为了避免或者减少定位点路径偏差,本文研究运用POSTGIS系统的空间函数功能,编程实现"GPS定位点路径偏离调整算法(Snap to lines算法)",对规模庞大的车辆行程轨迹点数据进行合理的自动调整,取得了很好的效果,不仅可以有效减少...为了避免或者减少定位点路径偏差,本文研究运用POSTGIS系统的空间函数功能,编程实现"GPS定位点路径偏离调整算法(Snap to lines算法)",对规模庞大的车辆行程轨迹点数据进行合理的自动调整,取得了很好的效果,不仅可以有效减少偏差点,而且在一定情况下甚至可以避免偏差的出现,从而使项目采集的实验数据能够应用于整个LAVIA系统的分析与评估。展开更多
Starting from a Backlund transformation and taking a special ansatz for the function f, we can obtain a much more generalexpression of solution that includes some variable separated functions for the higher-order Broe...Starting from a Backlund transformation and taking a special ansatz for the function f, we can obtain a much more generalexpression of solution that includes some variable separated functions for the higher-order Broer-Kaup system. From this expression, we investigate the interactions of localized coherent structures such as the multi-solitonic excitations and find the novel phenomenon that their interactions have non-elastic behavior because the fission/fusion may occur after the interaction of each localized coherent structure.展开更多
文摘为了避免或者减少定位点路径偏差,本文研究运用POSTGIS系统的空间函数功能,编程实现"GPS定位点路径偏离调整算法(Snap to lines算法)",对规模庞大的车辆行程轨迹点数据进行合理的自动调整,取得了很好的效果,不仅可以有效减少偏差点,而且在一定情况下甚至可以避免偏差的出现,从而使项目采集的实验数据能够应用于整个LAVIA系统的分析与评估。
文摘Starting from a Backlund transformation and taking a special ansatz for the function f, we can obtain a much more generalexpression of solution that includes some variable separated functions for the higher-order Broer-Kaup system. From this expression, we investigate the interactions of localized coherent structures such as the multi-solitonic excitations and find the novel phenomenon that their interactions have non-elastic behavior because the fission/fusion may occur after the interaction of each localized coherent structure.