建立了试验远场涡流检测系统。
The far field eddy current testing system for trial was developed.
远场涡流缺陷重构属于电磁逆问题范畴。
Defect reconstruction of remote field eddy current belonged to electromagnetic inverse problem.
传播方式分近场和远场；
远场边界条件由无穷远处的条件近似代替。
The boundary condition at farfield is approximated by that at infinite.
文中给出了圆孔周围的远场位移的数值结果。
Results of far field displacement around a circular cavity are given.
缩比模型计算既适用于近场，也适用于远场。
The computing method using scaling model can be applied to both far field and near field.
实现了用远场掩模法对单模光纤模场直径的测量。
Therefore, measurement of mode field diameter of single mode fibers by far-field mask is realized.
光束模式展开法可用于近似计算远场的弱截断光束。
The beam expansion method is suited to approximate the weakly truncated beams in the far field.
验证电磁场影像及场型特性在近场与远场中之差异。
Verification of differences of characteristics of electromagnetic field image and radiation pattern in the near and far field are demonstrated.
本文就远场涡流检测设备、方法及机理作简要介绍。
Remote field eddy current testing equipment, method and principle are briefly described.
推导出了此类换能器的远场指向性和近场声压的表达式。
The eXpression of directivity of far field and near field was derived.
最后对其散射远场声压的空间分布特性进行了数值计算。
Finally, the space distribution characteristic of scattered far-field pressure was calculated and plotted numerically.
提出了一种基于远场近似法建立的大气风场测量散射模型。
A backscatter model was developed for measuring wind field with far-field approximation method.
衍射理论的另一个重要应用就是研究准直光束的远场发散角。
Another important application of diffraction theory is the study of the far field divergence Angle of a collimated light beam.
讨论从测量远场辐射花样入手来鉴别回旋管的输出成份问题。
The identification of mode compositions of gyrotron output power is discussed by using far-field radiation pattern analysis.
讨论环形孔径高斯光束的远场光斑能量分布，并给出拟合表达式。
The energy distribution of far field spot for annular aperture Gaussian beam is discussed and the fitting expression is given.
文章着重研究了反射系数的计算，还给出了远场的辐射型式曲线。
The calculation of the reflection coefficient is emphasized, and the polar plots of the radiation coefficient are also presented.
计算和实验都表明复式激励远场涡流探头极大地改善了探头特性。
Both calculations and experimental measurements for the dual excitation probe show that great improvement in the probe are obtained.
讨论了远场压应力在裂纹周边附近产生的局部拉应力场的应力情况。
Discussed the stress condition of periphery crack's local tension stress field created by compressing stress in far field.
链条关系式在目标特性研究、远场和近场散射测量等方面有重要意义。
The Chain Relation is meaningful in the research on target character, the far-field and near-field scattering measurement.
为了保证远场信号的相位与激振力的相位一致，应当控制激振力的相位。
Output force phase should be controlled so as to get the far field signal inphase with the output force phase.
以很多小段赫芝偶极之完整电磁场合成一任意线电流之近场与远场电磁场。
The near and far electromagnetic field are synthesized by summation of the electromagnetic field of short current segments or Hertz dipoles.
研究了含中心裂纹的正交各向异性板，在远场均匀热流作用下温度场的分布。
The temperature fields for an orthotropic plate with a central crack under the remote uniform heat flows are investigated.
利用远场时变散斑空-时强度相关函致的有限差商可以测量散射体运动的二维速度矢量。
By using backward difference of space-time intensity correlation function with respect to time delay, the two-dimensional velocity vector of a moving diffuser can be measured.
本文提出了一种新的基于单元电流重构的平面近远场变换方法，给出了该方法的基本原理。
A method for planar near field to far field transformation based on element current reconstruction is presented and the basic principle of this method is given.
该方法可直接获得导向矢量的闭式估计，并且该方法可适用于阵列远场、近场接收信号模型。
This method can obtain the estimation of the steering vector directly and is adaptive to both far field and near field models.
远场涡流技术结合计算机技术和有限元分析方法，解决了在役铁磁性材料换热器管检验的问题。
Remote field eddy current technique combined with computer technique and finite element analysis was used to examine the inservice ferromagnetic heat exchanger tubing.
文中基于子空间类测向方法，在远场情况下，提出了一种新的估计阵元位置误差的有源校正算法。
In the case of far field sources, based on the subspace direction-finding technique, a new method for active calibration of array shape is presented.
作者从断裂力学观点研究了圆盘形纯剪切破裂产生的远场位移，导出了远场位移的解析表达式。
From the point of view of fracture mechanics, we studied the far displacement field produced by a disk-shaped pure shear fracture and obtained an analytic expression for that field.
作者从断裂力学观点研究了圆盘形纯剪切破裂产生的远场位移，导出了远场位移的解析表达式。
From the point of view of fracture mechanics, we studied the far displacement field produced by a disk-shaped pure shear fracture and obtained an analytic expression for that field.
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