：江风云宜春学院物理科学与工程技术学院宜春336000

针对传统微网并联多逆变器运行控制策略仅能在某种程度上抑制系统中的环流,抑制后的环流仍然比较大的问题,提出考虑环流抑制的微网并联多逆变器稳定运行控制研究。首先,建立微网并联多逆变器模型;基于微网并联多逆变器模型,计算微网并... 详细信息

针对传统微网并联多逆变器运行控制策略仅能在某种程度上抑制系统中的环流,抑制后的环流仍然比较大的问题,提出考虑环流抑制的微网并联多逆变器稳定运行控制研究。首先,建立微网并联多逆变器模型;基于微网并联多逆变器模型,计算微网并联多逆变器输出有功功率和无功功率;根据计算出的数据,提出改进后的下垂控制方法,对系统进行控制,以减小系统的环流值,控制微网并联多逆变器稳定运行。仿真实验结果显示,在存在环流干扰条件下,当有功功率和无功负载出现变化时,采用所提方法对微网并联多逆变器进行控制,其输出功率和输出频率会随着有功功率和无功负载的变化而产生相应的变化,实现了微网并联多逆变器稳定运行,说明该方法在微网并联多逆变器稳定运行控制研究方面有一定的参考价值。

关键词：微网并联多逆变器环流下垂控制控制系数