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AN INDOOR NAVIGATION APPROACH CONSIDERING OBSTACLES AND SPACE SUBDIVISION OF 2D PLAN
Indoor Navigation Obstacles Space Subdivision Navigation Network Shortest Path 2D Plan
2016/11/8
The demand for indoor navigation is increasingly urgent in many applications such as safe management of underground spaces or location services in complex indoor environment, e.g. shopping centres, ai...
The Subdivision of Partial Geo-grid Based on Global Geo-grid Frame
Global Geo-Grid System Partial Geo-Grid District Clipping Hierarchical Data Hexagonal Grid ISEA
2015/10/12
Firstly, start with the application and requirement of Global Geo-Grid System, the paper analyzes the essentiality of generating
partial grids. On the basis of them, the fundermental thought of gene...
SUBDIVISION OF PANTANAL QUATERNARY WETLANDS: MODIS NDVI TIMESERIES IN THE INDIRECT DETECTION OF SEDIMENTS GRANULOMETRY
Vegetation MODIS Geology Comparison Environment Multitemporal TIMESAT
2014/4/30
The Pantanal is the world's largest wetland presenting a variety of ecological sub-regions. The region is characterized by seasonal floods followed by long droughts. At this period, some areas rapidly...
基于非均匀细分的散乱点云数据精简算法（Algorithm of Scattered Point Cloud Data Reduction Based on Non-uniform Subdivision）
逆向工程 散乱点云 非均匀细分
2009/9/25
针对海量散乱点云数据精简问题，提出了基于非均匀细分的精简算法。采用八叉树结构对点云数据进行空间分割，由分割结果建立k邻域。对k邻域内的散乱点进行二次曲面拟合，以拟合曲面的平均曲率为判据决定是否对八叉树空间实行非均匀细分，细分过程中由数据点之间的最大间隔角决定细分程度。构造曲率差函数，识别出边界数据点，对其进行数据保护。该算法对具有曲率多样化特点的点云数据的精简具有实用性，通过实验验证了该算法的可靠...
S-CODE: A Subdivision Based Coding System for CAD Models
Subdivision surfaces Surface fitting Approximation Data compression
2009/8/19
A large scale polygon models are often used to approximately represent 3D CAD models in Digital Engineering environment such as DMU (Digital Mockups) and network based collaborative design. However, t...
Parallel Generation of NC Tool Paths for Subdivision Surfaces
Subdivision surface NC tool path S-Buffer
2009/8/19
The subdivision surface is the limit of recursively refined polyhedral mesh. It is quite intuitive that the multi-resolution feature can be utilized to simplify generation of NC (Numerical Control) to...
Estimating Recursion Depth for Loop Subdivision
Loop surface subdivision recursion depth arbitrary topology bound
2009/8/19
In this paper, an exponential bound of the distance between a Loop subdivision surface and its control mesh is derived based on the topological structure of the control mesh. The exponential bound is ...
A Controllable Ternary Interpolatory Subdivision Scheme
ternary subdivision interpolation Ck-continuity shape controllability
2009/8/19
A non-uniform 3-point ternary interpolatory subdivision scheme with variable subdivision weights is introduced. Its support is computed. The C0 and C1 convergence analysis are presented. To elevate it...
Generalized Scheme for the Interpolation of Arbitrarily Intersecting Curves by Catmull-Clark Subdivision Surfaces
Subdivision Surfaces Interpolation Polygonal Complexes
2009/8/19
This paper presents a scheme for interpolating intersecting uniform cubic B-spline curves by Catmull-Clark subdivision surfaces. The curves are represented by polygonal complexes and the neighborhoods...
Inscribed Approximation based Adaptive Tessellation of Catmull-Clark Subdivision Surfaces
subdivision Catmull-Clark surfaces tessellation surface evaluation
2009/8/19
Catmull-Clark subdivision scheme provides a powerful method for building smooth and complex surfaces. But the number of faces in the uniformly refined meshes increases exponentially with respect to su...
三角网格细分曲面数控加工刀轨快速生成算法（Algorithm of NC Tool Path Generation for Triangular Meshing Subdivision Surface）
三角网格曲面 R*-树 刀轨生成
2009/5/22
提出了一种基于三角网格细分曲面模型的刀轨生成算法，建立三角网格细分曲面模型的空间聚类索引结构，基于该结构实现网格模型与刀轨截面快速、精确求交获取刀触点集，并根据刀触点对应曲面位置处的微分几何性质确定刀位点，采用最小生成树算法对刀位点集排序生成刀轨。实例证明，该算法可有效提高复杂曲面模型的刀轨生成效率及精度。
Shape and Size Optimization of Bottom Part of Ship Structure by Independent Mesh-subdivision Technique with Aide of Multiple Point Constraint
Ship Structure Independent Mesh-subdivision Technique Multiple Point Constraint
2009/3/26
A structure optimization for the initial design of ship is under consideration in this paper. A bulk career is selected for the object of the optimization. Both the shapes and the plate thicknesses ...