ID 原文 译文
5674 采用传统密度峰聚类算法实现Walsh码软扩频信号盲解扩时,算法的截断距离根据经验选取,性能不稳定。 Traditional peak density clustering algorithm was adopted to realize soft Walsh code spread spectrum signal blind algorithm, the algorithm of the truncated distance according to the experience in the selection, performance is not stable.
5675 针对这一问题,提出改进密度峰聚类软扩频信号的盲解扩算法。 In order to solve this problem, put forward to improve the density peak cluster soft spread spectrum signal blind expansion solution algorithm.
5676 该算法采用赋权欧氏距离作为数据的相似性度量并根据数据总体分布情况自适应确定截断距离,具有效率高、性能稳定等特点。 The algorithm adopts the empowerment Euclidean distance as the similarity measure data and on the basis of the data distribution of the overall adaptive truncation distance, has the characteristics of high efficiency and stable performance.
5677 Matlab环境下仿真结果表明,文中所述的改进算法能够自动确定截断距离,在信噪比为0~10dB范围内准确估计伪码序列规模数和伪码序列,并在该条件下实现Walsh码软扩频信号盲解扩。 Mentioned in the Matlab environment simulation results indicate that the improved algorithm can automatically determine the truncation of distance, the signal-to-noise ratio of 0 ~ 10 db pn code sequence number and the scale function is estimated accurately within the scope of pn code sequence, and under the condition of the blind algorithm to realize soft Walsh code spread spectrum signal.
5678 针对战时装备受到使用退化与随机冲击的共同作用发生竞争失效的问题,提出了基于状态的预防性维修策略。 Degradation and stochastic shocks for wartime equipment by using a combination of competitive failure problems, puts forward the preventive maintenance strategy based on state.
5679 首先建立了单系统的可靠性评估模型,该模型考虑了装备系统冲击阈值随总退化量的累计而减少的实际,并提出了阈值连续变化条件下的装备系统可靠性建模方法; First single system reliability evaluation model is established, the model takes into account the equipment system impact threshold decrease with total degradation rate of cumulative's reality, and puts forward the threshold value under the condition of continuous change equipment system reliability modeling method;
5680 其次针对装备的隐蔽功能故障,提出了定期检测下基于状态的预防性维修策略,构建了装备系统的成本率函数; Second in view of the hidden function of the equipment failure, and puts forward the preventive maintenance strategy based on state under periodic testing, build the cost rate of equipment system functions;
5681 最后结合实例分析,确定了装备系统的可靠度函数和最优预防性更换阈值,并对比分析了不同冲击阈值参数对可靠度的影响。 Finally combining with case analysis, determined the reliability of equipment system function and the optimal preventive replacement threshold, and contrast analysis of the different threshold value for the influence of parameters on the reliability.
5682 研究结果表明:该模型可以有效解决竞争失效条件下装备系统的可靠性评估问题,同时也可为装备系统预防性维修策略提供模型参考。 The results show that the model can effectively solve the competition failure under the condition of equipment system problem of reliability assessment, at the same time can also be provided for the preventive maintenance strategy of equipment system model reference.
5683 针对无控旋转目标航天器强迫绕飞的控制策略问题,强迫绕飞时要求追踪器对无控旋转目标器具备视线指向的能力,以便在较短的时间内进行全面观测。 Without control and rotating target spacecraft force on orbit control strategy, the force required to fly around tracker for no accused of rotation target devices for ability to point to the line of sight, so that a comprehensive observation in a relatively short period of time.