异构数据库迁移的设计和实现*

介绍了基于B/S模式异构数据库迁移的具体实现, 阐述了分布式数据库概念、JDBC原理和数据库转换技巧;详细说明了数据转换规则、数据库连接、迁移过程、断点续传。     

基于视觉的表格自动识别方法

表格是建筑工程图中表示信息的主要方式之一。计算机自动读图、读表技术对建筑业现代化有十分重要作用。借鉴人工读表的视觉原理和步骤, 针对表格形式的多变性等特点, 提出基于视觉、自顶向下的表格自动阅读方法, 有效地解决了表格格式分析, 识别并处理了耦合、嵌套、合并、复用等情况。     

Ramsey数R（3,28）新下界的并行计算*

寻找有效的参数集,构造素数阶循环图,用并行算法获得二色Ramsey数R（3,q）的新下界:R（3,28）≥164。     

基于IBL算法的CBR系统中索引与检索机制研究

文章介绍了基于示例学习算法IBL的概况,并对其加以改进,提出了一个新的算法IBL－Cluster。它主要由概念描述形成算法和概念描述修改算法构成。在此基础上建立了应用在基于事例的推理系统CBR中的基于IBL算法的索引与检索机制。实验表明新算法IBL－Cluster在存储空间及测试正确率方面均有改善。     

利用VRML构建虚拟商店

本文首先提出了将虚拟现实技术应用到电子商务中的思想,接着详细介绍了基于ＶＲＭＬ的虚拟的实现过程,最后对电子的发展趋势进行了展望。     

Design and performance evaluation of mixed manual and automatedcontrol traffic

We present a technology which allows manually controlled and automatically controlled vehicles to co-exist, thereby reducing much of the cost and infrastructure requirements in highway automation. An autonomous vehicle driving system (AVDS) is presented which only uses information from vehicle sensors, thereby eliminating the requirement that vehicles communicate with one another. This format allows gradual market penetration of AVDS, which makes the technology attractive from a systems implementation standpoint. To evaluate the performance of the mixed traffic, we simulate manual and automated vehicles together and show that our AVDS can lead to potentially large gains in capacity and smoother flow without the loss of safety     

Adaptive fuzzy control for strict-feedback canonical nonlinear systems with H/sub /spl infin// tracking performance

In this paper, an adaptive fuzzy controller for strict-feedback canonical nonlinear systems is proposed. The completely unknown nonlinearities and disturbances of the systems are considered. Since fuzzy logic systems can uniformly approximate nonlinear continuous functions to arbitrary accuracy, the adaptive fuzzy control theory is employed to derive the control law for the strict-feedback system with unknown nonlinear functions and disturbances. Moreover, H/sub /spl infin// tracking performance is applied to substantially attenuate the effect of the modeling errors and disturbances. Finally, examples are simulated to confirm the applicability of the proposed methods.     

6063铝合金型材氧化过程中出现"白斑"的原因分析及解决

分析了6063型铝型金在硫酸阳极氧化过程中出现“白斑”的原因并提出了解决措施。     

钛化物陶瓷的高温蠕变行为与失效机理

分析了原位生成含钛复相陶瓷TiB2-TiC(TT），TiB2-TiCxN1-x(TTT）及TiB2-TiC-SiC（TTS）的高温蠕变性能和高温氧化行为，考察在恒定载荷不同温度下，材料挠度随时间的变化，探讨了其高温失效机理，并给出了材料抗三点弯曲高温蠕变方程-挠度/时间方程，结果表明，含钛复相陶瓷TT，TTT及TTS在1100℃时均出现较大的蠕变，因此，上述3种材料不宜在1100℃及以上的温度下使用，指出失效的原因之一是TiB2陶瓷在800℃时的高温氧化及1100℃时的高温热分解。