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Earthquake Science 2009年第3期22卷 263-269页

作者： Yaqiong Dai Jinwei Ren Xuhui Shen Jingfa Zhang shunying hong Institute of Earthquake Science China Earthquake Administration Beijing 100036 China Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China

Digital elevation model （DEM） can be generated by interferometric synthetic aperture radar （InSAR）. In this paper, the interferometric processing and analyses are carried out for Damxung-Yangbajain area in Tibet, using a pair of Europe remote-sensing satellite （ERS）-1/2 tandem SAR images acquired on 6 and 7 April 1996. A portion of the In- SAR-derived DEM is selected and compared with the 1：50 000 DEM to determine the precision of the InSAR-derived DEM. The comparison indicates that the root mean squared errors （RMSE）, which are used to evaluate error, are about 35, 60, 10, and 15 m in the studied area, mountainous area, basin area and near-fault area, respectively, suggesting that obvious errors are mainly in mountainous area. Besides, the limitation of InSAR technology to generate DEM is analyzed. Our investigation shows that InSAR is an effective tool in geodesy and an important complement to field surveying in some dangerous areas.

关键词： InSAR DEM geomorphological analysis Damxung-Yangbajain root mean squared error

Progress and development on multi-parameters remote sensing application in earthquake monitoring in China

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Earthquake Science 2013年第6期26卷 427-437页

作者： Xuhui Shen Xuemin Zhang shunying hong Feng Jing Shufan Zhao Institute of Earthquake Science China Earthquake Administration

In this paper, the progress and development on remote sensing technology applied in earthquake monitoring research are summarized, such as differential interference synthetic aperture radar （D-InSAR）, infrared remote sensing, and seismo-ionospheric detecting. Many new monitoring data in this domain have been used, and new data processing methods have been developed to obtain high-precision images about crustal deformation, outgoing longwave radiation （OLR）, surface latent heat flux （SLHF）, and ionospheric parameters. The development in monitoring technology and data processing technique largely enriches earthquake research information and provides new tools for earthquake stereoscope monitoring system, especially on the space part. Finally, new developing trend in this area was introduced, and some key problems in future work were pointed out.

关键词： Remote sensing monitoring D-InSAR Infrared remote sensing Seismo-ionospheric detecting

Coseismic deformation of the 2021 M_(W)7.4 Maduo earthquake from joint inversion of InSAR, GPS, and teleseismic data

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Earthquake Science 2021年第5期34卷 436-446页

作者： Chaoya Liu Ling Bai shunying hong Yanfang Dong Yong Jiang hongru Li Huili Zhan Zhiwen Chen Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China

The M_(W)7.4 Maduo earthquake occurred on 22 May 2021 at 02:04 CST with a large-expansion surface *** earthquake was located in the Bayan Har block at the eastern Tibetan Plateau,where eight earthquakes of M_(S)>7.0 have occurred in the past 25 ***,we combined interferometric synthetic aperture radar,GPS,and teleseismic data to study the coseismic slip distribution,fault geometry,and dynamic source rupture process of the Maduo *** found that the overall coseismic deformation field of the Maduo earthquake is distributed in the NWW-SEE direction along 285°.There was slight bending at the western end and two branches at the eastern *** maximum slip is located near the eastern bending area on the northern branch of the fault *** rupture nucleated on the Jiangcuo fault and propagated approximately 160 km along-strike in both the NWW and SEE *** characteristic source rupture process of the Maduo earthquake is similar to that of the 2010 M_(W)6.8 Yushu earthquake,indicating that similar earthquakes with large-expansion surface ruptures and small shallow slip deficits can occur on both the internal fault and boundary fault of the Bayan Har block.

关键词： Maduo earthquake joint inversion coseismic de-formation fault geometry rupture process.

Paleoearthquake Studies along the Nalinlaka Fault of the Late Pleistocene in Lhasa,Tibet

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Earthquake Research in China 2010年第4期24卷 467-477页

作者： Liu Jing Guan Peng Shen Xuhui Xu Yueren Shen Junfeng Jing Feng hong shunying Institute of Earthquake Science China Earthquake Administratin Beijing 100036 China Hebei Dadi Building Construction Engineering Co. Ltd. Beijing 100027 China China University of Geosciences Beijing 100083 China

As the most import fault of the Late Pleistocene in the Lhasa area,the Nalinlaka fault is a left-lateral thrust fault,striking NWW,dipping SSW with a high dip angle,and extending over *** to studies on the latest strata on the Nalinlaka fault zone,this fault zone has been obviously active since the Late Pleistocene and the movement left behind some geomorphologic phenomena on the earth's surface,especially at the sites of the gully west of Cijiaolin and around Xiecun *** example,some rivers,ridges and terraces are displaced,forming beheaded gullies and fault *** horizontal displacements since the Late Pleistocene at the above two places are 54m ～ 87m,20m ～ 67m,*** on studies on the 4 trenches along the fault using the progressive constraining method,we conclude that there might have been 5 paleoearthquake events along the Nalinlaka fault since 70ka B.P.,the ages of each paleoearthquake are 68.53,54.40,< 41.23,21.96,9.86ka B.P.,and the average recurrence interval is *** of the limits of trenches and earthquake events exposed by each trench,no single trench completely revealed all 5 *** may therefore be some errors in determining the upper and lower limits of some events in this article.

关键词： Lhasa Active fault Paleoearthquake

Human lineage mutations regulate RNA-protein binding of conserved genes NTRK2 and ITPR1 involved in human evolution

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General Psychiatry 2024年第3期37卷 375-387页

作者： Wenxiang Cai Weichen Song shunying Yu Min Zhao Guan Ning Lin Shanghai Mental Health Center Shanghai Jiao Tong University School of MedicineSchool of Biomedical EngineeringShanghai Jiao Tong UniversityShanghaiChina Shanghai Key Laboratory of Psychotic Disorders ShanghaiChina

Background The role of human lineage mutations(HLMs)in human evolution through post-transcriptional modification is *** To investigate the contribution of HLMs to human evolution through post-transcriptional *** We applied a deep learning model Seqweaver to predict how HLMs impact RNA-binding protein *** We found that only 0.27%of HLMs had significant impacts on RNA-binding proteins at the threshold of the top 1%of human common *** HLMs enriched in a set of conserved genes highly expressed in adult excitatory neurons and prenatal Purkinje neurons,and were involved in synapse organisation and the GTPase *** genes also carried excess damaging coding mutations that caused neurodevelopmental disorders,ataxia and *** these genes,NTRK2 and ITPR1 had the most aggregated evidence of functional importance,suggesting their essential roles in cognition and *** Our findings suggest that a small subset of human-specific mutations have contributed to human speciation through impacts on post-transcriptional modification of critical brain-related genes.

关键词： evolution conserved Human

Association of DNA methylation/demethylation with the functional outcome of stroke in a hyperinflammatory state

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Neural Regeneration Research 2024年第10期19卷 2229-2239页

作者： Yubo Wang Ling Zhang Tianjie Lyu Lu Cui shunying Zhao Xuechun Wang Meng Wang Yongjun Wang Zixiao Li Vascular Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina National Center for Healthcare Quality Management in Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Chinese Institute for Brain Research BeijingChina Research Unit of Artificial Intelligence in Cerebrovascular Disease Chinese Academy of Medical SciencesBeijingChina Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases BeijingChina

Inflammation is closely related to stroke prognosis, and high inflammation status leads to poor functional outcome in stroke. DNA methylation is involved in the pathogenesis and prognosis of stroke. However, the effect of DNA methylation on stroke at high levels of inflammation is unclear. In this study, we constructed a hyperinflammatory cerebral ischemia mouse model and investigated the effect of hypomethylation and hypermethylation on the functional outcome. We constructed a mouse model of transient middle cerebral artery occlusion and treated the mice with lipopolysaccharide to induce a hyperinflammatory state. To investigate the effect of DNA methylation on stroke, we used small molecule inhibitors to restrain the function of key DNA methylation and demethylation enzymes. 2,3,5-Triphenyltetrazolium chloride staining, neurological function scores, neurobehavioral tests, enzyme-linked immunosorbent assay, quantitative reverse transcription PCR and western blot assay were used to evaluate the effects after stroke in mice. We assessed changes in the global methylation status by measuring DNA 5-mc and DNA 5-hmc levels in peripheral blood after the use of the inhibitor. In the group treated with the DNA methylation inhibitor, brain tissue 2,3,5-triphenyltetrazolium chloride staining showed an increase in infarct volume, which was accompanied by a decrease in neurological scores and worsening of neurobehavioral performance. The levels of inflammatory factors interleukin 6 and interleukin-1 beta in ischemic brain tissue and plasma were elevated, indicating increased inflammation. Related inflammatory pathway exploration showed significant overactivation of nuclear factor kappa B. These results suggested that inhibiting DNA methylation led to poor functional outcome in mice with high inflammation following stroke. Further, the effects were reversed by inhibition of DNA demethylation. Our findings suggest that DNA methylation regulates the inflammatory response in stroke

关键词： DNA demethylation DNA methylation DNMT3A functional outcome hyperinflammatory state interleukin neuroinflammation stroke TET2

2008年10月西藏当雄M_W6.3地震震后形变提取与余滑反演

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地球物理学报 2018年第12期61卷 4827-4837页

作者：洪顺英董彦芳孟国杰张奎陈立泽中国地震局地震预测研究所北京100036 重庆大学重庆400044

2008年10月6日西藏当雄发生M_W6.3地震.本文利用震后2008年10月26日至2010年8月22日的16期ENVISAT ASAR数据,通过小基线集干涉测量、误差校正与MInTS(Multiscale InSAR Time Series)技术提取高精度的震后形变场,利用SDM(Steepest Descent Method)方法反演断层震后余滑演化过程,并分析震后余滑与同震滑动的关系.结果表明:当雄M_W6.3地震的近场震后形变场主要位于断层西侧,在时间演化上具有明显的对数函数衰减规律;震后余滑主要集中于断层中南段深0～15km区间,最大的余滑量约0.07m,位于断层深约9.28km处,滑动角约-103°;震后余滑引起的地震矩能量M_0与矩震级MW在时间演化上具有指数函数递增规律;当剪切模量μ=32GPa,震后665天余滑释放的地震矩能量约为1.92×10^(17) N·m,约占同震滑动释放地震矩的4.8%,相当于矩震级M_W5.46;虽然震后余滑已经延伸到断层浅部0～5km区间,但由于余滑量相对较小,没有改变同震滑动在断层浅部区域的滑动亏损现象,这可能是2010年11月30日该区域又发生M_W5.3级余震的主要原因之一.

关键词：当雄地震余滑 InSAR MInTS SDM

2021年青海玛多7.4级地震的同震变形分析

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地球物理学报 2021年第8期64卷 2671-2683页

作者：杨君妍孙文科洪顺英苑争一李瑜陈伟孟国杰中国地震局地震预测研究所北京100039 中国地震台网中心北京100045 中国科学院大学地球与行星科学学院北京100049

2021年5月22日,青海省玛多县发生了7.4级地震,该地震发生在巴颜喀拉地块北部边界东昆仑断裂带以南约70 km,属于块体内部断裂带地震.根据中国大陆构造环境监测网络提供资料,距离震源30多公里的玛多台站记录到东西向永久位移约25 cm.同时,... 详细信息

2021年5月22日,青海省玛多县发生了7.4级地震,该地震发生在巴颜喀拉地块北部边界东昆仑断裂带以南约70 km,属于块体内部断裂带地震.根据中国大陆构造环境监测网络提供资料,距离震源30多公里的玛多台站记录到东西向永久位移约25 cm.同时,InSAR也观测到明显的形变场,升轨和降轨的最大相对形变量分别约1.87 m和2.32 m.为了解释这些大地测量观测数据,本文利用该地震的三个断层滑动模型,基于不同地球模型的地震位错理论,计算同震变形场,并分别与GNSS观测数据和InSAR视线向形变量对比分析,结果显示基于InSAR数据反演的断层滑动模型产生的位移场与球形地球模型的理论计算结果最为吻合.进一步,利用较优断层模型计算2021年青海玛多7.4级地震的理论同震位移、大地水准面、重力和应变等变化,该结果为玛多地震的GNSS和重力观测的解释提供理论参考依据.

关键词：玛多地震断层滑动模型同震变形位错理论地球模型

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嘉黎—崩错断裂现今变形特征分析

地球物理学进展 2022年第1期37卷 30-40页

作者：黄星洪顺英金红林孙凯金阳中国地震局地震预测研究所北京100036 中国地震局地质研究所北京100029

嘉黎—崩错断裂地处青藏高原东向挤出的边界区域,其活动特性能直接反映区域地质构造的动力学成因,并能为青藏高原的演化提供一定的理论解释.本研究中利用InSAR与GPS观测数据对嘉黎—崩错断裂进行研究分析,结果表明:崩错断裂跨断裂活动... 详细信息

嘉黎—崩错断裂地处青藏高原东向挤出的边界区域,其活动特性能直接反映区域地质构造的动力学成因,并能为青藏高原的演化提供一定的理论解释.本研究中利用InSAR与GPS观测数据对嘉黎—崩错断裂进行研究分析,结果表明:崩错断裂跨断裂活动速率为0.9-1.9 mm/a;嘉黎断裂西段跨断裂活动速率为1.7-2.6 mm/a;崩错断裂闭锁深度下的自由滑动速率约为1.3-2.9 mm/a,闭锁深度约为8.3-11.1 km;嘉黎断裂西段闭锁深度下的自由滑动速率约为1.7-2.7 mm/a,闭锁深度为2.2-3.0 km.崩错断裂附近曾有7级以上强震记录,根据断层现今运动状态推测其处于震间闭锁和应变积累状态.嘉黎断裂西段处于低剪切应变率状态,目前可能处于完全闭锁状态.

关键词：嘉黎—崩错断裂 InSAR 闭锁深度滑动速率

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我国高分辨率遥感技术在地震研究中的应用

地震学报 2016年第3期38卷 333-344,508页

作者：陈立泽申旭辉王辉洪顺英荆凤中国地震局地震预测研究所中国北京100036 中国地震局地壳应力研究所中国北京100085

本文概述了我国高分辨率遥感技术在地震监测预报、灾害预防和应急救援防震减灾三大业务体系中的应用现状,重点介绍了"高分遥感地震监测与应急应用示范"项目的进展.该项目针对防震减灾业务体系发展的应用需求,在整合地震行业现有技术和... 详细信息

本文概述了我国高分辨率遥感技术在地震监测预报、灾害预防和应急救援防震减灾三大业务体系中的应用现状,重点介绍了"高分遥感地震监测与应急应用示范"项目的进展.该项目针对防震减灾业务体系发展的应用需求,在整合地震行业现有技术和资源的基础上,突破了高分辨率对地观测系统卫星遥感数据在地震构造调查、地震监测和地震应急救援等方面应用的关键技术,制定行业应用规范,建设高分遥感地震业务应用示范系统,并开展应用示范.该项目的成功实施,使得我国高分辨率遥感技术在地震中的应用从以往分散的科学研究提升到一个业务化应用的状态,从而能更加有效地服务于防震减灾工作.

关键词：高分辨率遥感地震构造调查地震监测地震应急救援