Web Caching技术和CDN技术及其比较分析

对为提高服务网络质量而出现的一“拉”一“推”两种技术——WebCaching技术和CDN技术作了简要介绍，并从两者各自常见的体系结构出发对两种技术的性能和特点进行了比较分析，结论是CDN技术在减小源服务器负载等方面优于单纯的WebCaching技术；最后指出进一步的研究方向。     

虚拟环境建模中层次细节(LOD)的优化

基于层次结构的动态简化方法，根据视点的变化，提出了优化的求精算法，能够实时连续的转换LOD模型，从而提高虚拟环境中实时仿真的效果，辅助介绍了层次细节技术适用范围。同时对不同简化算法作了比较，给出了一个比较直观的明细表。     

蝶形细分面片的光顺

使用蝶形细分法细分一般的初始控制网格得到的细分面片光滑而不光顺 ,面片的视觉效果很差 ,而运用现有的光顺技术 ,又只能直接光顺细分以后的结果 ,其需要保存的数据不仅量大 ,而且会引入误差 .针对这一问题 ,提出了一种新的光顺方法 ,即通过调整初始网格顶点位置来光顺细分以后的结果 .在添加合适的约束后 ,该方法不仅可以在光顺细分面片的同时 ,降低细分面片和三维真实物体表面之间的逼近误差 ,而且由于最终输出的是初始控制网格 ,故需要保存的数据量小 .     

基于海量数据工程图的几何校正方法研究

针对海量数据工程图在数字化过程中出现的误差较大、处理效率太低的问题，提出了一种基于格网的双线性变换算法结合双缓冲区存取数据技术的新方法，并对双线性变换算法进行了优化。最后将该方法应用于一种具体的海量数据工程图——飞机模线图，实现了对该类图快速、有效的几何校正。     

基于径向基函数多步离散数据插值的人脸变形研究

文章介绍了如何把基于径向基函数多步离散数据插值的方法用在人脸变形技术上,该方法是在对脸部定义的特征点进行分层的基础上,和已知特征点位移的条件下,利用一种基于迭代的插值方法求出特征点周围的网格点位移,从而进行人脸变形。这种方法既保证了脸部局部区域变形的精确性和平滑性,又减少了运算的复杂度。在人脸动画方面该算法也得到了广泛的应用。     

基于模糊控制的自适应有限元网格自动剖分

本文采用模糊控制策略，对有限元网格划分过程中难以控制的因素－网格密度作出自适应控制。同时借鉴先验自适应的思想，在后验控制过程中综合考虑了边界属性的影响，避免了较多层次的网格局部细化与退化，采用此方法，不仅保证了计算精度，而且可以提高运算效率。     

Topological improvement procedures for quadrilateral finite element meshes

This paper presents a set of procedures for improving the topology of unstructured quadrilateral finite element meshes. These procedures are based on the topology of the finite element mesh, and all operations act only on local regions of the mesh. The goal is to optimize the topology such that the smoothing process can produce the best possible element quality. Topological improvement procedures are presented both for elements that are interior to the mesh and for elements connected to the boundary. Also presented is a discussion of efficiency and optimal ordering of the procedures. Several example meshes are included to show the effectiveness of the current approach in improving element qualities in a finite element mesh.     

一种基于单播的大规模Mesh网络容错多播路由新算法

本文基于k-Mesh子网连通的概念提出一种基于局部信息和分布式的Mesh网络容错多播路由算法：该算法的基本思想是把大规模的Mesh网络分成若干个较小的子网，多播消息只在各子网间进行路由，并由各子网独立完成操作。该算法的时间复杂性是线性的，模拟结果表明多播路由算法的多播时间步接近网络的直径。     

Semi-formal design of reliable mesh generation systems

A reliable mesh generation infrastructure is designed based on software engineering principles. Formal methods, software design documents and clear modular decomposition criteria are introduced to improve the quality of mesh generation software. The design document for a simple 2D mesh generation data structure is presented using a semi-formal specification. The proposed semi-formal documentation system avoids any ambiguity during the software design process and will help in driving the software test cases. Using the proposed software, design techniques result in a consistent software design that is easy to extend and modify.     

Effective Ozone Generation in Oxygen Using a Mesh Electrode in an Ozonizer with Variable Linear Velocity

Results of studies on ozone synthesis under discharges proceeding in a metal mesh-ceramic dielectric system have been presented. The experiments were carried out in the reactor with unique reaction space geometry, in which the reacting gas flew with consequently increasing linear velocity. The high voltage electrode was made of a metal mesh, which caused intensification of the gas mixing in the reaction space. Using a simple reactor with one-side cooling of the reaction space, high ozone maximum concentrations (100 g/Nm³) and energy efficiencies (180–200 g/kWh) were obtained at 25 °C.