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Kinematic deformation and intensity assessment of the 2021 Maduo M_(S)7.4 earthquake in Qinghai revealed by high-frequency GNSS

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Geodesy and Geodynamics 2024年第3期15卷 230-240页

作者： Yu Li yuebing wang Lijiang Zhao Hongbo Shi Pingping wang Institute of Geophysics China Earthquake AdministrationBeijing 100081China China Earthquake Networks Center China Earthquake AdministrationBeijing 100045China Qinghai Institute of Geological Surveying and Mapping Geographic Information Qinghai 810001China Beijing Sixents Technology Co. Ltd.Beijing 100094China

Rapid acquisition of the kinematic deformation field and seismic intensity distribution of large earthquakes is crucial for postseismic emergency rescue,disaster assessment,and future seismic risk *** advancement of GNSS observation and data processing makes it play an important role in this field,especially the high-frequency *** used the differential positioning method to calculate the 1 HZ GNSS data from 98 sites within 1000 km of the M_(S)7.4 Maduo earthquake *** kinematic deformation field and the distribution of the seismic intensity by using the peak ground velocity derived from displacement waveforms were *** results show that:1)Horizontal coseismic response deformation levels ranging from 25 mm to 301 mm can be observed within a 1000 km radius from the *** response deformation on the east and west sides shows bilateral asymmetry,which markedly differs from the symmetry presented by surface rupture.2)The seismic intensity obtained through high-frequency GNSS and field investigations exhibits good consistency of the scope and orientation in the high seismic intensity area,although the former is generally slightly smaller than the latter.3)There may exist obstacles on the eastern side of the seismogenic *** Maduo earthquake induced a certain tectonic stress loading effect on the western Kunlun Pass-Jiangcuo fault(KPJF)and Maqin-Maqu segment,resulting in higher seismic risk in the future.

关键词： Maduo earthquake High-frequency GNSS Kinematic deformation Seismic intensity

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Probing the interseismic locking state of the Xianshuihe fault based on a viscoelastic deformation model

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Science China Earth Sciences 2024年第1期67卷 134-145页

作者： Yage ZHU Faqi DIAO Fei CHEN yuebing wang Zhigang SHAO Rongjiang wang Xiong XIONG Hubei Subsurface Multi-Scale Imaging Key Laboratory School of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China China Earthquake Networks Center Beijing 100045China Institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China

The interseismic locking state of tectonic faults is essential for regional seismic hazard ***,it is challenging to obtain this parameter reliably due to the weak deformation and complex model *** better probe the fault locking state,more reliable physical models and well-covered observations are *** we investigate the locking state of the Xianshuihe fault based on a new-developed viscoelastic deformation ***,we combine GPS velocities from 13 new near-field stations and existing stations in this region to improve the spatial *** to the theoretical predictions,our results indicate that the elastic model will clearly overestimate the fault locking depth and seismic moment accumulation rate,and the fault slip rate inferred from the elastic model is slightly lower than that from the viscoelastic *** on the locking distribution inferred from the viscoelastic model,we identify four potential asperities on the Xianshuihe *** importantly,we find a clear spatial correlation between the fault locking distribution and the rupture extent of historical earthquakes,which indicates that the fault locking state may control the rupture extent and thus the magnitude of *** addition,our results show that the 2022 M6.8 Luding earthquake only ruptured the south part of a potential asperity,and the accumulated energy in the northern unruptured area is equivalent to an Mw6.9 earthquake,where the seismic hazard deserves special attention.

关键词： Fault kinematics Viscoelastic relaxation effect GPS observations Seismic hazard The 2022 M6.8 Luding earthquake

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Ubi1 intron-mediated enhancement of the expression of Bt cry1Ah gene in transgenic maize (Zea mays L.)

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Chinese Science Bulletin 2008年第20期53卷 3185-3190页

作者： wang yuebing LANG Zhihong ZHANG Jie HE KangLai SONG FuPing HUANG DaFang Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing 100081 China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100193 China

The cry1Ah gene was one of novel insecticidal genes cloned from Bacillus thuringiensis isolate BT8. Two plant expression vectors containing cry1Ah gene were constructed. The first intron of maize ubiqutin1 gene was inserted between the maize Ubiquitin promoter and cry1Ah gene in one of the plant expressing vectors (pUUOAH). The two vectors were introduced into maize immature embryonic calli by microprojectile bombardment, and the reproductively plants were acquired. PCR and Southern blot analysis showed that foreign genes had been integrated into maize genome and inherited to the next generation stably. The ELISA assay to T1 and T2 generation plants showed that the expression of Cry1Ah protein in the construct containing the ubi1 intron (pUUOAH) was 20% higher than that of the intronless construct (pUOAH). Bioassay results showed that the transgenic maize harboring cry1Ah gene had high resistance to the Asian corn borers and the insecticidal activity of the transgenic maize containing the ubi1 intron was higher than that of the intronless construct. These results indicated that the maize ubi1 intron can enhance the expression of the Bt cry1Ah gene in transgenic maize

关键词：苏云金芽孢杆菌 cry1Ah基因转基因玉米 Ubi1基因区基因表达

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Differential Responses of Transplanted Stem Cells to Diseased Environment Unveiled by a Molecular NIR-II Cell Tracker

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Research 2021年第1期2021卷 935-950页

作者： Hao Chen Huaxiao Yang Chen Zhang Si Chen Xin Zhao Mark Zhu Zhiming wang yuebing wang Hung-Ta Wo Kai Li Zhen Cheng Center for Molecular Imaging Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Molecular Imaging Program at Stanford(MIPS) Bio-X Programand Department of RadiologyCanary Center at Stanford for Cancer Early DetectionStanford UniversityStanfordCA 94305-5344USA University of North Texas Biomedical EngineeringDentonTX 76207USA Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong 518055China Department of Neurology Xiangya HospitalCentral South UniversityXiangya Road 88ChangshaHunan 410008China Stanford Cardiovascular Institute StanfordCA 94305USA Division of Cardiology Department of Internal MedicineChang Gung Memorial HospitalLinkouTaiwan33305China

Stem cell therapy holds high promises in regenerative *** major challenge of clinical translation is to precisely and quantitatively evaluate the in vivo cell distribution,migration,and engraftment,which cannot be easily achieved by current *** address this issue,for the first time,we have developed a molecular cell tracker with a strong fluorescence signal in the second near-infrared(NIR-II)window(1,000-1,700 nm)for real-time monitoring of in vivo cell behaviors in both healthy and diseased animal *** NIR-II tracker(CelTrac1000)has shown complete cell labeling with low cytotoxicity and profound long-term tracking ability for 30 days in high spatiotemporal resolution for semiquantification of the biodistribution of transplanted stem *** advantage of the unique merits of CelTrac1000,the responses of transplanted stem cells to different diseased environments have been discriminated and ***,we also demonstrate CelTrac1000 as a universal and effective technique for ultrafast real-time tracking of the cellular migration and distribution in a 100μm single-cell cluster spatial resolution,along with the lung contraction and heart *** such,this NIR-II tracker will shift the optical cell tracking into a single-cell cluster and millisecond temporal resolution for better evaluating and understanding stem cell therapy,affording optimal doses and efficacy.

关键词： doses distribution holds

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A restraining multipath effect method for the measurement of insertion loss of underwater acoustic materials

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Chinese Journal of Acoustics 2020年第2期39卷 229-240页

作者： SUN Min wang yuebing ZHENG Huifeng ZHAO Peng WU Lizhuo College of Metrological Technology and Engineering China Jiliang UniversityHangzhou 310018

A method suppressing multipath effect when measuring the underwater acoustic materials in a reverberant field is proposed, which is called "virtual end-fire array method".To weaken the coherence of the same-frequency reflection interference of each path, signal of different phases at different positions was transmitted by a single transducer in the simulation design, and a sharp directionality in the direction of the array length was formed. All signals at the above positions were superimposed to eliminate the clutters. The insertion loss(IL) of the material was finally calculated by extracting the desired waveforms. In the measured frequency range of 3–20 k Hz, the aluminum plate with size of 1.1 m × 1.0 m × 8 mm and the round aluminum plate with 0.5 m in diameter and 8 mm in thickness were measured in a reverberant tank with size of 5.5 m × 3.5 m × 3.5 m. Results showed the measured lowest effective frequency limit can be reduced by the virtual end-fire array technique compared with the conventional *** the measurement of round aluminum plate and rectangular aluminum plate, errors in the effective measurement band was less than 0.5 d B and the interference of the acoustic multipath propagation effects was reduced effectively. The ability of the transducer in reverberant tank to measure acoustic materials has been improved after implementing this method.

关键词： insertion plate method

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The application of laser reflective tomography in near-field measurements of ultrasonic transducers

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Chinese Journal of Acoustics 2014年第3期33卷 257-266页

作者： wang yuebing wang Shiquan China Jiliang University Hangzhou Applied Acoustic Research Institute

With Laser Reflective Tomography（LRT）,the near fields of ultrasonic transducers were measured and *** principle of LRT measurement of ultrasonic field distribution was introduced and an experimental system was set *** pressure of a multiple element piston transducer was measured by using of a laser *** distribution in amplitude and phase was *** acoustic pressure in the same region was measured with a needle hydrophone to validate the LRT ***,through reconstruction of acoustic fields,it indicated that LRT method is suitable for predicting the distribution on transducers＇surface and conditions of active elements.

关键词： The application of laser reflective tomography in near-field measurements of ultrasonic transducers LRT

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Seismogenic structure of the 2016 Ms6.4 Menyuan earthquake and its effect on the Tianzhu seismic gap

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Geodesy and Geodynamics 2016年第4期7卷 230-236页

作者： Yanbao Li Weijun Gan yuebing wang Weitao Chen Shiming Liang Keliang Zhang Yongqi Zhang State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China National Earthquake Infrastructure Service China Earthquake AdministrationBeijing 100036China Earthquake Administration of Shanxi Province Xi'an 710068China

On January 21, 2016, a strong earthquake with a magnitude of Ms6.4 occurred at Menyuan, Qinghai Province of China. In almost the same region, there was another strong earthquake happened in 1986, with similar magnitude and focal mechanism. Based on comprehensive analysis of regional active faults, focal mechanism solutions, precise locations of aftershocks, as well as GPS crustal deformation, we inferred that the Lenglongiing active fault dips NE rather than SW as suggested by previous studies. Considering the facts that the 2016 and i986 Ms6.4 Menyuan earthquakes are closely located with similar focal mechanisms, both of the quakes are on the north side of the Lenglongling Fault and adjacent to the fault, and the fault is dipping NE direction, we suggest that the fault should be the seismogenic structure of the two events. The Lenglongling Fault, as the western segment of the well-known Tianzhu seismic gap in the Qilian-Haiyuan active fault system, is in a relatively active state with frequent earthquakes in recent years, implying a high level of strain accumulation and a high potential of major event. It is also possible that the Lengiongiing Fault and its adjacent fault, the Jinqianghe Fault in the Tianzhu seismic gap, are rupturing simultaneously in the future.

关键词： 2016 Ms6.4 Menyuan earthquake Seismogenic structure Tianzhu seismic gap Qilian-Haiyuan fault system

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Characteristics of regional crustal deformation before 2016 Menyuan Ms6.4 earthquake

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Geodesy and Geodynamics 2016年第4期7卷 275-283页

作者： Weitao Chen Weijun Gan Genru Xiao yuebing wang Weiping Lian Shiming Liang Keliang Zhang National Earthquake Infrastructure Service China Earthquake AdministrationBeijing 100036China State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China Faculty of Geomatics East China University of TechnologyFuzhou 344000China

On January 21, 2016, a strong earthquake with a magnitude of Ms6.4 happened at Menyuan, Qinghai Province of China. In almost the same place, there was another strong earthquake happened in 1986, with similar magnitude and focal mechanism. In this paper, we analyze the characteristics of regional crustal deformation before the 2016 Menyuan Ms6.4 earth- quake by using the data from 10 continuous Global Positioning System （GPS） stations and 74 campaign-mode GPS stations within 200 km of this event：（a） Based on the velocity field from over ten years GPS observations, a regional strain rate field is calculated. The results indicate that the crustal strain rate and seismic moment accumulation rate of the Qilian- Haiyuan active fault, which is the seismogenic tectonics of the event, are significantly higher than the surrounding regions. In a 20 km~ 20 km area around the seismogenic region, the maximum and minimum principal strain rates are 21.5 nanostrain/a （NW-SE extension） and -46.6 nanostrain/a （NE-SW compression）, respectively, and the seismic moment accumulation rates is 17.4 Nm/a. The direction of principal compression is consistent with the focal mechanism of this event. （b） Based on the position time series of the continuous GPS stations for a time-span of about 6 years before the event, we calculate the strain time series. The results show that the dilatation of the seismogenic region is continuously reduced with a ＂non-linear＂ trend since 2010, which means the seismogenic region has been in a state of compression. However, about 2-3 months before the event, both the dilatation and maximum shear strain show significant inverse trends. These abnormal changes of crustal deformation may reflect the non-linear adjustment of the stress-strain accumulation of the seismogenic region, when the accumulation is approaching the critical value of rupture.

关键词： 2016 Menyuan Ms6.4 earthquake GPS observation Crustal deformation Seismic moment accumulation rate Dilatation Maximum shear strain

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水声无源材料插入损失虚拟聚焦测量方法

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声学学报 2021年第2期46卷 237-245页

作者：吴登苍王月兵中国计量大学计量测试工程学院杭州310018

提出了一种适合在有限尺寸水池中测量水声材料插入损失的方法,称为"虚拟聚焦法"。该方法利用一弧形发射阵以一定规则对样品进行扫描,通过对接收数据进行叠加处理,使得同频声干扰贡献随机化和无规则化,从而提取出反映材料声参数的透射波... 详细信息

提出了一种适合在有限尺寸水池中测量水声材料插入损失的方法,称为"虚拟聚焦法"。该方法利用一弧形发射阵以一定规则对样品进行扫描,通过对接收数据进行叠加处理,使得同频声干扰贡献随机化和无规则化,从而提取出反映材料声参数的透射波信号。在尺寸为5.5 m×3.5 m×3.5 m的非消声水池,测量频率为2~15 kHz,对1.1 m×1 m×8 mm标准铝板样品和1 m×1 m×35 mm聚氨酯材料样品进行了测量,结果表明测量值与理论值有较好的吻合,测量不确定度为2.0 dB(k=2)。

关键词：插入损失测量不确定度随机化测量频率聚氨酯材料水声材料接收数据透射波

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针对3×3耦合器幅相非对称的光纤水听器解调方法

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仪器仪表学报 2023年第2期44卷 32-41页

作者：张硕王敏王珂杨平王月兵中国计量大学计量测试工程学院杭州310018 中国计量科学研究院北京100029

基于3×3耦合器法的光纤水听器解调容易受耦合器分光比非理想对称特性影响,导致水听器解调结果及测量信号不准确。为解决实际中3×3耦合器普遍存在的幅度、相位非对称引入的解调偏差问题,提出基于微分交叉相乘的干涉信号幅度和相位修正... 详细信息

基于3×3耦合器法的光纤水听器解调容易受耦合器分光比非理想对称特性影响,导致水听器解调结果及测量信号不准确。为解决实际中3×3耦合器普遍存在的幅度、相位非对称引入的解调偏差问题,提出基于微分交叉相乘的干涉信号幅度和相位修正解调方法。通过对三路非对称干涉信号进行两两最小二乘椭圆拟合,得到干涉信号的实际幅度和相位参数,经去直流、归一化消除幅度不对称,并将所得包含非对称相位信息的信号两两微分交叉相乘,经三角函数变换解算信号相位及其修正系数,从而实现对光纤水听器输出信号的准确解调。仿真对比了本文方法和仅考虑幅度非对称情况的解调结果,并分析比较了两种处理方法随声信号频率、幅值变化的解调误差,前者得到接近理想信号波形的解调结果和更小的解调误差。依托消声水池开展了光纤水听器解调实验,在5~30 kHz频率范围对解调方法进行了对比验证,证明了本文解调方法的有效性和稳定性。

关键词：光纤水听器解调 3×3耦合器法幅相非对称性相位修正解调

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