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Statistical analysis on energy field of seismicity in Ningxia and its neighborhood region 被引量:2
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作者 YANG Ming-zhi(杨明芝) +1 位作者 ZHAO Wei-ming(赵卫明) 《Acta Seismologica Sinica(English Edition)》 CSCD 2004年第5期571-577,共8页
The random function theory is used in the paper. Taking the regional seismicity energy as the random function of space and time, the features of small seismicity field in Ningxia and its neighborhood region are studie... The random function theory is used in the paper. Taking the regional seismicity energy as the random function of space and time, the features of small seismicity field in Ningxia and its neighborhood region are studied by the analytical method of natural orthogonal function expansion. The chief part of the field, i.e., the temporal changes of time weight coefficients of first several typical fields is analyzed. We have found that their values had upward and downward changes of a large amplitude before moderate-strong earthquakes and showed variation features correlating to moderate-strong earthquakes occurred in the region and its surrounding areas. From the earthquake examples in Ningxia region, we can make the conclusion that the method of natural orthogonal function expansion of earthquake energy stochastic field is an earthquake analysis and prediction method that is worth further exploration. 展开更多
关键词 earthquake energy field natural orthogonal EXPANSION prediction method
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Analysis of Space-time Characteristics of Energy Field of Seismicity in Jiangsu and Its Neighboring Areas
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作者 Wang Jun Sun Yejun Zhan Xiaoyan Zheng Jiangrong Jiang Haolin Huo Zhuqing 《Earthquake Research in China》 2010年第4期445-455,共11页
The paper analyzes the variation characteristics of energy fields of seismicity 2.1≤M L ≤4.5 in Jiangsu and its neighboring areas during the period between January 1970 and December 2007.It also analyzes the variati... The paper analyzes the variation characteristics of energy fields of seismicity 2.1≤M L ≤4.5 in Jiangsu and its neighboring areas during the period between January 1970 and December 2007.It also analyzes the variations of time "weight" coefficients of the major typical energy fields,using random function theory with seismic energy fields as a space-time random function field based on Empirical Orthogonal Function (EOF) expansion methods.The results show that the expansion accuracy of the first seven typical fields is 0.9244.The strength of seismic energy varies remarkably in different tectonic blocks in the study area.High value areas are in middle and southern Jiangsu,and the south Yellow Sea.The distribution of the typical fields also shows that it is an area that affects most significantly the seismic energy fields of the study region.The time "weight" coefficients of the first six typical fields vary with time,and the amplitude of the variations has strong temporal correlations with moderate-strong earthquakes in the region. 展开更多
关键词 Jiangsu and earthquakes its neighboring areas energy Empirical Orthogonal Function field of moderate and small Space-time characteristics
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Recent crustal movement and great earthquakes in Qinghai-Tibet sub-plate 被引量:2
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作者 Guo Liangqian Bo Wanju Yang Guohua Chen Juzhong Guo He 《Geodesy and Geodynamics》 2011年第3期50-55,共6页
Crustal movement and incremental-movement data observed repeatedly at GPS stations during 1999 -2009 were analyzed to study the effect of two earthquakes of Ms8.1 and Ms8.0 that occurred in 2001 and 2008, respectively... Crustal movement and incremental-movement data observed repeatedly at GPS stations during 1999 -2009 were analyzed to study the effect of two earthquakes of Ms8.1 and Ms8.0 that occurred in 2001 and 2008, respectively, in Qinghai-Tibet sub-plate and its eastern margin. The result revealed certain anoma- lous pre-earthquake deformation and some large co-seismic changes. Prior to the 2008 Wcnchuan Ms8.0 earthquake, the seismogenic Kunlunshan fault zone became a geographic boundary between different regional movements. At the time of the earthquake, there was an average cross-fault crustal shortening of - 1.04 m and an average right-lateral strike slip of 0.76 m along the ruptured segment, as well as a strain-energy release of -62.66 ×10.7. 展开更多
关键词 Qinghai-Tibet sub-plate' s movement field tectonic activity movement incremental field earth-quake deformation strain energy Wenchuan earthquake
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Analysis and Study on the Change of the Observed Geo-electric Field Data at Lhasa Geomagnetic Station before and after the Nepal MS8.1 Earthquake
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作者 Xi Jilou Guan Huaping +7 位作者 Liu Chao Zhuang Nan Guan Xinying Yang Xiaoming Zhang Zhiguo Ci Zhuoga Kelsang Drolma Ma Aiming 《Earthquake Research in China》 CSCD 2016年第4期526-541,共16页
In this paper,the main purpose is to analyze and research the characteristics of the geoelectric field observed data with a long time span and large amplitude abnormal change,at the Lhasa geomagnetic station( hereafte... In this paper,the main purpose is to analyze and research the characteristics of the geoelectric field observed data with a long time span and large amplitude abnormal change,at the Lhasa geomagnetic station( hereafter referred to as "Lhasa station "),before and after the Nepal M_S8. 1 strong earthquake,which occurred on April 25,2015. Based on the observation conditions,the observation system,and the observed data of Lhasa station preliminary discussed,the main characteristics of the abnormal change and evolution process are analyzed and studied,using the following two methods; the "synthesis energy accumulation"and the "power as MSA spectrum"analysis,from the two aspects of the"Time Domain"and"Frequency Domain. "The results show that the abnormal change of the geo-electric field observation of Lhasa station experienced a development stage following the process of "trend change- disturbance change- earthquake period-recovery period",and an evolution process of "low frequency change- high frequency change- smooth change- high frequency change ",before and after the Nepal M_S8. 1strong earthquake. Comprehensive analysis shows that the variation characteristics and evolution process of the geo-electric field at Lhasa station are basically consistent with the results of the relevant mechanism and phenomenon research. So far,this is valuable information with certain objectivity,which is typical and representative to reflect the whole process of the gestation, occurrence and complete development of such strongearthquakes. 展开更多
关键词 Geo-electric field Nepal Ms8. 1 earthquake Lhasa geomagnetic station Abnormal change Synthesis energy accumulation Power as MSA spectrum
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Variation of the Energy Field of Longmenshan Fault Zone before the Wenchuan M_S 8. 0 Earthquake
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作者 Yang Mingzhi Ma Heqing 《Earthquake Research in China》 2012年第3期355-364,共10页
During the process of preparation and occurrence of a large earthquake, the stress-strain state along the fault zone has close relation with the weak seismicity around the fault zone. The seismic energy release near t... During the process of preparation and occurrence of a large earthquake, the stress-strain state along the fault zone has close relation with the weak seismicity around the fault zone. The seismic energy release near the fault zone before an earthquake can better reflect the dynamic process of earthquake preparation. Thus, in this paper, the method of natural orthogonal function expansion has been adopted to discuss the time variation about the energy field of the seismic activity along the Longmenshan fault zone before the Wenchuan MsS. 0 earthquake, 2008. The results show that evident short-term rise changes appeared in the time factors of the typical field corresponding to several key eigenvalues of the energy field along the Longmenshan fault zone before the Wenchuan earthquake, probably being the short-term anomaly message for this earthquake. Through contrastive analysis of earthquake examples such as the 1976 Tangshan earthquake, the authors think that the study of time variation of energy field of seismicity along active fault zone will be helpful for conducting intentional and intensive earthquake monitoring and forecast in active fault regions with high seismic risk based on medium- and long-term earthquake trend judgment. 展开更多
关键词 Longmenshan fault zone energy field Natural orthogonal function expansion Time factor anomaly Wenchuan Ms8. 0 earthquake
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ARCADE 2 Spatial Roar, What Theory of Relation Reveals
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作者 Russell Bagdoo 《Journal of Modern Physics》 2024年第5期690-719,共30页
The theory of Relation provides an explanation for the Arcade 2 excess. It assumes that the isotropic radio emission measured by the Arcade 2 Collaboration, which is 5 - 6 times brighter than the expected contribution... The theory of Relation provides an explanation for the Arcade 2 excess. It assumes that the isotropic radio emission measured by the Arcade 2 Collaboration, which is 5 - 6 times brighter than the expected contributions from known extra-galactic sources, is the residue of an immense primitive energy of ordinary matter released by a relativistic bang almost 100 million years after the big bang, which gave the mass-energy the missing gravity to activate contraction. This relativistic bang, via a Lorentz energy transformation, would have released enormous energy held to be the source of the powerful radio noise detected by the NASA researchers. This transformation would have simultaneously triggered the formation of the first stars from dense gas and the reionization of less dense neutral gas. This departs from the idea that continuous reionization began after the formation of the first stars. We emphasize the importance of primordial magnetic fields, which would have generated significant density fluctuations during recombination and acted as a direct seed for cosmic structures. The first stars and galaxies were bathed in strong magnetic fields that gave rise to the radio microwave din (boom) discovered by Arcade 2. These intense magnetic fields alter the trajectory of charged particles zooming near the speed of light, triggering the space roar and emitting radiation that forms a synchrotron radio background. The theory of Relation offers an alternative to the Lambda-CDM cosmological model, which has become the standard model of the big bang, which leads straight to the vacuum catastrophe. 展开更多
关键词 Arcade 2 Excess Relativistic Bang Theory of relation Lorentz energy Transformation Cosmic Statics Cosmic Boom Synchrotron Radio Background Primordial Magnetic fields
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The seismic energy of Yaoan earthquake sequence estimated by peak velocity 被引量:2
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作者 秦嘉政 钱晓东 +3 位作者 叶建庆 苏有锦 蔡静观 付虹 《Acta Seismologica Sinica(English Edition)》 CSCD 2002年第1期107-112,共6页
关键词 digital seismology seismic energy ambient stress field Yaoan earthquake
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Hypothetical Physics and Chemistry of Volcanic Eruptions: The Doorway to Their Prediction
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作者 Arie Lev Gilat Strachimir Cht Mavrodiev Alexander Vol 《International Journal of Geosciences》 2019年第4期377-404,共28页
This article presents a further development of the hypotheses concerning the possibility of predicting (“tectonic”) earthquakes [1]. Those hypotheses are based on the conversion of all types of released energy into ... This article presents a further development of the hypotheses concerning the possibility of predicting (“tectonic”) earthquakes [1]. Those hypotheses are based on the conversion of all types of released energy into heat and active chemical substances. One of the important sources of this phenomenon is the release of the latent energy trapped and stored during the Earth’s accretion. The latent energy of primordial hydrogen and helium escaping from the Earth’s core and lower mantle causes degassing processes [2] [3]. This latent energy converts into totally different types of chemical, electromagnetic and thermal energies of active compounds that are responsible for the major endogenic terrestrial processes. The dominating theories in seismology and volcanology are that an earthquake results from a sudden slip of a tectonic fault and that only magma and the gases contained in magma supply the volcanic energy resulting in the conclusions that earthquakes and eruptions are unpredictable. Volcanic eruption is considered herein to be a special case of the earthquake-process in which earthquake hypocenters rise to the Earth’s surface. A possible solution is proposed ([1] and herein) based on the analyses of the physicochemical processes as participants in earthquake and eruption preparations (foreshocks - major shock - aftershocks - volcanic eruptions) and on the characteristic rates of reflection of these processes on the Earth’s surface. Influences of Sun-Moon-tides and volcanic (“harmonic”) tremors are analyzed from physical-chemical point of view. The case of the 1980 eruption of Mount St. Helens and the proposed monitoring of the recommended additional data provides a way of selecting a complex of reliable earthquake and volcanic eruption precursors. 展开更多
关键词 earthquakes VOLCANIC ERUPTIONS energy Sources Physical CHEMISTRY Precursors Electromagnetic field Monitoring
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The Electromagnetic Nature of Gravitation and Matter-Antimatter Antigravity. Surmise on Quantum Vacuum Gravitation and Cosmology
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作者 Constantin Meis 《Journal of Modern Physics》 2022年第6期949-968,共20页
We show that the electromagnetic quantum vacuum derives directly from Maxwell’s theory and plays a primary role in quantum electrodynamics, particle physics, gravitation and cosmology. It corresponds to the electroma... We show that the electromagnetic quantum vacuum derives directly from Maxwell’s theory and plays a primary role in quantum electrodynamics, particle physics, gravitation and cosmology. It corresponds to the electromagnetic field ground state at zero frequency, a zero-energy cosmic field permeating all of space and it is composed of real states, called kenons (κενο = vacuum). Photons are local oscillations of kenons guided by a non-local vector potential wave function with quantized amplitude. They propagate at the speed imposed by the vacuum electric permittivity ε<sub>0</sub> and magnetic permeability μ<sub>0</sub>, which are intrinsic properties of the electromagnetic quantum vacuum. The electron-positron elementary charge derives naturally from the electromagnetic quantum vacuum and is related to the photon vector potential. We establish the masse-charge equivalence relation showing that the masses of all particles (leptons, mesons, baryons) and antiparticles are states of the elementary charges and their magnetic moments. The equivalence between Newton’s gravitational law and Coulomb’s electrostatic law results naturally. In addition, we show that the gravitational constant G is expressed explicitly through the electromagnetic quantum vacuum constants putting in evidence the electromagnetic nature of gravity. We draw that G is the same for matter and antimatter but gravitational forces should be repulsive between particles and antiparticles because their masses bear naturally opposite signs. The electromagnetic quantum vacuum appears to be the natural link between quantum electrodynamics, particle physics, gravitation and cosmology and constitutes a basic step towards a unified field theory. Dark Energy and Dark Matter might originate from the electromagnetic quantum vacuum fluctuations. The calculated electromagnetic vacuum energy density, related to the cosmological constant considered responsible for the cosmic acceleration, is in good agreement with the astrophysical observations. The cosmic acceleration may be due to both “quantum vacuum fluctuations” and “matter-antimatter gravitational repelling”. All the above results are established without stating any assumptions or postulates. Next, we advance two hypotheses with cosmological impact. The first is based on the possibility that gravitation is due to the electromagnetic quantum vacuum density of states fluctuations giving rise to a photon pressure at the characteristic collective oscillation frequencies of the charge densities composing the bodies (Electromagnetic Push Gravity). The second advances that energy, matter and antimatter in the universe emerge spontaneously from the quantum vacuum fluctuations as residues that remain stable in space and we present the main principles upon which a new cosmological model may be developed overcoming the well-known Big Bang issues. 展开更多
关键词 Photons Electromagnetic Waves Electromagnetic Quantum Vacuum Dark Light Kenons GRAVITATION Matter-Antimatter Antigravity Electromagnetic Push Gravity Dark energy Cosmological Constant Dark Matter Elementary Charges Mass-Charge relation Cosmology Unified field Theory
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形变、大旱、地磁、静电场等震前异常关联性
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作者 薄万举 张立成 徐东卓 《大地测量与地球动力学》 CSCD 北大核心 2024年第9期881-885,891,共6页
从形变异常机理出发,对大震前出现的几种异常的关联性进行分析,同时结合观测事实和实验进行验证,探索其间可能存在的有机联系。对大震前的大旱、大震后的暴雨、大震时的喷沙冒水和地面塌陷、地声和地光以及大震前的电离层异常、大气静... 从形变异常机理出发,对大震前出现的几种异常的关联性进行分析,同时结合观测事实和实验进行验证,探索其间可能存在的有机联系。对大震前的大旱、大震后的暴雨、大震时的喷沙冒水和地面塌陷、地声和地光以及大震前的电离层异常、大气静电异常、震前及震时电磁波异常等现象从机理上给出统一解释,认为这些异常现象均与大震前震源体附近微裂膨胀体的形成、扩展有关,并随着大震发生而迅速消失。 展开更多
关键词 旱震关系 大气静电场 微裂膨胀体 大震异常 异常机理
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用峰值速度估算姚安地震序列的地震能量 被引量:20
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作者 秦嘉政 钱晓东 +3 位作者 叶建庆 苏有锦 蔡静观 付虹 《地震学报》 CSCD 北大核心 2002年第1期98-102,共5页
关键词 数字地震 地震能量 环境应力场 姚安地震 峰值速度 地震波能量
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汶川8.0级地震前地震活动能量场中短期异常 被引量:15
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作者 罗国富 杨明芝 +1 位作者 马禾青 许晓庆 《地震》 CSCD 北大核心 2011年第3期135-142,共8页
本文应用随机函数理论,将地震释放能量作为地震活动场的基本要素,采用自然正交函数(或称经验正交函数)展开方法,讨论了2008年汶川8.0级地震前区域地震活动能量场的中短期时空异常。结果表明,汶川8.0级地震前震源周围区域能量场的几个主... 本文应用随机函数理论,将地震释放能量作为地震活动场的基本要素,采用自然正交函数(或称经验正交函数)展开方法,讨论了2008年汶川8.0级地震前区域地震活动能量场的中短期时空异常。结果表明,汶川8.0级地震前震源周围区域能量场的几个主要特征值对应的特征向量(典型场)的时间权重因子出现了明显中长期异常变化,这可能是汶川地震中期异常指标;而沿龙门山断裂带能量场的几个区域特征值对应的时间因子出现了显著短期异常变化,这可能是汶川地震短期异常指标。笔者认为该方法是一种值得进一步探讨的地震活动性预测方法。 展开更多
关键词 地震活动能量场 自然正交函数 典型场 汶川8.0级地震
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中小震近场地震动估计中地震动衰减关系的适用性分析 被引量:28
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作者 李小军 阎秀杰 潘华 《地震工程与工程振动》 CSCD 北大核心 2005年第1期1-7,共7页
核工程场地设计基准地震动确定中涉及弥散地震的地震动估计,这导致中小震近场地震动估计成为被关注的研究课题。本文基于一些中小震近场地震动记录资料,分析和探讨了国内外多种地震动衰减关系对中小震近场地震动估计的适用性问题,并结... 核工程场地设计基准地震动确定中涉及弥散地震的地震动估计,这导致中小震近场地震动估计成为被关注的研究课题。本文基于一些中小震近场地震动记录资料,分析和探讨了国内外多种地震动衰减关系对中小震近场地震动估计的适用性问题,并结合我国几个核工程地震问题研究工作的实践对中小震近场地震动衰减关系确定的思路和原则提出了建议。 展开更多
关键词 弥散地震 近场地震动 衰减关系 核工程
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地震视应力在中国大陆西部强震趋势预测中的应用 被引量:16
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作者 易志刚 宋茉 +1 位作者 杨选辉 张彬 《地震》 CSCD 北大核心 2007年第4期110-120,共11页
以中国大陆西部(20^o~50^oN,73^o~105^oE)为例,以中国地震台网中心月报目录为基础,参照美国哈佛大学(CMT)逐个筛选出1990年1月1日至2005年12月31日中国大陆191个地震作为样本,对用哈佛大学提供的地震矩和震级能量公式计算的... 以中国大陆西部(20^o~50^oN,73^o~105^oE)为例,以中国地震台网中心月报目录为基础,参照美国哈佛大学(CMT)逐个筛选出1990年1月1日至2005年12月31日中国大陆191个地震作为样本,对用哈佛大学提供的地震矩和震级能量公式计算的视应力值σapp1与完全由震级经验公式估算出的地震矩和地震辐射能量计算出的视应力值σapp2。进行了对比分析。在此基础上,通过对1970年以来中国大陆7级以上强震的震例总结,对地震视应力异常区与强震发生地区的关系进行了研究。并结合钻孔应力、应变学科在年度预测中对中国大陆西部强震发生地区的预测情况进行了尺值评分。结果表明:①当震级上限固定时,σapp1与σapp2的差值序列之方差,表现出随着震级下限增大而增大的特征。在3.5≤Ms≤6.0区间内,以圳与σapp2拟合程度较好。②地震视应力异常区的变化与迁移可能是构造大区应力、应变场中显著应力变化区的变化与迁移的反映,具有图像直观、量化、预测区间有限等优点,可用于强震发生地区的预测,尺值约为0.35。并对强震发生地区趋势预测的总体思路进行了有意义的讨论。 展开更多
关键词 视应力 地震场 地震辐射能量 中国大陆
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几次大地震前后地电场中长期变化分析与研究 被引量:8
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作者 席继楼 关华平 +3 位作者 刘超 庄楠 武建华 颜晓晔 《地震》 CSCD 北大核心 2018年第2期117-126,共10页
地电场是地球表面天然存在的电场,包括大地电场和自然电场。利用"合成能量累加"方法,分析处理了甘肃省、青海省、四川省、重庆市所辖部分台站2007年7月至2017年12月的地电场观测数据,研究和讨论了汶川8.0级地震等几次大地震... 地电场是地球表面天然存在的电场,包括大地电场和自然电场。利用"合成能量累加"方法,分析处理了甘肃省、青海省、四川省、重庆市所辖部分台站2007年7月至2017年12月的地电场观测数据,研究和讨论了汶川8.0级地震等几次大地震前后地电场中长期异常变化特征。研究结果显示,几次MS7.0以上大地震前后,均出现了地电场区域性准同步异常变化;地电场异常变化经历了"震前—发震—震后"三个阶段,震前和震后变化比较明显,发震期变化相对平稳,时间跨度达12个月以上;地电场异常变化主要沿构造带分布,变化强度随震中距的增加而减小。 展开更多
关键词 汶川MS8.0地震 地电场观测 数据分析 合成能量累加 地电场中长期变化
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2014年云南景谷6.6级地震前后活动能量场分析 被引量:6
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作者 罗国富 屠泓为 +2 位作者 曾宪伟 马禾青 杨明芝 《地震》 CSCD 北大核心 2016年第3期125-134,共10页
本文将地震释放能量作为地震活动场的基本要素,采用自然正交函数展开方法,系统研究2014年景谷6.6级地震震中区域地震活动能量场的时空特征。结果表明,景谷6.6级地震前能量场的前4个主要特征值对应的典型能量场时间因子都出现明显上升变... 本文将地震释放能量作为地震活动场的基本要素,采用自然正交函数展开方法,系统研究2014年景谷6.6级地震震中区域地震活动能量场的时空特征。结果表明,景谷6.6级地震前能量场的前4个主要特征值对应的典型能量场时间因子都出现明显上升变或下降异常,空间等值线形成局部能量高值异常危险区,可能是景谷6.6级地震空间异常的中短期特征。我们还进一步研究了景谷6.6级地震前后空间异常随时间的演变,给出了异常发展变化模式,最后应用研究地震资料的累积次数从物理角度解释异常形成的机制。 展开更多
关键词 能量场 随机函数 时空异常危险区 2014景谷6.6级地震
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2015年尼泊尔8.1级地震前后拉萨地电场观测数据变化分析 被引量:14
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作者 席继楼 关华平 +6 位作者 刘超 庄楠 杨晓明 张治国 次卓嘎 格桑卓玛 马爱明 《地震》 CSCD 北大核心 2016年第2期1-13,共13页
2015年4月25日尼泊尔8.1级强烈地震前后,拉萨地磁台(以下简称"拉萨台")地电场观测数据出现了长时间、大幅度异常变化。在对拉萨台地电场观测条件、观测系统以及观测结果进行初步讨论的基础上,利用"能量合成累加"和&... 2015年4月25日尼泊尔8.1级强烈地震前后,拉萨地磁台(以下简称"拉萨台")地电场观测数据出现了长时间、大幅度异常变化。在对拉萨台地电场观测条件、观测系统以及观测结果进行初步讨论的基础上,利用"能量合成累加"和"MSA功率谱分析"等数据处理方法,从"时间域"和"频率域"两个方面,对该异常变化的主要特征和演化过程进行了分析。结果显示,尼泊尔8.1级地震前后,拉萨台的地电场观测数据异常变化,经历了"趋势变化-扰动变化-发震期-恢复期"等发展阶段,以及"低频变化-高频变化-平稳变化-高频变化"等演化过程。综合分析认为,拉萨台地电场观测异常变化特征和演化过程,与相关现象和机理研究结果基本吻合,能够完整反映强烈地震孕育、发生和发展全过程,是具有一定客观性、典型性和代表性的珍贵资料。 展开更多
关键词 地电场变化 尼泊尔8.1级地震 拉萨地磁台 能量合成累加 MSA功率谱
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基于小波包分析的OLR地震异常信息提取初探 被引量:8
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作者 戴勇 丁风和 韩晓明 《地震》 CSCD 北大核心 2009年第3期61-66,共6页
长波辐射OLR具有可覆盖范围大的特点。本文提取其与地震相关的异常信息,并尝试将所得结果应用于地震预测中,这对于弥补我国部分处于前兆台网监测范围之外地区具有重要意义。文中首先对小波包方法及其原理进行了简要介绍,在此基础上,尝... 长波辐射OLR具有可覆盖范围大的特点。本文提取其与地震相关的异常信息,并尝试将所得结果应用于地震预测中,这对于弥补我国部分处于前兆台网监测范围之外地区具有重要意义。文中首先对小波包方法及其原理进行了简要介绍,在此基础上,尝试采用该方法对长波辐射值OLR时间序列进行分解重构,提取异常信息。通过对15个不同震例的研究表明,地震前的10个月内,重构信号均出现能量严重衰减的现象,且其持续时间长短与发震震级之间存在一定相关性。 展开更多
关键词 长波辐射值(OLR) 小波包法 能量衰减 地震异常
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宁夏及邻近地区地震活动能量场的统计分析 被引量:30
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作者 杨明芝 赵卫明 《地震学报》 CSCD 北大核心 2004年第5期516-522,共7页
应用随机函数理论 ,将区域地震活动能量看作是空间和时间的随机函数 ,采用自然正交函数展开的分析方法 ,对宁夏及邻近地区小地震活动场的特征进行了研究 .重点分析了场的主要部分 ,即前几个典型场的时间“权重”系数的时间变化 ,发现它... 应用随机函数理论 ,将区域地震活动能量看作是空间和时间的随机函数 ,采用自然正交函数展开的分析方法 ,对宁夏及邻近地区小地震活动场的特征进行了研究 .重点分析了场的主要部分 ,即前几个典型场的时间“权重”系数的时间变化 ,发现它们在中强地震发生前数值有较大幅度的升、降变化 ,显示出了与区域及其周围中强地震相关的变化特性 .从宁夏地区的震例看 ,地震能量随机场的自然正交函数展开方法是一种值得探索的地震分析预测方法 . 展开更多
关键词 地震能量场 自然正交展开 预测方法
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电子陶瓷最新研究动向和开发趋势 被引量:6
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作者 胡海泉 鄢春根 +1 位作者 刘春福 王裕芳 《中国陶瓷》 CAS CSCD 2003年第5期34-37,54,共5页
电子陶瓷近十年来取得了引人注目的重大进展,世界各先进工业国纷纷投入大量人力和资金进行电子陶瓷的最新研究和开发,竞争十分激烈。电子陶瓷在几大领域正在取得新突破,情报通讯相关材料和元件向微小化、高功能化发展,环境相关材料以开... 电子陶瓷近十年来取得了引人注目的重大进展,世界各先进工业国纷纷投入大量人力和资金进行电子陶瓷的最新研究和开发,竞争十分激烈。电子陶瓷在几大领域正在取得新突破,情报通讯相关材料和元件向微小化、高功能化发展,环境相关材料以开发非铅系压电材料为主流,能源相关领域以最新型的再生(二次)电池和燃料电池为开发趋势,更引人注目的是热电变换元件的研究和开发最具有极大的社会和经济效益潜力,可望带来新世纪的技术和产业革新。本文较系统地介绍了国内外电子陶瓷最新研究动向和开发趋势,为赶超世界先进水平提供动向资料。 展开更多
关键词 电子陶瓷 研究动向 开发 情报通讯 环境相关材料 能源相关领域
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