ID 原文 译文
49066 推导了衰落信道下协同传输的理论性能一致界,进行了系统性能仿真,并重点分析了信号空间分集中星座维数、协同程度及星座映射关系对系统性能的影响。 Fading channel was deduced under the cooperative transmission theory of consistent performance, the performance of the system simulation, and analyses the signal space points concentrated constellation dimension, coordination degree and the mapping relationship will affect the performance of the system.
49067 理论分析及仿真结果均表明:快衰落信道下,信号空间分集会带来额外的增益;在快、慢两种衰落信道下,通过协同程度的增加及最佳映射关系的选择都可以带来系统性能的提升。 Theoretical analysis and simulation results show that under the fast fading channel, signal gathering additional gain space points;Under the fast and slow two kinds of fading channel, through the synergy degree increased and the selection of optimal mapping relation can lead to improve system performance.
49068 反导拦截导弹的飞行方案及发射时间窗口随发射点及预测命中点的位置变化而变化。 Anti-missile interceptor missile flight program and launch time window on launch and predict the position of the impact point.
49069 在不同发射场景中,快速设计反导拦截导弹的飞行方案及发射时间窗口可以有效提高反导拦截系统的反应能力。 In different emission scenarios, rapid design anti-missile interceptor missile flight program and launch time window can effectively improve the reaction ability of missile interception system.
49070 针对该问题,综合考虑了地球J2项摄动、地球自转、科里奥利力等因素的影响,建立了拦截导弹在地球三维空间中的动力学模型,并提出了一种基于迭代最小二乘的飞行方案及发射时间窗口的快速搜索设计算法。 Aiming at this problem, considering the J2 perturbation earth, the earth's rotation, coriolis force, the influence of such factors as the interceptor missile is established in the earth's dynamic model in 3 d space, and a flight scheme based on the iterative least squares and launch time window of the fast search algorithm is designed.
49071 最后,通过相关仿真计算验证了所提方法的合理性。 Finally, the proposed method was verified by the simulation calculation related to the rationality.
49072 由于类别较多或者特征单一等原因,传统的支持向量机方法对一些复杂问题的分类,很难获得好的识别效果。 Because a single category or more characteristics such as reason, the traditional support vector machine (SVM) classification method for some complex problems, it is difficult to achieve good recognition effect.
49073 首先使用一种树状结构将概率支持向量机推广到多分类问题;然后提出一种自适应权值的多特征融合方法,根据概率输出自动调整不同分类器的相关权值,将所有分类器的结果进行加权得到最终的判决结果。 Probability of the first to use a tree structure will be more than support vector machine (SVM) to classification problem;And then put forward a kind of more characteristics of adaptive weighting fusion method, according to the probability output automatically adjust the relative weights of different classifiers, all the results of the classifier are weighted to get the final decision.
49074 为解决实际应用中常出现的非平衡问题,提出综合权值方法,将类别权值与特征权值进行综合。 To solve the problem of non equilibrium of the actual application often appear problem, put forward the comprehensive weight method, the weights of the category and feature weight synthetically.
49075 实验结果表明,融合方法较之传统的支持向量机一对一方法以及概率支持向量机方法能够获得更高的识别率;对于非平衡问题,综合权值方法可以得到更加合理的识别结果。 The experimental results show that the fusion method compared with the traditional support vector machine (SVM) one-on-one support vector machine (SVM) method and probability method can achieve higher recognition rate;To the problem of unbalanced integrated weighting method can get the result is more reasonable.