Browsing by Author "CHEN, JR"

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GLOBAL SHAPE INFORMATION MODELING AND CLASSIFICATION OF 2D WORKPIECES
(1994-09-01)
WU, MC
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CHEN, JR
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JEN, SR
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交大名義發表
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工業工程與管理學系
This paper presents a representation scheme for modelling the global shape information of 2D workpieces and uses this representation scheme to classify workpieces. The global shape information of a workpiece could be seen as its topological structure. Retrieving workpieces with similar global shape would facilitate some design and manufacturing activities. To derive the proposed representation scheme, a 2D workpiece first has to be approximately enclosed by a rectilinear polygon. Then, the simplified skeleton of the rectilinear polygon, a tree structure consisting of a set of line segments, is derived. The line segments on the simplified skeleton involve two types: real links and virtual links. In this paper, we prove that each real link models a rectangular region, and the union of the modelling regions of all real links is equal to the region enclosed by the rectilinear polygon. Briefly, the simplified skeleton of a rectilinear polygon denotes a global decomposition of the polygon, and is topologically similar to the polygon. On the basis of simplified skeletons, a neural network approach is developed for classifying 2D workpieces.
PREPARATION OF BI0.7PB0.3SR1.0CA1.0CU1.8OY HIGH-TC SUPERCONDUCTOR BY THE CITRATE METHOD
(1990-04-01)
HEH, TS
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CHEN, JR
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TSENG, TY
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電控工程研究所
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Institute of Electrical and Control Engineering