【摘 要】
：
In this paper,a kind of elastic characteristic extraction method of underwater targets based on adaptive filtering is introduced.The kernel of the method is the
论文部分内容阅读
In this paper,a kind of elastic characteristic extraction method of underwater targets based on adaptive filtering is introduced.The kernel of the method is the recursive least square (RLS) algorithm.Firstly,the geometric scattering signal is fit by using the echo signal and the incident signal.Then,the frequency spectrum of the echo signal and the geometric scattering signal are calculated.At last,the frequency spectrum of the elastic scattering signal is obtained.The research of the simulation and lake experiment is carried on.As the results show,the formants of the elastic signal frequency spectrum can be precisely extracted by the algorithm,and the extraction algorithm can apply to extracting the elastic characteristic from the echo signal in a real underwater acoustics environment.
其他文献
This research presents an algorithm for face detection based on color images using three main components: skin color characteristics, hair color characteristics, and a decision structure which convert
据全国农业技术推广服务中心预测分析,2003年全国农作物重大病虫害呈偏重发生态势。其中东亚飞蝗、草地螟、稻飞虱等迁飞性害虫和小麦条锈病等流行性病害将偏重发生;土蝗、
吉安市规模养猪场结合各自特点引进和建设了多种不同技术工艺粪污处理方式,在推广应用中取得了一定的效果, 为了了解各种方式的处理效果,探索效果较好的污水处理工艺,吉安市
轿厢意外移动保护装置含检测子系统、制停子系统和自监测子系统.生产企业可以申请对检测子系统、制停子系统和自监测子系统组成的轿厢意外移动保护装置完整系统进行型式试验,
国内某600 MW机组锅炉经旋流低氮燃烧器改造后.NO,排放浓度明显下降,但在运行中出现了诸多问题.针对改造后突显的再热器壁温超温、锅炉运行两侧氧量偏差变大、高负荷下NOx得
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
This study presents a danger estimation system to prevent accidents among infants.A video camera positioned above the infants crib captures video.The proposed s
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥