随着深度学习的迅速发展,图像识别技术也随之日益提高,其中目标检测在辅助驾驶系统、医学领域和车流监测系统等占有重要地位。大多目标检测算法对大目标较为敏感,且并未考虑特征与特征之间的相互关系及重要程度,然而小目标在图像中覆盖...随着深度学习的迅速发展,图像识别技术也随之日益提高,其中目标检测在辅助驾驶系统、医学领域和车流监测系统等占有重要地位。大多目标检测算法对大目标较为敏感,且并未考虑特征与特征之间的相互关系及重要程度,然而小目标在图像中覆盖区域小,分辨率低,携带信息较少,导致小目标的误检或漏检率较高。针对以上问题,对小目标检测的难点进行研究,提出了一种基于改进的DSSD(deconvolutional single shot detector)的小目标检测算法。该算法引入混合注意力机制,在通道维度上增加权重分量进行加权求和表示信息相关度,并将图片中的空间域信息做对应空间变换,提取关键信息,突出局部重点区域,有利于前景小目标的特征学习。实验结果表明,该算法在VOC2007测试集上的精确度达到81.02%,比原DSSD算法高出1.3%,且均优于其他对比算法,证明了算法的有效性。展开更多
Double-crossed-step-stress(DCSS) accelerated life test(ALT) method is widely used for estimating the lifetime of products with high reliability and long lifetime. In order to further reduce the test time and test cost...Double-crossed-step-stress(DCSS) accelerated life test(ALT) method is widely used for estimating the lifetime of products with high reliability and long lifetime. In order to further reduce the test time and test cost, a double-synchronous-step-stress(DSSS) ALT method which combines a double-synchronous-step-downstress(DSSDS) ALT method and a double-synchronous-step-up-stress(DSSUS) ALT method is proposed. The accelerated stresses decrease and increase in a synchronous way with one step in the DSSDS-ALT and DSSUSALT methods, respectively. Monte Carlo method is adopted to simulate the two methods, and the validity and efficiency of them are demonstrated by the simulation results. In addition, a comparison analysis of efficiency between DSSDS-ALT method and DSSUS-ALT method is carried out. The result shows that the DSSDS-ALT method compared with the DSSUS-ALT method can significantly improve the test efficiency under the same test condition.展开更多
文摘随着深度学习的迅速发展,图像识别技术也随之日益提高,其中目标检测在辅助驾驶系统、医学领域和车流监测系统等占有重要地位。大多目标检测算法对大目标较为敏感,且并未考虑特征与特征之间的相互关系及重要程度,然而小目标在图像中覆盖区域小,分辨率低,携带信息较少,导致小目标的误检或漏检率较高。针对以上问题,对小目标检测的难点进行研究,提出了一种基于改进的DSSD(deconvolutional single shot detector)的小目标检测算法。该算法引入混合注意力机制,在通道维度上增加权重分量进行加权求和表示信息相关度,并将图片中的空间域信息做对应空间变换,提取关键信息,突出局部重点区域,有利于前景小目标的特征学习。实验结果表明,该算法在VOC2007测试集上的精确度达到81.02%,比原DSSD算法高出1.3%,且均优于其他对比算法,证明了算法的有效性。
基金the National Natural Science Foundation of China(Nos.51265025 and 51665029)
文摘Double-crossed-step-stress(DCSS) accelerated life test(ALT) method is widely used for estimating the lifetime of products with high reliability and long lifetime. In order to further reduce the test time and test cost, a double-synchronous-step-stress(DSSS) ALT method which combines a double-synchronous-step-downstress(DSSDS) ALT method and a double-synchronous-step-up-stress(DSSUS) ALT method is proposed. The accelerated stresses decrease and increase in a synchronous way with one step in the DSSDS-ALT and DSSUSALT methods, respectively. Monte Carlo method is adopted to simulate the two methods, and the validity and efficiency of them are demonstrated by the simulation results. In addition, a comparison analysis of efficiency between DSSDS-ALT method and DSSUS-ALT method is carried out. The result shows that the DSSDS-ALT method compared with the DSSUS-ALT method can significantly improve the test efficiency under the same test condition.