Geological applications often need displaying of the shape, structure and spatial distribution of underground rock through exploring the geological survey database. In this paper, we present an approach for interactiv...
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(纸本)9781424452446
Geological applications often need displaying of the shape, structure and spatial distribution of underground rock through exploring the geological survey database. In this paper, we present an approach for interactive modeling and visualization of three-dimensional (3D) Geological Bodies. A Hybrid 3D data model based on multi-DEMs and tri-prism volume is introduced for depicting the 3D Geological Bodies, and a specific conforming Delauny triangulation algorithm(CDT) for dealing with irregular geological boundaries and the optimization of the geological interface mesh is introduced. We have evaluated our approaches by applying it in a borehole-based geological visualization system to represent 3D geographical bodies with powerful capability for display, query, and analysis.
For the model of learning, Most of the information of relevant professional beginners are difficult to adapt to the training of the model structure. In the early learning students should focus on the cultivation of th...
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For the model of learning, Most of the information of relevant professional beginners are difficult to adapt to the training of the model structure. In the early learning students should focus on the cultivation of thinking structure, visual modeling study is conducive to the strengthening of the relevant professional structured learning and understanding. Nowadays Study on the visualization of teaching are few all over the world, visualization technology is often manifested as data visualization, but the visualization model of image network still remain at the theoretical level. In order to meet the requirements of teaching at present, we design and build the network platform of visual modeling training. Take advantage of the network script language, Moodle and Mxgraph, which have the correlation of modelling, the platform is developed in the server environment. The modeling steps platform record students, in order to guide the development of structured programming thinking, to help the designer to master and practice model.
Fast and accurate simulation of multicore systems requires a parallelized simulator. This paper describes a novel method to build parallelizable and cycle-accurate-capable functional-first simulators of multicore targ...
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Fast and accurate simulation of multicore systems requires a parallelized simulator. This paper describes a novel method to build parallelizable and cycle-accurate-capable functional-first simulators of multicore targets.
Handling the evolving permanent contact of deformable objects leads to a collision detection problem of high computing cost. Situations in which this type of contact happens are becoming more and more present with the...
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Handling the evolving permanent contact of deformable objects leads to a collision detection problem of high computing cost. Situations in which this type of contact happens are becoming more and more present with the increasing complexity of virtual human models, especially for the emerging medical applications. In this context, we propose a novel collision detection approach to deal with situations in which soft structures are in constant but dynamic contact, which is typical of 3D biological elements. Our method proceeds in two stages: First, in a preprocessing stage, a mesh is chosen under certain conditions as a reference mesh and is spherically sampled. In the collision detection stage, the resulting table is exploited for each vertex of the other mesh to obtain, in constant time, its signed distance to the fixed mesh. The two working hypotheses for this approach to succeed are typical of the deforming anatomical systems we target: First, the two meshes retain a layered configuration with respect to a central point and, second, the fixed mesh tangential deformation is bounded by the spherical sampling resolution. Within this context, the proposed approach can handle large relative displacements, reorientations, and deformations of the mobile mesh. We illustrate our method in comparison with other techniques on a biomechanical model of the human hip joint.
The problem of projecting multidimensional data into lower dimensions has been pursued by many researchers due to its potential application to data analyses of various kinds. This paper presents a novel multidimension...
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The problem of projecting multidimensional data into lower dimensions has been pursued by many researchers due to its potential application to data analyses of various kinds. This paper presents a novel multidimensional projection technique based on least square approximations. The approximations compute the coordinates of a set of projected points based on the coordinates of a reduced number of control points with defined geometry. We name the technique Least Square Projections ( LSP). From an initial projection of the control points, LSP defines the positioning of their neighboring points through a numerical solution that aims at preserving a similarity relationship between the points given by a metric in mD. In order to perform the projection, a small number of distance calculations are necessary, and no repositioning of the points is required to obtain a final solution with satisfactory precision. The results show the capability of the technique to form groups of points by degree of similarity in 2D. We illustrate that capability through its application to mapping collections of textual documents from varied sources, a strategic yet difficult application. LSP is faster and more accurate than other existing high-quality methods, particularly where it was mostly tested, that is, for mapping text sets.
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