ID 原文 译文
55517 利用单个拉伸电磁矢量传感器提供一维孔径扩展,再利用垂直于该拉伸电磁矢量传感器的单个电偶极子实现另一维的孔径扩展。 Using a single stretch electromagnetic vector sensor provides a one-dimensional aperture extension, recycling is perpendicular to the tensile electromagnetic vector sensor with single electric dipole of aperture extension of another dimension.
55518 针对该两维孔径扩展阵列,提出一种矢量叉积算法与相位干涉法相结合的算法来获取两维波达方向的高精度估计。 For the two dimensional array aperture extension, presents a vector cross product algorithm and the algorithm of phase interference method to obtain two high accuracy estimation of doa.
55519 所提阵列在降低互耦的同时,利用电磁矢量传感器提供的极化分集与两维孔径扩展带来的空间分集,使得两维波达方向估计精度大大提高。 The proposed array to reduce the mutual coupling at the same time, using the electromagnetic vector sensor with polarization diversity and two dimensional aperture extension of space diversity, make two dimensional doa estimation precision is greatly increased.
55520 针对我国嫦娥二号卫星拓展任务需求,研究了卫星由日地L2点向L1点的转移轨道方案。基于卫星真实星历,考虑各种摄动因素,借助不变流形理论和微分修正方法,设计了嫦娥二号在日地平动点L1和L2之间的转移轨道,提出了便于理解和工程应用的平动点间直接转移方式,研究了真实力模型下平动点Lissajous轨道的不变流形转移方式,对比了两种转移方式的出发速度增量、转移时间与出发时刻的关系。 Chang 'e 2 satellite development in China, mission requirements, studied the satellite by day to L2 points to L1 transfer orbit. Based on real satellite ephemeris, considering all kinds of perturbation factors, with the aid of invariant manifold theory and differential correction method, designed the chang 'e 2 in solar-terrestrial translational point between L1 and L2 transfer orbit, put forward to facilitate understanding and application of direct transfer between translational point, studies the translational point Lissajous orbit under real force model of invariant manifold transfer way, compares the two transfer modes of the velocity increment, transfer time and departure time.
55521 研究表明,嫦娥二号可以通过直接转移方式或者借助不变流形进入日地L1点Lissajous轨道,直接转移方式下有42天出发机会,基于不变流形方式下最短转移时间为210天,对应速度增量5.776m/s,最小速度增量可达0.024m/s。 Studies have shown that chang 'e 2 can directly transfer way or with the aid of invariant manifold enter day L1 point Lissajous orbit, start directly transfer mode has 42 days, based on the invariant manifold ways under the shortest transfer time is 210 days, corresponding increment speed 5. 776 m/s, minimum speed increment of 0. 024 m/s.
55522 研究结果可直接应用于我国嫦娥二号拓展任务的轨道设计与控制,并为我国后续平动点等深空探测任务提供有益借鉴。 The results can be directly applied to the chang 'e 2 development orbit design and control of task, and for subsequent translational point in our country such as useful references for deep space missions.
55523 针对频率选择表面(frequency selective surface,FSS)加工中存在随机误差的问题,基于多元正态分布建立了存在随机加工误差的FSS分析理论模型,给出了FSS传输系数的数学期望计算公式,以及矩形面积等效、基于误差函数级数表达式的密度曲线积分和随机样本均值3种求解方法,并采用多维自适应采样方法加速的谱域矩量法分析了随机误差对FSS电磁特性的影响。 For frequency selective surfaces (frequency selective surface, FSS) problems existed in the processing of random error, based on the multivariate normal distribution theory of FSS with random processing error analysis model, the mathematical expectation of FSS transmission coefficient formula is given, and the equivalent rectangle area, based on the error function series expression of density curve integral and random sample mean three solving methods, and USES the multidimensional spectrum domain adaptive sampling method to accelerate the moment method analysis the random error's influence on the electromagnetic characteristics of FSS.
55524 以缝隙型圆环单元为例验证了算法的准确性和收敛性,详细分析了加工误差对FSS传输性能的影响。 Aperture rings unit as an example is given to demonstrate the accuracy and convergence of the algorithm, a detailed analysis of the influence of processing error of FSS transmission performance.
55525 结果表明,随着随机误差标准差的增大,FSS的电性能变差,单元尺寸和介电常数的随机误差是影响结构性能的主要因素。 The results show that with the increase of the standard deviation of random error, the performance of FSS, cell size and dielectric constant of random error is the main factors influencing the structure performance.
55526 当变量间存在多重相关性时,常采用偏最小二乘(partial least squares,PLS)回归进行建模。 When there are multiple correlation among variables, often using partial least squares (partial further squares, PLS) regression modeling.