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慢度曲线
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  slowness curves
     The slowness curves of BAW in different planes of LGS were plotted. The propagating characteristics of SAW were also described.
     从理论上分析计算了LGS声体波传播特性,画出BAW慢度曲线
短句来源
     In this paper, the data of 140 earthquakes recorded at different azimuths from the Beijing network are used. By using both the smoothing method and dT/d△ method, the slowness curves of P-wave are obtained.
     本文选用了北京台网记录的来自不同方位并通过华北地区的140个地震,使用平滑法和dT/d△法,得到P波慢度曲线;
短句来源
     In this paper, the elastic constant matrix for anisotropic carbon fiber-reinforced (CFR) material is given by the measurement of ultrasonic wave velocities. According to this matrix and the characteristic equation for anisotropic solids, the slowness curves for this material are obtained.
     用声学方法测量了各向异性增强型复合碳纤维材料的弹性常数矩阵.由此矩阵,根据各向异性体的声波特征方程,给出材料在有关截面内的慢度曲线
短句来源
  “慢度曲线”译为未确定词的双语例句
     (5) Propagating characteristics of bulk acoustic wave (BAW) in CNGS crystal were studied.
     5、研究了CNGS晶体的声体波传播特性,画出了波在xy、xz、yz平面内传播的慢度曲线,并计算了声波沿x轴、y轴和z轴传播的速度。
短句来源
     After careful design and adjustment of the experiment system. Brillouin spectra of LiNbO3 crystals were measured in the 90° scattering scheme. We measured all independent elastic and piezoelectric constants of LiNbO3 crystals made in China in the hypersonic region.
     经过对实验系统的设计和调整,用90°散射测量了3m晶体LiNbO_3的布里渊谱,得到了LiNbO_3晶体在特超声频率下的所有独立的弹性常数和压电常数,据以计算了慢度曲线.
短句来源
  相似匹配句对
     curve
     曲线
短句来源
     Multiresolutiou Curves
     多分辨率曲线
短句来源
     By incorporating the travel-time and slowness data, continuous travel-time curves can be obtained.
     采取走时和慢度结合使用的方法,得到走时曲线;
短句来源
     The slowness curves of BAW in different planes of LGS were plotted. The propagating characteristics of SAW were also described.
     从理论上分析计算了LGS声体波传播特性,画出BAW慢度曲线
短句来源
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  slowness curve
The stiffness C13 was estimated by iteration so that the slowness curve of quasi-shear waves computed to an assumed C13 best matches the measured one.
      
The SAW slowness curve is elliptical for Y- or Z-cut crystal wafers, and circular for an X-cut wafer.
      
This condition, which can also be deduced on the basis of the erosion slowness curve, leads to a higher degree algebraic equation with a parameter, applicable for any dependence S=S (θ), expressed as an algebraic polynomial expression in cos θ.
      
  slowness curves
The two-dimensional slowness curves corresponding to different rotations are presented graphically.
      
The theoretical calculations of slowness curves are in good agreement with experimental results.
      


In this paper, the data of 140 earthquakes recorded at different azimuths from the Beijing network are used. By using both the smoothing method and dT/d△ method, the slowness curves of P-wave are obtained. By incorporating the travel-time and slowness data, continuous travel-time curves can be obtained. A simpler formcla than Gerver-Marku-shevish's formcla is derived and used to invert the intial veloctity models. Through computing theoretical travel-time curves of th initial velocity models, the final velocity...

In this paper, the data of 140 earthquakes recorded at different azimuths from the Beijing network are used. By using both the smoothing method and dT/d△ method, the slowness curves of P-wave are obtained. By incorporating the travel-time and slowness data, continuous travel-time curves can be obtained. A simpler formcla than Gerver-Marku-shevish's formcla is derived and used to invert the intial veloctity models. Through computing theoretical travel-time curves of th initial velocity models, the final velocity models which agree better with the observational data are obtained. The average velocity model shows that: a shallow low velocity zone begins near 60 km in depth: two abroupt increases in velocity from 360 to 420 km and from 660 to 680 km are also obtained; a possible minor zone of high-velocity gradient near 500 km is detected. Differences in depth of the zone of 600 km between the south-east and south-west directions in Northern China can clearly be seen.

本文选用了北京台网记录的来自不同方位并通过华北地区的140个地震,使用平滑法和dT/d△法,得到P波慢度曲线;采取走时和慢度结合使用的方法,得到走时曲线;从Gerver-Markushevich公式出发,导出一个易于计算的简捷形式,并由此反演初始速度模型;通过模型理论走时曲线的计算,选出与实测数据符合得较好的模型。平均模型中,低速层出现的深度较浅,约60公里;在360—420公里和660—680公里深处,存在两个速度急剧增加的梯度层;500公里处可能还有一个较小的梯度层。华北的东南和西南方向上,相当于660公里梯度层的深度的差异还较为显著。

In addition to pboto-elastic effect, we have also considered rotation and electro-optic effects in calculating Brillouin tensors of LiNbO3 crystals. After careful design and adjustment of the experiment system. Brillouin spectra of LiNbO3 crystals were measured in the 90° scattering scheme. We measured all independent elastic and piezoelectric constants of LiNbO3 crystals made in China in the hypersonic region. The spatial were also measured in the 180?back scattering scheme. Experimental results are in good...

In addition to pboto-elastic effect, we have also considered rotation and electro-optic effects in calculating Brillouin tensors of LiNbO3 crystals. After careful design and adjustment of the experiment system. Brillouin spectra of LiNbO3 crystals were measured in the 90° scattering scheme. We measured all independent elastic and piezoelectric constants of LiNbO3 crystals made in China in the hypersonic region. The spatial were also measured in the 180?back scattering scheme. Experimental results are in good agreement with calculations.

本文在计算3m晶体的布里渊张量时,不仅考虑弹光效应,且同时计及了局部转动效应和电光效应.经过对实验系统的设计和调整,用90°散射测量了3m晶体LiNbO_3的布里渊谱,得到了LiNbO_3晶体在特超声频率下的所有独立的弹性常数和压电常数,据以计算了慢度曲线.用180°散射测量了LiNbO_3晶体的有关声速,实验结果与计算曲线一致.

Recently we have investigated two-dimensional generalized Green's functions for surface excitation in a half space of piezoelectric crystal. In this paper, the SAW part of generalized Green's functions are discussed in detail. On using the method of stationary phase, the asymptotic behavier of SAW far fields is obtained. But, since such asymptotic solutions near the turning points of slowness curve fail, the general asymptotic solutions expressed by a varied Airy function are developed. And the joining problem...

Recently we have investigated two-dimensional generalized Green's functions for surface excitation in a half space of piezoelectric crystal. In this paper, the SAW part of generalized Green's functions are discussed in detail. On using the method of stationary phase, the asymptotic behavier of SAW far fields is obtained. But, since such asymptotic solutions near the turning points of slowness curve fail, the general asymptotic solutions expressed by a varied Airy function are developed. And the joining problem of solutions near the turning points can be resolved.

最近,我们研究了在压电晶体半空间表面激发的二维广义Green函数。在本文将仔细讨论广义Green函数的表面波部分。用稳相法给出声表面波远场渐近解。但是由于这样的渐近解在接近慢度曲线的拐点处失效,我们发展了用变型Airy函数表示的普适渐近解,从而解决了在拐点附近的解的衔接问题。对于Y切LINbO_3,进行了声表面波Green函数分量和功率流密度的数值计算,结果表明在Y切LiNbO_3的Z方向上出现聚焦现象.

 
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