The landscape pattern metrics can quantitatively describe the characteristics of landscape pattern and are widely used in various fields of landscape ecology.Due to the lack of vertical information,2D landscape metric...The landscape pattern metrics can quantitatively describe the characteristics of landscape pattern and are widely used in various fields of landscape ecology.Due to the lack of vertical information,2D landscape metrics cannot delineate the vertical characteristics of landscape pattern.Based on the point clouds,a high-resolution voxel model and several voxel-based 3D landscape metrics were constructed in this study and 3D metrics calculation results were compared with that of 2D metrics.The results showed that certain quantifying difference exists between 2D and 3D landscape metrics.For landscapes with different components and spatial configurations,significant difference was disclosed between 2D and 3D landscape metrics.3D metrics can better reflect the real spatial structure characteristics of the landscape than 2D metrics.展开更多
With the advanced development of computer-based enabling technologies, many engineering, medical, biology, chemistry, physics and food science etc have developed to the unprecedented levels, which lead to many researc...With the advanced development of computer-based enabling technologies, many engineering, medical, biology, chemistry, physics and food science etc have developed to the unprecedented levels, which lead to many research and development interests in various multi-discipline areas. Among them, biomimetics is one of the most promising and attractive branches of study. Biomimetics is a branch of study that uses biological systems as a model to develop synthetic systems. To learn from nature, one of the fundamental issues is to understand the natural systems such animals, insects, plants and human beings etc. The geometrical characterization and representation of natural systems is an important fundamental work for biomimetics research. 3D modeling plays a key role in the geometrical characterization and representation, especially in computer graphical visualization. This paper firstly presents the typical procedure of 3D modelling methods and then reviews the previous work of 3D geometrical modelling techniques and systems developed for industrial, medical and animation applications. Especially the paper discusses the problems associated with the existing techniques and systems when they are applied to 3D modelling of biological systems. Based upon the discussions, the paper proposes some areas of research interests in 3D modelling of biological systems and for Biomimetics.展开更多
地震救援现场建筑结构评估是施行生命搜救作业的前提,也是进行安全施救的保障。基于SLAM(Simultaneous localization and mapping,即时定位与地图构建)技术的移动式三维激光扫描仪具有体积小、重量轻、可多平台搭载移动作业等多种优点,...地震救援现场建筑结构评估是施行生命搜救作业的前提,也是进行安全施救的保障。基于SLAM(Simultaneous localization and mapping,即时定位与地图构建)技术的移动式三维激光扫描仪具有体积小、重量轻、可多平台搭载移动作业等多种优点,其“所见即所得”的特点为进行地震救援现场建筑物结构安全评估提供了便利。本文以“应急使命·2023”演习场地和2023年12月18日甘肃积石山6.2级地震现场为例,对移动式三维激光扫描仪在地震救援中的应用进行验证。通过移动式三维激光扫描仪对救援场地进行扫描,获取点云数据开展建模,并对场地的分区布局、建筑类型、建筑结构等特征数据进行提取,在此基础上进行建筑物结构安全评估工作。结果表明基于SLAM技术的移动式三维激光扫描仪具有易于携带、操作简单、作业高效、测量精度高的特点,为地震救援现场开展现场评估工作提供了新的技术方法,具有良好的应用前景。展开更多
文摘The landscape pattern metrics can quantitatively describe the characteristics of landscape pattern and are widely used in various fields of landscape ecology.Due to the lack of vertical information,2D landscape metrics cannot delineate the vertical characteristics of landscape pattern.Based on the point clouds,a high-resolution voxel model and several voxel-based 3D landscape metrics were constructed in this study and 3D metrics calculation results were compared with that of 2D metrics.The results showed that certain quantifying difference exists between 2D and 3D landscape metrics.For landscapes with different components and spatial configurations,significant difference was disclosed between 2D and 3D landscape metrics.3D metrics can better reflect the real spatial structure characteristics of the landscape than 2D metrics.
文摘With the advanced development of computer-based enabling technologies, many engineering, medical, biology, chemistry, physics and food science etc have developed to the unprecedented levels, which lead to many research and development interests in various multi-discipline areas. Among them, biomimetics is one of the most promising and attractive branches of study. Biomimetics is a branch of study that uses biological systems as a model to develop synthetic systems. To learn from nature, one of the fundamental issues is to understand the natural systems such animals, insects, plants and human beings etc. The geometrical characterization and representation of natural systems is an important fundamental work for biomimetics research. 3D modeling plays a key role in the geometrical characterization and representation, especially in computer graphical visualization. This paper firstly presents the typical procedure of 3D modelling methods and then reviews the previous work of 3D geometrical modelling techniques and systems developed for industrial, medical and animation applications. Especially the paper discusses the problems associated with the existing techniques and systems when they are applied to 3D modelling of biological systems. Based upon the discussions, the paper proposes some areas of research interests in 3D modelling of biological systems and for Biomimetics.
文摘地震救援现场建筑结构评估是施行生命搜救作业的前提,也是进行安全施救的保障。基于SLAM(Simultaneous localization and mapping,即时定位与地图构建)技术的移动式三维激光扫描仪具有体积小、重量轻、可多平台搭载移动作业等多种优点,其“所见即所得”的特点为进行地震救援现场建筑物结构安全评估提供了便利。本文以“应急使命·2023”演习场地和2023年12月18日甘肃积石山6.2级地震现场为例,对移动式三维激光扫描仪在地震救援中的应用进行验证。通过移动式三维激光扫描仪对救援场地进行扫描,获取点云数据开展建模,并对场地的分区布局、建筑类型、建筑结构等特征数据进行提取,在此基础上进行建筑物结构安全评估工作。结果表明基于SLAM技术的移动式三维激光扫描仪具有易于携带、操作简单、作业高效、测量精度高的特点,为地震救援现场开展现场评估工作提供了新的技术方法,具有良好的应用前景。
