ID 原文 译文
48856 仿真结果表明所提算法运算量小,计算速度快,可以实时获取解析形式的控制输入修正量,而且对初始姿态存在扰动的情况具有一定的鲁棒性,运算精度较高。 The simulation results show that the proposed algorithm computational complexity is small, fast computing speed, real-time access to parse control input in the form of correction, and for the initial stance disturbance situation has certain robustness, computing precision is higher.
48857 旋转微运动引起多普勒正弦规律变化,进而影响目标逆合成孔径雷达(inverse synthetic aperture ra-dar,ISAR)成像结果。 Micro rotation movement caused by doppler sine law of change, which affect the target inverse synthetic aperture radar (inverse synthetic aperture ra - dar, ISAR) imaging results.
48858 利用散射点模型,对单个旋转微动进行了几何、回波建模,用距离-多普勒算法推导出旋转微动点成像结果。 Using scatter point model, for single rotating micro geometry, echo modeling, rotation is deduced using range - doppler algorithm micro imaging results.
48859 详细分析了旋转微动ISAR图像特征和图像形状,指出不同参数下旋转微动可形成幅度受第一类贝塞尔函数调制、方位向上等间隔分布的直线段型、直线点列型、条带型以及点阵型图像,并给出了以上图像的形成条件。 Detailed analysis of the characteristics and image rotation micro ISAR image shape, points out that the rotation micro under different parameters can be formed by the first kind Bessel function modulation amplitude, bearing up interval distribution of straight line type, such as straight line points column type, strip type and formation of image, and the forming conditions of the above image is given.
48860 仿真实验和实测数据均验证了理论分析的正确性,研究结果为方位向调制形成二维ISAR干扰提供理论支撑。 Simulation results and the measured data are verified the correctness of the theoretical analysis, the results provide orientation to form a two-dimensional ISAR jamming modulation theory support.
48861 针对模糊聚类算法对点数据集聚类的敏感性以及区间类型数据聚类效果不明显等问题,提出了基于二次型距离改进的模糊可能性c均值(fuzzy-possibilistic c-means,FPCM)聚类算法。 In view of the fuzzy clustering algorithm for the sensitivity of the point data aggregation class and interval type data clustering effect is not obvious, is proposed based on quadratic distance improvement possibility fuzzy c-means (fuzzy possibilistic c - means, FPCM) clustering algorithm.
48862 首先分析了区间数据的特征,引入了区间值的数学表示方法,在此基础上提出了3种不同的基于区间数据距离度量方法以及相应权重矩阵的计算方法,通过建立拉格朗日方程对目标方程优化,求得聚类中心、隶属度以及可能性迭代方程,并证明目标方程的收敛性,最后给出了算法执行步骤。 Firstly analyzed the characteristics of the interval data, introduces the mathematical representation of interval value, on the basis of this puts forward three different distance measurement method based on interval data and corresponding weight matrix and the calculation method of through the establishment of Lagrange equation optimization target equation, obtained by clustering center, membership degree and possibility iterative equation, and prove the convergence of the iterative target equation, finally gives the algorithm implementation steps.
48863 在不同类型的数据集上实验,证明算法在点数据集和区间数据集上都具有较好聚类性能.。 Experiments on different types of data sets that algorithm on point data set and interval data set has better clustering performance.
48864 远程轨道转移与近程交会是空间交会任务的2个重要阶段,前后衔接,但研究模型不同,任务约束要求差异很大,经常只能分别优化设计。 Remote orbit transfer and short-range SEC are two important stages of rendezvous missions, continuity, but the model is different, the restrictions of the task difference is very big, often can only design optimization, respectively.
48865 研究摄动情况下的有限推力轨道转移与交会联合优化设计问题,建立了精确的有限推力轨道转移和空间交会模型,推力幅值恒定,优化性能指标均为时间最短。 Study perturbation finite thrust under the circumstance of orbit transfer with SEC optimization design problems, establish the mathematical model for finite thrust orbit transfer and rendezvous, thrust amplitude constant, optimal performance indexes for the shortest time.