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于戈, 夏登文, , 石绥祥, 鲍玉斌, 王大玲
海洋通报,2005,24(3):60~65,-0001,():
-1年11月30日
针对“数字海洋”应用目标,分析海洋数据管理与应用需求,研究数据仓库与数据挖掘技术在海洋信息领域的应用现状,提出海洋数据仓库与数据挖掘关键技术问题,以及构建海洋数据仓库及数据挖掘系统技术方法。
海洋信息, 数据仓库, 数据挖掘, 技术开发
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110浏览
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【期刊论文】Efficiently Mapping Integrity Constraints from Relational Database to XML Document1
于戈, Xiaochun Yang, Ge Yu, and Guoren Wang
ADBIS 2001, LNCS 2151, pp. 338-351, 2001.,-0001,():
-1年11月30日
XML is rapidly emerging as the dominant standard for exchanging data on the WWW. Most of application data are stored in relational databases due to its popularity and rich development experiences over it. Therefore, how to provide a proper mapping approach from relational data to XML documents becomes an important topic. Integrity constraints are useful for semantic specification that plays the important roles in relation schema definition. The existing XML schema language does not define general constraints and maintaining method for integrity constraints. So how to use XML to express and maintain integrity constraints especially the advanced integrity constraints, e.g., general constraints of relational data is one of challenge research issues. In this paper, a novel mapping approach is proposed to map relation data to XML document with active nodes, XMLA, and extended DTD with constraints, DTDC. The ability to maintain integrity constraints makes our approach more effective than other approaches.
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123浏览
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于戈, 王国仁, 王欣晖, 郑怀远
软件学报,1999,10(9):917~924,-0001,():
-1年11月30日
文章介绍了一个著名的在线事务处理系统性能测试标准TPC-C 及其在面向对象数据库管理系统Fish上的设计与实现,并基于实验结果对影响数据库系统性能的主要因素进行了验证和分析。
Benchmark, 面向对象数据库系统, TPC-C
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【期刊论文】An Efficient Iterative Optimization Algorithm for Image Thresholding
于戈, Liju Dong, and Ge Yu
CIS 2004, LNCS 3314, pp. 1079-1085, 2004.,-0001,():
-1年11月30日
Image thresholding is one of the main techniques for image segmentation. It has many applications in pattern recognition, computer vision, and image and video understanding. This paper formulates the thresholding as an optimization problem: finding the best thresholds that minimize a weighted sum-of-squared-error function. A fast iterative optimization algorithm is presented to reach this goal. Our algorithm is compared with a classic, most commonly-used thresholding approach. Both theoretic analysis and experiments show that the two approaches are equivalent. However, our formulation of the problem allows us to develop a much more efficient algorithm, which has more applications, especially in real-time video surveillance and tracking systems.
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75浏览
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【期刊论文】Web Users' Classification Using Fuzzy Neural Network
于戈, Fang Yuan, , Huanrui Wu, and Ge Yu
KES 2004, LNAI 3213, pp. 1030-1036, 2004.,-0001,():
-1年11月30日
With the increasing of data and Web users in the Internet, it is necessary and significant to identify users for offering further possible personalized services. To implement this goal, we used the users' surfing historical data stored in the Web log as features for classification. This paper aims to develop some techniques to achieve this objective using fuzzy neural networks (FNNs). Experimental results demonstrate the effectiveness of our proposed approach.
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60浏览
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