Some problems connect ed with production of new light-weight filler type are considered for sandwich layers. Constructively, the filler is the folded structure that can be developed on a plane. This feature makes it...Some problems connect ed with production of new light-weight filler type are considered for sandwich layers. Constructively, the filler is the folded structure that can be developed on a plane. This feature makes it possible to produce the filler by isometric t ransformation of thin sheet through local bending without material stretching.Th e main difficulty is that the bending must be carried out along all lines of com plex-shaped marking-out at a time. The problem of shaping can be solved by use of the original shaping device that can be transformed in operation. The herein -presented technology of production makes it possible to fabricate parts with d eep relief using a wide gamut of different materials even as the thin-sheet met al alloys and paper.展开更多
为了提高运动目标轨迹分类的准确性,该文综合考虑了轨迹的位置信息和方向信息,提出了一种结合Hausdorff距离和最长公共子序列(Longest Common SubSequence,LCSS)的轨迹分类算法。该算法首先采用改进的Hausdorff距离对轨迹的位置信息进...为了提高运动目标轨迹分类的准确性,该文综合考虑了轨迹的位置信息和方向信息,提出了一种结合Hausdorff距离和最长公共子序列(Longest Common SubSequence,LCSS)的轨迹分类算法。该算法首先采用改进的Hausdorff距离对轨迹的位置信息进行相似性测量,然后采用改进的LCSS算法对轨迹的方向信息进行相似性测量。与其他轨迹聚类算法不同,该算法融合了Hausdorff距离和LCSS两种算法的优点,提高了轨迹分类的准确性。此外,为了进一步降低计算复杂度,该文还实现了一种基于插值的保距变换算法和一种LCSS快速算法。实验结果表明,该轨迹分类算法可以明显提高轨迹的聚类准确率,聚类准确率可达到96%;基于插值的保距变换算法和LCSS快速算法可以很大程度上降低算法的计算复杂度,下降幅度最大可达到80%。该方法可以同时满足轨迹分类对精确度、实时性和鲁棒性的要求。展开更多
文摘Some problems connect ed with production of new light-weight filler type are considered for sandwich layers. Constructively, the filler is the folded structure that can be developed on a plane. This feature makes it possible to produce the filler by isometric t ransformation of thin sheet through local bending without material stretching.Th e main difficulty is that the bending must be carried out along all lines of com plex-shaped marking-out at a time. The problem of shaping can be solved by use of the original shaping device that can be transformed in operation. The herein -presented technology of production makes it possible to fabricate parts with d eep relief using a wide gamut of different materials even as the thin-sheet met al alloys and paper.
文摘为了提高运动目标轨迹分类的准确性,该文综合考虑了轨迹的位置信息和方向信息,提出了一种结合Hausdorff距离和最长公共子序列(Longest Common SubSequence,LCSS)的轨迹分类算法。该算法首先采用改进的Hausdorff距离对轨迹的位置信息进行相似性测量,然后采用改进的LCSS算法对轨迹的方向信息进行相似性测量。与其他轨迹聚类算法不同,该算法融合了Hausdorff距离和LCSS两种算法的优点,提高了轨迹分类的准确性。此外,为了进一步降低计算复杂度,该文还实现了一种基于插值的保距变换算法和一种LCSS快速算法。实验结果表明,该轨迹分类算法可以明显提高轨迹的聚类准确率,聚类准确率可达到96%;基于插值的保距变换算法和LCSS快速算法可以很大程度上降低算法的计算复杂度,下降幅度最大可达到80%。该方法可以同时满足轨迹分类对精确度、实时性和鲁棒性的要求。
