A new approach to the detection of concealed nuclear weapons and fissile material aboard cargo containerships is proposed. The ship-based approach removes the constraints of current thinking by addressing the threat of containerized nuclear terror in a novel way. Critical tactical misjudgments exist in currently deployed detection systems, which expose U.S. cities to an act of nuclear terrorism...

In port surveillance, video-based monitoring is a valuable supplement to a radar system by helping to detect smaller ships in the shadow of a larger ship and with the possibility to detect nonmetal ships. Therefore, automatic video-based ship detection is an important research area for security control in port regions. An approach that automatically detects moving ships in port surveillance vid...

With the development of navigation globalization and ship dehumanization, contradiction between increasing demand for behavior supervision limited traffic service resources is obvious, frequent occurrence accidents at sea a problem. The monitoring abnormal an important link in maritime transportation. popularization automatic identification system research field, AIS widely used management stat...

In order to realize the real-time detection of an unmanned fishing speedboat near a ship ahead, perception platform based on target visual system was established. By controlling depth and width model analyze compare training, it found that 5S had fast speed but low accuracy, which judged be insufficient for detecting small targets. this regard, study improved YOLOv5s algorithm, in initial frame...