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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2464-2465页

作者： CHANG Zufeng zang yang and CHANG Hao Yunnan Earthquake Agency Kunming650224China

Objective The lateral extrusion eastward of the Tibetan Plateau leads to the formation of the Sichuan–Yunnan block, which is the most representative active block in the southeastern margin of the Tibetan Plateau, characterized by strong and frequent seismicity(Li Ping et al., 1975; Zhang Peizhen et al., 2003; Li Yong et al., 2017). Its eastern boundary is composed of sinistral faults including the Xianshuihe, Xiaojiang faults, etc., and the western

关键词： New Discovery of Holocene Activity along the Weixi-Qiaohou Fault in Southeastern Margin of the Tibetan Plateau and its Neotectonic Significance

Determination of the local magnitudes of small earthquakes using a dense seismic array in the Changning-Zhaotong Shale Gas Field,Southern Sichuan Basin

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Earth and Planetary Physics 2021年第6期5卷 532-546页

作者： Wen yang GuoYi Chen LingYuan Meng yang zang HaiJiang Zhang JunLun Li Laboratory of Seismology and Physics of the Earth’s Interior School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China National Geophysical Observatory at Mengcheng University of Science and Technology of ChinaMengcheng Anhui 233500China China Earthquake Networks Center Beijing 100045China

With the development of unconventional shale gas in the southern Sichuan Basin,seismicity in the region has increased significantly in recent *** the existing sparse regional seismic stations can capture most earthquakes with ML≥2.5,a great number of smaller earthquakes are often omitted due to limited detection *** the advent of portable seismic nodes,many dense arrays for monitoring seismicity in the unconventional oil and gas fields have been deployed,and the magnitudes of those earthquakes are key to understand the local fault reactivation and seismic ***,the current national standard for determining the local magnitudes was not specifically designed for monitoring stations in close proximity,utilizing a calibration function with a minimal resolution of 5 km in the epicentral *** is,the current national standard tends to overestimate the local magnitudes for stations within short epicentral distances,and can result in discrepancies for dense *** this study,we propose a new local magnitude formula which corrects the overestimated magnitudes for shorter distances,yielding accurate event magnitudes for small earthquakes in the Changning-Zhaotong shale gas field in the southern Sichuan Basin,monitored by dense seismic arrays in close *** formula is used to determine the local magnitudes of 7,500 events monitored by a two-phased dense array with several hundred 5 Hz 3 C nodes deployed from the end of February 2019 to early May 2019 in the Changning-Zhaotong shale gas *** magnitude of completeness(MC)using the dense array is-0.1,compared to MC 1.1 by the sparser Chinese Seismic Network(CSN).In addition,using a machine learning detection and picking procedure,we successfully identify and process some 14,000 earthquakes from the continuous waveforms,a ten-fold increase over the catalog recorded by CSN for the same period,and the MC is further reduced to-0.3 from-0.1 compared to the catalog obtained via ma

关键词： shale gas development local magnitude microearthquakes dense seismic array machine learning

2024年新疆乌什7.1级地震和中国台湾花莲7.3级地震前的大震长期平静及中国内地强震危险性研究

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地震研究 2025年第1期48卷 32-40页

作者：赵小艳苏有锦孟令媛臧阳云南省地震局云南昆明650224 中国地震台网中心北京100045

对2024年新疆乌什7.1级地震和中国台湾花莲7.3级地震前出现的长期地震平静现象及其平静结束后的地震趋势进行了分析,进而对中国内地当前仍存在的2个大震长期地震平静区域及其危险性进行了分析和讨论。结果表明:①乌什7.1级地震结束了天... 详细信息

对2024年新疆乌什7.1级地震和中国台湾花莲7.3级地震前出现的长期地震平静现象及其平静结束后的地震趋势进行了分析,进而对中国内地当前仍存在的2个大震长期地震平静区域及其危险性进行了分析和讨论。结果表明:①乌什7.1级地震结束了天山地震带长达31年的7级以上地震长期平静状态,可能预示着天山地震带将进入一个新的7级以上地震活跃时段;花莲7.3级地震结束了中国台湾地区长达17年的7级以上地震长期平静状态,可能预示着中国台湾地区将进入一个新的7级以上地震活跃时段。②南北地震带南段的云南地区自1996年丽江7.0级地震以来地震平静时间超过28年,南北地震带北段的甘肃-宁夏地区自1954年内蒙古阿拉善盟阿拉善左旗7.0级地震以来地震平静时间已超过70年,这2个区域当前或未来一个时期发生7级以上地震的风险较高,尤其是云南地震地区,应引起特别的关注和研究。

关键词：乌什7.1级地震花莲7.3级地震地震长期平静南北地震带

Earthquake Probability of the“Seismic Gap”on the Longmenshan Fault

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Earthquake Research in China 2018年第1期32卷 15-27页

作者： Song Jin Jiang Haikun Meng Lingyuan zang yang China Earthquake Networks Center Beijing 100045China Institute of Geophysics China Earthquake AdministrationBeijing 100081China

Using the layered viscoelastic medium model,this paper calculated the coulomb stress loading effect on the Lushan epicenter generated by the Wenchuan *** combined with the rate-state friction law proposed by Dieterich J.(1994),we obtain the probability of an0 earthquake occurring in the vicinity of *** results show that the probability of0 earthquake of the Lushan region in 2013 is up to18%,indicating that the stress disturbance caused by the Wenchuan earthquake accelerated the Lushan *** paper also calculates the coulomb stress accumulation on the"seismic gap"generated by the two earthquakes of Wenchuan and Lushan,and combined with the background seismicity,gives the6.0 earthquake probability of the"seismic gap".Although there may be a certain error in the results because of the Dayi earthquake,selection of the medium model parameters and background seismicity,the seismic probability of the"seismic gap"is ***,we think destructive earthquakes are still likely to occur in the"seismic gap".

关键词： The coulomb stress The rate-state friction law Earthquake probability

A summary of seismic activities in and around China in 2021

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Earthquake Research Advances 2022年第3期2卷 77-87页

作者： Yanyan Han yang zang Lingyuan Meng Yue Wang Shiguang Deng Yawei Ma Mengyu Xie China Earthquake Networks Center Beijing100045China

In this article,we review the general characteristics of seismicity in and around China and the overall statistics of earthquake damage in 2021,focusing on several significant events and related scientific *** them,the largest event is the M_(S)7.4 Madoi earthquake in Qinghai Province,northwest *** event marks another M_(S)≥7 earthquake occurring near the boundary of the Bayan Har Block that has ended a remarkable quiescence of the M_(S)≥7 earthquakes within the Chinese *** addition,the M_(S)6.4 yangbi earthquake in Yunnan Province,southwest China draws the most attention because of its abundant foreshocks,which are well recorded by the densely distributed seismic stations in the surrounding *** this event,we review several recent publications focusing on the Gutenberg-Richter b-value change and the physical mechanism of foreshocks associated with this *** M_(S)6.0 Luxian earthquake in Sichuan Province,southwest China has caused serious damage with a relatively low magnitude,partly because the focal depth of the mainshock is relatively shallow (3.5 km).It is another strong earthquake occurring within the southeast Sichuan basin with low historical seismicity yet has increased significantly since 2015,probably due to shale gas development and associated hydraulic fracturing.

关键词： Seismicity in China Madoi earthquake yangbi earthquake Luxian earthquake

Rapid report of the 8 January 2022 M_(S)6.9 Menyuan earthquake,Qinghai,China

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Earthquake Research Advances 2022年第1期2卷 4-14页

作者： Hongfeng yang Dun Wang Rumeng Guo Mengyu Xie yang zang Yue Wang Qiang Yao Chuang Cheng Yanru An Yingying Zhang Earth System Science Programme Faculty of ScienceThe Chinese University of Hong KongShatinNTHong KongChina China University of Geosciences Wuhan WuhanHubeiChina State Key Laboratory of Geodesy and Earth's Dynamic Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhanChina China Earthquake Networks Center China Earthquake AdministrationBeijingChina

The M_(S)6.9 Menyuan earthquake in Qinghai Province,west China is the largest earthquake by far in *** earthquake occurs in a tectonically active region,with a background b-value of 0.87 within 100 km of the epicenter that we derived from the unified catalog produced by China Earthquake Networks Center since late *** surveys have revealed surface ruptures extending 22 km along strike,with a maximum ground displacement of 2.1 *** construct a finite fault model with constraints from In SAR observations,which showed multiple fault segments during the Menyuan *** major slip asperity is confined within 10 km at depth,with the maximum slip of 3.5 *** real-time back-projection results of coseismic radiation indicate a northwest propagating rupture that lasted for~10 *** estimates from the back-projection results show up to a Mercalli scale of IX near the ruptured area,consistent with instrumental measurements and the observations from the field *** locations(up to January 21,2022)exhibit two segments,extending to~20 km in *** largest one reaches M_(S)5.3,locating near the eastern end of the aftershock *** the location and the approximate magnitude of the mainshock had been indicated by previous studies based on paleoearthquake records and seismic gap,as well as estimated stressing rate on faults,significant surfacebreaching rupture leads to severe damage of the high-speed railway system,which poses a challenge in accurately assessing earthquake hazards and risks,and thus demands further investigations of the rupture behaviors for crustal earthquakes.

关键词： Surface rupture Coseismic slip Real-time Intensity Aftershock location and statistics Earthquake magnitude forecasting

Fluorescence Emission Mediated by Metal-Dielectric-Metal Fishnet Metasurface: Spatially Selective Excitation and Double Enhancement

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Chinese Journal of Chemical Physics 2019年第3期32卷 349-356,I0002页

作者： Yuan Ren Yong-hua Lu Tian-yang zang Pei Wang Department of Optics and Optical Engineering Anhui Key Laboratory of Optoelectronic Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China

Enhancement of uorescent radiation is of great importance for applications including biological imaging,high-sensitivity detectors,and integrated light *** electromagnetic elds can be created around metallic nanoparticles or in gap of nanostructures,where the local state density of radiating mode is then dramatically *** enhanced uorescent emission has been demonstrated in many metallic nanoparticles and nanoparticle pairs,simultaneous mediation of absorption and emission processes of uorescent emitters remains challenging in metallic ***,we investigate uorescent emission mediated by metal-dielectric-metal fishnet metasurface,in which localized surface plasmon(LSP)and magnetic plasmon polaritons(MPPs)modes are coupled with absorption and emission processes,*** absorption process,coupling of the LSP mode enables spatially-selective excitation of the uorescent emitters by rotating the polarization of the pump laser *** addition,the polarization-dependent MPP mode enables manipulation of both polarization and wavelength of the uorescent emission by introducing a rectangular fishnet *** the experimental observations are further corroborated by nite-difference time-domain *** structure reported here has great potential for application to color light-emitting devices and nanoscale integrated light sources.

关键词： Surface plasmons Fluorescence emission enhancement Spectroscopy modulation Metasurface

A Review of Seismicity in 2016

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Earthquake Research in China 2017年第1期31卷 139-150页

作者： Li Zhichao Song Jin Jiang Xianghua zang yang yang Wen Yao Qi Shi Haixia Han Yanyan Meng Lingyuan Zhou Longquan China Earthquake Networks Centre Beijing 100045 China

1 SURVEY OF GLOBAL SEISMICITY A total of 17 strong earthquakes with MS≥7.0 occurred in 2016(by the end of December31,2016)throughout the world,according to the China Seismic *** them,one earthquake with M_S8.0 occurred on November 13,2016 in New Zealand(Fig.1).The 2016New Zealand M_S8.0 earthquake(M_W7.8 measured by USGS)was the strongest

关键词： of with is in MS A Review of Seismicity in 2016

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微处理器静电电磁脉冲辐照效应试验研究

高电压技术 2006年第10期32卷 53-55页

作者：臧扬路潇中国人民解放军73906部队52分队军械工程学院训练部

为研究静电电磁脉冲(ESD EMP)对嵌入式微处理器(MPU)的影响,根据IEC61000-4-2标准,利用静电电磁脉冲电场测试系统对FPGA、CPLD、80C196单片机3种电路进行ESD EMP辐照效应试验,同时实测了耦合板周围电场强度,根据试验结果分析了故障原因... 详细信息

为研究静电电磁脉冲(ESD EMP)对嵌入式微处理器(MPU)的影响,根据IEC61000-4-2标准,利用静电电磁脉冲电场测试系统对FPGA、CPLD、80C196单片机3种电路进行ESD EMP辐照效应试验,同时实测了耦合板周围电场强度,根据试验结果分析了故障原因。试验发现ESD EMP对MPU系统工作稳定性影响较大,使FPGA、CPLD、80C196单片机集成电路发生死机或重启故障的静电放电电压阈值分别为13、7和10kV;3种微处理器对ESD EMP的敏感度序列为:CPLD>80C196单片机>FPGA。ESD EMP对MPU电路危害表现在放电的近场区,容易造成电子器件的击穿,而在远场区,主要是对电子设备造成高频干扰。

关键词：静电放电电磁脉冲辐照效应微处理器敏感度

深过冷三元Ni-Cu-Co合金的快速枝晶生长

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物理学报 2007年第8期56卷 4804-4809页

作者：臧渡洋王海鹏魏炳波西北工业大学应用物理系西安710072

研究了深过冷条件下三元Ni80Cu10Co10合金的快速枝晶生长,采用电磁悬浮无容器处理方法获得了335K(0.2TL)的最大过冷度.X射线衍射分析与差示扫描量热分析均表明,凝固组织为α-Ni单相固溶体.随过冷度增大,凝固组织显著细化,并且当过冷度达... 详细信息

研究了深过冷条件下三元Ni80Cu10Co10合金的快速枝晶生长,采用电磁悬浮无容器处理方法获得了335K(0.2TL)的最大过冷度.X射线衍射分析与差示扫描量热分析均表明,凝固组织为α-Ni单相固溶体.随过冷度增大,凝固组织显著细化,并且当过冷度达110K时,凝固组织的形态由粗大形枝晶转变为等轴晶.深过冷条件下溶质截留效应增强,使得微观偏析程度减小.对不同过冷度下合金枝晶的生长速度进行了实验测定,当过冷度超过284K后,生长速度呈现下降趋势.在大过冷度时,Cu和Co溶质元素的引入,显著降低了Ni80Cu10Co10合金的枝晶生长速度.

关键词：深过冷枝晶生长快速凝固溶质截留