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risk region     
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  危险区
     CHARACTERISTICS OF EARLY BACKGROUND SEISMICITY AND PREDICTIVE OF STRONG EARTHQUAKE RISK REGION WITH Ms≥7. 0
     华北地区早期背景地震活动特征与M≥7级大震危险区预测
短句来源
     Based on the field investigation and collected data,the fundamental characteristics and the conditions produced landslide in Gujiao were analyzed,the classification for the landslide of Gujiao was made,and the risk region of landslide of the city was predicted by the comprehensive evaluation method of multi factor fuzzy mathematics.
     根据野外调查和收集到的资料,研究了山西省古交市滑坡的基本特征和形成条件,对古交市滑坡进行了分类,并在本区使用多因素模糊数学综合评判的方法预测了滑坡危险区
短句来源
     An effective approach for imminent tracing of seismic risk region ——Application of CO_2 observation in Xinjiang area
     地震危险区短临跟踪的一种有效观测手段——地下岩土气体CO_2观测在新疆地区的应用
短句来源
     The belt which a series of faulted basins are main body is the seismotectonic belt and the main risk region of the future earthquakes in Shanxi.
     以一系列断陷盆地为主体的断陷盆地带是山西的地震构造带和未来地震的主要危险区
短句来源
     Study on Vertical Crustal Deformation Rate Gradient, Fault Deformation Rate Variation and Strong Earthquake Risk Region
     地壳垂直形变速率梯度、断层形变速率变化与强震危险区研究
短句来源
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  地震危险区
     An effective approach for imminent tracing of seismic risk region ——Application of CO_2 observation in Xinjiang area
     地震危险区短临跟踪的一种有效观测手段——地下岩土气体CO_2观测在新疆地区的应用
短句来源
     EXPLORATION FOR SEISMIC RISK REGION
     对地震危险区的探索——以南黄海5.3级地震等预报为例
短句来源
     EARTHQUAKE HAZARD PREDICTION FOR SEISMIC RISK REGION OF MINGLE BASIN
     民乐盆地地震危险区震害预测
短句来源
     THE DYNAMIC PATIERN SCANNING FOR THE SEISMIC TRIGGERING RESPONSE COEFFICIENT AND THE PREDICTION OF SEISMIC RISK REGION IN NOTH CHINA
     地震触发响应系数动态图象扫描及华北近期地震危险区预测
短句来源
     Prediction to the risk region of earthquake in north China through zoning analysis
     通过分区分析预测华北地震危险区
短句来源
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  风险区
     6.71% the western land areas in the high risk region;
     高风险区的县 (市 )占西部国土面积的 6 71%。
短句来源
     The research shows that the counties (cities) account for 0.28% the total areas of the western region in the extremely high risk region;
     研究表明 :极高风险区的县 (市 )占西部地区总面积的0 2 8%。
短句来源
     Based on analysis of the meaning and characteristics of land use complex system of high risk region, the indicator system for evaluating sustainable land use in the region with high risk of the flood and waterlogging in the Dongting Lake was constructed.
     在对洞庭湖洪涝高风险区土地利用复合系统的内涵及特征分析的基础上,建立了洞庭湖洪涝高风险区土地可持续利用评价指标体系。
短句来源
     the moderate risk region included the middle of S
     低风险区在陕西中南部、河南中北部、北京市、天津市、河北中南部和山东省。
短句来源
     After that, every risk region's natural disaster insurance risk degree is figured out by the improved mathematics model and China's natural disaster insurance risk regionalization map is drawn.
     再利用改进后的数学模型计算出各风险区的自然灾害保险风险度,并绘制了中国自然灾害保险风险区划图;
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  危险地区
     Three places where shocks of M 4.0 occured from1976 to 1985 have been recognized as earthquake risk region.
     自1976至1985年中发生了M≥4.0地震的3个地区均被识别为危险地区.
短句来源

 

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      risk region
    These effects were not due to differences in collateral flow, risk region size or hemodynamic variables between the groups.
          
    In a control group the infarct size (necrotic volume/risk region volume × 100) was 15.8 ± 1.5%.
          
    Infarct size was determined as the ratio of infarcted myocardium (tetrazolium stain) to the risk region (dye technique).
          
    The anatomic risk region was determined antemortem by Evan's blue staining while the infarct zone was delineated postmortem by tetrazoleum staining.
          
    The infarct size (% of risk region) was significantly greater in hypercholesterolemic rabbits than in controls (39±6 vs.
          
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    In order to determine the earthquake risk region, the relationship between the gravitational high and earthquakes occurring nearby is statistically studied by using the gravity data of the North China Plain area. The statistical results obtained indicate that the gravitational high must satisfy certain conditions in case of occurrence of an earthquake of magnitude Ms≥4 near the anomaly area. It is found that the greatest magnitude and total seismic energy released are highly correlated to the product of...

    In order to determine the earthquake risk region, the relationship between the gravitational high and earthquakes occurring nearby is statistically studied by using the gravity data of the North China Plain area. The statistical results obtained indicate that the gravitational high must satisfy certain conditions in case of occurrence of an earthquake of magnitude Ms≥4 near the anomaly area. It is found that the greatest magnitude and total seismic energy released are highly correlated to the product of the gravitational high area with the square root of its intensity. Most of earthquakes of magnitude Ms≥5 took place near the position with greater form-vectors of gravitational high.According to the statistical results we can evaluate earthquake risk regions in the North China Plain area and indicate the conditions for applying these results. Furthermore, the physical implications of statistical parameters of gravitational high are also discussed herein.

    本文利用华北平原重力资料,统计了重力高特征参数与发生在重力高附近的地震之间的关系。统计结果发现:重力高附近如有M_s≥4级地震发生,它应满足一定的特征条件;最大震级和地震总能量与重力高面积和强度的平方根之积有高度相关性;M_s≥5级地震绝大多数发生在较大的重力高形态矢量附近。根据统计结果预测了本区地震危险区,指出了统计结果的应用条件和物理含义。

    On the basis of data from the field invesigation alongwith geophysical exploration and focal mechanism solutions, the authors have illustrated the tectonic framework of the crust and the characteristics of the tectonic stress field that had remained in the northern part of recent Henan area since Late Tertiary.A model has been developed for this crust segment that has been in a process of being deformed and the model has been put to test in many a way.The potential risk regions have been discussed for...

    On the basis of data from the field invesigation alongwith geophysical exploration and focal mechanism solutions, the authors have illustrated the tectonic framework of the crust and the characteristics of the tectonic stress field that had remained in the northern part of recent Henan area since Late Tertiary.A model has been developed for this crust segment that has been in a process of being deformed and the model has been put to test in many a way.The potential risk regions have been discussed for moderate and strong shocks.

    豫北地区近几年来一直被定为全国重点监视区之一,但中强地震可能发生在哪里?这是大家所关心的问题。作者根据野外实地调查,并结合前人的地质,石油、煤田勘探,地壳测深等资料,提出了该区的主要构造格架及其新活动特征,晚第三纪以来区域构造应力场,并由此推论了应力的集中部位,同时以大自然的各种客观现象为佐证,检验了这一推论的可靠性,探讨了中强地震可能发生的地区。

    In a given time interval from an initial value to time t, the accumulated strain releases in a large region controlled by a unified tectonic stress field are defined byj being the sum of earthquakes in the whole region.In the same time interval, the accumulated strain release of the kth preparing earthquake district within the region is:Where mk is the sum of earthquakes in the kth district.It is assumed that c is a constant for the large region controlled by unified tectonic stress field. Ei and Ei denote the...

    In a given time interval from an initial value to time t, the accumulated strain releases in a large region controlled by a unified tectonic stress field are defined byj being the sum of earthquakes in the whole region.In the same time interval, the accumulated strain release of the kth preparing earthquake district within the region is:Where mk is the sum of earthquakes in the kth district.It is assumed that c is a constant for the large region controlled by unified tectonic stress field. Ei and Ei denote the corresponding energies of seismic waves. We defineand Pk is the strain ratio for the kth district in the large region just before the time t.the. stresses must be readjusted after a strong shock, so that it leads the change of the stress system in a large region. We expect to obtain a quantity showing the characteristics of this adjustment and variation under the restraint of unified tectonic stress field. Investigating seismic activity of M≥5.0 in Sichuan and Yunnan provinces since 1500, the process can be expressed approximately by relative strain quantities Pk ( = 1, 2,…, 9). Since 1917, the large earthquake occurred in the nine preparatory earthquake districts, which corre- sponds to the area of Pk ≤0.08. They are not found in area of Pk>0.08 This meas that the period of Pk>0.08 will be in safety to every preparatory districts. On the contrary, the period of Pk<0.08 will be danger. Thus, this would be a reference criterion of earthquake risk region in Sichuan and Yunnan provinces.

    设以某个时间为起点至 t 时刻前的给定时段里,受统一构造应力场控制的大范围内的累积应变释放量为ε_0=1/C(?),j 是全区地震总个数。在同一给定时段里,该范围内的第 K 个孕震区的累积应变释放量为(?),m_k 是第 K 区地震总个数。其中,假定受统一构造应力场控制的大范围内,C 为常数;Ei 和 El 为相应的地震波能量。定义(?)为第 K 区在 t 时刻前夕的相对应变量。一次大震发生后,应力要重新调整,这必将引起一个地区应力系统的改变。我们希望有一个量来表明:在统一构造应力场控制下,这种调整、变化的特点。研究川滇地区1500年以来,M≥5.0级的地震活动表明,这一过程可以用相对应变量 P_k(k=1,2,…,9)来近似表达。自1917年以来,9个孕震区的共10次大震都发生在 P_k≤0.08的区里,而不发生在>0.08的区;对每个孕震区,P_k>0.08的期间是安全期,反之为危险期。这可作为川滇地震危险区的一个参考判据。

     
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