检索结果-南通市图书馆

Journal of High Energy Physics, Gravitation and Cosmology 2024年第1期10卷 149-157页

作者： Michael E. Nitsche Z & S Institut Grosselfingen Germany

The fluctuating planetary gravitational field influences not only activities on the Sun but also on the Earth. A special correlation function describes the harmonics of these fluctuations. Groups of earthquakes form oscillation patterns that differ significantly from randomly chosen control groups. These patterns are suitable as an element of an AI for the probability of earthquakes.

关键词： Planetary Gravitational Field earthquake prediction AI

Studies and experiments on earthquake prediction during 1999～2002

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Seismologica Sinica(English Edition) 2003年第5期16卷 508-521页

作者：张晓东傅征祥张永仙牛安福黄辅琼彭克银卢军 Center for Analysis and prediction China Seismological Bureau

This paper briefly reviewed the research progresses of earthquake prediction and/or forecasting in China during 1999~2002, especially focused on mid-short term prediction methods with approaches of seismicity, crustal deformation, electromagnetism, ground water and the analysis by synthesis, and the application of the methods to the practice of earthquake prediction.

关键词： earthquake prediction seismicity crustal deformation electromagnetism underground water analysis by synthesis progress

Research　on　nonlinear　R／S　method　and　its　application　in　earthquake　prediction

在线全文

学校读者我要写书评

暂无评论

Acta Seismologica Sinica(English Edition) 1995年第4期8卷 653-658页

作者：王碧泉黄汉明范洪顺王春珍陈佩燕 Institute of Geophysics State Seismological Bureau Beijing China

ＲｅｓｅａｒｃｈｏｎｎｏｎｌｉｎｅａｒＲ／ＳｍｅｔｈｏｄａｎｄｉｔｓｐｐｌｉｃａｔｉｏｎｉｎｅａｒｔｈｑｕａｋｅｐｒｅｄｉｃｔｉｏｎＢｉ－ＱｕａｎＷＡＮＧ（王碧泉）；Ｈａｎ－ＭｉｎｇＨＵＡＮＧ（黄汉明）；Ｈｏｎｇ－Ｓ... 详细信息

ＲｅｓｅａｒｃｈｏｎｎｏｎｌｉｎｅａｒＲ／ＳｍｅｔｈｏｄａｎｄｉｔｓｐｐｌｉｃａｔｉｏｎｉｎｅａｒｔｈｑｕａｋｅｐｒｅｄｉｃｔｉｏｎＢｉ－ＱｕａｎＷＡＮＧ（王碧泉）；Ｈａｎ－ＭｉｎｇＨＵＡＮＧ（黄汉明）；Ｈｏｎｇ－ＳｈｕｎＦＡＮ（范洪顺）；Ｃｈｕｅｎ...

关键词： nonlinear theory fractal dimension earthquake prediction R/S method

V_p/V_s Anisotropy and Implications for Crustal Composition Identification and earthquake prediction

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2009年第4期83卷 801-815页

作者： WANG Qian JI Shaocheng XU Zhiqin Departement des Genies Civil Geologique et des Mines Ecole Polytechnique de Montreal Montreal H3C 3A7 Canada Key Laboratory of Continental Dynamics Ministry of Land and Resources Chinese Academy of Geological Sciences 10037 Beijing China

The ratio of P- to S-wave velocities （Vp/Vs） is regarded as one of the most diagnostic properties of natural rocks. It has been used as a discriminant of composition for the continental crust and provides valuable constraints on its formation and evolution processes. Furthermore, the spatial and temporal changes in Vp/Vs before and after earthquakes are probably the most promising avenue to understanding the source mechanics and possibly predicting earthquakes. Here we calibrate the variations in Vp/Vs in dry, anisotropic crustal rocks and provide a set of basic information for the interpretation of future seismic data from the Wenchuan earthquake Fault zone Scientific Drilling （WFSD） project and other surveys. Vp/Vs is a constant （Ф0） for an isotropic rock. However, most of crustal rocks are anisotropic due to lattice-preferred orientations of anisotropic minerals （e.g., mica, amphibole, plagioclase and pyroxene） and cracks as well as thin compositional layering. The Vp/Vs ratio of an anisotropic rock measured along a selected pair of propagation-vibration directions is an apparent value （Фy） that is significantly different from the value for its isotropic counterpart （Ф0）. The usefulness of apparent Vp/Vs ratios as a diagnostic of crustal composition depends largely on rock seismic anisotropy. A 5% of P- and S-wave velocity anisotropy is sufficient to make it impossible to determine the crustal composition using the conventional criteria （Vp/Vs≤1.756 for felsic rocks, 1.756〈Vp/Vs≤1.809 for intermediate rocks, 1.809〈Vp/Vs≤1.944 for mafic rocks, and Vp/V2〉1.944 fluidfilled porous/fractured or partially molten rocks） if the information about the wave propagation-polarization directions with respect to the tectonic framework is unknown. However, the variations in Vp/Vs measured from borehole seismic experiments can be readily interpreted according to the orientations of the ray path and the polarization of the shear waves with respect to the present-day principal stress directions （i.e., the orientation of cracks）

关键词： Vp/Vs ratio Seismic anisotropy Crustal composition earthquake prediction

New indexes and methods in earthquake prediction research

在线全文

学校读者我要写书评

暂无评论

Acta Seismologica Sinica(English Edition) 1994年第2期7卷 331-332,334-342页

作者：冯德益大内

This paper gives a brief introduction to a few new indexes and methods published in recent issues of seismological literature which have been explored especially by the authors and many of their collaborators for applying in earthquake prediction research. The new indexes include the statistical indexes of seismicity (Morishita index Iδ, the parameters C and b-value spectrum derived from the magnitude-frequency relation, etc. )and indexes describing the dynamical characteristics of seismic waves obtained from digitized seismologicrecords (wave form linearities, spectral characteristics, etc. ). The new methods fall into two categories:namely the methods of non-linear sciences (fractal analysis, self-similarity and self-organization structure,neural network) and graphical analysis methods of multi-dimensional data (face analysis, projection pursuit,chronogeometric analysis ).

关键词： seismicity seismic wave non-linear sciences multi-dimensional data earthquake prediction

Expert　system　for　earthquake　prediction（ESEP）（2）－Knowledge　representation　and　evidence　combination

在线全文

学校读者我要写书评

暂无评论

earthquake Science 1994年第S1期7卷 23-29页

作者：范洪顺王碧泉

This paper deals with knowledge representation of ESEP (Expert System for Earthqauke prediction). Attending the characteristics of the knowledge in earthquake prediction domain, production representation and procedural representation are connected in the knowledge repesentation model of ESEP named ESEP/K, and three new ways of evidence conbination are proposed for production rules besides 'AND' and 'OR'.

关键词： expert system ESEP knowledge representation evidence combination earthquake prediction

Catastrophic failure mechanism of rock masses system and earthquake prediction based on percolation theory

在线全文

学校读者我要写书评

暂无评论

Rock Mechanics Bulletin 2022年第1期1卷 119-125页

作者： Zhaoxing Lv Yangsheng Zhao Zijun Feng Key Laboratory of In-situ Property-improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China College of Mining Engineering Taiyuan University of TechnologyTaiyuan030024China

The failure of rocks is a complicated process as the mechanical properties of the rock are governed by loading history and cumulative ruptures.The geometric aspects of fractures,such as the size and shape of the fractures,the spatial distribution of the fracture networks,and the relations among these aspects also depend on the loads acting on rock mass.In general,the fractures are randomly generated in space which is difficult to be described using mathematical methods.In this paper,the failure processes of rock have been analyzed using the percolation theory.The results indicate that the failure process of rock is a transition from a stable state to an unstable state.This phenomenon is essentially consistent with the phase transition in the percolation theory.Based on this consistency,a theoretical model of percolation for earthquake prediction is proposed.A large number of seismic data provided strong evidence in support of the reliability and applicability of this model.

关键词： Rock mass system Failure process Fracture earthquake prediction Percolation theory

An scientific evaluation of annual earthquake prediction ability

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Seismologica Sinica(English Edition) 2002年第5期15卷 550-558页

作者：张国民刘杰石耀霖 Center for Analysis and prediction China Seismological Bureau Beijing 100036 China Graduate School Chinese Academy of Sciences Beijing 100039 China

The scientific idea of earthquake prediction in China is introduced in this paper. The various problems on evaluation of earthquake prediction ability are analyzed. The practical effect of prediction on annual seismic risk areas in 1990~2000 in China is discussed based on R-value evaluation method, and the ability of present earthquake prediction in China is reviewed.

关键词： earthquake prediction annual consulation prediction evaluation

Cross-fault Newton force measurement for earthquake prediction

在线全文

学校读者我要写书评

暂无评论

Rock Mechanics Bulletin 2022年第1期1卷 33-52页

作者： Manchao He Shulin Ren Zhigang Tao State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining&Technology(Beijing)Beijing100083China School of Mechanics and Civil Engineering China University of Mining&Technology(Beijing)Beijing100083China

earthquake prediction is a common scientific challenge for academics worldwide.This dilemma originates from the lack of precursory indicators that meet the sufficient and necessary conditions of earthquake occurrence,which may be the root cause of the failure of earthquake prediction.In light of this,a double-block catastrophic mechanics theory for earthquakes based on cross-fault Newton force measurement is proposed herein.Based on this theory and laboratory physical model tests of seismic Newton force monitoring,a new academic thought is envisioned“the sufficient and necessary condition for earthquake occurrence is the change of Newton force,and the sudden drop of Newton force on the fault surface can be used as a predictor of earthquake disaster.”Several equipment systems have been independently developed,and the technology has been successfully applied to engineering practice.This concept has currently been proven in small-scale double-block catastrophic events such as landslides.Based on the double-block catastrophic mechanics theory,landslides and earthquakes have the similar nature but different scales.According to the on-site monitoring of landslides,it is verified that the sudden drop of Newton force can be used as a predictor of landslide disaster which successfully solves the problem of short-term landslide prediction.The introduction of cross-fault Newton force measurement technology and idea has laid a foundation for improving the method and level of international earthquake monitoring and solving the world-class scientific problem of short-term earthquake prediction.

关键词： earthquake prediction Cross-fault Change of Newton force Double-block catastrophic mechanics theory Seismogenic fault

An　approach　on　dynamic　earthquake　prediction　by　georesistivitymeasurements

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Seismologica Sinica(English Edition) 1996年第3期9卷 79-86页

作者：张洪魁沈启兴吴卫赵玉林毛桐恩

Experiences on earthquake prediction accumulated by the Chinese scientists in the last 20 years were synthetically analyzed. A prediction program was set up to demonstrate the development of the georesistivity anomaly by using of the dynamic image, accordingly the earthquake prone area can be recognized. By revising the DYBS Ⅰ, which was developed in 1989, and adding some latest achievements, we worked out a software on earthquake prediction by the geoelectric method the DYBS Ⅱ. Some new feature of DYBS Ⅱ are: the anomalous area may be determined by the space distribution and its time variation of geoelectric parameters; The dynamic process that is associated with the development of earthquake anomaly can be displayed on the computer screen; Technique for the prediction of an impending earthquake was included too. Some results of the Tangshan earthquake were presented at the end of this paper.

关键词： earthquake prediction georesistivity precursor identification model dynamic image parameter.