The Study On The Speed Limitations Of Vessels In The Port

As ports develop and China’s opening up constantly deepens, port throughput and traffic volume entering or leaving the port increases, most ships become bigger and faster recently, which results in the traffic density increasing in ports. Vessel speed limit in harbor has been unable to meet navigational safety of the harbor as well as "green shipping" needs. Therefore, this paper analyzes the impact speed of the ship in the harbor on the basis of the main port of factors, established based on principal component analysis-the Inner Harbor Speed SVM Model ship for testing and evaluation of new port speed limit value.Respect the vessel speed limit indicator system in the harbor, the paper mainly illustrates from protecting the safety of navigation and improving the efficiency of port operations. Therefore, the impact of the vessel speed limit in harbor would be analyzed from the natural environment in the harbor, harbor traffic environment and harbor traffic conditions, through qualitative and quantitative analysis of a total of 13 specific initial screening evaluation.The vessel speed limit in harbor model, firstly to further evaluation, mainly analysis 13 indicators to reduce the dimension. There are six key indicators left after dimensionality reduction, which have the most effect on the port speed and a small degree of interconnected, by using PCA (principal component analysis). Then, to analyze the main indicators, it uses the model of ε-SVR SVM to regress sample data obtained after dimensionality reduction. A new regression model that can be used to calculate, test and evaluate the new vessel speed limit values in the harbor is determined to provide a theoretical basis for revising the values by the port authorities.