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precursor
相关语句
  前兆
    DESIGNING AND MANUFACTURING OF SEISMIC MONITORING SYSTEM OF COMPREHENSIVE PRECURSOR DATABASE
    综合前兆数据库震情监视处理系统的设计与研制
短句来源
    MULIPLE-OBJECTIVE DECISION OF EARTHQUAKE PRECURSOR INFORMATION SYSTEM
    地震前兆信息系统的多目标决策
短句来源
    ON THE FAULT-GAS PRECURSOR OF THE SOUTH JIAYUGUAN M5.4 EARTHQUAKE
    嘉峪关南5.4级地震的断层气体前兆研究
短句来源
    Dynamic Analysis for Partial Precursor Data of Datong-Yanggao M6.1 Earthquake
    大同—阳高6.1级地震部分前兆资料的动态分析
短句来源
    STUDY ON NEW METHOD OF PREDICTING EARTHQUAKE WITH GEOTHERMAL PRECURSOR
    地热前兆预报地震的新方法研究
短句来源
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  “precursor”译为未确定词的双语例句
    OBSERVATIONALSTUDY OF SEISMIC ELECTROMAGNETIC WAVE PRECURSOR IN SHENYANG AREA
    沈阳地区地震电磁波前兆的观测研究
短句来源
    Precursor Information in Frequency Variation before Strong Earthquake of Guangxi Province History
    广西历史强震前地震频度变化的震兆信息
短句来源
    On the physical model of earthquake precursor fields and the mechanism of precursors'timespace distribution──origin and evidences of the strong body earthquake──generating model
    On the physical model of earthquake precursor fields and the mechanism of precursors'timespace distribution──origin and evidences of the strong body earthquake──generating model
短句来源
    STUDY ON THE PRECURSOR ANOMALY AND SHORT-IMPENDING PREDICTION OF JINGGU EARTHQUAKE 5. 2 ON SEPT. 19, 1994
    1994年9月19日景谷5.2级地震的震兆异常与短临预报
短句来源
    On the physical model of earthquake precursor fields and the mechanism of precursors'timespace distribution (Ⅲ )──anomalies of seismicity and crustal deformation and their mechanisms when a strong earthquake is in preparation
    On the physical model of earthquake precursor fields and the mechanism of precursors'timespace distribution(Ⅲ)──anomalies of seismicity and crustal deformation and their mechanisms when a strong earthquake is in prep
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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During the preparatory periods of the Haicheng earthquake and Tangshah earthquake, the occurrences of the stronger earthquakes in the precursory field were related to the moon's phase, the M_L≥4.5 earthquakes of the near-focus field in the trend precursory periods and the M_L≥4.0 earthquakes of the whole precursory field in the periods of the fast-changing precursors tended to occur around syzygy or quarter. The similar relationships existed for the main series of Haicheng earthquake and Tangshan earthquake,...

During the preparatory periods of the Haicheng earthquake and Tangshah earthquake, the occurrences of the stronger earthquakes in the precursory field were related to the moon's phase, the M_L≥4.5 earthquakes of the near-focus field in the trend precursory periods and the M_L≥4.0 earthquakes of the whole precursory field in the periods of the fast-changing precursors tended to occur around syzygy or quarter. The similar relationships existed for the main series of Haicheng earthquake and Tangshan earthquake, and for the M_L≥6 earthquakes in the precursory field since 1900. These relations may be used in earthquake prediction. A preliminary discussion of the triggering mechanism was proposed in this paper.

海城和唐山地震的孕震期间,前兆异常区域内的较强地震趋于发生在朔望和上下弦,海城和唐山地震的主序列以及前兆异常区域内1900年以来发生的六级以上强震与月相也存在类似的相关。这些关系可以在地震预报中作参考。本文还对触发机制作了初步的探讨。

In this paper the complexity of the short-term and impending earthquake precursors is studied with the anisotropic and quasi-elastic medium model and the source-composite model by using the finite-element numerical simulation. The result shows that the exhibitory degree depends on the closed degree of the observational site to the seismogenic structure. The closer the distance between the observational site and seismogenic structure, the more obvious the anomaly is. For the temporal distribution, the anomaly...

In this paper the complexity of the short-term and impending earthquake precursors is studied with the anisotropic and quasi-elastic medium model and the source-composite model by using the finite-element numerical simulation. The result shows that the exhibitory degree depends on the closed degree of the observational site to the seismogenic structure. The closer the distance between the observational site and seismogenic structure, the more obvious the anomaly is. For the temporal distribution, the anomaly initially indicated the feature of anomaly propagation from the out-ring to the epicenter. In addition, the observations of the multiple techniques (multiple physical quantities) at same site often show obvious difference of the anomaly exhibition due to that the multiple physical quantities depend on the different variable factors during the seismogenic process.

本文选用各向异性的准弹性介质模型和震源组合模型,应用有限元数值模拟方法,研究了短临阶段地震前兆的复杂性。给出:临震异常的显现程度取决于观测点距发震构造的贴近程度。观测点越接近发震构造,异常越明显。在时间分布上,异常先在外围出现后在震中区出现,呈现为异常从外围向震中传播的特征。此外,对于在同一观测点上的多手段(多种物理量)观测,由于不同物理量各自依赖于孕震过程中不同的变化因子,因此,同一观测点上的不同物理量监测,其异常显示的情况往往也有明显的差异。

The earthquake precursors are related to various physical and chemical observational techniques,and their metric units are also different. Therefore, the direct quantitative comparation among various precursory anomalies is impossible, which brings difficulty to establish the index system of comprehensive earthquake prediction. Aimed at this technical difficulty,the authors proposed a non-dimensional value (anomaly subordinate level μ), which normalized different property and metric units of precursory;...

The earthquake precursors are related to various physical and chemical observational techniques,and their metric units are also different. Therefore, the direct quantitative comparation among various precursory anomalies is impossible, which brings difficulty to establish the index system of comprehensive earthquake prediction. Aimed at this technical difficulty,the authors proposed a non-dimensional value (anomaly subordinate level μ), which normalized different property and metric units of precursory; thus to establish the comprehensive prediction index of the short-term and impending earthquake precursors as well as give the quantitative describtion of capacity to reflect earthquakes of various earthquake precursors.

地震前兆涉及到众多物理的和化学的观测方法,且计量单位也各不相同,因此,在各类前兆异常之间无法进行直接的定量对比,从而给地震综合预报标志体系的建立带来了困难。针对这一技术难题,本文提出了对各类前兆观测项目都适用的一个无量纲值(异常从属函数值μ)来统一归划不同性质、不同计量单位的地震前兆异常,并由此建立起具有重现性的地震前兆短临综合预报指标,还给出了各类地震前兆映震能力的定量描述。

 
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