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precursor
相关语句
  前兆
    ANIMAL ABNORMAL BEHAVIOR IS AN EARTHQUAKE SHORT-TERM PRECURSOR
    动物的行为异常是一种临震前兆
短句来源
    OBSERVATION AND ANALYSIS OF THE STRESS WAVE FOR A SHORT TERM AND IMMEDIATE EARTHQUAKE PRECURSOR
    地震短期、临震前兆应力波的观测与分析
短句来源
    STUDY ON PRE-SLIP PRECURSOR OF THE EARTHQUAKE——LONG PERIOD PRECURSORY SEISMIC WAVE
    预滑与地震前兆——长周期波动研究
短句来源
    APPLICATION OF COMPUTER TO THE PRECURSOR OBSERVATION OF EARTHQUAKE
    计算机在地震前兆观测中的应用
短句来源
    AN ANALYSIS ON EARTHQUAKE PRECURSOR OF F" IN GROUND WATER
    地下水中氟离子地震前兆效应分析
短句来源
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  “precursor”译为未确定词的双语例句
    MOMENTARY FLOW MECHANISM OF SHORT TERM EARTHQUAKE PRECURSOR
    用地下流体震前瞬间流动机制解释大地震短临前兆的特征
短句来源
    THE APPLICATION OF D FUNCTION TO EXTRACTING SEISMIC PRECURSOR INFORMATION OF HYDROGEO-CHEMISTRY
    D函数在水文地球化学震兆信息提取上的应用
短句来源
    PRECURSOR STRAIN ANOMALIES OBSERVED BY THE RZB-1 TYPE OF BOREHOLE STAINMETER BEFORE THE WUSHI Ms6.4 EARTHQUAKE
    RZB-1型压容式钻孔变形计在乌什6.4级地震前观测到的应变异常
短句来源
    METEOROLOGICAL PRECURSOR BEFORE THE FANJIATUN EARTHQUAKE ( Ms=5.2 ) IN HUAIDE COUNTY, 1966
    1966年怀德县范家屯5.2级地震的气象征兆
短句来源
    Analysis for Monitoring Efficiency on Short-impending Precursor Informations from Groundwater Dynamic Remote Metering Network of Taiyuan
    太原市地下水动态遥测网短临信息监测效能的分析
短句来源
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  precursor
The overall process involves three steps: preparation of insoluble carboxyl-containing grafted starch copolymer (ISC), formation of precursor (ISC-Co), decomposition of ISC-Co, and phase transition of Co3O4 nanoparticles.
      
The precursor was proved to be [Zn5(OH)6(CO3)2] by TG-DTG-DTA and IR analysis.
      
This precursor was calcined at 300°C for 1, 2 and 3 hours respectively, and then the nanocrystalline ZnO of different grain size were obtained.
      
Steam produced during the decomposition process accelerated the sintering of MgO, and MgO with surface area as high as 412 m2 · g-1 was obtained through calcining its precursor in flowing dry nitrogen at 520°C for 4 h.
      
ZrWMoO8 powders with different morphologies were obtained using ammonium tungstate, molybdate tungstate and zirconium tungstate as the starting materials by dehydrating the precursor ZrWMoO7(OH)2(H2O)2.
      
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In order to seek for the earthquake precursors, the characteristic variations of microseisms preceding several larger earthquake occurrences are analysed in brief. It is found that amplitude of microseism decreased abnormally at a station near the epicenter (Δ≈20km) about a few days before the occurrence of the Haicheng (海城) earthquake (M=7.3) on February 4, 1975. Preliminary analysis shows also that the phenomena such as the variation of the direction of approach of microseisms and the correlation between...

In order to seek for the earthquake precursors, the characteristic variations of microseisms preceding several larger earthquake occurrences are analysed in brief. It is found that amplitude of microseism decreased abnormally at a station near the epicenter (Δ≈20km) about a few days before the occurrence of the Haicheng (海城) earthquake (M=7.3) on February 4, 1975. Preliminary analysis shows also that the phenomena such as the variation of the direction of approach of microseisms and the correlation between different components of the microseisms before large earthquakes are worthy of note.

为探索地震的前兆,对一些较大地震前地脉动特征的变化作了简要的分析,发现1975年2月4日的海城7.3级地震前数天,近震中的地震台上(△≈20公里),脉动振幅异常减小;初步分析还表明,大震发生前,脉动方向以及脉动各分量相关系数的变化等现象也是值得引起注意的。

In order to study the variation of Radon content as an earthquake precursor, a model experiment was performed on the relation between the rock rupture and variation of Radon content. Results of the experiment show that rock rupture may be considered as one of the causes of variation of Radon content before the occurrence of an earthquake. Finally, a preliminary discussion on some questions arising from actual observations in earthquake areas on the basis of the results of the experiment was made.

为探索氡含量的变化能否视作地震前兆,作者进行了岩石破裂与氡含量变化关系的模拟实验。实验结果表明,可以认为岩石破裂是引起地震之前氡含量异常的原因之一。文末,根据实验结果对在地震区某些实际观测中的问题进行了初步讨论。

In this paper, earthquake source development of tectonic earthquakes has been discussed in more detail. Taking into consideration of the effect of the dynamic friction and through further analysis of the process of the earthquake source and the variations of different physical parameters, the dilatancy-creep model of the earthquake source development was proposed. With this model, the process may consist of six stages: (1) elastic deformation; (2) non-elastic deformation (dilatancy) ; (3) precursory creep (partial...

In this paper, earthquake source development of tectonic earthquakes has been discussed in more detail. Taking into consideration of the effect of the dynamic friction and through further analysis of the process of the earthquake source and the variations of different physical parameters, the dilatancy-creep model of the earthquake source development was proposed. With this model, the process may consist of six stages: (1) elastic deformation; (2) non-elastic deformation (dilatancy) ; (3) precursory creep (partial fracturing on the fault plane) ; (4) accelerated creep (short term and imminent) ; (5) total dislocation (complete fracturing of the fault)-occurrence of the earthquake; (6) adjustments after the earthquake. Then, two different types of precursory phenomena, namely creep fracture and collapsing fracture, as well as the questions like the variation of the velocity of non-elastic deformation (dilatancy), the basic features of various precursors, the physical basis of short term and imminent earthquake precursors and others have also been discussed.The results of this study possibly show that the dilatancy-creep model may serve as a physical and mechanical basis in discerning the nature of earthquake precursors and to make earthquake predictions.

较详细地讨论了构造地震的震源孕育情况;在考虑了动摩擦效应后,进一步对震源孕育过程和各种物理量的变化规律进行了分析和计算,提出了震源孕育的膨张一蠕动模式.该模式将孕震过程划分为:弹性变形、非弹性变形(膨胀)、前兆蠕动(断层面局部破裂)、加速蠕动(短期和临震)、整体错动(断层面全部破裂)——发震、震后调整等六个阶段.最后讨论了两类不同前兆、蠕裂和崩裂、非弹性变形(膨胀)速度的变化、各种前兆异常的基本形态、短临前兆的物理基础等问题.研究结果表明,膨胀—蠕动模式可能是认识地震前兆现象本质和发展预报技术的一个物理和力学基础.

 
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