| ID | 原文 | 译文 |
| 13904 | 将两者结合起来的一种二维三维 (2D/3D) 混合时域不连续伽辽金 (discontinuous Galerkin time domain, DGTD) 方法可以兼顾精度与效率, 有效地处理这类电磁全波计算问题。 | A hybrid 2D/3 Ddiscontinuous Galerkin time domain (DGTD) method has advantage on both accuracy and efficiency, thus is effective to cope with such full wave simulations. |
| 13905 | 其中二维、三维方法采用同一套三棱柱离散的网格, 通过适当设置基函数, 二维区域与二维区域之间可以方便快速地相互转化。 | The 2D and 3Ddomains share the same triangular prism mesh. With appropriated basis functions, different domains can couple with each other efficiently. |
| 13906 | 随着电磁波的传播, 二维、三维的适用区域是随时间、空间动态变化的。 | As the electromagnetic wave propagates, the 2D/3D domain decomposition is dependent both on space and time. |
| 13907 | 为了准确地捕捉这种动态变化, 文中提出的一种改进的自适应判据, 在每个时间歩对电磁场进行检测, 从而动态地判定二维简化区域。 | This work proposes an improved adaptive criterion which monitors the field at every time step, thus updates the 2D/3D domain dynamically. |
| 13908 | 与现有技术的判据控制绝对误差不同, 该方法对相对误差进行控制, 效率高、精度好, 对于不同的结构适应性强。 | Unlike the state-of-the-art technique controlling absolute error, the proposed criterion controls comparative error. This method is both high efficient and accurate, and flexible for various kinds of structures. |
| 13909 | 通过数值实验, 与商业软件和全三维 (3D) DGTD方法的结果进行了比较和验证。 | Some numerical examples are demonstrated to validate the proposed method. Comparisons with commercial software are also given. |
| 13910 | 基于93.2GHz频段下高速铁路典型高架桥场景中的通信信道测量数据, 利用射线跟踪仿真器对无线信道传播特性进行仿真, 并通过与实测数据的对比进行场景结构尺寸、收发机位置、材料介电常数等仿真器基本输入参数的校正, 实现路径损耗数据的平均误差为0.2dB, 提升了仿真器的有效性和可靠性。 | In this paper, ray tracer (RT) is applied to conduct simulation of the propagation in highspeed railway viaduct scenario at 93.2 GHz.Some basic input parameters such as geometrical dimensions of environment, positions of transmitter and receiver, permittivity of materials are calibrated based on the measurement results. The average error of path loss between simulation and measurement is calibrated to 0.2 dB, obtaining a reasonable improvement of the accuracy of RT. |
| 13911 | 利用校正后的仿真器输出结果对高架桥场景下的信道传播特性做了进一步的分析, 分别对莱斯K因子、均方根时延扩展、功率时延谱以及角度扩展进行了计算。 | The calibrated results are employed to study propagation characteristics in viaduct scenario.Rician K-factor, root-mean-square (RMS) delay spread, power delay profile and angular spread are calculated. |
| 13912 | 结果表明, 高架桥场景的特殊结构导致随着收发机距离的增大, 因此在高架桥场景下各参数数值均相对较小。 | The typical structure of viaduct and the application of horn antennas lead to a small value of each calculated parameters at each snapshot. |
| 13913 | 除此之外, 本文还利用相关性对整个场景进行了准平稳区间的划分, 并计算了一个准平稳区间内各大尺度参数间的互相关性。 | In addition, correlation between parameters are also analyzed in this paper. |