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principle and method
相关语句
  原则与方法
    PRINCIPLE AND METHOD DEALING WITH FELT HISTORICAL EARTHQUAKES
    历史有感地震处理的原则与方法
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  “principle and method”译为未确定词的双语例句
    THE PRINCIPLE AND METHOD OF ETVS CORRECTION APPLIED TO MARINE GRAVIMETRIC SURVEY
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    Principle and Method of System Analysis for Mineral Deposit Evaluation
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    The principle and method of trend surface analysis and its application in hydrocarbon exploration are introduced.
    本文介绍了趋势面分析的原理、方法及其在油气勘探中的应用。
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    Its principle and method and application examples are introduced.
    本文阐述了该方法的原理及应用实例。
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  principle and method
Principle and method of kinetic microphotometric enzyme activity determination in situ
      
A systematic analysis and processing of the relation between the fault deformation network in the Beijing-Tianjin area and earthquakes by part of the principle and method of system science (Information theory) is reported in this paper.
      
This paper reviews the development history and application status of high frequency wave radar, introduces its remote-sensing principle and method to inverse offshore fluid, and wave and wind field.
      
The constitutional principle and method of the new evaluation method were given and its feasibility and effectiveness were proved by the practical example.
      
The principle and method of GPR for cracks investigation of tunnel lining were expounded.
      
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At first, the authors describe here the principle and method of measuring the ground stress, including the construction of the stress guage employed, the technique of over-coring, laboratory model experiments, testing of the dependability of the stress measurements.In North China we used the method of over-coring to determine the absolute value of the ground stress. Although the observation was always made at a depth of less than 30 meters and the directions of the maximum principal stress are not...

At first, the authors describe here the principle and method of measuring the ground stress, including the construction of the stress guage employed, the technique of over-coring, laboratory model experiments, testing of the dependability of the stress measurements.In North China we used the method of over-coring to determine the absolute value of the ground stress. Although the observation was always made at a depth of less than 30 meters and the directions of the maximum principal stress are not entirely the same at each locality, but in considering the North China Region as a whole, the ground stress fieldis compressive and the predominant direction of its principal stress is NWW to EW.The absolute stress value determined within the epicentral region of a strong earthquake is usually less than that of the region outside it. It may indicate the process of stress release and adjustment of the stress field during the strong ear-thquakes.

本文首先叙述了地应力测量的原理和方法,包括应力计的结构、应力解除技术、室内模拟试验和观测可靠性的检验等。 在华北地区采用应力解除方法进行了地应力绝对值的测量。虽然测量大都是在地表以下30米内的浅部进行的,各测点最大主应力的方向也不完全一致,但从整个大区域来看,华北地区地应力场的主导方向为北西西到近东西方向的压应力。 大震后在震中区测得的应力值比离震中较远处测得的应力值要低。这可能反映了地震过程中的应力释放和震后应力的调整。

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。

Under the auspices of the State Bureau of Seismology a seismic zoning map of China (scale 1:3,000,000) has been compiled and issued in 1977 for the purpose of providing data for anti-seismic constructional designing and basic seismic intensity of various regions of the country.The basic seismic intensity of a region is defined as the maximum intensity to be suffered within a given interval of time in the future under the site condition of that region. The map is a sort of prediction of the basic seismic intensity...

Under the auspices of the State Bureau of Seismology a seismic zoning map of China (scale 1:3,000,000) has been compiled and issued in 1977 for the purpose of providing data for anti-seismic constructional designing and basic seismic intensity of various regions of the country.The basic seismic intensity of a region is defined as the maximum intensity to be suffered within a given interval of time in the future under the site condition of that region. The map is a sort of prediction of the basic seismic intensity for the next 100 years after 1973.In this paper, the major principles and methods in composing this map are discussed. Of course, as far as the present state of art of seismic zoning is concerned, the principles and methods used involve many shortcomings and therefore the reliability of the map in predicting seismic intensity is still rather uncertain.

国家地震局组织所属单位共同编制了《中国地震烈度区划图》(1∶300万),1977年已由国家地震局正式颁布,供建设规划和确定中、小型工程地区基本烈度使用参考.地震基本烈度是指某地区今后一定时期内,在一般场地条件下可能遭受的最大烈度.该图是一幅1973年以后未来百年内地震基本烈度的预告图.本文介绍了编制该图的主要原则和方法.由于目前对地震活动的认识水平和研究程度的限制,方法不可能是完善的,预告也不一定准确,有待今后进一步研究.

 
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