分析了电波的地波绕射传播、视距传播、散射传播和波导传播等四种传播模式，根据ITU - R和GZB建议的模型分别计算了各传播模式的基本传输损耗。
Four propagation models of diffraction, line-of-sight, scatting and duct are analyzed. The basic transmission loss for each of the models is calculated according to the ITU-R model and GZB model.
复射线理论为高频电磁波在各种复杂环境中的传播和散射提供了一种简便而有效的分析方法。
The complex ray theory provides a simple and useful approach to analyze the propagation and scattering of HF EM waves in various complicated environments.
激光经过被测表面反射和散射后，通过自由空间传播至观察面上形成散斑图像，其统计分布依赖于被测表面的微观形貌。
Speckle images are produced by the reflected and scattered light beams from rough surface through free-space to observing plane when laser illuminates the object surface.
根据这种观点，多层介质波导中波的传播和散射可以归结为多维空间向量的坐标变换，并可用传输线和网络表示。
According to this point of view the transmission and scattering in multilayer dielectric waveguides can be regarded as coordinate transformation of a vector in ann-dimensional vector space.
本文从坐标变换观点出发，给出分析多层介质波导中电磁波传播和散射的一种新的技术。
We present here a new technique for the analysis of the transmission and scattering in multilayer dielectric waveguides from the point of view of coordinate transformation.
选择的标准之一飞溅刷子刷散射和调整，以模仿自然传播生锈。
Select one of the standard Spatter brushes and adjust brush scattering to imitate the natural spreading of rust.
脉冲线电流源的辐射问题是研究高功率微波辐射、传播和散射问题的基础。
The electromagnetic pulse radiation problem is the starting point for high power microwaves radiation, propagation and scattering.
提出激光在强散射介质中传播的空间分布模型，对压缩照射进行了理论分析。
The space distribution model of laser propagation in strong scattering medium is advanced. The theoretical analysis for the press irradiation is made.
最后，模拟了柱面波在自由空间中的传播及空心圆柱体在柱面波入射下的近场和远场散射特性。
In the end, the propagation of cylindrical wave in free space, and the hollow cylinder scattering characteristics in near field and far field is completed when it is initiated by cylindrical wave.
为从无偏振混浊介质背向散射光确定散射光学参数，设计了倾斜入射的模拟光路以及用复合反向传播神经网络求解的方案。
To determine the optical parameters of turbid media with an unpolarized backscattering light an oblique incidence geometry with the compound bp neural network has been designed.
在小尺度封闭空间内，声波低频成分的波长与空间尺寸相当，声音在传播过程中所发生的散射、衍射等波动现象不容忽视。
Because of wavelength of sound at low frequencies being close to the dimensions of small enclosures, scattering and diffraction in the course of sound radiation can not be ignored.
本文报道了近年来我国在生物组织超声特性——传播速度、衰减、吸收、反射、散射和非线性声参量方面的研究进展情况。
We reported the main progress made in China in recent years of the study of ultrasonic tissue characterization-propagation velocity, attenuation, scattering and nonlinearity parameter, etc.
本文通过求解雷达散射截面得到了无源电磁散射板应用于微波接力通信中的电磁波传播参数。
Electromagnetic wave propagation parameters of passive scattering planes used in microwave radio relays are given by applying the method of solving the radar cross section (RCS).
将由一维波导通过结点组装成的空间结构的振动作为波动研究，波沿波导传播，并在结点处反射、散射。
Vibration of structures assembled from one dimensional waveguides is studied as wave motion in this paper. Waves propagate along the waveguides and reflect, scatter at the junctions.
断层广泛存在于地壳中，作为场地条件影响地震波的传播，研究断层对弹性波散射的影响对理论研究和工程应用均有十分重要的意义。
Faults are widely existed in crust. They effect the elastic wave scattering as site condition. The analysis of wave propagation by fault is important both in theory and engineering.
根据多重散射的解析理论，利用粒子跟踪法研究了毫米波在离散随机介质中的传播与散射。
Based on the analytical theory of multiple scattering, the millimeter wave propagation and scattering in discrete random media were investigated by means of the particle-tracking method.
弹性波在含有孔洞、裂纹或界面等障碍物的结构中传播时，会在它们附近发生散射，导致散射体附近产生动应力集中。
When elastic waves propagate in structures with obstacles such as cutouts, cracks or interfaces and so on, wave scattering and dynamic stress concentration can occur near these scatterers.
并用短时傅立叶变换分析了声波传播过程中晶粒散射波的频谱特性。获得了一些有用结果。
We also use short time Fourier transforms to analyze the spectrum of the scattered wave during the propagation process, and obtain some useful results.
在全向发射不同接收指向条件下推导出散射面积计算公式，考察了此时椭圆环上的散射面积、散射强度、传播损失与接收角之间的关系。
The relationship of the scattering area, the scattering intensity, the transmit loss and the directivity of the beam with the received angle in the same condition is studied.
其中主要为无线衰落信道中的多径传播和散射引起的信号衰落，以及大的多径时延而引起的符号间干扰。
The problems mainly exhibit to be multi-path propagation in the wireless fading channel, signal fading caused by the scattering and Inter-Symbol Interference caused by the long multi-path time delay.
不存在相干的反射能量，能量向各个方向散射，包括传播方向的后方。
No coherent reflected energy can be identified and the energy is scattered in all directions, including back in the direction from which it came.
本文把求解半空间散射问题的FDTD技术与地波传播理论相结合，研究任意复杂目标的地波散射特性。
In this paper, the ground wave scattering from a complex target is investigated by combining the FDTD technique of solving the semi-space scattering problem with the theory of ground wave propagation.
典型的室内传播信道为莱斯衰落信道，可将其分解为LOS传播信道和散射信道。
Typical indoor wireless channel is Ricean fading, and can be decomposed into the sum of an LOS propagation channel and a scattering channel.
在光线传播的简化过程中，产生了多重散射和单向散射两种理论。
There are multiple scattering theories and single scattering theories in the process of light propagation.
为从无偏振混浊介质背向散射光确定散射光学参数，设计了倾斜入射的模拟光路以及用复合反向传播神经网络求解的方案。
To determine the optical parameters of turbid media with an unpolarized backscattering light, an oblique incidence geometry with the compound BP neural network has been designed.
另一部分则是由于声波在不均匀介质中的声散射把能量散射到其他方向，而使原来传播方向上的声波能量减弱。
The dispersion is due to the inhomogeneity of medium, which will lead the energy of sound to deviate from its direction of propagation.
二利用辛几何理论求解电磁波在二维凹面体散射中的传播问题，与经典的GO解比较，特别在焦散区得到较理想的场解。
Second, solve electromagnetic wave propagation of two-dimension concave objects by symplectic Geometrical Theory, and get better field solutions in caustic field2)comparing with classical GO method.
二利用辛几何理论求解电磁波在二维凹面体散射中的传播问题，与经典的GO解比较，特别在焦散区得到较理想的场解。
Second, solve electromagnetic wave propagation of two-dimension concave objects by symplectic Geometrical Theory, and get better field solutions in caustic field2)comparing with classical GO method.
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