南通大学信息检索第三次作业分析.doc

研15机械、电气第三次作业?? 提示：请同学们新建一个word文档，将word文档的文件名以你的“班级 学号 姓名第三次作业”的格式命名，然后按照题目顺序依次在word文档里作答，注意随时保存你的作业内容，待检查无误后以e-mail的形式发至9861LPL@163.com，邮件的主题处也须注明你的“班级 学号 姓名 第三次作业”。（注意：发送邮件之前请在自己的邮箱中保存一份，以便留底备查。） 一、请利用我校图书馆主页上的Elsevier ScienceDirect数据库进行检索： 1、通过主题浏览方式（Browse publications by subject），查找你所学专业的图书和期刊，任选其中一种期刊，选择其近三年的某一期，复制其中你感兴趣的一篇论文的题录、摘要及正文第一段。 答： 2014 AASRI Conference on Circuit and Signal Processing (CSP 2014) Three-Dimensional Reconstruction from Projections Based On Incidence Matrices of Patterns Zakharov Alexei, Zhiznyakov Arkady* Murom Institut, Vladimir State University, Murom, 602264, Russian Federation Abstract Task of automatic reconstruction of three-dimensional objects by drawing views presented. The algorithm based on a boundary representation of three-dimensional models. The algorithm consists of the following steps: automatic separation of the drawing per the views, determination of three-dimensional coordinates of vertices, definition and marking of wire model primitives, reconstruction of model faces and model elements. The fundamental concept of the algorithm is to find the structural elements of three-dimensional model with usage of pre-specified patterns. The templates are described by means of matrices. Matching algorithm uses invariants: the number of vertices, type of edges. 2014 Zakharov A.A., Zhiznyakov A.L. Published by Elsevier B.V. Selection and/or peer review under responsibility of American Applied Science Research Institute Keywords: three-dimensional reconstruction, CAD-system, incidence matrix. 1. Introduction For the moment, a large number of the technical drawings, submitted in both paper and electronic form are accumulated in the archives of the enterprises. An additional point is that the development of many objects often begins with the drawing instead of three-dimensional model usage. Two-dimensional drawings are oftendifficult to understand, they are inconvenient to update and the ones can not serve as a basis for further d