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波辐射
相关语句
  wave radiation
     According to the dislocation model, it is because that the dislocation D(ξ, t) from which elastic wave radiation field has been calculated is jusjt the inelastic displacement, at the instant of rupture.
     根据位错模式由于计算弹性波辐射场的位错量 D(ξ,t),正是破裂瞬间产生的非弹性位移,所以用弹性位移公式来计算地震位错量是错误的.
短句来源
     P wave radiation patterns in transversely isotropic media are analyzed by using analytical and numerical methods.
     用解析方法和数值方法分析了横向各向同性介质中的P波辐射图案。
短句来源
     Body wave radiation patterns in transversely isotropiccmedia are analysed numerically and analytically.
     本文通过数值和解析方法分析了横向各向同性介质中的体波辐射图案。
短句来源
     Model of earthquake recurrence: Role of elastic wave radiation, relaxation of friction , and inhomogeneity
     地震复发模型:弹性波辐射、摩擦松弛和非均匀性的作用
短句来源
     Gravitational Wave Radiation of a Complex EM Resonator
     复合电磁谐振腔的引力波辐射
短句来源
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  “波辐射”译为未确定词的双语例句
     Auroral Kilometric Radiation and Auroral Hiss:DE-1 Observation Results
     DE-1卫星对千米波辐射和极光嘶声的部分观测结果及分析
短句来源
     Design of 8mm band interference microwave radiation imagine system
     8mm波段干涉式微波辐射成像系统设计
短句来源
     Methods AdoptEBH-VI otolaryngology colligate cure instrument made in ZhuHaiHeJia equipment company, the output poweris 50~60 watt, Use contract microwave radiation bar cling to the surface of lymph follicle and last 3~5 second.
     方法采用珠海和佳设备公司生产的EBH—VI耳鼻喉综合治疗仪,输出功率50~60W,将接触式微波辐射棒紧贴淋巴滤泡表面,持续3~5秒。
短句来源
     The frequency range of AKR is from 50 kHz to 400 kHz or more, but the peak intensity is around 200 kHz.
     仅就带宽而言,千米波辐射可以从50kHz到大于400kHz,但峰值强度处于200kHz左右.
短句来源
     Study on three dimensional thermal field of double implanted microwave radiation
     双电极植入式微波辐射三维热场的研究
短句来源
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  相似匹配句对
     RADIATION WITH WALSH WAVES
     用沃尔什辐射
短句来源
     Study of Feature of the Gravitation Wave Radiation
     引力辐射特性探讨
短句来源
     Chase after the wave
     追
短句来源
     On radiation from printed circuits
     印制电路的辐射
短句来源
     CHANNELING RADIATION
     沟道辐射
短句来源
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  wave radiation
In the study of wave radiation by oscillators moving in a fluid considerable interest attaches to the question of the effect which the radiation has on the nature of the motion of the source.
      
By analyzing the expressions for the mean energy losses due to internal wave radiation per unit time it is shown that in fluids with convex wave dispersion curves up to four types of waves per mode are possible.
      
Effect of capillary wave radiation on the oscillations of a vibrator
      
The dispersion equation for the capillary oscillations of a charged drop of viscous incompressible fluid of finite electrical conductivity with account for energy loss by electromagnetic-wave radiation is obtained.
      
The limits of applicability of the proposed analytic theory of wave radiation are determined.
      
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Having described shortly the properties of walsh functions and their applications in all respects,it is particularly interested in this paper to analyse the radiation properties of antennas excited by walsh waves.The radiation patterns and directivities of a dipole antenna and antenna arrays excited by sinusoidal and walsh waves are compared.

本文在简单介绍沃尔什函数的特点及其在各方面的应用之后,着重对天线采用沃尔什波辐射的问题进行了分析。对偶极子天线和天线阵列用正弦波和沃尔什波辐射时的方向图和方向性系数进行了比较。

After a brief description of the properties of Wetlsh functions and some of their applications, we give, in this paper, special emphasis on the discussion of the radiation properties of antennas excited by Walsh waves. The radiation patterns and directivities of a lipole antenna and antenna arrays excited by sinusoidal and Walsh waves are compared. The directivity of in array excited by weighted Walsh current has also been calculated.

本文在简单介绍沃尔什函数的特点及其某些应用之后,着重对天线采用沃尔什波辐射的问题进行了分析。对偶极子天线和天线阵列用正弦波和沃尔什波辐射时的方向图和方向性系数进行了比较。最后计算用沃尔什电流加权激励的天线阶的方向性。

In this work the process of earthquake rupture is studied by means of the theory of fracture mechanics. It is believed that the phenomenon of earthquake is essentially caused by the rupture of rock media under low shear gtress conditions. It is the result of continual development of cracks from the stable to the final unstable state. The change of stress and displacement in the process of crack development has been analysed from which one can see that the stress at any point where rupture will occur always undergo...

In this work the process of earthquake rupture is studied by means of the theory of fracture mechanics. It is believed that the phenomenon of earthquake is essentially caused by the rupture of rock media under low shear gtress conditions. It is the result of continual development of cracks from the stable to the final unstable state. The change of stress and displacement in the process of crack development has been analysed from which one can see that the stress at any point where rupture will occur always undergo a rise from its initial value (τ0) to the yielding strength (τy) before rupture. After rupture, the stress on the crack surface will drop to a low value near zero. The displacements before and after rupture can be calculated by the formulae of theory of elastic ity but at the instance of rupture, the inelastic displacement at the tips of crack is not given by the same formulae, which may be approximately obtained from the slide displacement formula in fracture mechanics. According to the dislocation model, it is because that the dislocation D(ξ, t) from which elastic wave radiation field has been calculated is jusjt the inelastic displacement, at the instant of rupture. Therefore, to estimate stress drop and calculate earthquake dislocation by elastic displacement formulae will be erroneous. If the earthquake dislocation is estimated by the slide displacement formula in fracture mechanics, more adequate formulae for calculating the total energy ET(ET =τ’tyD S, τy= yield strength, D = average dislocation, S = area of the fault surface) released by an earthquake andthe initial stress τ0( ,L=length of fault ) can be deduced.Using these formulae, the total energy ET released by some earthquakes and the initial stress To are estimated and listed in the table 1 and 2. They are more reasonable than before. They demonstrate that (1) most earthquakes take place under low initial stress, about 100-200 bars, (2) the total energy released by an earthquake is about one order of magnitude higher than the seismic wave energy.

本文讨论了利用破裂力学理论说明地震破裂的过程,认为地震本质上是岩石在应力作用下的低应力破裂现象.它是岩石中的裂纹不断稳态扩展、最后进入失稳扩展的结果.分析了在扩展过程中应力和位移的变化,发现任何将要破裂的那一点的应力都要由初始应力τ_(?)升高到屈服应力τ_y 以后才破裂,破裂后裂纹面上的点的应力降到0.在破裂前和破裂后的位移,都可由弹性力学方程给出.在破裂的一瞬间破裂的端点产生的非弹性位移,则不能由弹性力学方程给出.它可以由断裂力学中的裂纹滑开位移公式近似给出.根据位错模式由于计算弹性波辐射场的位错量 D(ξ,t),正是破裂瞬间产生的非弹性位移,所以用弹性位移公式来计算地震位错量是错误的.我们采用了裂纹滑开位移公式来计算地震位错量,从而导出了较合理的计算地震释放总能量的公式 E_T=τ_y(?)S(τ_y 为屈服强度;(?)为平均位错;S 为断层面积)以及估算初始应力值τ_0的公式:τ_0 =[D_(max)/L·4μτ_y/(1-ν)π ]~(1/2)(L 为断层长度).用它们计算了一些地震的 E_r 和τ_0,分别列于表1和表2.这些结果比以往的结果要更合理一些。 结果表明:(1)地震多数是...

本文讨论了利用破裂力学理论说明地震破裂的过程,认为地震本质上是岩石在应力作用下的低应力破裂现象.它是岩石中的裂纹不断稳态扩展、最后进入失稳扩展的结果.分析了在扩展过程中应力和位移的变化,发现任何将要破裂的那一点的应力都要由初始应力τ_(?)升高到屈服应力τ_y 以后才破裂,破裂后裂纹面上的点的应力降到0.在破裂前和破裂后的位移,都可由弹性力学方程给出.在破裂的一瞬间破裂的端点产生的非弹性位移,则不能由弹性力学方程给出.它可以由断裂力学中的裂纹滑开位移公式近似给出.根据位错模式由于计算弹性波辐射场的位错量 D(ξ,t),正是破裂瞬间产生的非弹性位移,所以用弹性位移公式来计算地震位错量是错误的.我们采用了裂纹滑开位移公式来计算地震位错量,从而导出了较合理的计算地震释放总能量的公式 E_T=τ_y(?)S(τ_y 为屈服强度;(?)为平均位错;S 为断层面积)以及估算初始应力值τ_0的公式:τ_0 =[D_(max)/L·4μτ_y/(1-ν)π ]~(1/2)(L 为断层长度).用它们计算了一些地震的 E_r 和τ_0,分别列于表1和表2.这些结果比以往的结果要更合理一些。 结果表明:(1)地震多数是在低应力作用下(即低初始应力)发生的(约100—200巴);(2)地震释放的总能量约比地震波能量大一个数量级.

 
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