Results 11 to 20 of about 2,705 (166)
Dizhen xuebao, 2021 当地电场和地电阻率同场地观测时，地电场观测会受到地电阻率观测的供电干扰，这类干扰时间短、干扰形态和出现时间固定，影响了地电场观测数据的正常变化形态，给数据分析和地震科学研究造成困难。为解决这一干扰问题，本文在比较分形插值方法与传统插值方法优劣的基础上，采用分形插值方法对受干扰的地电场观测数据进行重建，以提高信号重建的精度。结果表明，采用该方法重建的数据是对原数据很好的近似，可有效地恢复观测数据信息，保持观测数据原有的变化趋势。
Lanwei Wang +3 more
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Forecasting earthquakes, [PDF]
Geophysical Journal International, 1946 Abstract It was twelve minutes after five in San Francisco on the fateful morning of April 18, 1906. Most of the city's inhabitants were still in bed when the earthquake struck and the Great San Francisco Fire was started. Why was the public not warned of the coming catastrophe?
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AIP Advances, 2019 Non-hydrostatic stresses have a unique influence on materials. To understand the effect of non-hydrostatic stress on NaCl, one of the most widely used pressure calibrant in high-pressure experiments, the lattice constants, density, elastic modulus, Young’
Lei Liu, Longxing Yang, Li Yi, Hong Liu
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Sea temperature variation associated with the 2021 Haiti Mw 7.2 earthquake and possible mechanism
Geomatics, Natural Hazards & Risk, 2022 A catastrophic earthquake (magnitude Mw 7.2) occurred on 14 August 2021 in Haiti. Sea surface temperature (SST) and sea potential temperature (SPT) observed from satellites show pronounced changes prior to the main earthquake event.
Lu Zhang, Meng Jiang, Feng Jing
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Dizhen xuebao, 2019 为了研究吉兰泰断陷盆地周缘断裂带气体排放及其对断层活动性的指示意义，在盆地周缘4条活动断裂上布设了5条土壤气测量剖面和1条电磁测量剖面，观测了土壤气中Rn，Hg和CO2的浓度、释放通量和地电阻率，对各测量剖面进行了土壤化学组分分析，计算得到了断层活动性相对指数KQ。研究结果显示：土壤气体CO2和Rn受渗透性较低的粉砂土阻挡，主要沿结构破碎的断层上盘逃逸，并形成浓度高峰；吉兰泰盆地南缘土壤气Rn，Hg和CO2的浓度和释放通量最高，可能与盆地西南缘花岗岩中U和Ra的运移以及盆地南缘碳酸盐岩的分解有一定的关系。
Zhaofei Liu +6 more
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Earthquake Forecasting and Earthquake Preparedness [PDF]
International Journal of Earth & Environmental Sciences, 2016 Earthquake prediction is usually dealt with in one of two ways: the prediction of the effects of a postulated earthquake on a specific site or the prediction of the occurrence of events. The first approach is today well developed and should always be instrumental for the design and implementation of construction codes and for general planning.
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Crystal structure and elasticity of Al-bearing phase H under high pressure
AIP Advances, 2018 Al has significant effect on properties of minerals. We reported crystal structure and elasticity of phase H, an important potential water reservoir in the mantle, which contains different Al using first principles simulations for understanding the ...
Guiping Liu +8 more
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Dizhen xuebao, 2023 在对地铁杂散电流产生机理的讨论的基础上，定量计算了地铁运行时杂散电流在地电阻率观测中所呈现的影响幅度，结果表明地铁杂散电流传播范围可以达到几十甚至上百千米。通过对城市周边的北京通州、天津青光、宝坻、塘沽、江苏江宁和辽宁新城子等六个地电阻率观测台站观测到的该类信号的研究，分析了其幅值、主要频率范围以及空间分布特征，结果表明该类信号的幅值从几mV至几十mV不等，与源距关系密切，周期主要集中在50—200 s范围内，在分析地震异常前兆信号时该类信号可使信噪比降低10—30 dB左右 ...
Lanwei Wang +3 more
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THE EXTRACTION OF POST-EARTHQUAKE BUILDING DAMAGE INFORMATIOM BASED ON CONVOLUTIONAL NEURAL NETWORK [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 The seismic damage information of buildings extracted from remote sensing (RS) imagery is meaningful for supporting relief and effective reduction of losses caused by earthquake.
M. Chen, X. Wang, A. Dou, X. Wu
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