PRECURSORY

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Experimental study on failure precursory characteristics and moisture content effect of pre-cracked rocks under graded cyclic loading and unloading
《International Journal of Mining Science and Technology》2025年第2期249-264,共16页Wei Zhang Dongxiao Zhang Weiyao Guo Baoliang Zhang 
financially supported by National Natural Science Foundation of China(No.52304136);Young Talent of Lifting Engineering for Science and Technology in Shandong,China(No.SDAST2024QTA060);Key Project of Research and Development in Liaocheng(No.2023YD02)。
It is important to analyze the damage evolution process of surrounding rock under different water content for the stability of engineering rock mass.Based on digital speckle correlation(DSCM),acoustic emission(AE)and ...
关键词：Damage mechanisms Pre-cracked rocks Crack propagation Water-rock interaction Graded cyclic loading and unloading 
Major Asperities that Ruptured in Large California Earthquakes, Surrounding Pre-Shocks, and Some Yearly to Decadal Precursory Changes in Seismic Activity
《International Journal of Geosciences》2025年第1期99-125,共27页Lynn R. Sykes 
Double-difference locations of forerunning shocks of seismic magnitude, M, 2 to 6 are examined in the months to decades before 11 mainshocks in California of magnitude 6 and larger. Each of the 11 had large quiet zone...
关键词：Active Faults Plate Boundaries California Double-Difference Locations San Andreas Fault ASPERITIES Forecasts Predictions SEISMOLOGY 
Acquisition of acoustic emission precursor information for rock masses with a single joint based on clustering-convolutional neural network method
《Journal of Rock Mechanics and Geotechnical Engineering》2024年第12期5061-5076,共16页Peiyao Xie Weizhong Chen Wusheng Zhao Hou Gao 
support from the National Natural Science Foundation of China(Grant Nos.52079134 and 51991393).
The method for precursor information acquisition based on acoustic emission(AE)data for jointed rock masses is of significant importance for the early warning of dynamic disasters in underground engineering.A clusteri...
关键词：Acoustic Emission(AE) Precursor information acquisition Precursory indicator Clustering-Convolutional Neural Network (CNN)method Rock mass failure Single joint 
Precursory atmospheric teleconnection patterns for strong Siberian High events
《Atmospheric and Oceanic Science Letters》2023年第5期17-21,共5页Jian Song Ning Shi Qilei Huang 
the National Natural Science Foundation of China[grant numbers 42025502 and 41975063];the Qing Lan Project.
本文利用日本55年逐日再分析资料,发现在SH异常增强前,有三种不同的大气遥相关型前兆信号,即斯堪的纳维亚(SCA)型,西太平洋(WP)型,极地-欧亚(POL)型据此,本文将异常增强的SH分为对应的三类事件.合成结果表明,三类事件在典型环流特征和...
关键词：西伯利亚高压 大气遥相关 气温异常 
Experimental study on the infrared precursor characteristics of gas-bearing coal failure under loading被引量：4
《International Journal of Mining Science and Technology》2021年第5期901-912,共12页Shan Yin Zhonghui Li Dazhao Song Xueqiu He Liming Qiu Quan Lou He Tian 
supported by the National Natural Science Foundation of China(No.52074280);the National Natural Science Foundation of China(No.52004016);the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions。
The stress and gas pressure in deep coal seams are very high,and instability and failure rapidly and intensely occur.It is important to study the infrared precursor characteristics of gas-bearing coal instability and ...
关键词：Gas–bearing coal Gas pressure Infrared temperature Infrared thermal image Infrared precursory law 
Erratum to:Experimental investigation on predicting precursory changes in entropy for dominant frequency of rockburst
《Journal of Central South University》2021年第3期981-981,共1页
Because of an unfortunate mistake during the production of this article,the initial printed versions and the online PDF had incorrect DOI numbers.The DOI has now been corrected and synchronized with the correct DOIs o...
关键词：ENTROPY PRECURSORY predicting 
Experimental investigation on predicting precursory changes in entropy for dominant frequency of rockburst被引量：10
《Journal of Central South University》2020年第10期2834-2848,共15页WANG Chun-lai CHEN Zeng LIAO Ze-feng HOU Xiao-lin LI Hai-tao WANG Ai-wen LI Chang-feng QIAN Peng-fei LI Guang-yong LU Hui 
Project(2017YFC0804201)supported by the National Key Research and Development Program of China;Project(51574246)supported by the National Natural Science Foundation of China;Project(2011QZ01)supported by Fundamental Research Funds for the Central Universities,China;Project(C201911362)supported by the National Training Program of Innovation and Entrepreneurship for Undergraduates,China。
Rockburst is a dynamic phenomenon accompanied by acoustic emission(AE)activities.It is difficult to predict rockburst accurately.Based on the fast Fourier transform(FFT)method and the information entropy theory,the ev...
关键词：ROCKBURST precursory information acoustic emission information entropy dominant frequency evolution model 
Possible precursory anomalies in ground water level associated with the Wenchuan Ms 8.0 earthquake in 2008,Sichuan,China
《Geodesy and Geodynamics》2020年第2期127-134,共8页Chenglong Liu Guangcai Wang Zheming Shi Dan Zhao Hui Zhang 
supported by the National Natural Science Foundation of China(41572238,U1602233);Special Funds for Scientific Research of the Institute of Geology,China Earthquake Administration(IGCEA1205);Special Projects for Seismological Community(200808079).
We have examined the water level data from 16 wells in Sichuan province,China,recorded before the Wenchuan Ms8.0 earthquake occurred in 2008.We found that the data of 5 among these wells exhibit possible precursory an...
关键词：WENCHUAN EARTHQUAKE PRECURSORY ANOMALIES Ground water level Temporal-spatial distribution SICHUAN PROVINCE 
Structural phase transition, precursory electronic anomaly, and strong-coupling superconductivity in quasi-skutterudite (Sr1-xCax)3Ir4Sn13 and Ca3Rh4Sn13
《Chinese Physics B》2018年第7期163-170,共8页Jun Luo Jie Yang S Maeda Zheng Li Guo-Qing Zheng 
Project supported by the National Natural Science Foundation of China(Grant Nos.11674377 and 11634015);the National Key R&D Program of China(Grant Nos.2017YFA0302904 and 2016YFA0300502);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB07020200);supported by the Youth Innovation Promotion Association of CAS
The interplay between superconductivity and structural phase transition has attracted enormous interest in recent years. For example, in Fe-pnictide high temperature superconductors, quantum fluctuations in associatio...
关键词：nuclear magnetic resonance antiferromagnetic fluctuation structural phase transition phase diagram 
Temporal and Spatial Evolution of Precursory Anomalies of the Wenchuan MS8.0 Earthquake and Their Mechanical Analysis
《Earthquake Research in China》2018年第2期212-226,共15页Zhang Xiaotao Liu Jie Song Zhiping Xue Yan Zhang Yongxian Yan Rui Yuan Zhengyi 
funded by the Spark Program of Earthquake Sciences(XH17048);the Task-oriented Earthquake Tracing Project of China Earthquake Administration(2018010505)
In order to study the spatiotemporal evolution of the precursory anomalies 10 years before the Wenchuan M_S8. 0 earthquake in 2008, the epicentral distance of the precursory anomalies is calculated by using the geomet...
关键词：WENCHUAN M S8.0 EARTHQUAKE Precursor ANOMALY Spatio-temporal Evolution Three-stages feature 
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