远场

射频激励板条波导CO2激光器远场空间压缩单峰输出模式的研究

RF-excited slab waveguide CO_2 laser with the far field intensity distribution of a single suppressed peak

近场散射与远场RCS的链条关系式

Chain Relation of the Near Field Scattering and Far Field RCS

利用远场P波波形确定1974年新疆乌恰地震的震源参数

Determination of the source parameters of the Wuqia earthquake in Xinjiang from far field P-waveform

讨论利用MATLAB分别模拟菲涅耳衍射的近场和远场情况。

Near-field and far-field Fresnel diffraction during MATLAB simulation are discussed respectively .

三列阵射频波导CO2激光器的远场特性研究

Far-field characteristics of 3-channel radio-frequency excited waveguide CO_2 laser

利用CCD准确测量激光远场发散角

Exact measurement of the far field divergence of the laser beam using CCD camera

Ω。原则上该数据是由给定的远场数据和vn通过解一个积分方程得到的。

Theoretically , these data should be solved from the far-field pattern from an integral equation with hyper-singularity .

结果表明，在地空通信中，透射波乃是路径传播的主波，lateral波在高空的远场问题中可以忽略。

The results reveal that the transmissive wave is the dominant wave for path propagation in ground-sky communication .

用MATLAB开发的FDTD系统研究电磁散射远场特性

Study on Far field Characteristics of Electromagnetic Scattering Problems with FDTD System Based on MATLAB Plane

针对AES密码芯片的远场相关性电磁分析攻击

Electromagnetic correlation analysis attacks on microcontroller implementations of AES in far field

研究了抛物方程（PE）远场近似条件及起始场的计算，得到了容许误差和最小参考距离之间的关系。

The far-field approximation of Parabolic Equation ( PE ) and the numerical calculation of PE starter are studied .

基于FDTD技术计算目标远场RCS方法的Matlab实现

Implementation of Matlab Program for Calculating the Far-field RCS of Targets based on FDTD-Algorithm Technique

使用GPS同震位移资料和远场P波记录，研究了1999年台湾集集地震震源破裂过程。

The rupture process of the 1999 Chi-Chi , Taiwan earthquake is investigated by using co_seismic surface displacement GPS observations and far field P_wave records .

同时，如果不考虑微透镜的衍射效率，当球面折射微透镜的F数越大，高斯光束经过准直变换后的远场发散角越小。

If diffractive efficiency is not considered , the numerical results show that larger f number microlens has smaller divergence angle .

本文在理论上用两维快速傅里叶变换（FFT）分析了准直中基于像传递的近远场信号对图像处理影响；

The effects of this technique on the image processing is analyzed theoretically by two dimension FFT simulation .

各向异性介质中由SH波引起的圆孔周围的远场位移

Far field displacement around a circular cavity caused by SH wave in an anisotropic medium

在求解了界面孔对SH波散射的近场解的基础上，进一步研究了其远场特性。

Base on the solutions for near-fields , the special properties for far-fields are investigated .

研究了界面任意形孔对SH波散射的远场解。

The solutions to scattering of SH-wave by an interface arbitrary-shape-cavity for far-fields are studied .

FDTD计算功率变换器近场到近/远场的转换

Transformation from Near to Near / Far-Field Technique in Analyzing EM Fields of Power Converter Using FDTD Method

满足夫琅和费远场条件的两个物体，z值大的物体将被环数少的菲涅耳波带板扫描，具有小而平直的孪生像噪声振幅；

In the far-field , the further object scanned by FZP with fewer fringes has flatter and lower amplitude of twin-image noise for reconstructed image .

采用MATLAB与VC++语言混合编程，完成了近场处理软件和远场测试系统。

Based on the mixed programming with the MATLAB language and the VC + + language , the package of near-field data processing and the far-field measurement system are designed .

加层半空间硬币形（PennyShaped）交界裂纹的弹性波散射远场散射波导分析

The scattering of elastic wave by a penny shaped interface crack in a layered half space & the analysis of scattered waveguide in far field

采用Kirchhoff方法计算点声源的远场气动噪声。

The far-field aerodynamic noise generated by a point source is calculated using the Kirchhoff ′ s method .

系统采用CCD器件作为检测的主探测器，为实现远场发散角测量，专门设计了增程组件。

This system uses CCD device as the main detector , to realize the measurement of far field and divergence angle , and design components for increasing optical path .

本文研究了一种用于冲激SAR成像处理的算法&反向投影法，该算法不同于满足远场、窄带约束条件下的常规SAR的频域成像算法。

The Back Projection Algorithm adopted in the process of impulse SAR imaging is analyzed in this paper . The algorithm is different from that of conventional SAR imaging formation .

由理论和实验研究了一维三通道空心桥脊波导列阵CO2激光器的远场输出特性，观察到三种不同模态输出的远场光强分布形状。

The far-field output characteristics of throe-channel hollow bore ridge ( HBR ) waveguide arrays CO2 laser are investigated theoretically and experimentally . The far-field patterns of three different output modes are observed .

假设粗糙面大小和整个错动面大小的比值为C，并假设破裂从中心开始，计算了不同C值对远场地震波谱的影响。

Assuming that the ratio of the asperity size to the size of whole dislocation surface is C. and the fracture begins in the center , it calculates the effect of different C-values on the far-field seismic wave spectrum .

傅立叶分析与HHT分析在场地与近远场方面变化趋势基本相似，特别能量密度谱几乎相同。

Fourier transform suits to HHT in analyzing the trends of site and distance , especially of energy density spectrum .

利用快速傅里叶变换（FFT）对这种激光器的近场、远场以及相位等模场特性进行了数值计算。

The mode characteristics of off-axis hybrid resonator including near-field intensity , far-field intensity , phase distribution are calculated by the fast Fourier transform method ( FFT ) .

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。

Two ABCD matrices for describing hard apertured Gaussian beams weakly diffracted in the far field are defined .