为实现航路线在电子海图和雷达间的连接与传递,分析通导设备电子海图显示与信息系统(Electronic Chart Display and Information System,ECDIS)电子海图航路线语句格式及相关的采集、转换和传输用接口技术。针对JAN901B电子海图不能直...为实现航路线在电子海图和雷达间的连接与传递,分析通导设备电子海图显示与信息系统(Electronic Chart Display and Information System,ECDIS)电子海图航路线语句格式及相关的采集、转换和传输用接口技术。针对JAN901B电子海图不能直接通过USB口向KH雷达输出航路线的问题,提出软硬件解决方案,并成功应用于JAN901B电子海图到KH雷达的航路线传递中。展开更多
The logistics routes allocation discusses optimal routing from origin to destination through distribution center （DC） on condition that both transport and distribution cost should be taken into account. The problem ...The logistics routes allocation discusses optimal routing from origin to destination through distribution center （DC） on condition that both transport and distribution cost should be taken into account. The problem can be solved by the iterative non-linear programming （INLP）, in which the transport cost and distribution cost are assumed to be linear and non-linear, respectively. The method works well in most situations. However, when the distribution cost predominates in the total cost, the method falls, and the solution given by the method is not a global minimum but a local minimum. Further study reveals that the INLP method is still a kind of transport routing method like vehicle routing problem （VRP）, and the failure of the method must happen when the distribution cost is a major one. On such a condition, further computation on other extreme points, which physically means forcing all routes to pass through one DC one by one, should be carried out. By comparing values on these extreme points, the global optimal solution can be got. The method has both theoretical and practical meaning. In theoretical field, it might force us to seek new method; in practice, it reminds us to do such kind of check when the transport distance is short and warehousing work is major that often happens in local consolidation center or de-vanning center.展开更多
文摘为实现航路线在电子海图和雷达间的连接与传递,分析通导设备电子海图显示与信息系统(Electronic Chart Display and Information System,ECDIS)电子海图航路线语句格式及相关的采集、转换和传输用接口技术。针对JAN901B电子海图不能直接通过USB口向KH雷达输出航路线的问题,提出软硬件解决方案,并成功应用于JAN901B电子海图到KH雷达的航路线传递中。
基金the National Science Foundation,Ministry of Education and Science, Japan (No. 17330089)
文摘The logistics routes allocation discusses optimal routing from origin to destination through distribution center （DC） on condition that both transport and distribution cost should be taken into account. The problem can be solved by the iterative non-linear programming （INLP）, in which the transport cost and distribution cost are assumed to be linear and non-linear, respectively. The method works well in most situations. However, when the distribution cost predominates in the total cost, the method falls, and the solution given by the method is not a global minimum but a local minimum. Further study reveals that the INLP method is still a kind of transport routing method like vehicle routing problem （VRP）, and the failure of the method must happen when the distribution cost is a major one. On such a condition, further computation on other extreme points, which physically means forcing all routes to pass through one DC one by one, should be carried out. By comparing values on these extreme points, the global optimal solution can be got. The method has both theoretical and practical meaning. In theoretical field, it might force us to seek new method; in practice, it reminds us to do such kind of check when the transport distance is short and warehousing work is major that often happens in local consolidation center or de-vanning center.
