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Due to the complex nature of multi-source geological data, it is difficult to rebuild every geological struc-ture through a single 3D modeling method. The multi-source data interpretation method put forward in this analysis is based on a database-driven pattern and focuses on the discrete and irregular features of geological data. The geological data from a variety of sources covering a range of accuracy, resolution, quantity and quality are classified and inte-grated according to their reliability and consistency for 3D modeling. The new interpolation-approximation fitting construction algorithm of geological surfaces with the non-uniform rational B-spline （NURBS） technique is then pre-sented. The NURBS technique can retain the balance among the requirements for accuracy, surface continuity and data storage of geological structures. Finally, four alternative 3D modeling approaches are demonstrated with reference to some examples, which are selected according to the data quantity and accuracy specification. The proposed approaches offer flexible modeling patterns for different practical engineering demands. 相似文献
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在历代名篇中,《滕王阁序》实在是一篇名句迭出、脍炙人口的美文。怎样让这流传千古的美文激起学生兴趣？怎样理解作者蕴藏在文中的复杂感情？怎样让学生学得愉快,情人文中？教学中,我抓住文章名句丰富多彩这一特点,尝试通过名句梳理文章思路,着力培养学生文学鉴赏能力。课堂上高潮迭起,学生们兴致盎然。 相似文献
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