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- Title
Trajectory Data Compression Algorithm Based on Ship Navigation State and Acceleration Variation.
- Authors
Gao, Junbo; Cai, Ze; Yu, Wangjing; Sun, Wei
- Abstract
An active area of study under the dual carbon target, which is based on automatic identification systems (AIS), is the emission inventory of pollutants from ships. Data compression is required because there is currently so much data that it has become difficult to transmit, process, and store it. A trajectory simplification method considering the ship sailing state and acceleration rate of change is developed in this paper to assure the validity of the compressed data used in the emission inventory analysis. By carefully examining the integral relationship between acceleration and pollution emissions, the algorithm constructs an acceleration rate of change function for data compression and categorizes AIS data by ship navigation status. By dynamically altering the amount of acceleration change, the developed function can stabilize the pollutant emission calculation error and adaptively calculate the threshold value. The experimental results show that the emission calculation error of the proposed algorithm is only 0.185% when the compression rate is 90.28%.
- Subjects
DATA compression; NAVIGATION in shipping; DERIVATIVES (Mathematics); EMISSION inventories; AUTOMATIC identification; SAILING ships
- Publication
Journal of Marine Science & Engineering, 2023, Vol 11, Issue 1, p216
- ISSN
2077-1312
- Publication type
Article
- DOI
10.3390/jmse11010216