远程迷惑式干扰效果评估模型

在分析远程迷惑式干扰机理的基础上,研究迷惑式干扰的各种影响因素,分别引入了箔条云相似因子、时间有效性因子、编队模拟逼真度因子、雷达识别影响因子和战术选择影响因子等多个效果评估指标,提出了多箔条云数目的整合模型,然后求导出在远程迷惑式干扰务件下搜索雷达对真实目标的捕捉概率计算模型,最后验证了模型的合理性.     

中远程空空导弹目标截获概率仿真计算

分析了影响中远程复合制导空空导弹截获目标的主要因素,建立了捷联惯导误差模型、载机雷达观测误差模型、雷达导引头误差模型等,提出了用蒙特卡洛法的方法计算截获概率,并给出仿真实例.仿真结果表明了模型和算法的有效性和实用性,为分析捷联惯导、载机雷达等对目标截获概率的影响提供了方法和支持.     

概率分布模型的飞机战备完好率评估与预测

飞机战备完好率是军用飞机战斗力的重要体现.在分析目前部队常用的飞机战备完好率算法缺陷的基础上,建立了基于概率分布的飞机战备完好率计算模型,该模型体现了飞机任务可靠性、维修性与战备完好性之间的关系.以某型飞机为例,通过分析飞机任务可靠度,利用飞机可靠性、维修性、保障性及作战训练任务的历史统计数据,依据概率分布模型对飞机的...     

融合神经网络与超像素的候选区域优化算法

为解决目标检测中候选区域召回率低的问题,提出融合神经网络与超像素的目标候选区域算法。该算法利用神经网络提取更能清楚表达目标边界的特征,并使用聚类、相似性等策略,计算每个滑动窗口所含有的边缘信息量;将待测图像使用简单线性迭代聚类算法分割成若干个超像素,并利用超像素的空间位置、完整性、相邻超像素间的对比度信息,计算各个超像素的显著性得分及每个滑动窗口的显著性得分;根据每个滑动窗口的边缘信息及显著性得分筛选滑动窗口。在PASCAL VOC 2007测试集上进行对比实验,其实验结果表明:所述算法能够快速产生定位质量高的候选区域。     

Fuzzy recognition of missile borne multi-line array infrared detection based on size calculating

In order to improve the infrared detection and discrimination ability of the smart munition to the dy-namic armor target under the complex background, the multi-line array infrared detection system is established based on the combination of the single unit infrared detector. The surface dimension features of ground armored targets are identified by size calculating solution algorithm. The signal response value and the value of size calculating are identified by the method of fuzzy recognition to make the fuzzy classification judgment for armored target. According to the characteristics of the target signal, a custom threshold de-noising function is proposed to solve the problem of signal preprocessing. The multi-line array infrared detection can complete the scanning detection in a large area in a short time with the characteristics of smart munition in the steady-state scanning stage. The method solves the disadvan-tages of wide scanning interval and low detection probability of single unit infrared detection. By reducing the scanning interval, the number of random rendezvous in the infrared feature area of the upper surface is increased, the accuracy of the size calculating is guaranteed. The experiments results show that in the fuzzy recognition method, the size calculating is introduced as the feature operator, which can improve the recognition ability of the ground armor target with different shape size.     

Visual SLAM in dynamic environments based on object detection

A great number of visual simultaneous localization and mapping (VSLAM) systems need to assume static features in the environment. However, moving objects can vastly impair the performance of a VSLAM system which relies on the static-world assumption. To cope with this challenging topic, a real-time and robust VSLAM system based on ORB-SLAM2 for dynamic environments was proposed. To reduce the influence of dynamic content, we incorporate the deep-learning-based object detection method in the visual odometry, then the dynamic object probability model is added to raise the efficiency of object detection deep neural network and enhance the real-time performance of our system. Experiment with both on the TUM and KITTI benchmark dataset, as well as in a real-world environment, the results clarify that our method can significantly reduce the tracking error or drift, enhance the robustness, accuracy and stability of the VSLAM system in dynamic scenes.     

知识图谱的预警探测体系探测效能贝叶斯评估方法

战争中,预警探测体系作为典型的复杂系统,其探测效能发挥情况的有效评估一直是亟需人们研究解决的重要现实问题.突破了传统效能评估方法的局限,在分析了知识图谱技术、贝叶斯评估方法基本原理的基础上,提出了基于两者综合运用的预警探测体系探测效能评估新方法,利用专家知识和实验数据构建知识图谱,并进一步使用贝叶斯网络方法实施知识推理...     

增强路由器安全性的一种措施

路由器是军用电子信息系统的关键互联设备,提高路由器自身的安全性非常必要。首先对路由器涉及到的安全问题作了较为详细地分析,然后给出一种增强路由器安全性的技术措施。该措施重点处理终点包对路由器的威胁,将入侵检测模块与数据包过滤模块进行联动,通过入侵预防、入侵时的检测和响应、入侵后的快速分析与恢复等三个环节,提高路由器抗攻击的能力。最后探讨了该措施对路由器性能的影响。     

舰载雷达发现目标的效能概率计算

根据舰载雷达保障火炮射击任务的要求,结合火炮自身使用特点,提出舰载雷达发现目标的效能概率计算问题。应用概率分析方法,对多种距离上舰载雷达发现目标保障火炮系统有效射击的概率进行了推导,得出舰载雷达保障火炮系统有效射击的概率计算公式,并进行了实例分析。实际作战运用中,可以应用此算法对火炮系统的射击概率计算,可以较好地保障火炮系统的射击准备时间,但影响实际火炮射击的因素很多,表征雷达发现目标的效能指标也很多,应综合考虑。     

基于组合媒质通道模型的地下目标成像

由于电磁波在穿越不同介质时会出现折射现象,因此在地下目标成像过程中,电磁波信号穿越从雷达到地下目标的组合通道的路径不是直线而是折线,此时利用常规的自由空间中的合成孔径成像方法已经不能对目标进行成像。基于电磁波的传播规律和地层有耗媒质的特性,提出了电磁波传输的组合通道模型,并将其应用到地下目标成像中。通过仿真比较可以看出,使用组合通道模型对地下目标成像效果有明显的改善,组合通道模型适用于对分层土壤中的地下目标成像。