ID 原文 译文
13884 文中结果能为第三代北斗导航卫星系统在评估空间天气威胁方面提供借鉴和参考。 The results of this article can be used as a reference to evaluate space weather threat to Beidou 3 for engineers.
13885 一发两收配置下双基地高频地波雷达相对于单基地雷达的优势为提高探测精度和目标截获能力。 Bistatic high-frequency surface wave radar (HFSWR) improves the detection accuracy and target intercept capability through the bistatic information fusion.
13886 同时, 双基地高频地波雷达作为一种大型的雷达探测系统, 影响其探测性能的因素众多, 为双基地高频雷达探测性能建立一套有效的评估体系, 对于雷达初期建设与使用过程中的维护与升级, 都具有重要的指导意义。 Meanwhile, as a large and complex system, many factors have impact on detection performance of bistatic HFSWR. So establishing an effective evaluation system has an important guiding significance for the construction and using of bistatic HFSWR.
13887 本文结合高频地波雷达和双基地雷达各自特点, 提出了一种基于粒子群算法改进的层次分析法, 克服了传统层次分析法的判断矩阵和一致性检测分离的缺点, 提高了评估方法的可信度与可靠性, 为双基地高频地波雷达探测性能评估提供了一种较为可靠的方法。 Based on the characteristics of HFSWR and bistatic radar, an improved analytic hierarchy process (AHP) based on particle swarm optimization (PSO) is proposed to overcome the shortcomings of the traditional AHP. The proposed method is more stable and provides a more reliable method for the evaluation of bistatic radar.
13888 在无线电视距工程应用中, 常用等效地球半径因子表征大气折射的影响。 In the engineering applications of radio line-of-sight distance, the effective earth radius factor is usually used to characterize the influence of the atmospheric refraction on radio wave propagation.
13889 为深入分析我国不同区域大气折射对无线电视距的影响, 定义了一种无线电视距因子, 以表征无线电视距相对标准大气视距的变化。 For deeply analyzing the impact of the atmospheric refraction on radio line-of-sight propagation in different regions of China, a radio horizon distance factor is defined in this paper, which can be utilized to characterize the variations of the radio line-of-sight distance relative to the one of standard atmosphere.
13890 基于我国区域近地面65m高度大气折射率梯度数据, 得到了不同时间概率下我国区域无线电视距因子的时空分布, 结合拉萨、重庆、厦门、渤海湾、西沙、乌鲁木齐典型地区无线电视距因子的时间概率分布和季节变化, 分析给出了我国区域无线电视距因子的时空分布特征。 Based on the atmospheric refractivity gradient data in the lowest 65 mnear the ground in China, the statistics of the radio line-of-sight distance factor are obtained in China with the annual and monthly values exceeded for different percentages of time, the characteristics of temporal and spatial variations are analyzed with the data mentioned above and interpolated in the typical area such as Lasa, Chongqing, Xiamen, Bohai Gulf, Xisha and Urumqi.
13891 分析结果表明, 我国不同地域无线电视距存在显著的时空变化, 并可导致无线电系统最大覆盖区域的显著时空变化。 The results show that there are significant temporal and spatial variations of the radio horizon distance factor in different areas of China, which may cause significant temporal and spatial variations of the coverage performance of radio systems.
13892 这些结果可为我国不同区域无线电系统设计和覆盖性能评估等提供参考依据。 The results are very important for the design and coverage performance evaluation of radio systems used in different areas of China.
13893 为减小波导窄边裂缝天线缝隙间互耦对天线性能的影响, 实现低副瓣的设计, 提出了一种倾角波动分布的设计方法。 To decrease the influence of mutual coupling between the slots of waveguide narrow wall slot antenna and implement the design of low sidelobe level, a design method of the wave distribution of inclined angles is proposed.