ID 原文 译文
13314 本文还将多层快速多极子方法(multilevel fast multipole algorithm, MLFMA)用于加速EPA中的矩矢相乘计算。 The multilevel fast multipole algorithm(MLFMA) is also used to accelerate the matrix-vector multiplication in EPA.
13315 最后通过数值算例说明了该方法的正确性和有效性。 Finally, numerical results are shown to demonstrate the accuracy and efficiency of the proposed technique.
13316 提出了一种基于多体制探测数据融合的最高可用频率(maximum usable frequency, MUF)预报方法。 A maximum usable frequency(MUF) prediction method based on data fusion is proposed.
13317 该方法基于数据融合的思想,将电离层垂测数据和斜向探测数据进行融合处理,对短波通信最大可用频率进行预报,试验结果表明,该方法能够有效提升对MUF预报的准确性,预报相对误差降低19.23%,绝对误差降低0.33 MHz。 The method integrates the ionospheric vertical and oblique sounding system data fusion to detect data from multi-sounding system, to predict the maximum usable frequency of shortwave communication, experimental results show that the method can effectively improve the accuracy of MUF prediction, relative prediction error is reduced by 19.23%, reduce the absolute error of 0.33 MHz.
13318 对比实验结果,春秋季和冬季的预报精度提升尤为明显,平均达到25%以上,夏季能达到10%以上.该方法易于工程实现,能够对短波通信选频、短波广播覆盖分析等提供准确的数据支撑。 Compared with the experimental results, the prediction accuracy in spring and autumn and winter is especially obvious, with an average of over 25% and over 10% in summer. This method is easy for engineering implementation, and can provide accurate data support for shortwave communication frequency selection and short wave broadcast coverage analysis.
13319 针对当前GNSS-R技术利用GNSS海面反射信号仅反演有效波高一个参数的不足,基于直射信号和反射信号构成的复相干场模型,建立海面相关时间与波浪的有效波高和平均波周期的映射模型,给出了基于直射信号多普勒频移、C/A码、导航数据位参数辅助的海面反射信号处理流程和方法,确立了基于GNSS海面反射信号的有效波高和平均波周期反演流程和方法,并在青岛小麦岛海洋观测站进行了岸边实验。 Aiming at the limitation that GNSS-R technique only estimates significant wave height using Global Navigation Satellite System(GNSS) reflections, a mapping model of ocean surface coherence time and significant wave height and mean wave period is established in this paper, which is based on interferometric complex field(ICF) defined by direct and reflected signals. The processing flow and method of reflection signals assisted with Doppler shift, C/A code and navigation data bits of direct signals are also given in detail. The model and algorithms of retrieving wave direction and wave period using reflections is researched, and then the multi-parameter retrieving model and algorithm is established. Finally, an experiment campaign is carried out to validate the results, the location of which is Xiaomaidao ocean observation station, Qingdao.
13320 实验结果表明,有效波高反演结果的均方误差为0.1 m,平均波周期反演结果的均方误差为0.61 s。 The experiment results prove that the root-mean-square errors of significant wave height and mean wave period are 0.1 m and 0.61 s, respectively.
13321 所提反演方法对海洋观测新技术研究和新装备制造,及其在我国北斗系统中的应用等扩展领域,都具有明显学术价值和重要意义。 The research results of this project would have significant academic value and important strategic significance for new technology research and new equipment manufacture of ocean monitoring, the applications to Beidou Navigation Satellite System and other application fields.
13322 精确给出电离层的实时变化信息对现代通信和卫星导航等系统可靠应用具有非常重要的意义。 Accurate determination of the ionospheric real-time state plays an important role in radiowave information systems such as modern communication and satellite navigation system.
13323 为提高电离层经验模型电子密度的输出精度,提出了一种基于地基GNSS和COSMIC掩星数据吸收的三维电离层电子密度重构的新方法。 To provide three-dimensional(3 D) specification of the ionosphere electron density for current conditions, a new 3 D ionospheric electron density reconstruction method is developed by data ingestion of ground-based global navigation satellite system (GNSS) and constellation observing system for meteorology, ionosphere and climate(COSMIC) occultation measurements.