ID 原文 译文
26685 为此，首先推导描述星间相对运动的完整动力学方程以及对参考轨迹的跟踪误差方程，基于完整相对动力学模型的无摄动形式，利用LGR(Legendre-Gauss-Radau)法将最优轨迹规划问题转化为非线性规划问题，使其可以数值求解； To do this, first is derived to describe the full dynamic equations of the relative motion between the star and the reference trajectory tracking error equation, based on dynamics model of relatively complete without perturbation form, using the LGR (Legendre - Gauss - Radau) method to the optimal trajectory planning problem into a nonlinear programming problem, make its can be solved numerically;
26686 进而设计了带极点配置的H∞控制器，通过将系统闭环极点配置到左半复平面的合适区域，可以得到满意的跟踪误差同时维持合理的燃料消耗，在存在地球引力摄动、空间环境扰动以及主星轨道机动的情况下，能够完成对期望轨迹的跟踪。 Then design the h-infinity controller with pole assignment, the closed loop poles the system to the appropriate area of the left half complex plane, can get satisfactory tracking error while maintaining reasonable fuel consumption, in the presence of the earth's gravitational perturbation, space environment disturbance and main orbit maneuver, able to complete the desired trajectory tracking.
26687 仿真结果显示了结果的有效性。 The simulation results show the validity of the results.
26688 分析了一种多品种维修器材联合订货的库存决策模型，该模型采用连续检查的多品种统一订购库存策略。 Analysis of a variety of maintenance equipment joint replenishment inventory decision model, many varieties of unified order this model, the retailer USES continuous review inventory strategy.
26689 维修器材库存控制的目的是在确保维修器材服务水平的基础上，降低库存成本。 Maintenance material inventory control, the aim is to ensure that equipment maintenance service level, on the basis of reducing inventory costs.
26690 根据这一思想设计算法，首先假设订货点和订购提前期为零，根据库存成本确定最大库存量，然后考虑订货点和订购提前期不为零的情况，根据维修器材满足率确定各品种维修器材的订货点，从而求得决策参数。 Design algorithm according to this thought, the first hypothesis reorder point and order lead time is zero, according to the inventory costs to determine the maximum inventory, then consider order point and order lead time is not zero, according to the maintenance of equipment to meet rate maintenance equipment each type of order point is determined, and the decision parameters are obtained.
26691 最后通过实例证明模型和算法的有效性。 Finally, examples show the effectiveness of the model and algorithm.
26692 干扰对齐(interference alignment，IA)通过在接收端把干扰对齐到同一个子空间中，可以在干扰信道中实现最大的自由度，但在低信噪比时，IA可靠性较差，针对这个问题，研究了实现分集IA的条件，提出了基于子空间投影的单端分集及双端分集的具体实现方案。 Interference alignment (interference alignment, IA) through the interference at the receiving end is aligned to the same height in the space, can achieve the greatest degree of freedom in the interference channel, but in low signal-to-noise ratio, IA reliability is poorer, aiming at this problem, studies the conditions, realize the diversity of IA based on subspace projection is proposed single-ended diversity and the specific implementation scheme of double end diversity.
26693 通过理论分析和仿真验证阐述了分集对改善IA性能的机理，给出了IA中分集与复用的折中方案。 Through theoretical analysis and simulation verification mechanism of diversity on the properties of improved IA IA is given in the diversity and multiplexing of compromise.
26694 分集能提高IA的接收信噪比，减小差错概率，从而改善IA在低信噪比时的性能。 Diversity can improve the receiving SNR of IA, reduce the error probability, thus improving the performance of the IA in low SNR.