ID 原文 译文
38546 为进一步提高区间灰数预测精度,提出基于核和灰度的灰色马尔可夫预测模型。 In order to further improve the predictive accuracy of interval grey Numbers is proposed based on nuclear and grey markov prediction model of gray.
38547 该方法以区间灰数核序列为依托建立预测模型,实现区间灰数核的预测; The method based on interval grey number sequences of nuclear prediction model is established, the implementation of interval grey number nuclear prediction;
38548 又根据"灰度不减公理",由灰数核为中心延伸得出区间灰数的上下界; And according to the "gray unabated axiom", by the grey number nuclear extension for the center it is concluded that the upper and lower bounds of the interval grey number;
38549 在保持区间灰数独立完整的前提下,构建了区间灰数预测模型,在此基础上用马尔可夫预测模型修正预测结果。 In keeping the interval grey number independent complete under the premise of interval grey number prediction model is constructed, based on the predicted with markov prediction model correction results.
38550 该模型在航空货运量的趋势预测中显示马式链修正结果较区间灰数预测数据呈低估状态。 The model is shown in the trend of aviation freight volume forecast horse type chain correction results interval grey number forecast data are undervalued.
38551 结果有助于加强市场参与者对航空货运市场的宏观认识,并为经济决策行为提供参考。 Results contribute to strengthen market participants to the air cargo market macro understanding, and provide reference for economic decision-making.
38552 在中轨合成孔径雷达(synthetic aperture radar,SAR)成像中,大斜视角以及长合成孔径时间会导致信号产生严重的距离走动和二维空变。 In the rail in synthetic aperture radar (synthetic aperture radar, SAR) imaging, the large squint Angle and long synthetic aperture time will lead to signal a serious walking distance and two-dimensional space-variant.
38553 首先,针对信号的距离走动问题,采用了变脉冲重复频率(pulse repetition frequency,PRF)技术对回波进行录取,消除大距离走动带来的回波接收问题。 First of all, for walking distance of the signal, using the variable pulse repetition frequency, pulse repetition frequency, PRF) technology for admission of echo, eliminate echo receiving of the problems of big walking distance.
38554 然后,针对传统的波数域算法不能实现大斜视中轨SAR信号的聚焦问题,提出了一种结合改进的Stolt插值的时频联合尺度变换的成像方法,利用方位时间尺度变换来解决信号方位调频率的2次空变,再使用改进的Stolt插值完成距离徙动校正。 Then, in view of the traditional wavenumber domain algorithm can not achieve large oblique rail SAR signal is focused on the problem, this paper proposes a combined with improved Stolt interpolation time-frequency joint imaging of scale transformation method, to solve the signal with the azimuth time scale transform bearing rate of space-variant twice, then use the improved Stolt interpolation range migration correction.
38555 最后,利用多普勒尺度变换来处理剩余的高次空变。 Finally, using doppler scale transform to deal with the rest of the space-variant high times.