ID 原文 译文
14605 最后通过融合全局平均池化层处理后的CNN特征来进行图像检索。 Finally, the CNN features processed by the globalaverage pooling layer are fused to image retrieval.
14606 所提方法在corel1k、corel5k和corel10k三个数据集上与其他先进的图像检索方法进行了比较,结果表明该方法能够有效提高图像检索的精确率和召回率,并且在检索返回的前k张图像的数量(top-k)增加时,仍能保持良好且稳定的检索精确率。 This method is compared with other advanced image retrieval methods on corel1k,corel5k and corel10k datasets. The experimental results show that this methodcan effectively improve the precision rate and recall rate of image retrieval,and can maintain a good andstable precision rate when the number of the first k images (top-k) increases.
14607 在深空测距任务中,高精度的伪码捕获是后续执行伪码跟踪的关键前提。 In deep space ranging tasks,high-precision pseudocode acquisition is the key premise for subsequent pseudo-noise(PN) code tracking.
14608 传统基于时频二维搜索的频偏估计算法对于深空测距中频率偏移范围较大的情况难以满足伪码捕获实时性要求。 For deep space ranging in which the Doppler shift is large,it isdifficult for traditional Doppler shift estimation algorithm based on the time -frequency two -dimensional(2D) search to meet the real-time requirements of PN code capture.
14609 为此,提出了改进的时频二维搜索算法,通过在传统时频二维搜索算法的前端引入快速傅里叶变换(Fast Fourier Transform,FFT)算法对多普勒频偏进行预估,避免在大多普勒范围的频点遍历,能够有效降低频偏估计的时间开销。 Therefore, an improved time-frequency 2D search algorithm is proposed. By introducing the fast Fourier transform(FFT) algorithm at the frontend of the traditional time-frequency 2D search algorithm to predict the Doppler shift,traversing the frequency points in the huge Doppler shift is avoided,thus effectively reducing the time cost of frequency offset estimation.
14610 实验表明,该方法能够在大多普勒频偏环境下利用有限的硬件资源快速地实现伪码捕获,满足伪码捕获的实时性要求。 Experiments show that this method can quickly achieve PN code capture with limited hardware resources in huge Doppler shift environments,and meets the real-time requirements of PN code acquisition.
14611 针对GPSM码信号受到C/A码和Y码信号的干扰难以直接进行解调的问题,提出了一种基于C/A码辅助的M码盲解调方法。 It is difficult to demodulate GPS M code signal directly due to the interference of C / A code andY code signal. To solve this problem,a blind demodulation method of M code based on C / A code is proposed.
14612 利用解调后的C/A码信号校正信号频偏,通过I/Q支路分离实现将C/A码信号与Y码、M码信号的剥离,最后利用M码信号的特点进行相参增强进一步提高性能。 The demodulated C / A code signal is used to correct the signal frequency offset,and the separation of C / A code signal from Y code and M code signal is realized through I/ Q branch separation.
14613 实采数据的解调实验证明了所提算法的可行性。 Finally,the performance is further improved by using the characteristics of M code signal,and the feasibility of the proposed algorithm is proved by the demodulation experiment of real data.
14614 在实际电子侦察过程中,由于各种原因,侦收到的不同类型信号数量相差很大,类别之间严重不平衡,常规方法在这种数据集下训练得到的分类器不能有效识别少数类。 In the actual electronic reconnaissance process,due to various reasons,the number of receivedsignals of different types varies greatly,and there is a serious imbalance between classes.