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32 results on '"Zhang, Haiwei"'

31. Similarity Computation for XML Documents by XML Element Sequence Patterns.

Author

Zhang, Haiwei, Yuan, Xiaojie, Yang, Na, and Liu, Zhongqi

Abstract

Measuring the similarity between XML documents is the fundamental task of finding clusters in XML documents collection. In this paper, XML document is modeled as XML Element Sequence Pattern (XESP) and XESP can be extracted using less time and space than extracing other models such as tree model and frequent paths model. Similarity between XML documents will be measured based on XESPs. In view of the deficiencies encountered by ignoring the hierarchical information in frequent paths pattern models and semantic information in tree models, semantics of the elements and the hierarchical structure of the document will be taken into account when computing the similarity between XML documents by XESPs. Experimental results show that perfect clustering will be obtained with proper threshold of similarity computed by XESPs. [ABSTRACT FROM AUTHOR]

Published
2008
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32. Study on Tool Wear Monitoring Based on Multi-source Information Fusion.

Author

Guo, Lanshen, Zhang, Haiwei, Qi, Yanxia, and Wei, Zhi

Abstract

The paper developed a system of tool wear monitoring in advanced manufacture systems. In conventional wear-monitoring method, it cannot exhibit unique behavior found in regular modern machining systems. Because a single monitoring signal, such as the signal of force, temperature, ultrasound or AE, cannot exactly describe the state of tool work for monitoring in advanced manufacture. This paper, therefore, mainly researched on real-time cutter state monitoring using neural network, neural network integration and multi-sensor information integrating technology. Picture pattern-recognition and feature extracting were adopted and combined with other information of the cutter dynamically. The characteristic information was gathered using an appropriate model of cutter wear or damage. Neural network were used to imitate the complicated nonlinear mapping relationship and to fuse multi-kind sensors that collect wearing and damage information and make decision and judgment rapidly. [ABSTRACT FROM AUTHOR]

Published
2008
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