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辐射问题
相关语句
  radiation problem
    New numerical method on the inverse black body radiation problem
    黑体辐射问题的新数值方法(英文)
短句来源
    Solving EM Scattering Problem of Dielectric-Filled Apertures and Radiation Problem of Dielectric Sealed Waveguide End by Edge-based FEM
    矢量有限元法求解介质填充缝隙散射和介质密封波导口辐射问题
短句来源
    With these backgrounds, the object being investigated in this article is composite metallic and dielectric structure which is composed by piecewise homogeneous, linear and isotropic medium, the problem being investigated is the complex scattering and radiation problem, the intention being investigated is modeling and fast computing the electromagnetic characteristic of electric large complex structures with uniform method, the final objective is developing general fast electromagnetic computing software to solve the realize electromagnetic computing problems in engineering.
    本文就是围绕这一背景展开的,研究对象是由分块连续、线性、各向同性媒质组成的“金属与介质混合结构”,研究问题是复杂的散射和辐射问题,研究目标是以统一的方法对电大尺寸复杂结构作电磁建模与快速计算,最终目的是开发通用的电磁计算程序,来解决一些工程中的复杂电磁计算问题。
短句来源
    Because of the large advantage in the analysis of electromagnetic scattering and radiation problem, using the time domain integral equation (TDIE) solving every structure of objects’scattering become to an important direction in Computation Electromagnetics, But The classical MOT(marching-on-in-time)-based TDIE solvers have a drawback: the late time stability problems.
    由于时域积分方程对于分析电磁散射、辐射问题有着无可比拟的优势,利用时域积分方程求解各种结构体目标散射成为计算电磁学领域中一个非常重要的方向。 但是传统的时间步进法求解时域积分方程存在致命缺点:后时稳定性不好。
短句来源
    This paper applies the generalised deviation principle to the inverse study of the black body radiation problem and provides a selection method of regularization parameter. It is known through theresults of computer simulation that the computation accuracy is high and application perspective is good.
    应用广义偏离原则对黑体辐射问题进行了反演的研究,给出了正则参数的选择方法,由计算机仿真结果知,该方法计算精度高,有良好的应用前景。
短句来源
更多       
  radiation problems
    Study on EM pulse radiation problems with time domain MEI method
    用MEI方法研究脉冲线源辐射问题
短句来源
    A modal analysis for the acoustic radiation problems: Ⅱ. Examples
    声辐射问题中的模态分析,Ⅱ.实例
短句来源
    A modal analysis for the acoustic radiation problems: Ⅰ. Theory
    声辐射问题中的模态分析:I理论
短句来源
    A modal analysis for the acoustic radiation problems:Ⅲ. Reconstruction of acoustic fields
    声辐射问题中的模态分析:Ⅲ.声场重构
短句来源
    Volakis have studied a series of electromagnetic scattering and radiation problems using hybrid techniques based on edge-based FEM.
    Volakis等应用该方法与其它求解方法相结合的混合技术,分析了一系列电磁散射与辐射问题,使Edge-based FEM得到日益广泛的应用。
短句来源
  “辐射问题”译为未确定词的双语例句
    Semi-Classical Theory of Radiation of Single Frequency
    用半经典理论处理单一频率辐射问题
短句来源
    Questions of Radiation of Absolute Blackbody
    绝对黑体辐射问题
短句来源
    Research on teaching the Question of Radiation of Electric Dipole
    电偶极子辐射问题的教法研究
短句来源
    The Applications of the Closed Orbit theory to the Spontaneous Emission of Atoms in a Dielectric Slab
    闭合轨道理论在二层介质中原子自发辐射问题上的应用
短句来源
    RADIATION FROM A LINEAR MONOPOLE ANTENNA AT THE TIP OF A METALLIC PROLATE SPHEROID
    长金属椭球体顶点处线形单极子天线的辐射问题
短句来源
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  radiation problem
The apparent mass and damping coefficients of the radiation problem and the reflection coefficient of the problem of scattering of an impinging wave by a floating body are calculated.
      
This paper inquires into the feasibility of the solution to the wave diffraction and radiation problem in the case of critical loading.
      
It is shown that the diffraction problem always has a solution while the radiation problem may have no solution.
      
Inverse radiation problem of boundary incident radiation heat flux in semitransparent planar slab with semitransparent boundarie
      
Inverse radiation problem in one-dimensional semitransparent plane-parallel media
      
更多          
  radiation problems
It is thus concluded that scattering problems can be transformed into specific radiation problems where the radiated source of known distribution is located at infinity.
      
A frequency extrapolation technique for computing antenna-platform radiation problems
      
A frequency extrapolation technique is proposed to obtain the broad band radiation patterns of antenna-platform radiation problems.
      
The algorithm is applied to several 2D and 3D antenna-platform radiation problems.
      
By applying the radiation-to-scattering transform, the scattering problem can be considered as the specific radiation problems where the radiated source equivalent to the electromagnetic plane wave is located at infinity.
      
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The radiation of a thin linear monopole antenna of any length erected at the tip and along the axis of a metallic spheroid of any length and eccentricity is analized. The monopole is excited at its base. General expressions for the fields are obtained.

本文分析了竖立在任意长的和任意偏心率的长金属椭球体的顶点上一个与椭球体同轴的并且底馈电的细线形单极子天线的辐射问题,获得了辐射场的普遍表示式。

In this paper, we carry out the theoretical calculation of line widths and energy shifts of spontaneous emission, the decaying oscillating field is taken instead of the free field as the action field. In the calculation the self consistent requirement is imposed.

在本文中,我们对二能级原子的自发辐射问题进行了讨论。我们用原子自发辐射的实际场代替自由场同原子相互作用,并由自洽的条件计算谱线的线宽与原子能级的移位。计算方法也不同于前人的方法。计算的能级移位不出现发散的困难。

The problem of how to emit the sound energy convergently in an unbounded uniform medium has been solved in terms of the directivity index. Coherent source is used to focus radiation energy in the shallow stratified medium. The main results are given as follows:(1) In a homogeneous layer, the coherent source retains waveguide propagation from Weston's B-region to C-region;(2) In a negative gradient layer, it provides significant convergence gain as the focus depth of the source insonifies shallow target;(3) In...

The problem of how to emit the sound energy convergently in an unbounded uniform medium has been solved in terms of the directivity index. Coherent source is used to focus radiation energy in the shallow stratified medium. The main results are given as follows:(1) In a homogeneous layer, the coherent source retains waveguide propagation from Weston's B-region to C-region;(2) In a negative gradient layer, it provides significant convergence gain as the focus depth of the source insonifies shallow target;(3) In a negative thermocline layer, the powers rushing the jump domain and bounding under layer waves by coherent source are higher than that by point source.In addition, with three common sonar systems as illustrations, we calculate relative correlation gains of coherent sound sources.

在无限均匀介质中,能量集中辐射问题已在“指向性”的几何概念下解决。而在浅海分层介质中,能量集中辐射自然是与浅海传播算子相匹配的相干辐射。 本文就三种典型水文条件分析了垂直线形相干声源的相干辐射增益: 1.在均匀层,Weston C区内,相干辐射增益是每10倍程5dB,相当于相干声源在Weston B区和Weston C区保持波导传播; 2.在负梯度,当相干声源的聚焦深度对准浅处目标,可以获得显著的相干辐射增益; 3.在负跃层,相干辐射穿透跃层和束缚层下波的能力显著强于点源辐射的相应能力; 4.相干声源无单程相关损失。

 
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