采用数值积分方法分析了圆口径天线非轴向近场分布特性。
The near-axis field distribution of circular aperture antennas is obtained by numeric integration method.
采用三维时间域有限差分（FDTD）方法研究了扫描近场光学显微镜中光纤微探针的近场分布特性。
The near field distribution of uncoated and metal coated fiber optic probes were characterized by the method of three dimensional finite difference time domain (FDTD).
进一步推导了焦斑质心位置对光束近场强度分布和相位斜率分布的依赖关系式，并对该式清晰的物理意义进行了阐述。
The centroid position of the focal spot directly depending on intensity distribution and phase slope distribution of near field is derived and its physical meaning is described.
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。
The radiation pattern in the near and far field of each frequency component of the spectrum of current pulse on a transmission line.
本文在假定单模光纤横端面上的近场为高斯分布的前提下，从理论上导出了其远场分布也是高斯分布。
In this paper, when assuming a Gaussian near field distribution on the cross section of single-mode fiber, it has been derived theoretically that the far field is also a Gaussian distribution.
和单色激光的衍射不同，宽带的飞秒光束衍射调制较小，直接利用锯齿光阑，便能获得近场光强分布相对均匀的光束。
The diffraction modulation of ultrashort pulsed-laser is less than that of CW laser, so only serrated aperture can be used to get uniform near-field uniform intensity distribution.
采用基于分布源边界点法的近场声全息技术对运转状态下的罗茨真空泵进行了噪声源识别和定位研究。
The distributed source boundary point method(DSBPM) based nearfield acoustic holography(NAH) is used for identifying and localizing noise sources of the roots vacuum pump.
利用矩形波导模型求出波导模式、放大自发辐射阈值、放大自发辐射的近场及远场光强分布。
Waveguide mode, ASE threold and near-field and far-field distribution are culcalated for a rectangle waveguide model.
截止波长测试和近场光强分布检验表明，该光子晶体光纤确实具备较宽的单模工作范围。
The measurements of the cut-off wavelength and the near field intensity distribution show that the PCF does have comparatively wide single-mode operating range.
分析发现激光束通过硬边光阑后会出现大量的强度尖峰，引起近场的强度分布不均匀。
It is found that lots of intensity spikes emerge and the near field intensities are non-uniformity when the pulses pass through the aperture.
在频域有限差分法使用上，我们用边界条件去处理金属和介质之间的边界，故能精确模拟出金属表面电浆波在近场的分布情形。
We match the boundary conditions to take care of the interface between the metal and the dielectric in the FDFD method. Thus the SP wave distribution on the metal surface can be accurately simulated.
FDTD广泛应用于研究电磁波与各种物体的相互作用，如微波、光镊、近场光学、细胞中光场分布的数值求解。
FDTD is widely used in the analysis of electromagnetic problems, such as microwave, Optical tweezers, near field optics and so on.
结果表明，EFGB聚焦后，近场光强分布变化很快，特别是焦点前后，光强分布会快速旋转。
The results show that the intensity distribution of focused EFGB change quickly, especially near the focal point, and the spot will rotates quickly.
在机身影响下，旋翼近场尾涡形状发生畸变，从而改变桨盘处的诱导速度分布。
The results show that the rotor near-wake is distorted because of the flow field of the fuselage, resulting in large variation on the induced velocity distribution at the rotor plane.
本文在假定单模光纤横端面上的近场为高斯分布的前提下，从理论上导出了其远场分布也是高斯分布。
It has been theoretically derived that the far field is also a Gaussian distribution provided that the near field on the output end face of single mode fiber is Gaussian distribution.
采用口径场法对具有高斯幅度分布的圆口径天线辐射近场进行了分析。
The near field properties of circular aperture antennas with Gaussian amplitude distribution are analyzed by the aperture field integration method in this paper.
采用口径场法对具有高斯幅度分布的圆口径天线辐射近场进行了分析。
The near field properties of circular aperture antennas with Gaussian amplitude distribution are analyzed by the aperture field integration method in this paper.
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