Browsing by Author "Li, JM"

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A revised minimum spanning table method for optimal expansion of competence sets
(2000)
Chiang, CI
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Li, JM
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Tzeng, GH
;
Yu, PL
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運輸與物流管理系註：原交通所+運管所
Competence set analysis is a new approach to solve an import aspect of challenging MCDM problems. Thus, many researchers have developed efficient methods for solving the optimal expansion of competence sets (please see the references). The minimum spanning table method (MST) proposed by Feng and Yu (1997) is an efficient algorithm using spreadsheet tableaus to solve optimal expansion problems. In order to develop a computer program, in this paper, we propose the revised algorithm of MST, which can efficiently solve the optimal expansion problems. We develop a user-friendly program called MINST, which can solve fairly large-scale expanding problems even with PC of pentium 133.
Experimental behaviour and strength of concrete-encased composite beam-columns with T-shaped steel section under cyclic loading
(2005-07-01)
Chen, CC
;
Li, JM
;
Weng, CC
;
土木工程學系
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Department of Civil Engineering
Experimental research was conducted to investigate the structural behaviour of concrete-encased composite beam-columns with T-shaped steel section. Specimens were tested under lateral cyclic loading and axial compression. The test parameters included the distribution of longitudinal reinforcement, the spacing of transverse reinforcement, the presence of cross ties, and the axial compressive load level. The test results indicate that the cyclic behaviour and failure modes of the beam-columns are greatly affected by the direction of the bending moment owing to the unsymmetrical cross section. The concrete-encased composite beam-columns can develop stable hysteretic response and large energy absorption capacity by providing cross ties and decreased spacing of transverse ties. The current ACI and AISC-LRFD design provisions were also evaluated by comparing predicted strengths with the test results. (c) 2005 Elsevier Ltd. All rights reserved.
Optimal multiple stage expansion of competence set
(2000-02-01)
Li, JM
;
Chiang, CI
;
Yu, PL
;
運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
In this paper, we consider the expansion processes of competence sets which have asymmetric cost functions, intermediate skills, and compound skills; among the skills, cyclic connections are possible. We introduce the concept of the stage expansion process (SEP) of the competence set, and provide mathematical programming methods to find a minimal cost SEP and the ordering of expansion. (C) 2000 Elsevier Science B.V. All rights reserved.