一种深度图像中的表面曲率估计算法

曲率估计在深度图像分析中占有重要地位,传统的有限差分或局部拟合方法未考虑到表面上可能出现的不连续性,因而会不可避免地出现错误,为了得到有效可靠的曲率估计,本文提出了基于自适应局部表面拟合和鲁棒最大似然的估计的曲率估计算法,首先,提出曲面是分片光滑的假设,表面曲率需从该像素所属的光滑曲面片来估计,其次,定义了能量函数来度量拟合窗的平滑度,在局部表面拟合时,依据最小化能量函数的原则来自适应移动拟合窗的中心,以使拟合窗达到最“光滑”,最后,采用鲁棒最大似然估计以消除仍然存在的“局外点”的影响,理论分析和实验结果证明估计算法是稳健,可靠,有效的且计算复杂度小。     

多数据库系统中局部代理技术研究

提出了在多数据库系统中使用局部代理技术的方法 ,并且详细介绍了自行研制的多数据库 Panorama系统中的局部代理设计     

基于几何特征和力学特性的自适应网格生成算法

为获得适合有限元分析的满意网格划分,提出了平面域的基于几何特征和力学特性相结合的自适应网络生成方法,实现了应力集中区的网格局部加密及平稳变密度的网格自动剖分,通过实例表明本方法实用性强、效果良好。     

Data Refinement of Remote Procedures

Recently the action systems formalism for parallel and distributed systems has been extended with the procedure mechanism. This gives us a very general framework for describing different communication paradigms for action systems, e.g. remote procedure calls. Action systems come with a design methodology based on the refinement calculus. Data refinement is a powerful technique for refining action systems. In this paper we will develop a theory and proof rules for the refinement of action systems that communicate via remote procedures based on the data refinement approach. The proof rules we develop are compositional so that modular refinement of action systems is supported. As an example we will especially study the atomicity refinement of actions. This is an important refinement strategy, as it potentially increases the degree of parallelism in an action system. Received February 1999 / Accepted in revised form July 2000     

Industrial Robot Navigation and Obstacle Avoidance Employing Fuzzy Logic

This paper proposes a novel conceptual approach based on fuzzy logic to solve the local navigation and obstacle avoidance problem for industrial 3-dof robotic manipulators. The proposed system is divided into separate fuzzy units, which control individually each manipulator link. The fuzzy rule-base of each unit combines a repelling influence, which is related to the distance between the manipulator and the nearby obstacles, with the attracting influence produced by the angular difference, between the actual and the final manipulator configuration, to generate a new actuating command for each link. It can be considered as an on-line local navigation method for the generation of instantaneous collision-free trajectories. The strategy has been successfully applied to manipulators in different simulated workspace environments providing collision-free paths. Some of the simulation results obtained are included.     

网络化财务信息查询系统的设计

为适应高校经济体制改革的需要 ,必须建立网络化的财务查询系统 ,以促进学校经济的管理方法更有效 ,管理决策更优化。通过对该系统总体方案和结构设计的描述 ,介绍了基于IDC技术、采用B/S结构的网络化财务查询系统的设计构想和程序设计原理。     

局域网防火墙的设计与实现

本文设计与实现了局域网防火墙。首先阐述了防火墙的原理,然后分析防火墙系统总体设计,最后论述防火墙的设计与实现,并详述其具体实现的各个模块。     

A TLP approach for BGP based on local speculation

With the explosive growth of Internet, the low efficiency of BGP has seriously influenced its usability. In this work, a TLP （thread level parallelism） approach with local speculation is proposed to improve the BGP performance. The thread partition is locally performed on each separated sub-module at route processing, and the speculation strategy is implemented to guarantee the memory consistency and sequential commit. Experiments on Intel Quad-core server show that this approach reaches an average speedup of 1.46 under single peer, multi-peers and route flapping. It is also shown that the packet throughput can be improved greatly under multiple sessions by taking advantage of TLP.     

运用EXCEL函数进行拉丁方设计

拉丁方设计是科学试验和加工工艺研究中经常用到的试验设计方法,本文通过对拉丁方设计中的配对设计进行实质的分析,提出了运用EXCEL进行拉丁方设计的方法。结果认为,灵活利用Excel的随机函数如RAND、RANDOMBETWEEN等和排序按钮可以快速地进行拉丁方设计。     

时思寺古建筑群个案探究——景宁县大漈乡古建筑调研

建筑是对人类历史与文明的反映,一个国家的建筑史就是一个国家文明的发展史。与西方国家相比我国存世的古建筑资源相对贫乏。景宁县周边村落的这些古老的建筑是我国存世不多的古建筑其中的一部分,如何去研究开发它们,保护好它们,让它们能继续地存活下来,需要我们去努力。