Key technical innovation of Xihoumen Bridge——the longest steel box gird suspension bridge in the world

All the progress from design to construction of Xihoumen Bridge project and some technical questions were researched, such as design idea considering topography condition, structure choosing considering wind resist and controlling progression of construction considering complex ocean environment, etc. The key technical innovations reached international advanced level.

利用深度森林进行船舶类型分类识别

针对船舶轨迹特征单一、分类的船型有限和利用AIS数据对海上船舶类型分类识别的研究比较欠缺等问题,提出一种基于深度森林(Deep Forest)的船舶类型分类识别方法。首先,该方法提取船舶轨迹段的16个运动特征,提高船舶特征的多样性和辨识度;其次,利用随机森林的重采样技术和特征选取的随机性,构造随机森林作为个体学习器,增强类型分类的鲁棒性;最后,对4个森林集成并串联构成具有自适应迭代层数能力的深度森林,从深度上加强表征学习,提升泛化能力。实验表明,该方法适用于小规模数据集的船舶类型分类识别,对游艇和其他类型的船舶分类效果显著,能够有效提升货船和油轮的分类精度,分类时效性好,并且随着样本库的扩展和模型的优化存在提升空间。