ID 原文 译文
13934 同时, 还利用抛物方程方法对不同折射条件下的ADS-B信号传播进行了仿真, 仿真的地空传播衰落特征与实测数据有较好的一致性。 Meanwhile, we use the parabolic equation method to simulate the propagation of the airborne ADS-B signal in different refractive conditions, and the compared result shows that the measured data and the simulated ones have a great agreement.
13935 分析结果表明, 利用机载ADS-B信号取得的地空传播试验数据是可靠的, 这对今后利用ADS-B信号积累传播数据, 改进传播预测模型具有重要意义。 The result of analysis indicates that the experimental data of ground-air propagation obtained by ADS-B signal is reliable, and are of great significance for the future use of ADS-B signal to accumulate the propagation data and will improve the propagation model.
13936 研究了双圈圆阵在两种不同放置情况下的方向特性, 主要包括阵列方向图的指向、主瓣波束宽度和副瓣峰值电平等。 In this paper, the directional characteristics of two different placed dual circular arrays are studied, including the direction of radiation pattern, the beam width of the main lobe and the sidelobe level.
13937 首先, 建立了双圈圆阵的阵列模型, 推导方向图公式并推广到多圈圆阵的情况, 随后对其进行了理论分析。 Firstly, the array model of the dual circular array is established, the formula of the radiation pattern is deduced and extended to multi-circle circular array, and theoretical analysis is carried out.
13938 其次, 通过大量仿真实验, 分析了主瓣的半功率点波束宽度和副瓣峰值电平以及扫描角分别与内、外圈阵元数以及内、外圈阵元半径之间的关系。 Secondly, a large number of simulation experiments are carried out by MATLAB software to analyze the relationship among the half-power beamwidth of the main lobe, the sidelobe peak level, the scanning angle and the number of array elements, as well as the relationship between the radius of the inner and outer elements.
13939 最后, 对理论分析和仿真结果进行综合梳理, 发现在阵元内、外半径之比为0.5左右时副瓣电平最低, 波束宽度会随着内圈阵元数增大而增大, 随外圈阵元数增大而减小等结论。 Finally, the theoretical analysis and simulation results are comprehensively sorted out.The conclusions are that the lowest level of the sidelobe exists when the radius ratio of inner and outer array is about 0.5, and the beamwidth increases with the number of inner circular array elements but decreases with the number of outer circular array elements.
13940 实验结果可为实际工程应用中合理设置阵元数目以及阵元位置提供理论参考。 The experimental results can provide theoretical reference for the reasonable setting of the number of elements and the location of the array elements.
13941 为了解决编队目标精细跟踪的难题，提出一种基于距离向量的编队目标灰色精细跟踪算法。 In order to solve the problem of refined tracking for formation targets a gray refined tracking algorithm based on distance vector is proposed．
13942 首先提取点迹和编队个体航迹的距离信息建立距离向量。 Firstly, the distance between the points and the tracks of the individuals in the formation is extracted to build the distance vector.
13943 然后基于距离向量形成多个点航映射组合。 Secondly, multiple combinations of point /track mapping are established based on the distance vector.