查询词典 reconstruction

The shortest path approximation algorithm builds a weighted graph from the given set of scattered points using the distribution of these data points. By computing the shortest path in the weighted graph, the problem of curve reconstruction from scattered data points is transformed into that of curve reconstruction from a set of ordered data points.

最短路逼近算法首次将图论中最短路径理论引入到曲线重建中，根据散乱数据点的分布构造带权连通图，通过求解带权连通图的最短路径，将散乱数据点集的曲线重建问题转化为有序数据点集的曲线重建问题。

With a method of series expansion for image reconstruction, there exists great difficulties in terms of slow reconstruction due to bulk data to deal with.

摘要由投影重建图像的迭代算法有抑制噪声等优点，但其投影矩阵的计算量大、影响重建速度。

This paper studies the reconstruction of the 3D solidi model based on ICT slicing and presents a new edge matching method and a reconstruction method of solid-model based on surface identification, Volume cell construction and volume mergence.

研究了基于工业CT 切片图形的实体模型三维重构技术，讨论了边界配准技术，提出了基于表面识别、通过逐层体元构造和体元粘合来构造实体几何模型的重建思想，并给出了一个成功的重构实

As reconstruction of a 2-D image on a spherical surface actually creates a three dimensional (3-D) displays, this technique may plays an important role in attempts at reconstruction of 3-D images from CGHs.

募扑慊D？二维图像重现于球面实际上了产生三维显示，因此上述方法在从计算全息图重现三维图像方面起到重要的作用。

Results:① Thin-slice reconstruction, MPR and VR provided higher detecting rate of small peripheral pulmonary adenocarcinonia signs than conventional axial images, including lobulation, spiculation, pleural indentation and bronchovascular convergence;② MPR and VR was superior to axial thin-slice reconstruction in judging the presence of the vacuolar sign, air-bronchogram and bronchovascular convergence.

结果：①64层CT薄层重建、MPR及VR在显示肺小腺癌的分叶征、毛刺征、胸膜凹陷征及支气管血管集束征方面优于常规横断面；②MPR及VR对于空泡征、支气管气相和支气管血管集束征的判别有优势。

After analysing functions and basic theory of Surfacer and studying key technology of object reverse engineering of complex parts, author expatiates data capture, data processing and surface reconstruction and summarizes methods and steps of surface reconstruction.

本文通过对逆向工程软件Surfacer的功能和基本原理的分析，研究了复杂曲面实物逆向工程的关键技术，对逆向工程中的数据获取、数据处理和曲面重构技术进行了详细阐述，总结了Surfacer在曲面重构中的方法、步骤和技巧。

Objective: To study the clinical application of 16-slice spiral CT's multiplanar reconstruction and three Dimension (3D) reconstruction images in evaluation of talus fractures.

目的：研究16层螺旋CT多平面、三维（3D）重建在距骨骨折中的临床应用价值。

In chapter 4, basing theories and methods of scientific visualization, and artificial neural network BP algorithm, we integrate the Visual C++, OpenGL graphics library and Excel VBA technique to develop the program of artificial neural network and to make the BP algorithm visually, this program works can be divided into four parts: Using C language to develop program about BP algorithm; Using Visual C++, develop the GUI Interface, make input parameter visually; Using OpenGL graphic technique to display the training sample point in three dimension; at last using Excel DDE technique display the error graphic tables in Excel system In chapter 5, on the view of engineering application, we establish new method of surface reconstruction basing artificial neural network, develop interface program between module and commercial CAD/CAM system, meantime deeply discuss some key problems, for example, setting up the base plane, using the API technique, cutting and editing surface boundary, and also discuss the more compliant problem: how to intersect surface, at end we finish the work of translation from our surface reconstruction module to commercial CAD/CAM system, then make reverse engineering system basing artificial neural network more useful.

第四章基于科学计算可视化理论，依据人工神经网络BP算法理论模型，综合Visual C++，OpenGL图形库以及Excel VBA等多项软件开发技术，编制了人工神经网络程序，实现了BP算法的可视化映射。具体工作分为四部分：利用C语言实现人工神经网络BP算法；利用VisualC++的GUI技术开发图形用户界面，实现参数设置可视化；利用OpenGL图形技术进行三维映射，显示学习样本及训练样本点；利用微软电子表格DDE动态数据交换技术，在Excel上动态显示学习误差曲线图。第五章从工程应用的角度出发，提出了一种新的基于人工神经网络算法的曲面裁剪重构方法，完成了曲面重建模块与通用CAD/CAM系统的接口设计工作，对其中的若干关键问题进行了深入讨论，例如基平面设定、API技术的应用、边界裁剪等问题，同时，对曲面计算中较为困难的曲面相交问题也进行的专门探讨，最终完成了曲面重建模块向CAD/CAM系统的数据传输工作，使人工神经网络逆向工程系统趋向实用。

The calculation of wavelet and scalar function coefficients at the process of decomposition of triangular mesh, the choice of wavelet coefficient threshold and the calculation of scalar function coefficient at the reconstruction process are introduced in this dissertation. The multiresolution decomposition, compression and reconstruction of triangular mesh with subdivision connectivity are realized.

关于细分连续三角网格的多分辨分解、压缩与重构，本文介绍了细分连续三角网格分解过程中小波系数及尺度函数系数的计算、小波系数的阈值选取和重构过程中尺度函数系数的计算，并给予了实现，获得较好的压缩性能和质量。

This paper studied deeply on 3D reconstruction and visualization. Based on the detailed analysis of the MC algorithm, which is used for extracting Iso-surface from volume data field, this paper presented a new method of directional smoothing and triangular curved surface reconstruction.

为了在微机上实现较好的三维重建效果与理想的交互显示速度，本文主要研究内容和结论如下：首先，对三维重建与可视化技术进行了深入研究，在对用于从体数据场提取等值面的经典MC算法深入分析的基础上，提出了等值面方向平滑处理与三角B－B曲面重构方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。