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| 1 | Uncertainty measure in evidence theory显示文摘As an extension of probability theory,evidence theory is able to better handle unknown and imprecise information.Owing to its advantages,evidence theory has more flexibility and effectiveness for modeling and processing uncertain information.Uncertainty measure plays an essential role both in evidence theory and probability theory.In probability theory,Shannon entropy provides a novel perspective for measuring uncertainty.Various entropies exist for measuring the uncertainty of basic probability assignment(BPA)in evidence theory.However,from the standpoint of the requirements of uncertainty measurement and physics,these entropies are controversial.Therefore,the process for measuring BPA uncertainty currently remains an open issue in the literature.Firstly,this paper reviews the measures of uncertainty in evidence theory followed by an analysis of some related controversies.Secondly,we discuss the development of Deng entropy as an effective way to measure uncertainty,including introducing its definition,analyzing its properties,and comparing it to other measures.We also examine the concept of maximum Deng entropy,the pseudo-Pascal triangle of maximum Deng entropy,generalized belief entropy,and measures of divergence.In addition,we conduct an analysis of the application of Deng entropy and further examine the challenges for future studies on uncertainty measurement in evidence theory.Finally,a conclusion is provided to summarize this study. | Yong DENG | 2020 | Science China(Information Sciences)2020，63，11： | 10 |
| 2 | 非高斯杂波背景中的两个距离扩展目标检测器显示文摘针对采用球不变随机向量(SIRV)建模的非高斯杂波背景中检测具有稀疏散射点的距离扩展目标问题,先假设目标强散射点的位置信息已知,采用广义似然比检验(GLRT)理论,提出了基于散射点位置的GLRT(SL-GLRT)检测器。然后,采用门限法估计散射点的位置信息,提出了双门限恒虚警率(DT-CFAR)检测器,推导了虚警概率与检测门限关系的解析表达式,并给出门限的确定方法。与现有方法相比,散射点位置信息已知时,SL-GLRT具有最佳的检测性能,散射点位置信息未知时,DT-CFAR具有较好的鲁棒性。 | 顾新锋 简涛 何友 郝晓琳 | 2012 | 宇航学报2012，33，5： | 5 |
| 3 | Robust detector for range-spread targets in non-Gaussian background显示文摘Based on the target scatterer density,the range-spread target detection of high-resolution radar is addressed in additive non-Gaussian clutter,which is modeled as a spherically invariant random vector.Firstly,for sparse scatterer density,the detection of target scatterer in each range cell is derived,and then an M/K detector is proposed to detect the whole range-spread target.Secondly,an integrating detector is devised to detect a range-spread target with dense scatterer density.Finally,to make the best of the advantages of M/K detector and integrating detector,a robust detector based on scatterer density(DBSD) is designed,which can reduce the probable collapsing loss or quantization error effectively.Moreover,the density decision factor of DBSD is also determined.The formula of the false alarm probability is derived for DBSD.It is proved that the DBSD ensures a constant false alarm rate property.Furthermore,the computational results indicate that the DBSD is robust to different clutter one-lag correlations and target scatterer densities.It is also shown that the DBSD outperforms the existing scatterer-density-dependent detector. | Tao Jian You He Feng Su Dianfa Ping Xiaodong Huang | 2012 | Journal of Systems Engineering and Electronics2012，23，3： | 5 |
| 4 | GLRT-based generalized direction detector in partially homogeneous environment显示文摘Dear editor,Target detection is a basic function for any radar system (1)For the problem of generalized direction detection, two adaptive detectors were proposed in [2], according to the generalized likelihood ratio test (GLRT). For the above problem,under the signal-presence hypothesis, the rows and columns of a rank-one matrix-valued signal belong to known subspaces;however, the corresponding coordinates are unknown. | Weijian LIU Fei GAO Yuwen LUO Jun LIU Yongliang WANG | 2019 | Science China(Information Sciences)2019，62，10： | 2 |
| 5 | 基于修正熵的距离扩展目标检测器显示文摘针对采用球不变随机向量(spherically invariant random vector,SIRV)建模的非高斯杂波背景下,目标散射点个数估计失配时,修正的依赖于散射点密度的检测器(modified scatter density dependent,MSDD)检测距离扩展目标存在一定的信噪比损失问题,提出了一种基于修正熵的MSDD检测器(modified entropy-MSDD,ME-MSDD)。ME-MSDD先采用修正熵对目标强散射点个数进行估计,然后对目标强散射点进行积累形成检测统计量。最后,针对不同的目标模型及实测目标一维距离像对检测器性能进行评估,结果表明,与不依赖于散射点密度的检测器(non-scatter density dependent,NSDD)、基于动态阈值的检测器(dynamic threshold,DT)和MS-DD相比,ME-MSDD能根据实际观测值自适应地估计目标散射点个数,具有更好的检测性能和鲁棒性。 | 顾新锋 何友 简涛 郝晓琳 | 2012 | 系统工程与电子技术2012，34，6： | 2 |
| 6 | 非高斯杂波背景中距离扩展目标的盲积累检测器显示文摘在采用球不变随机向量(SIRV)建模的非高斯杂波背景下,研究了导向矢量失配或未知时距离扩展目标的检测问题。先假设导向矢量已知,采用广义似然比检验(GLRT)得到每个距离单元的归一化匹配滤波器(NMF)统计量,再将多个距离单元的统计量进行非相干积累得到扩展目标的NMF积累检测器(NMFI),然后通过最大化检测统计量的方法,结合特征值分解技术,对导向矢量进行估计,提出了距离扩展目标的盲NMFI(B-NMFI)。仿真分析表明:当导向矢量失配时,NMFI的检测性能优于GLRT;当导向矢量未知时,B-NMFI能有效地检测目标,并且对不同方位的目标具有很好的鲁棒性。 | 顾新锋 简涛 何友 郝晓琳 | 2012 | 航空学报2012，33，12： | 2 |
| 7 | 非高斯杂波背景中距离扩展目标的自适应积累检测器显示文摘针对SIRV建模的非高斯杂波背景中距离扩展目标检测问题,首先,假设杂波协方差矩阵结构已知,利用点目标检测器NMF对每个距离单元多个脉冲回波进行相干积累,再对目标所占距离单元能量进行非相干积累,提出了距离扩展目标的积累检测器NMFI,并推导了NMFI虚警概率与检测门限的关系表达式.其次,利用不含目标的辅助单元数据提出了修正的协方差矩阵迭代估计器MRE,再将估计矩阵代替NMFI中的真实协方差矩阵得到自适应检测器MRE-ANMFI,并证明了MRE-ANMFI对杂波纹理分量和协方差矩阵结构的CFAR特性.最后,利用仿真实验验证了本文方法的有效性. | 何友 顾新锋 简涛 | 2013 | 中国科学:信息科学2013，43，4： | 2 |
| 8 | Subspace detection for range-spread target to suppress interference:exploiting persymmetry in non-homogeneous scenario显示文摘This paper deals with subspace detection for rangespread target in non-homogeneous clutter with unknown covariance matrix where structured interference is presented in the received data.Through exploiting the persymmetry of the clutter covariance matrix,we propose two adaptive target detectors,which are referred to as persymmetric subspace Rao to suppress interference and persymmetric subspace Wald to suppress interference('PS-Rao-I'and'PS-Wald-I'),respectively.The persymmetry-based design brings in the advantage of easy implementation for small training sample support.The signal flow analysis of the two detectors shows that the PS-Rao-I rejects interference and integrates signals successively through separated matrix projection,while the PS-Wald-I jointly achieves interference elimination and signal combination via oblique projection.In addition,both detectors are shown to be constant false alarm rate detectors,significantly improving the detection performance with other competing detectors under the condition of limited training. | GAO Yongchan MAO Linlin ZHU Shengqi ZUO Lei | 2022 | Journal of Systems Engineering and Electronics2022，33，1： | 1 |
| 9 | 基于正交小波变换的目标检测方法显示文摘理论分析表明,独立高斯噪声经过正交小波变换后保持方差和独立性不变。基于Mallat的小波多分辨分析,通过对小波系数进行平方律处理,建立了基于正交小波变换的恒虚警率检测器模型,推导了相应的虚警和检测概率公式,分析了噪声未知情况下小波系数序列长度对检测性能的影响,并给出了合适的长度值。实验结果表明,所提出的检测器能满足不同虚警概率和杂波背景的要求,具有较好自适应性。 | 孙宏岩 | 2015 | 海军航空工程学院学报2015，30，5： | 0 |
| 10 | 箔条云干扰下的单目标恒虚警率检测研究显示文摘箔条云在扩散过程中随着时间变化会稀释和扩大,其回波特性会发生改变,被检测目标与箔条的相互位置关系也会影响雷达恒虚警检测。针对作战对抗过程中箔条干扰易造成雷达接收机阻塞干扰目标检测,检测概率迅速降低且易丢失目标贻误战机,通过详细分析箔条的扩散过程及信号频谱特性及其箔条云和目标的两种位置关系,利用恒虚警处理算法在噪声基底为10 dB和20 dB情况下对目标进行恒定虚警率检测研究。研究结果对改善飞机检测性能和抗虚警能力以及提高战场生存率具有积极作用。 | 程嗣怡 王玉冰 罗朝义 张强 | 2017 | 火力与指挥控制2017，42，5： | 0 |
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