为了解决科考船对科考仪器主机进行远程控制,同时对视频数据进行远程显示的问题,"雪龙2"号科考破冰船进行了有效的探索。船载实验室采用KVM OVER IP(KVM为Keyboard、Video、Mouse的缩写,数字式多计算机切换器,简称IP KVM)和DV...为了解决科考船对科考仪器主机进行远程控制,同时对视频数据进行远程显示的问题,"雪龙2"号科考破冰船进行了有效的探索。船载实验室采用KVM OVER IP(KVM为Keyboard、Video、Mouse的缩写,数字式多计算机切换器,简称IP KVM)和DVCS(Distributed Video Control System,分布式控制系统,简称DVCS)技术,将科考仪器主机和视频显示系统通过网络连接在一起,实现了在科考船其他位置操作科考仪器主机,同时将需要远程显示的视频数据传输到需要的屏幕上。经过在极地现场的实际应用,两套系统操作方便、系统稳定、视频清晰、维护简单,为现场作业的科考队员提供了便利条件,也得到了科考队员的认可。展开更多
The low frequency line components of the radiated noise from an underwater target usually have both high spectrum level and sustained stability. This feature could be used to increase the detection performance of conv...The low frequency line components of the radiated noise from an underwater target usually have both high spectrum level and sustained stability. This feature could be used to increase the detection performance of conventional broadband energy integration method. The required spectrum level is theoretically discussed when the detection performance of the known line detection is better than that of broadband energy integration method. Under the condition of the target can be detected in line spectrum band, the relationship between the line spectrum level and signal to noise ratio （SNR） is also discussed. This paper proposes a line spectrum target detection method that a matrix using DC jump to fluctuations ratios of sub-band spatial spectrum and beam space output is constructed. This matrix acts as a filter that the line spectrum target with certain frequency and azimuth is passed at most. By fusing with the other sub band results, the conventional detection performance can be improved. At the same time, the applicable condition and detection performance are analyzed in the paper. The simulation and the sea trial data processing results show that the algorithm can effectively extract weak goal line spectrum target under the condition of multi-interference. The algorithm doesn＇t need multi-frame statistics and the detection performance is closer to the optimal line spectrum method.展开更多
文摘为了解决科考船对科考仪器主机进行远程控制,同时对视频数据进行远程显示的问题,"雪龙2"号科考破冰船进行了有效的探索。船载实验室采用KVM OVER IP(KVM为Keyboard、Video、Mouse的缩写,数字式多计算机切换器,简称IP KVM)和DVCS(Distributed Video Control System,分布式控制系统,简称DVCS)技术,将科考仪器主机和视频显示系统通过网络连接在一起,实现了在科考船其他位置操作科考仪器主机,同时将需要远程显示的视频数据传输到需要的屏幕上。经过在极地现场的实际应用,两套系统操作方便、系统稳定、视频清晰、维护简单,为现场作业的科考队员提供了便利条件,也得到了科考队员的认可。
文摘The low frequency line components of the radiated noise from an underwater target usually have both high spectrum level and sustained stability. This feature could be used to increase the detection performance of conventional broadband energy integration method. The required spectrum level is theoretically discussed when the detection performance of the known line detection is better than that of broadband energy integration method. Under the condition of the target can be detected in line spectrum band, the relationship between the line spectrum level and signal to noise ratio （SNR） is also discussed. This paper proposes a line spectrum target detection method that a matrix using DC jump to fluctuations ratios of sub-band spatial spectrum and beam space output is constructed. This matrix acts as a filter that the line spectrum target with certain frequency and azimuth is passed at most. By fusing with the other sub band results, the conventional detection performance can be improved. At the same time, the applicable condition and detection performance are analyzed in the paper. The simulation and the sea trial data processing results show that the algorithm can effectively extract weak goal line spectrum target under the condition of multi-interference. The algorithm doesn＇t need multi-frame statistics and the detection performance is closer to the optimal line spectrum method.
