The mode of propagation contains near field and far field.
传播方式分近场和远场；
Results of far field displacement around a circular cavity are given.
文中给出了圆孔周围的远场位移的数值结果。
The computing method using scaling model can be applied to both far field and near field.
缩比模型计算既适用于近场，也适用于远场。
The images of electric and magnetic field of different polarizations in the near to far field.
电流源阵列不同极向电磁场之影像在远近场中之变化。
The beam expansion method is suited to approximate the weakly truncated beams in the far field.
光束模式展开法可用于近似计算远场的弱截断光束。
It is shown that the thermal effect decreases the peak intensity and beam focusability in the far field.
结果表明：热效应使远场光束的峰值光强和可聚焦能力下降。
Output force phase should be controlled so as to get the far field signal inphase with the output force phase.
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。
Two ABCD matrices for describing hard apertured Gaussian beams weakly diffracted in the far field are defined.
定义两种描述高斯光束被硬边光阑弱衍射的远场下的光阑ABCD矩阵。
Discussed the stress condition of periphery crack's local tension stress field created by compressing stress in far field.
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。
Another important application of diffraction theory is the study of the far field divergence Angle of a collimated light beam.
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。
This method can obtain the estimation of the steering vector directly and is adaptive to both far field and near field models.
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。
The energy distribution of far field spot for annular aperture Gaussian beam is discussed and the fitting expression is given.
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。
Based on the theories of opt-mechanics scanning system and optical transmitting system, the far field scanning system is designed.
根据光机扫描系统理论和发射光学系统理论设计，完成了大口径远场扫描发射光学系统。
The radiation pattern in the near and far field of each frequency component of the spectrum of current pulse on a transmission line.
传输线线上脉波电流之频谱与分布及其各频率成份之辐射远近场型之差异。
This paper provided a new algorithm used in antenna's planar near field measurements to conduct near field and far field transformations.
本文研究了一种应用于天线平面近场测量中完成近远场变换的数值算法。
Verification of differences of characteristics of electromagnetic field image and radiation pattern in the near and far field are demonstrated.
验证电磁场影像及场型特性在近场与远场中之差异。
Starting from the propagation theory of partially coherent light, the spectrum of twisted Gaussian Schell-model beams in the far field are studied.
从部分相干光的传输理论出发，研究了被光阑衍射扭曲高斯·谢尔模型光束远场的光谱变化规律。
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.
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。
Through comparison, it shows that at the same value of frequency and size, the far field of hexagonal piston is more uniform than that of circular piston.
结果表明，与圆形、方形活塞的辐射远场相比，在声波频率、活塞面积相同条件下，六边形活塞声源的辐射远场相对比较均匀。
The influence on the growth morphology of the spherical crystal in the undercooled melt imposed by the far field flow is studied by the asymptotic method.
利用渐近分析方法研究了远场来流引起的对流对过冷熔体中球状晶体的生长形态的影响。
The method can simulate not only the radiation damping of semi-infinite soil, but also the elasticity recovery capacity of the far field media on the boundary.
该方法不但可以较好地模拟半无限地基的辐射阻尼，也能模拟远场地球介质的弹性恢复性能。
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.
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 concept of Ultra wideband radar signal is proposed, and then a time domain imaging algorithm is presented to reconstruct far field images of conducting objects.
给出超宽带雷达信号的概念，提出由超宽带雷达信号散射远场重建理想导体目标简捷的时域成像公式和实现算法。
When considered the far field test, the sample plane cannot do infinitely great, the paper has analyzed the truncation error, and proposed the error correction method.
考虑到远场测试时，取样平面不可能做的无限大，在对误差进行分析的基础上，给出了误差修正方法。
Fracture diagnosing technique is mainly classified into: direct far field fracture diagnosing, direct near well bore fracture diagnosing and indirect fracture diagnosing.
裂缝诊断的方法主要可分为：直接的远场裂缝诊断技术、直接的近井筒诊断技术、间接诊断方法。
Based on the transmitted field the characteristic of interference and sensing between two modes is investigated and point out the disciplinarian of far field two-lobe radiation patterns.
建立在光纤中传输模场的基础上，研究了两模间干涉特性和传感特性，指出了远场两瓣光斑的动态变化规律。
The far field diffractive pattern calculating formula for diffraction antenna with continuous phase structure is derived by current distribution method in antenna theory for the first time.
应用天线理论中的电流分布法，首次推导了具有连续位相结构的反射式毫米波衍射天线的远场衍射图计算公式。
The far field diffractive pattern calculating formula for diffraction antenna with continuous phase structure is derived by current distribution method in antenna theory for the first time.
应用天线理论中的电流分布法，首次推导了具有连续位相结构的反射式毫米波衍射天线的远场衍射图计算公式。
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