In this paper, we developed performance assessment criteria to evaluate effects of compliance to ISPS Code's requirements on port/terminal operation in Nigeria. The primary data for the study were obtained from copie...In this paper, we developed performance assessment criteria to evaluate effects of compliance to ISPS Code's requirements on port/terminal operation in Nigeria. The primary data for the study were obtained from copies ofsurvey questionnaires administered to random sample of port users stratified by areas of specialisation. Hypotheses governing this study were based on the premise that additional port facilities provided and security measures adopted in compliance to ISPS code's requirements would have positive spillover effects on port operations. Evidence from data analysis indicated that compliance to ISPS code had positive effects on performance of operational performance of Nigeria ports. Similar effects were also observed inport users' satisfaction and profitability. The paper contributes by providing decision support framework for ports and terminals. monitoring and gauging outcomes of ISPS code administration in展开更多
针对现有船联网(Internet of Vessels,IOV)路由协议在大数据量传输时网络性能较低的问题,文中提出一种基于到达时间优先的分块传输路由协议DBT-ATP(Data Block Transmission-Arrival Time Priority),该协议通过比较相遇船舶的预计到岸...针对现有船联网(Internet of Vessels,IOV)路由协议在大数据量传输时网络性能较低的问题,文中提出一种基于到达时间优先的分块传输路由协议DBT-ATP(Data Block Transmission-Arrival Time Priority),该协议通过比较相遇船舶的预计到岸时间选择中继节点,采用分块的方式转发大数据量消息。文中针对机会网络传输的特点,提出了归一化网络冗余率作为评价数据传输有效性的指标。仿真结果表明,消息数据量较大时,相比于Epidemic协议,DBT-ATP协议有效提高了消息送达率、减小了消息的传输时延,并且可以降低网络冗余率,是一种高效、节能的船联网路由算法。展开更多
文摘In this paper, we developed performance assessment criteria to evaluate effects of compliance to ISPS Code's requirements on port/terminal operation in Nigeria. The primary data for the study were obtained from copies ofsurvey questionnaires administered to random sample of port users stratified by areas of specialisation. Hypotheses governing this study were based on the premise that additional port facilities provided and security measures adopted in compliance to ISPS code's requirements would have positive spillover effects on port operations. Evidence from data analysis indicated that compliance to ISPS code had positive effects on performance of operational performance of Nigeria ports. Similar effects were also observed inport users' satisfaction and profitability. The paper contributes by providing decision support framework for ports and terminals. monitoring and gauging outcomes of ISPS code administration in
文摘针对现有船联网(Internet of Vessels,IOV)路由协议在大数据量传输时网络性能较低的问题,文中提出一种基于到达时间优先的分块传输路由协议DBT-ATP(Data Block Transmission-Arrival Time Priority),该协议通过比较相遇船舶的预计到岸时间选择中继节点,采用分块的方式转发大数据量消息。文中针对机会网络传输的特点,提出了归一化网络冗余率作为评价数据传输有效性的指标。仿真结果表明,消息数据量较大时,相比于Epidemic协议,DBT-ATP协议有效提高了消息送达率、减小了消息的传输时延,并且可以降低网络冗余率,是一种高效、节能的船联网路由算法。