为更好地监测船舶动态和船舶在港口的作业情况,通过对K-Means算法和DBSCAN(Density-Based Spatial Clustering of Applications with Noise)密度聚类算法进行对比,选择DBSCAN密度聚类算法对港口泊位进行聚类,对港口泊位的位置和大小进...为更好地监测船舶动态和船舶在港口的作业情况,通过对K-Means算法和DBSCAN(Density-Based Spatial Clustering of Applications with Noise)密度聚类算法进行对比,选择DBSCAN密度聚类算法对港口泊位进行聚类,对港口泊位的位置和大小进行识别。基于船舶自动识别系统(Automatic Identification System,AIS)历史数据、船舶动态信息和船舶基础信息,采用DBSCAN密度聚类算法对全球4079个港口的泊位进行自动识别,得出泊位的位置、方向、岸线长度和类型等信息。将聚类结果与真实泊位信息相对比,结果表明,聚类结果的误差很小,证明该算法是有效的。计算结果可用于实时跟踪船舶在港作业动态,分析泊位历史作业情况,为港航基于数据的协同优化提供参考。展开更多
Some new innovative constructions and piling technologies for improvement of offshore and port berthing structures are worked out and discussed. The aims of innovations are to decrease required power of construction ...Some new innovative constructions and piling technologies for improvement of offshore and port berthing structures are worked out and discussed. The aims of innovations are to decrease required power of construction （in particular, piling） equipment and, correspondingly, to improve environmental situation at the construction site. Another achieved goal is providing long tubular piles installation in hard soils conditions without application of very heavy and powerful driving machines. Worked out solutions are based on two approaches. One of them provides separate loading of driving force on pile＇s shaft and pile＇s tip concentrating the whole driving force on one of the mentioned parts of the pile. Another approach is focused on prevention of soil plug formation inside of the tubular pile tip facilitating the pile installation process. Also improved anchorage system for sheet piling seafront walls is presented and discussed. All considered innovations are patented and can be used in wide range of marine, offshore, coastal and harbor structures.展开更多
文摘为更好地监测船舶动态和船舶在港口的作业情况,通过对K-Means算法和DBSCAN(Density-Based Spatial Clustering of Applications with Noise)密度聚类算法进行对比,选择DBSCAN密度聚类算法对港口泊位进行聚类,对港口泊位的位置和大小进行识别。基于船舶自动识别系统(Automatic Identification System,AIS)历史数据、船舶动态信息和船舶基础信息,采用DBSCAN密度聚类算法对全球4079个港口的泊位进行自动识别,得出泊位的位置、方向、岸线长度和类型等信息。将聚类结果与真实泊位信息相对比,结果表明,聚类结果的误差很小,证明该算法是有效的。计算结果可用于实时跟踪船舶在港作业动态,分析泊位历史作业情况,为港航基于数据的协同优化提供参考。
文摘Some new innovative constructions and piling technologies for improvement of offshore and port berthing structures are worked out and discussed. The aims of innovations are to decrease required power of construction （in particular, piling） equipment and, correspondingly, to improve environmental situation at the construction site. Another achieved goal is providing long tubular piles installation in hard soils conditions without application of very heavy and powerful driving machines. Worked out solutions are based on two approaches. One of them provides separate loading of driving force on pile＇s shaft and pile＇s tip concentrating the whole driving force on one of the mentioned parts of the pile. Another approach is focused on prevention of soil plug formation inside of the tubular pile tip facilitating the pile installation process. Also improved anchorage system for sheet piling seafront walls is presented and discussed. All considered innovations are patented and can be used in wide range of marine, offshore, coastal and harbor structures.
