Restoration Abnormal AIS Data Of Inland Water Environment

Digital and intelligent channel is the goal of the development of inland waterway.Complete inland waterway traffic flow information is an important support for realizing the objective of the development of inland waterway.How to get complete traffic flow information increasingly brought to the attention of the people from all walks of life,Automatic positioning System(Automatic Identification System,AIS System for short)is the main way to obtain real-time shipping information.Because of the complicated topography,the crowded strip inland waterway and transmission characteristics of AIS information,compared with the sea,inland AIS system performance has a larger decline.From a mass of receiving AIS data,dynamic information of the AIS will have abnormal data.The existence of abnormal data seriously affected the inland waterway traffic flow information’s completeness.In order to better ensure the completeness of AIS information,the original AIS data object of the Yangtze River waterway Wuhan section is the research object.Research on inland environment abnormal AIS data repair methods.Based on the analysis of different categories of abnormal characteristics of AIS data,the repair model for different abnormal AIS data is put forward.And use the AIS data of ‘Chang Hang Ji Yun 0316 ship’ to repair verification.Specific research contents are as follows:1.Analyses the feature of the AIS abnormal data and classify abnormal data.Respectively from the correctness of the data,data loss time,AIS berth type three aspects carries on the analysis,clearly the main influencing factors of abnormal data on define different categories.And get the quantitative data of characteristics of the anomaly data.2.Research of repair model of abnormal AIS data.According to the characteristics of the different categories abnormal AIS data,research the appropriate repair methods.On this basis,determine different types of AIS data repair model with the repair process.3.Verification and performance analysis of the repair model.In order to verify the feasibility of the repair model,to repair of abnormal data in actual AIS data,further analysis the repair model performance.The repair methods of abnormal AIS data in inland water environmen is important for ensuring quality of AIS data and building inland river comprehensive traffic flow data.It can be applied to marine traffic flow investigation,digital channel and channel construction and navigation capacity of waterway,etc.