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京西北
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  northwest beijing
     Through calculation we get the following results:the mean propagation velocity of direct wave in northwest Beijing area is Vps =5.99Km/s, Vsg =3.47Km/s,mean Vpg/Vsg =1.73,the crustal depth of the region is 41km.
     通过计算 ,得到京西北地区直达波的平均传播速度为 :Vpg=5.99km/s,Vsg=3.47km/s,平均波速比 Vpg/Vsg=1 .73,京西北地区的地壳厚度为 41 Km。
短句来源
     THE SURVEY FOR WAVE VELOCITY OF NEAR EARTHQUAKES AND MEAN VP/VS RATIO IN NORTHWEST BEIJING AND THE DEPTH OF CRUST
     京西北地区近震波速、平均波速比及地壳厚度的测定
短句来源
     TENTATIVE PLANS ON CONSTRUCTION OF GUANTING ECOLOGICAL GARDENS IN NORTHWEST BEIJING
     关于建立京西北官厅生态园区的设想
短句来源
     (4) Lucubrated characteristics of strong earthquake recurrence and sought out the most suitable probability distribution model for the recurrence intervals of strong earthquakes according to the process of constructing Model of Northwest Beijing on the basis of the catalog of paleoearthquakes for some specific segments acquired by analyzing and summarizing systemically.
     4) 综合研究得到河套断陷带各断裂段落的(古)地震目录,在此基础上,深入分析各断裂段落的强震复发特点,并参照京西北模型的建模过程,结合其采用的基础数据,建立河套断陷带的强震复发间隔概率分布模型;
短句来源
  northwest of beijing
     In order to investigate the change of gravity field in the northwest of Beijing and the north of Hebei provice and to provide the background of tectonic action, we processed and analysed all gravity data from Oct, 1971 to Dee, 1983 for the Beijing-zhangjiakou profile systematically.
     为了搞清楚京西北、河北北部地区重力变化情况,探明构造活动的背景,我们将北京—张家口重力剖面自1971年10月至1983年12月的全部测量资料作了系统处理,分析。
短句来源
     An extrapolation test has also been carried out on the Heze earthquake M5.9 on November 7th, 1983 and the seismicities in the Wenan-Baxian area in 1983-1984, by using the judgment model, and the result is also correct, finally, the earthquake tendency in the area northwest of Beijing has been estimated by this model.
     文章还应用该评判模型对1983年11月7日菏泽5.9级地震、文安坝县地区1983—1984年的地震活动进行了外推检验,结果也是正确的。 最后用该模型对京西北地区的地震趋势进行了估计。
短句来源
     PROBABILITY MODEL FOR STRONG EARTHQUAKE RECURRENCE AND QUANTITATIVE ESTIMATES OFSEISMIC POTENTIAL IN THE BASINN-AND-RANGE PROVINCE,NORTHWEST OF BEIJING
     京西北盆岭构造区强震复发概率模型及地震潜势的定量评估
短句来源
     The abnormal change of wave velocity ratio in northwest of Beijing before Zhangbei 6.2 earthquake
     张北62级地震前京西北地区地震波速比的异常变化
短句来源
     Eco-environmental Degenerative Context and Control Measures of the Developing-sand Area in Northwest of Beijing
     京西北沙化发展区生态退化机理及治理方略
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  “京西北”译为未确定词的双语例句
     CRAVITY VARIATION IN NORTHEAST AREA OF BEIJING AND DATONGYANGGAO EARTHQUAKE
     京西北地区重力场变化与大同—阳高地震
短句来源
     Q SH in the Yanqing Huailai basin, NW of Beijing and determination of source parameters of small earthquakes
     京西北延庆-怀来盆地的Q_(SH)值和小震震源参数的测定
短句来源
     With this severe safety crisis of the country, rebuilding and consolidating the border defense line of the northwest areas of Chang An turned out to be the first important matter of the rulers of Tang Dynasty.
     面临严峻的国家安全危机,重建并巩固京西北边防线成为摆在唐王朝统治者面前的头等大事。
短句来源
     This paper mainly studies Tang's rebuilding and consolidating of the border defense line in the northwest areas of after Anshi Rebellion as well as the specific process, main stages, measures, characteristics and achievements during its rebuilding and consolidating, in which the strategic decisions made by Tang Dynasty, the opinions suggested by generals and comments made by related people are also involved.
     本文主要研究安史之乱后唐王朝如何重建和巩固京西北边防线,考察其重建和巩固的具体过程、主要阶段、采取的措施、特点以及取得的成效等,涉及到诸如采取的战略决策、将相们的意见和建议以及对相关人物的评价。
短句来源
     By analysis and study of M 1≥1.0 earthquakes activities in the northwest area of Beijing in 1993-1998,it has been obtained that the Zhangbei M6.2 earthquake occurred on the composite position of the east-west striking Quarternary fault and Wanquan fault. The seismic activities were frequant on Wanguan fault and Zijingguan fault in recent years before the earthquake,and there was an obvious seismic migrating activity from north to south on the Wanquan fault.
     根据1993—1998 京西北地区ML≥1.0 级地震活动分析研究得出:张北6.2 级地震发生在东西向第四纪断裂带与万全断裂带的复合部位上,震前万全断裂带和紫荆关断裂带近年来地震活动频繁,并且在万全断裂带上有明显的地震由北向南再由南向北的迁移活动。
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  northwest beijing
The heterogeneous characteristics of crustmantle structures and the seismic activities in the northwest Beijing region
      
  northwest of beijing
On July 20, 1995, an earthquake of ML=4.1 occurred in Huailai basin, northwest of Beijing, with epicenter coordinates 40.326°N, 115.448°E and focal depth 5.5 km.
      
Dynamic Changes of Sandy Land in Northwest of Beijing, China
      
The area northwest of Beijing is one of the most important regions where many organizations invest and pay most attention.
      
Then the process and the trend of changes in sandy land and their environmental impact on the area northwest of Beijing were analyzed.
      
Dingling, located in northwest of Beijing, is on the pathway of the non-local sources from northwest of Beijing.
      
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In Beijing plain area the tectonic settings during the Tertiary period having an upheaval in its northwestern part, a depression in its central part and Dai Xing upheaval suffered remarkable changes in the course of recent tectonic movement. From the repeated levelling data it is suggested that along the NW trending Nankou-Sunhe fault was generated a subsidence zone cutting across the NE trending Tertiary structure and destroying the original tectonic framework.In connection with this the recent strain field...

In Beijing plain area the tectonic settings during the Tertiary period having an upheaval in its northwestern part, a depression in its central part and Dai Xing upheaval suffered remarkable changes in the course of recent tectonic movement. From the repeated levelling data it is suggested that along the NW trending Nankou-Sunhe fault was generated a subsidence zone cutting across the NE trending Tertiary structure and destroying the original tectonic framework.In connection with this the recent strain field also shows an obvious change. From the deformation tendency plot compiled on the basis of repeated levelling data the long axis of contour lines takes the direction from nearly east-west to north-west-west reflecting a tensile direction on the earth's surface. Further triangulation surveys indicate that the tensile direction is south-east, the compression direction is north-east in the Beijing plain area. The tensile strain amounts to 2.5/10-6, while the compression strain is 0.8/10-6, much lesser than the former.Some faults in this area have showed anomalous activities before the Tangshan earthquake. During the period of 1973-1976, six faults have a tendency of increasing or reversing activities, but in 1976, four of them rebounded to the same situation as in 1973. It is preliminarily belived that the activities of these faults may be related to the 1976 's Tangshan earthquake.

从测量资料的研究得知北京平原地区的现代构造形态与第三纪形成的京西北隆起、北京凹陷、大兴隆起等不相符合。由于出现一个北西向的下降带,使原来“两隆夹一凹”的构造形态可能解体。同时,应变场也起了变化,认为该地区目前处在南东方向的拉伸应力场中。

In order to investigate the change of gravity field in the northwest of Beijing and the north of Hebei provice and to provide the background of tectonic action, we processed and analysed all gravity data from Oct, 1971 to Dee, 1983 for the Beijing-zhangjiakou profile systematically.The field records are reexamed. All gravity differences are recaleulated with the practical calibration function. We made a series of correction, such as the conversion for different gravity baseline correction of gravity point sites...

In order to investigate the change of gravity field in the northwest of Beijing and the north of Hebei provice and to provide the background of tectonic action, we processed and analysed all gravity data from Oct, 1971 to Dee, 1983 for the Beijing-zhangjiakou profile systematically.The field records are reexamed. All gravity differences are recaleulated with the practical calibration function. We made a series of correction, such as the conversion for different gravity baseline correction of gravity point sites and the differences of two Sets of gravimeters.The effect of the crustal deformation, rain fall and atmospheric pressure chang on the gravity values are estimated.The author considers that the gravity change that seems to be caused by faults action on the measuring segments across the faults is occured due to strengthening of the stress field in North China, from Aug. 1975 to June, 1976, and the gravity anomaries of the profile are quite different in time and the shape of the change from that of the Tangshan earthquake(M_S 7.8).The trend change of gravity values of the profile has not been observed recently.

为了搞清楚京西北、河北北部地区重力变化情况,探明构造活动的背景,我们将北京—张家口重力剖面自1971年10月至1983年12月的全部测量资料作了系统处理,分析。 对野外记录进行了查核。采取实用格值计算段差,将计算结果进行了基线场换算,点位、仪器台差等校正,得到一套完整的剖面资料。 估算了地壳形变、降水量与蒸发量之比,气压变化等对剖面重力值的影响。 作者认为,自1975年8月至1976年6月由于华北应力场加强,本剖面所跨断裂的测段,发生了似乎由构造活动所引起的重力变化。并且在时间与异常形态上与唐山测点所表现出的唐山大震前兆重力异常有明显差异。 本剖面近期未发现趋势性重力变化。

According to seismicity data obtained in North China, this paper has distinguished some seismicity characteristics for a number of years before each of eight earthquakes with M>5 occurred in North China in the last 20 years, and constructed their subordinate functions and multilevel fuzzy judgment model through fuzzy synthetic decision model. The final synthetic decision result is satisfactory and basically coincident with the real cases. An extrapolation test has also been carried out on the Heze earthquake...

According to seismicity data obtained in North China, this paper has distinguished some seismicity characteristics for a number of years before each of eight earthquakes with M>5 occurred in North China in the last 20 years, and constructed their subordinate functions and multilevel fuzzy judgment model through fuzzy synthetic decision model. The final synthetic decision result is satisfactory and basically coincident with the real cases. An extrapolation test has also been carried out on the Heze earthquake M5.9 on November 7th, 1983 and the seismicities in the Wenan-Baxian area in 1983-1984, by using the judgment model, and the result is also correct, finally, the earthquake tendency in the area northwest of Beijing has been estimated by this model.

本文应用模糊综合评判模型,并根据华北有关地震的资料,对华北地区近二十年来发生的8次5级以上地震前若干年内的一些地震活动特征进行了识别,建立了它们的隶属函数和多级模糊评判模型,最后综合评判的结果是满意的,与事实是基本相符合的。文章还应用该评判模型对1983年11月7日菏泽5.9级地震、文安坝县地区1983—1984年的地震活动进行了外推检验,结果也是正确的。最后用该模型对京西北地区的地震趋势进行了估计。

 
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