ID 原文 译文
58008 首先通过最优化原则估计定向性天线相位中心，推导出阵列的有效孔径，构建方向性导向矢量; Firstly，the phase center of one directional antenna is estimated by the optimization principle，the effective aperture of the array is deduced and the directional steering vector is constructed as well.
58009 然后综合考虑相位扰动、相位中心估计误差等因素对DOA 估计精度的影响，分析并推导出误差矢量; Subsequently，considering the integrated effect of phase disturbance and phase center estimation error on DOA estimationaccuracy，the error vector is analyzed and deduced.
58010 最后对常规理想点源天线阵列的 DOA 估计模型进行改进，并对影响 DOA 估计误差的因素进行仿真. Finally，a DOA estimation model of conventionalideal point source antenna array is improved and some factors affecting DOA estimation error are simulated.
58011 实验结果表明，该模型具有单元天线参与数量少、相同误差因素下 DOA 估计精度高的优点. Simulations show that the model has the advantages of small number of antennas and high accuracyof DOA estimation under the same error factors.
58012 针对多个移动节点( MN) 同时切换场景下切换过程受其他节点影响较大的问题，提出了代理移动 IP 协议中利用有限状态吸收马尔可夫链分析多个 MN 同时切换场景的模型，推导了多个 MN 切换时完成链路层切换的总时延公式; When multi-mobile nodes( MN) simultaneously initiate handoff，the handoff process of a MNwill greatly influenced by other nodes. Finite-state absorbing Markov chain is adopted to model theprocess of multi-MN’s handoff in proxy MIPv6 and the total handoff delay of multiple MN is derived.
58013 给定时延限制下 MN 切换成功的概率和移动接入网关的容量公式. Besides，the handoff success probability and the capacity of mobile access gateway under delay limitationare deduced.
58014 仿真结果验证了建模分析的正确性，与已有研究结果对比表明，所提建模方法更合理，所得结论可作为网络管理和配置的参考. Moreover，we validate our modeling by simulating the handoff process and comparing withthe existing work. The results could be a reference for network administration and configuration.
58015 针对云服务系统中虚拟机可以迁移的特点，提出了服务台数量可变的 M /M /m( t) 系统模型. In view of the migration characteristics of virtual machines in cloud service systems，an M /M /m( t) system model with variable number of servers is proposed.
58016 构造基于子任务队长过程和虚拟机数量变化过程的两维马尔可夫链，利用矩阵几何理论得到了该过程的稳态分布以及该系统的稳态性能指标. A two-dimensional Markovian chainbased on the queuing length process of sub-tasks and the number changing process of virtual machines isestablished. The steady-state distribution of the process and the steady-state performance index of the system are obtained by using matrix geometric theory.
58017 在考虑服务水平协议的前提下，给出了系统需要开启虚拟机平均数的近似下界，并分析了不同参数对排队指标和处于 on 状态虚拟机数量的影响. Considering the service level agreement，an approximate lower bound of the average number of virtual machines that the system should open is given，and theeffects of different parameters on the queuing index and the number of virtual machines in on-state are analyzed.