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基于PS-InSAR的怀来台定点形变群体异常机理分析

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测绘与空间地理信息 2024年第7期47卷 38-41页

作者：高晨马广庆王晓山屈曼马栋陈建国河北省地震局河北石家庄050021

以怀来台为例,联合定点形变仪器观测结果和PS-InSAR技术监测结果,研究2017年11月至2018年3月怀来台定点形变仪器群体观测异常发生的机理。结果显示:怀来台所在区域地面沉降中心位于义合堡村的抽水井;地面沉降起始时间和定点形变仪器观... 详细信息

以怀来台为例,联合定点形变仪器观测结果和PS-InSAR技术监测结果,研究2017年11月至2018年3月怀来台定点形变仪器群体观测异常发生的机理。结果显示:怀来台所在区域地面沉降中心位于义合堡村的抽水井;地面沉降起始时间和定点形变仪器观测数据出现群体异常时间与义合堡村供热抽水井在供暖期抽取地下水的时间同步。综上认为在供暖期内义合堡村用于供热的抽水井抽水活动导致怀来台定点形变观测仪器出现群体异常。该技术可被广泛应用到定点形变仪器观测异常机理研究方面。

关键词： PS-InSAR 怀来地震台定点形变群体异常抽水

Fault plane parameters of Sanhe-Pinggu M8 earthquake in 1679 determined using present-day small earthquakes

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Earthquake Science 2014年第6期27卷 607-614页

作者： Xiaoshan Wang Xiangdong Feng Xiwei Xu Guiling Diao Yongge Wan Libin Wang guangqing ma Institute of Geophysics China Earthquake Administration Earthquake Administration of Hebei Province Institute of Geology China Earthquake Administration Institute of Disaster Prevention

The great Sanhe-Pinggu M8 earthquake occurred in 1679 was the largest surface rupture event recorded in history in the northern part of North China plain. This study determines the fault geometry of this earthquake by inverting seismological data of present-day moderate-small earthquakes in the focal area. We relocated those earthquakes with the double-difference method. Based on the assumption that clustered small earthquakes often occur in the vicinity of fault plane of large earthquake, and referring to the morphology of the long axis of the isoseismal line obtained by the predecessors, we selected a strip-shaped zone from the relocated earthquake catalog in the period from 1980 to 2009 to invert fault plane parameters of this earthquake. The inversion results are as follows： the strike is 38.23°, the dip angle is 82.54°, the slip angle is -156.08°, the fault length is about 80 km, the lower-boundary depth is about 23 km and the buried depth of upper boundary is about 3 kin. This shows that the seismogenic fault is a NNE-trending normal dip-slip fault, southeast wall downward and northwest wall uplift, with the right-lateral strike-slip component. Moreover, the surface rupture zone, intensity distribution of the earth-quake and seismic-wave velocity profile in the focal area all verified our study result.

关键词： Sanhe-Pinggu M8 earthquake Present-daymoderate-small earthquakes - Double-differenceearthquake location - Tectonic stress field Fault planeparameter

2023年3月临城M_(L)3.9地震震源机制解及构造应力场特征

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华北地震科学 2024年第3期42卷 76-82页

作者：刘檀朱音杰张幸兴郭垚嘉蒋宏毅马广庆河北红山巨厚沉积与地震灾害国家野外科学观测研究站河北邢台054000 河北省地震局石家庄050021

采用CAP方法反演了2023年3月25日河北临城M_(L)3.9地震的震源机制解和震源深度,同时收集了河北地区2001—2023年间的M_(L)≥2.0地震震源机制解,通过主应力轴分区特征及采用线性阻尼逆推方法(DRSSI)来反演区域构造应力场特征。结果显示:... 详细信息

采用CAP方法反演了2023年3月25日河北临城M_(L)3.9地震的震源机制解和震源深度,同时收集了河北地区2001—2023年间的M_(L)≥2.0地震震源机制解,通过主应力轴分区特征及采用线性阻尼逆推方法(DRSSI)来反演区域构造应力场特征。结果显示:临城地震是左旋-走滑型地震,地震矩震级为MW=3.6,发震断层为节面I,走向271.0°、倾角62.0°、滑动角−30.0°,是一条EW向隐伏断层;研究区域内的震源机制解以走滑型为主,P轴主体呈NEE-SWW向、T轴呈NWW-SEE向;P、T轴倾伏角大都在30°以内,陡倾伏角较少,主要呈近水平向,受水平构造应力的影响;研究区最大主压应力方向以NNE和NE为主;冀南地区及中部的衡水、沧州地区出现应力轴的方向偏转,可能与太行山山前断裂复杂的构造环境有关。

关键词：临城地震 CAP方法震源机制解构造应力场

Improvement of Lactiplantibacillus plantarum MWFLp-182 on oxidative deficits induced by in 2，2'-azobis(2-methylpropionamidine) dihydrochloride and the relating key gene analysis

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Food Science and Human Wellness 2024年

作者： Hui Nie Xutong ma Fanyu Kong Yanghe Luo guangqing Mu Xiaomeng Wu Dalian Probiotic Function Research Key Laboratory， Dalian Polytechnic University Guangxi Key Laboratory of Health Care Food Science and Technology， Hezhou University School of Food Science and Technology， Dalian Polytechnic University

Lactiplantibacillus plantarum MWFLp-182 was originally isolated from the feces of long-living elderly individuals in Hezhou city， Guangxi， China. L. plantarum MWFLp-182 showed favorable gastric and intestinal tolerance compared with Lactiplantibacillus rhamnosus GG (LGG). L. plantarum MWFLp-182 was further examined for its antioxidant and anti-inflammatory activity in ABAP-treated HT-29 cells. Importantly， it enhanced the expression of anti-inflammatory factor (interleukin-10 (IL-10))， antioxidant cytokines (superoxide dismutase (SOD)， glutathione peroxidase (GPx)， nuclear factor erythroid 2-related factor (Nrf2)， and hemeoxygenase 1(HO-1))， B-cell lymphoma-2 (Bcl-2)， and tight junction (Zonula occludens protein 1(ZO-1)， Claudin-1， and Occludin) proteins and genes， and reduced reactive oxygen species (ROS). The complete genome of L. plantarum MWFLp-182 contained a single circular chromosome that was 3 257 196 bp long， with a G + C content of 44.49%， and a single circular plasmid that was 53 560 bp long. The genes tpx， trxA， trxB， npr， nrdH， dps， recA， gpx， gshA and arsC in this strain were related to antioxidant function; the key genes involved in antioxidant function were further investigated. In this study， we identified a probiotic candidate with antioxidant properties.

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Doping-driven dual heterogeneous interfacial structures boosting the durability of industry-compatible water splitting at high current density

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Science China Chemistry 2024年第10期67卷 3468-3481页

作者： Chunming Yang Lihai Zhou Zhijie Kong Xiang Li Wangchuan Zhu guangqing Wang Yanzhong Zhen Feng Fu Yucang Liang Research Institute of Comprehensive Energy Industry Technology College of Chemistry & Chemical EngineeringYan'an University Henan Key Laboratory of Crystalline Molecular Functional materials Green Catalysis CenterCollege of ChemistryZhengzhou University Institut für Anorganische Chemie Eberhard Karls Universit?t

Developing highly stable electrocatalysts under industry-compatible current densities(>500 ma cm-2) in an anion-exchange membrane water electrolyzer（AEMWE） is an enormous challenge for water ***,based on the results of density function theory calculations,a dual heterogeneous interfacial structured NiSe/Fe-Ni（OH）2catalyst was subtly designed and successfully prepared by electrodepositing Fe-doped Ni（OH）2on NiSe-loaded nickel foam（NF）.Fe doping-driven heterogeneous structures in NiSe/Fe-Ni（OH）2markedly boost catalytic activity and durability at industrially compatible current densities in single hydrogen and oxygen evolution reactions under alkaline *** particular,NiSe/Fe-Ni（OH）2shows a negligible performance loss at 600 ma cm-2at least 1,000 h for overall water splitting,a distinguished long-term durability acting as AEMWE electrodes at 600 ma cm-2and 1 A cm-2at 85℃ for at least 95 *** to Fe doping-induced strong synergetic effect between Ni and Fe,dual heterostructure-promoted charge transfer and redistribution,abundant catalytic active sites,and improvement of stability and durability,a mechanism of Fe doping-driven heterogeneous interfacial structurepromoted catalytic performance was *** study provides a successful example of theory-directed catalyst preparation and pioneers a creative strategy for industry-compatible water splitting at high current density.

关键词： doping-induced heterojunction structure NiSe/Fe-Ni(OH)2 large current density anion-exchange membrane industry-compatible water electrolysis

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河北红山台宽频带地震记录区域叠加研究

震灾防御技术 2023年第2期18卷 380-388页

作者：纪春玲张合董博马广庆河北红山巨厚沉积与地震灾害国家野外科学观测研究站河北邢台054000 河北省地震局石家庄050021

可靠的震相走时是地震预警技术中精确测定震源位置和发震时刻的基础,本文运用STA/LTA震相识别技术,针对单台(河北红山台)2009−2021年共计12年积累的地震记录进行叠加计算,得到了红山台记录到的区域地震各震相走时曲线。结果显示,震中距0... 详细信息

可靠的震相走时是地震预警技术中精确测定震源位置和发震时刻的基础,本文运用STA/LTA震相识别技术,针对单台(河北红山台)2009−2021年共计12年积累的地震记录进行叠加计算,得到了红山台记录到的区域地震各震相走时曲线。结果显示,震中距0°~50°范围内红山台共成像7种震相的走时曲线,分别为P、S、PP、SS、PcS、ScS以及R面波震相,且随着组合参数变化,叠加成像的震相种类、震中距范围、清晰度均有所不同。此外,通过绘制各震相走时曲线发现,震中距0°~15°范围内,P波、S波及R波走时曲线基本呈线性变化,震中距0°~15°范围内计算得到红山台区域地震P波传播速度为7.5 km/s左右,S波传播速度为4.2 km/s左右,R波传播速度为3.5 km/s左右,介于P波和S波之间存在一个震相的走时痕迹,波速为5.4 km/s左右。本工作对于提升红山台震中距≤1000 km的地震预警定位精度有指导意义。

关键词：震相叠加 STA/LTA 地震记录