Abstract
In this paper, according to the water area of light buoy, the migration rule of light buoy in main channel is counted, and the frequency of light buoy passing through a certain position point in the process of migration is calculated, and the model is verified by buoy position data. An anomaly detection algorithm based on improved adaptive DBSCAN clustering is designed. The size of the ε neighborhood is adaptive according to the wind speed, wave height, and drift distance span of the water area where the light buoy is located. The experimental results show that the improved adaptive DBSCAN clustering algorithm can solve the problem that the common DBSCAN clustering algorithm takes the “hot” water area of the light buoy position or the most likely area in the light buoy migration process as the noise point.
Highlights
Mathematical Problems in Engineering system, which can measure the water surface elevation from almost any point in the world [5]
Wang and Lin proposed an improved adaptive parameter density clustering algorithm, which uses kernel density estimation to determine the reasonable interval of EPS and minPts parameters [13]
90 78.9 85.56 96.68 63.34 54.45 67.7 67.7 73.2 74.4 73.3 83.3 66.6 67.7 97.7 98.1 77.7 99.7 73.3 light buoy is located, an anomaly detection algorithm based on improved adaptive DBSCAN clustering is designed. e size of the ε neighborhood is adaptive according to the wind speed, wave height, and drift distance span of the water area where the light buoy is located
Summary
The frequency of Xiamen Bay light buoy at different position points is counted, and the center coordinates of geometric shapes of each light buoy position data set containing no less than 80% position data points are calculated. On this basis, the characteristics of light buoy offset are analyzed. Under the action of wind, current, ship traveling wave, and other external forces, the deviation direction of each light buoy may have different “preferences”; that is, it will move in a small area of water in more time. Due to the shelter of these islands, the influence of wind on buoy deviation will be weakened. is makes the influence of wind on the light buoy in the outer harbour greater than that in the inner one
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