CODA

作品数:94被引量:136H指数:6
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Simultaneous inversion of seismic scattering and absorption attenuation using coda energies
《Science China Earth Sciences》2024年第12期3939-3949,共11页Jia WEI Qiancheng LIU Ling CHEN Liang ZHAO 
supported by the National Key R&D Program of China(Grant No.2023YFF0803203);the National Natural Science Foundation of China(Grant Nos.42288201,42404133);the Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology(Grant No.2022B1212010002);the China Postdoctoral Science Foundation(Grant No.2023T160639)。
Simultaneous inversion of scattering and absorption attenuation is of great significance for investigating small-scale inhomogeneities and inelastic properties of the subsurface.However,applying this to complex geophy...
关键词:Scattering attenuation Absorption attenuation Simultaneous inversion Coda energy 
微分形式代数上的半对称不保度量联络
《东北师大学报(自然科学版)》2024年第2期48-52,共5页吴彤 
国家自然科学基金资助项目(11771070).
引入了Levi-Civita联络的半对称不保度量扰动,即微分形式代数上的半对称不保度量联络.计算了它在微分形式代数上的曲率张量及其Ricci张量.研究了在微分形式代数上的分布,得到了半对称不保度量联络的Gauss-Codazzi-Ricci等式.
关键词:微分形式代数 半对称不保度量联络 Gauss-Codazzi-Ricci等式 
Effect of Measurement Error on the Multivariate CUSUM Control Chart for Compositional Data
《Computer Modeling in Engineering & Sciences》2023年第8期1207-1257,共51页Muhammad Imran Jinsheng Sun Fatima Sehar Zaidi Zameer Abbas Hafiz Zafar Nazir 
supported by the National Natural Science Foundation of China (Grant No.71802110);the Humanity and Social Science Foundation of theMinistry of Education of China (Grant No.19YJA630061).
Control charts(CCs)are one of the main tools in Statistical Process Control that have been widely adopted in manufacturing sectors as an effective strategy for malfunction detection throughout the previous decades.Mea...
关键词:MCUSUM chart CODA measurement error manufacturing process PERFORMANCE 
Moment magnitudes of two large Turkish earthquakes on February 6,2023 from long-period coda被引量:7
《Earthquake Science》2023年第2期169-174,共6页Xinyu Jiang Xiaodong Song Tian Li Kaixin Wu 
the National Key R&D Program of China(No.2022YFF0800601);the National Natural Science Foundation of China(No.U1939204).
Two large earthquakes(an earthquake doublet)occurred in south-central Turkey on February 6,2023,causing massive damages and casualties.The magnitudes and the relative sizes of the two mainshocks are essential informat...
关键词:2023 Turkish earthquakes coda wave moment magnitude long-period 
Temporal variations in coda attenuation associated with the 2008 Wenchuan(M_(W)7.9)Earthquake in SW,China
《Geodesy and Geodynamics》2021年第6期424-440,共17页Junhua Hu Guoxin Zhang Liyun Fu Yan Zhang Songhui Li 
supported by the National Natural Science Foundation of China(No.41874161 and No.41720104006);the Youth Innovation Promotion Association Foundation of the Chinese Academy of Sciences(No.2019069);Guangdong Provincial Key R&D Program(No.2019B111105002)。
In this study,waveform data obtained from Western Sichuan Seismic Array(WSSA)in China was utilized to reveal the temporal variations in coda attenuation around the eastern Tibet Plateau and Western Sichuan.Based on th...
关键词:Wenchuan earthquake Single-scattering model Coda attenuation Tectonic static stress 
On the generation and decay of the long-period coda energy of large earthquakes被引量:1
《Earthquake Science》2021年第2期103-113,共11页Xinyu Jiang Xiaodong Song Han H.Xia Richard L.Weaver 
the National Natural Science Foundation of China(No.U1939204).
Seismic coda wave is the tail portion of the earthquake record after main arrivals.Studies on the coda usually focus on high-frequency data within several hours after regional events and attribute them to the scatteri...
关键词:long-period coda waves large earthquakes geometric spreading ATTENUATION scattering. 
计算机辅助二语动态评估系统PELDiaG和CODA的比较研究
《现代语言学》2021年第1期231-242,共12页何惠勤 
本文介绍和比较了两个典型的计算机辅助二语动态评估在线系统PELDiaG和CODA,从诊断试题命制、干预方式以及迁移任务的设计等方面对比分析二者的异同,以期为智能化的二语动态评估研究的发展提供借鉴。二者从社会文化理论出发,以动态评估...
关键词:动态评估 诊断性评估 计算机辅助教学 第二语言评估 
Upper crustal Poisson's ratio and coda-wave attenuation beneath Eastern Anatolia
《Earthquake Engineering and Engineering Vibration》2020年第2期335-347,共13页Ufuk Aydin Sakir Sahin Mohamed K.Salah 
The attenuation of seismic waves reflects the elastic nature of the media within which the waves propagate.In this study,we calculate the Coda-Q(Qc),frequency dependence(η),Vp/Vs and Poisson's(υ)ratios by using 2621...
关键词:Coda-Q(Qc) Eastern Anatolia Poisson's ratio(υ) SEISMOTECTONICS upper crustal structure 
CODA声呐成像系统在防波堤扭王字块可视化安装中的应用被引量:2
《广东土木与建筑》2020年第5期70-74,共5页夏晓露 聂洪斌 刘竞辉 
扭王字块作为防波堤的护面块体,具有消浪、减浪的作用,其安装质量直接影响着防波堤的结构功能和堤身安全,传统盲装或潜水员配合安装工艺具有局限性,不利于扭王块安装质量控制。结合某深水防波堤项目,探索采用声呐成像系统辅助安装扭王字...
关键词:防波堤 扭王字块 声呐成像 可视化安装 
Monitoring Contact State of Laboratory Fault with Coda Transmission Waves被引量:1
《Earthquake Research in China》2019年第3期431-436,共6页XIE Fan REN Yaqiong HOU Jinxin 
sponsored by the National Natural Science Foundation of China(41874061)
We monitored the amplitude changes of coda transmission waves around 500 kHz across the frictional interface of a simulated 1. 5-meter-long fault during normal stress holding test.We find that the amplitude of coda tr...
关键词:CODA transmission waves LABORATORY FAULT Frictional contact area 
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