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inversion     
相关语句
  反演
    The Theoty and Application Study on Nonlinear Optimization Methods for Seismic Inversion
    地震反演中的非线性优化方法及应用研究
短句来源
    Study on Source Process Inversion with Far Field Body Waves
    用远场体波反演震源破裂过程研究
短句来源
    Remote Sensing Information Extraction and Quantitative Inversion Research of Silt Tidal Flat and Suspended Sediment of Case Ⅱ Waters in Coast Zone
    海岸带淤泥质潮滩和Ⅱ类水体悬浮泥沙遥感信息提取与定量反演研究
短句来源
    Studies on the Method of Multi-attribute AVO Analysis & Elastic Parameters Inversion
    多属性AVO分析及弹性参数反演方法研究
短句来源
    Inversion and Application of Frequency-domain AEM Data from a Layered Earth
    频率域航空电磁法层状反演及应用研究
短句来源
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  反转
    INVERSION STRUCTURE, GRAVITY-SLIDING STRUCTURE AND HYDROCARBON RESOURCE
    反转构造与重力滑动构造及油气
短句来源
    POSITIVE STRUCTURAL INVERSION AND THE MECHANISM ANALYSIS IN SONGLIAO BASIN
    松辽盆地的正构造反转及其形成机制探讨
短句来源
    Seismic data damage due to polarity inversion of 54°three-component geophone
    54°三分量检波器极性反转对地震记录的影响
短句来源
    POSITIVE INVERSION STRUCTURES AND THEIR SIGNIFICANCE TO PETROLEUM GEOLOGY IN CHINA OFFSHORE BASINS
    中国近海盆地的正反转构造及其石油地质意义
短句来源
    Origin analyscs of both negative inversion faults and negative inversion structures in Palaeozoic Group in coastal region of north Shandong Province
    山东北部滨海地区负反转断层及古生界负反转结构成因分析
短句来源
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  倒置
    Oil/water Inversion and Its Genetic Mechanism in the Higher Portions of the Single Sandstone Body
    单砂体高部位油水倒置分布的成因机制
短句来源
    The Jurassic is deep gas reservation and reflected by the feature of the gas and water inversion.
    侏罗系具有气水倒置(上水、下油气)现象,反映深盆气藏性质。
短句来源
    Fifthly, the existence of the nappe can result in inversion phenomenon of R0 values.
    (5)推覆体的存在,可导致Ro 值出现倒置现象。
短句来源
    Six properties include:①the downdip region is occupied in a large area by gas,while the updip region by water,forming a regional gas water inversion;
    6个特征是:①下倾区大面积含气,上倾区含水,区域性气水倒置
短句来源
    Because of an assemblage of the above-mentioned geological features, Upper Triassic gas accumulation has these characteristics such as bearing gas in large area, uncontrolled by structure, gas-water inversion and abnormally high pressure.
    由于上述有利地质条件的配置,致使上三叠统气藏具有不受构造控制纵横向普遍含气、无统一气水界面、气水倒置、存在异常高压等深盆气藏特征。 川西坳陷深盆气的有利勘探区位于德阳以北的高异常压力分布区与高生烃强度分布区的叠合区。
短句来源
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  倒转
    INVERSION TECTONICS IN THE ANNINGHE FRACTURE ZONE (On the example of Lizhou-Lugu belt)
    安宁河断裂带中的倒转构造──以礼州、泸沽一带为例
短句来源
    CORROSION-REACTION MARGIN WITH INVERSION OF POLYSYNTHETIC TWINNING OF PLAGIOCLASE IN MIGMATITES: ANEXAMPLE FROM QUARTZOFELDSPATHIC GNEISS IN DABIESHAN
    混合岩中斜长石的交代净边结构和倒转双晶研究——以大别罗田黄土岭长英片麻岩为例
短句来源
    A complementary twinning on (100) would be formed between theanti-oriented structure pair, and their twin boundary is exactly equivalent tothe inversion boundary.
    互为异极反取向关系的结构对之间可形成以(100)为双晶面的补足双晶,其双晶界面正好等于一个倒转界面。
短句来源
    Secondary alteration during migration and/or in reservoirs makes chemical and isotopic composition rather complicated, especially the evaporative fractionation via micro leakage through cap rocks resulting in isotopic inversion.
    运移过程中和成藏后的次生变化使天然气的组成和同位素面目变得非常复杂 ,尤其是由盖层微渗漏造成的蒸发分馏作用使同位素出现倒转
短句来源
    Middle-deep strata in Yinggehai Basin are high temperature and abnormal high pressure formation with special seismic velocity characteristics, of which velocity inversion exists in middle-deep strataCabout 2250m).
    莺歌海盆地中深层为高温、异常高压地层,具有独特的地震速度特征,在中深层(约2250m)速度存在倒转现泉。
短句来源

 

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      inversion
    Finally, the problem of inversion of a multiplier will be analyzed for smooth functions that have a specified structure near their zeros.
          
    Pointwise fourier inversion: A wave equation approach
          
    When F is the characteristic function of [0, R2], this gives a representation for radial Fourier inversion.
          
    A number of topics related to pointwise convergence or divergence of such inversion, as R → ∞, are studied in this article.
          
    Pointwise fourier inversion and localisation in Rn
          
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    In this study preliminary results are presented for the investigation of the crustal structure of the South- central part of Shansi Province by use of the time-term method, applied to the material obtained during several industrial explosions carried out in Chang-an, Dai Hsien and Taigu. An adaptation of the method is made for those explosions of which the origin times are not known. The velocity just below the M-discontinuity is found to be 7.95±0.04 km/sec. Assuming an average velocity of 6.4 km/sec, for the...

    In this study preliminary results are presented for the investigation of the crustal structure of the South- central part of Shansi Province by use of the time-term method, applied to the material obtained during several industrial explosions carried out in Chang-an, Dai Hsien and Taigu. An adaptation of the method is made for those explosions of which the origin times are not known. The velocity just below the M-discontinuity is found to be 7.95±0.04 km/sec. Assuming an average velocity of 6.4 km/sec, for the crust, the time-terms for 41 locations were obtained, whence the corresponding depths of the M-discontinuity were computed by inversion. The relation between these and the seismicity or mechanism of earthquakes in this area is briefly discussed.

    本文是对陕西长安、山西代县和太谷等地工业爆破的资料采用时间项法研究晋中南地壳结构的初步成果。文中首先结合长安爆破观测资料的总结,对时间项方法作一介绍。为使用太谷等缺乏起爆时刻的爆破资料,对时间项方法作了一些改进,使对于那些未有起爆时刻的爆破资料亦能用于确定时间项。使用上述爆破和各台记录的初动到时获得了晋中南地区的界面速度为7.95±0.04公里/秒,求得了41个点的时间项,取莫霍面以上介质的平均速度v_0=6.4公里/秒反演求得了各点的莫霍界面深度,并对所得的结果结合晋中南地区的地震活动性及部分地震震源机制结果进行了初步的分析和讨论。

    This paper presents a method called the "Compressed Mass Plane" to approximate, a two-dimensional geological body. At first, the data of a gravity data is inversed, using matrix analysis to get the surface density of each element of the compressed mass plane. Then, from the relation between surface density and mass density of each element, the thickness of each two-dimensinal element can be calculated and the approximate thickness of the crust tentatively obtained. Further improvements of the estimation of the...

    This paper presents a method called the "Compressed Mass Plane" to approximate, a two-dimensional geological body. At first, the data of a gravity data is inversed, using matrix analysis to get the surface density of each element of the compressed mass plane. Then, from the relation between surface density and mass density of each element, the thickness of each two-dimensinal element can be calculated and the approximate thickness of the crust tentatively obtained. Further improvements of the estimation of the crustal thickness can be made by direct gravity computation of the crustal model thus obtained and repeated adjustments of the results in order to minimize the difference between computed and observed gravity anomalies. In that way, it may be possible to get the better depths of the lower boundary of the crust.Based on the assumed values of contrast between the "Basaltic", the "Granitic" layers and the Upper Mantle and also the above calculated crustal thickness, it is again possible to calculate the gravity anomalies coming from the undulations of the Mohorovicic and (Conrad interfaces respectively. By the same way, the inversion of the gravity anomaly of the Conrad interface, a comparatively correct position of this interface can be obtained.To test this method of gravity inversion, three hypothetic crustal models and an observed gravity profile are introduced here as examples. In comparing with other methods of determining crustal interfaces, the results of the present method of compressed mass plane seem to be better.

    本文用压缩质面来近似二维地质体。先由地面上测得的重力数据用矩阵方法反演此压缩质面各单元的面密度,然后从面密度与体密度差的关系求得各二维质体单元的厚度,进而得到各单元的近似地壳厚度。经正演校验和反复调整结果,使计算的重力异常值与实际测量值之残差小到满足要求,从而得到较准确的地壳底部界面。 由上地幔,玄武岩层和花岗岩层的密度差异及已算出的地壳厚度,从重力异常中分解出莫霍界面和康腊界面起伏所分别引起的重力异常。将后者同样用反演地壳厚度的压缩质面法进行计算,得到康腊界面。 文中以三种假想的地壳模型和一个实测剖面为例来检验本方法,并用其他确定地壳界面方法所得到的结果相比较,表明本文提出的压缩质面法结果较好。

    The fundamental principles and method of deducing a source model of the earthquake from "zero frequency" data are developed, and a dislocation model of the Tangshan earthquake (M8 = 7.8) of 1976 is deduced from the inversion of geodetic data. The results obtained indicate that the source of the Tangshan earthquake is a right-lateral normal fault striking generally N 49°E, and diping 76°SW. The fault is of length, 84 km, width 34 km, average strike-slip dislocation 459 cm, average dip-slip dislocation 50...

    The fundamental principles and method of deducing a source model of the earthquake from "zero frequency" data are developed, and a dislocation model of the Tangshan earthquake (M8 = 7.8) of 1976 is deduced from the inversion of geodetic data. The results obtained indicate that the source of the Tangshan earthquake is a right-lateral normal fault striking generally N 49°E, and diping 76°SW. The fault is of length, 84 km, width 34 km, average strike-slip dislocation 459 cm, average dip-slip dislocation 50 cm, seismic moment 4.3 X 1027 dyne-cm, stress-drop 29 bar, strain-drop 4.3 X 10-5, and strain-energy release 3.7 X 1023 ergs. The fact that the average disloca-tion deduced from the geodetic data is much larger than that from seismic data, implies that before the earthquake, an aseismatic slip i.e. a precursory fault creep, had occurred within the crust beneath the epicentral area. The moment of the aseismic slip is estimated to be 2.5 X 1027 dyne-cm. It is concluded that although before Tangshan earthquake, no foreshock was observed, a large-scale pre-creep had occurred instead of the ordinary foreshock. This may be an essential characteristic of the Tangshan earthquake, and many peculiar precursory phenomena before the shock may be related to this pre-creep.

    运用反演理论探讨了由“零频”资料反演大地震震源模式的基本原理和方法,并用大地测量资料反演了1976年唐山7.8级地震的位错模式。得到的结果表明唐山地震的发震构造是一个总体走向为北东49°的右旋-正断层,断层面倾向南东,倾角76°。这个地震的断层长84公里,宽34公里,走向滑动错距459厘米,倾向滑动错距50厘米,地震矩4.3×10~(27)达因-厘米,应力降29巴,应变降4.3×10~(-5),释放的能量3.7×10~(23)尔格。由形变资料反演的平均错距和地震矩远大于由地震波资料定出的平均错距(270厘米)和地震矩(1.8×10~(27)达因-厘米),它表明在地震区的地壳内震前可能已经发生了无震滑动——断层蠕动。无震滑动的规模比主震还要大一些,它的矩估计约为2.5×10~(27)达因-厘米。唐山地震前虽然没有前震,但是却有规模这么大的“震前蠕动”,这可能是唐山地震与其他许多有前震的地震(如海城地震)的根本区别,它的许多与别的地震不同的前兆可能与此有关。

     
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