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major axis
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    Finite strain measurements and estimate of differential stress value show:from Jiaojia major fault to Wang ershan secondary fault,major axis ratio of deformation keybody dropped a little、Kvalue increased a little,the direction of differential stress is NWWSEE trending.
    应变测量和差应力估算表明:从焦家主断裂到望儿山支断裂的糜棱岩变形标志体有主轴比变小、K值增大、古应力值逐渐变小的趋势,韧性变形阶段差应力方向为NWW SEE。
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  “major axis”译为未确定词的双语例句
    Near the end points of the major axis the angle φ0≈0 θ0≈80.5 °They agree with the didections obtained from two dimensional analysis.
    ,0o=80.5°,这和二维分析得到的扩展分支的方向一致。
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    Individual ore shoot is lenticular,with the major/minor axis ratio of 2 to 1,and the major axis pitching to southwest at an angle of 50°-60°.
    富矿体长轴向SW侧伏,侧伏角50°—60°,长宽比为2∶1,出露标高向SW次第降低呈斜列之势;
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    Through finite strain measurement,the major axis(X),the middle axis(Y) and the minor axis(Z) in the deformed rocks can be measured,and the ratio among the three axes(X∶Y∶Z) can be calculated.
    利用岩石应变测量方法测量出岩石中变形标志体长轴、中间轴、短轴之间的比值(X∶Y∶Z),计算构造块体的三轴比率;
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    The earthquake sequence was of mainshock-aftershock type with the largest aftershock of ML5.3.The major axis of the aftershock area was in NW direction.
    5.7级地震的最大余震为ML5.3级,序列类型为主震—余震型,余震较丰富,余震区长轴为北西向。
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    Meanwhile, the temperature and atmospheric CO_2 have the significant effects on the trends of coral density, linear extension and calcification. Oxygen isotope ratios, ~(18)O/~(16)O, were analyzed along the major axis of growth at a resolution of 25-28 samples within an annual band from three colonies.
    珊瑚生长参数变化趋势是近几十年来密度减小、生长率增大,这一特征最明显地发生于最近20年,其中突然的变化是1986-1987年,这一趋势与近年来全球升温和大气CO_2增加趋势是一致的;
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  major axis
At the phase plane "the longitude of the subsatellite point-semi-major axis" the regions of migration of separatrices where the separatrices can move due to the influence of perturbations are isolated.
      
The dimensions of these regions and the distances between them have the same order of magnitude, several kilometers along the semi-major axis.
      
Flow past an oblate ellipsoid of revolution aligned along the major axis
      
We found no evidence of gas rotation around the major axis of NGC 6286, which argues against the assumption that this galaxy has a forming polar ring.
      
We found no significant deviations from the circular rotation of the galactic disk in the velocity field in the regions of brightness excess along the major axis of the galaxy (the putative polar ring).
      
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This paper deals with the seismicity background before the Haieheng earthquake of February 4, 1975, the earthquake sequence and its space distribution.Normally, there has been very low seismic activity around the meizoseismal re-gion of the Haicheng earthquake. But since February 1, 1975, 527 foreshocks were recorded at the Shipengyu (石硼峪) seismological station located about 20km from their epicenters. The epicenters of such foreshocks are densely concentrated. The signs of the initial motion of their P waves...

This paper deals with the seismicity background before the Haieheng earthquake of February 4, 1975, the earthquake sequence and its space distribution.Normally, there has been very low seismic activity around the meizoseismal re-gion of the Haicheng earthquake. But since February 1, 1975, 527 foreshocks were recorded at the Shipengyu (石硼峪) seismological station located about 20km from their epicenters. The epicenters of such foreshocks are densely concentrated. The signs of the initial motion of their P waves are about the same. With respect to their time of occurrence, the succession appeared as concentration of foreshocks, then a period of quiteness and finally the main shock. Following the main shock there occurred a great many after-shocks.The direction of the major axes of the isoseismal lines of the main shock with in the meizoseismal area coincides with that of the region of aftershocks distribution and the direction of the A nodal plane of the earthquake fault solution. From this, it has been inferred that the strike of the dislocating fault plane of the main shock is NWW. It seems to be a left lateral horizontal slip fault with high dipping angle.Some discussions are also made in connection with a possible method of earthquake prediction immediately before such earthquake sequence.

本文对1975年2月4日发生的海城7.3级地震的震前地震活动背景、地震序列和空间分布上的特征进行了研究。 在海城地震的极震区附近,平时很少有地震活动。但自2月1日开始,距震中20公里的营口市石硼峪地震台连续记录到527次前震。这些前震的震中位置很集中,其P波初动符号比饺一致,在时间分布上出现了密集—平静—大震的现象。大震以后的余震很多。 主震极震区的长轴方向与余震分布区的长轴方向和主震震源机制的A节面相一致。由此推测,主震的错动面为北西西走向,可能是高倾角的左旋平移断层的滑动结果。 文中还对临震预报的方法进行了一些讨论。

Before the Tangshan earthquake, magnitude 7.8 on July 28, 1976, nine of the fourteen resistivity stations located within the region of Peking, Tientsin and Tangshan recorded gradual decreases in apparent electrical resistivity for a period of 2-3 years. The anomalous region as deduced from the records of these nine stations has a semi-major axis of about 150 km surrounding the epicenter and yet two of the stations located very close to the epicenter recorded rapidly decreasing apparent resistivity anomaly...

Before the Tangshan earthquake, magnitude 7.8 on July 28, 1976, nine of the fourteen resistivity stations located within the region of Peking, Tientsin and Tangshan recorded gradual decreases in apparent electrical resistivity for a period of 2-3 years. The anomalous region as deduced from the records of these nine stations has a semi-major axis of about 150 km surrounding the epicenter and yet two of the stations located very close to the epicenter recorded rapidly decreasing apparent resistivity anomaly during a period of more than 2 months immediately before the earthquake. According to results of some field measurements in-situ of the apparent resistivity decrease due to compression of rock or soil layers near earth's surface, we estimated that the linear compressional strain of shallow layers in and around the epicentral area is about 3 × 10-5. Compressional strain of much the same order of magnitude has been observed by base line survey before the Tangshan earthquake.

1976年7月28日唐山7.8级强震前,北京、天津、唐山地区已布设14个形变电阻率观测台站,其中9个台,震前2—3年内记录到形变电阻率长趋势下降异常,这9个台围绕震中形成一个半长轴可达150公里的异常区.位于震中区的两个台还记录到临震前2—3个月内的加速下降异常.根据现场条件下地表浅部岩(土)层受压时,视电阻率下降的实验结果,认为在震中周围较大的区域内,震前浅部岩(土)层被压密,其压缩线应变的数量级约为3×10~(-5).这一认识得到唐山震前地面基线实测资料的支持.

The study of stress field in the crust is a basic problem in earthquake study. The general features of the stress field in the crust under North China (φ30°-41°N, λ105°-24°E) were obtained from analysis of the following data: (l)earthquake me-chanisms which include, fault plane solutions of earthquakes which occurred during the period 1937-1979 and composite fault plane solutions of weaker earthquakes in a period of more than 10 years; (2) earthquake fractures appearing on the earth's sur-face at the time of...

The study of stress field in the crust is a basic problem in earthquake study. The general features of the stress field in the crust under North China (φ30°-41°N, λ105°-24°E) were obtained from analysis of the following data: (l)earthquake me-chanisms which include, fault plane solutions of earthquakes which occurred during the period 1937-1979 and composite fault plane solutions of weaker earthquakes in a period of more than 10 years; (2) earthquake fractures appearing on the earth's sur-face at the time of earthquakes; (3) the directions of major axes of isoseismals of 41 earthquakes of M ≥ 6 in the time period from 143 to 1976; (4) geodetic results in regions of some major earthquakes. This is a fairly consistent stress field in which the maximum compressional axis is in the northeast-east direction and the minimum axis in the north-northwest direction, both axes being nearly horizontal.From the observations of several great earthquakes, the extent of this consistent stress field is larger than North China. For areas considerably removed from North China, the stress field in the crust is essentially the same, showing that the origin of the stress field is not restricted to the crust of North China but to the tectonic move-ment on a much larger scale. The interactions between the Eurasian Plate, the Indian Plate and the Pacific Plate and the particular location of North China which is far from the margins of the plates are probably the main causes of the characteristics of the stress field in the crust of North China.

地壳应力场的研究是地震学中的一个基本课题。本文根据对四个方面资料的分析得到了华北地区(φ30°—41°N,λ105°—124°E)地壳应力场的基本特征。这些资料是:1.地震机制,包括1937年至1979年地震的断层面解和最近十多年中的小地震综合断层面解;2.地震时的地面裂缝;3.公元143年至1976年41次M≥6地震的等震线的长轴方位;4.某些大地震地区的大地测量结果。这是一个一致性相当好的应力场,其最大压应力轴为北东东向,最小压应力轴为北北西向,并且都近于水平向。 从一些大地震的观测事实来看,具有这种一致性应力场的范围要比华北地区大,在远离华北的地方,仍表现出同华北以内相似的地壳应力场。这个事实表明,上述地壳应力场的来源,不限于华北地壳内部,而同更大规模的构造运动有关。欧亚板块、印度洋板块同太平洋板块三者之间的相互作用,以及华北所处远离板块边缘的特殊位置,可能是造成该应力场特征的主要原因。

 
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