Browsing by Author "Huang, Chia-Ling"

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Coordination of production scheduling and delivery problems with heterogeneous fleet
(2014-07-01)
Low, Chinyao
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Chang, Chien-Min
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Li, Rong-Kwei
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Huang, Chia-Ling
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工業工程與管理學系
In a production scheduling with delivery problem, there are different types of products processed by a distribution center and then delivered to retailers. Each retailer order might be consisted of different products. The resolution of this problem is to determine the production sequence, retailers\' needs to heterogeneous fleet of vehicles and the visiting sequence of each vehicle for delivery goods within time windows. In this article, a nonlinear mathematical model is proposed with minimizing the total cost which includes transportation cost, vehicle arrangement cost and penalty costs, subjected to satisfy all demands of each retailer. Following, two adaptive genetic algorithms (AGAs) are designed and tested in variety of production and delivery scenarios. The computational experiments show that the total cost gradually decreases as the vehicle type employed in the delivery stage increasing. In addition, more kinds of vehicle types provided in the delivery stage could reduce fixed vehicle cost and variable routing cost. (C) 2014 Elsevier B.V. All rights reserved.
Reconfigurable 1.5-2.5-GHz Phase Shifter with 360 degrees Relative Phase-Shift Range and Reduced Insertion-Loss Variation
(2017-01-01)
Chi, Pei-Ling
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Huang, Chia-Ling
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交大名義發表
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National Chiao Tung University
This paper proposes a varactor-based reflection-type phase shifter that allows for 360 degrees relative phase-shift range and reduced insertion-loss variation over the entire frequency tuning range. In particular, a novel and compact reconfigurable 90 degrees coupler is devised and it is, theoretically, able to achieve perfect return loss and isolation at each tuning state. Thus, when this 3-dB coupler is terminated with two reflective loads, the phase shifter can operate at a wide range of center frequencies. Moreover, a tunable transformation network is proposed to optimally reduce the insertion-loss variation within the 360 degrees continuous phase-shift range for any operational frequency. Experimental results show that the fabricated phase shifter, in a frequency range of 1.5-2.5 GHz, can realize 360 degrees relative phase-shift range with greater than 16.5 dB in return loss and less than 3.8 dB in insertion-loss variation.
USING GAME AND STATISTICAL ANALYSIS TO CONFIRM GOLDRATT'S LOGICAL ANALYSIS OF POOR DELIVERY IN A MULTI-PROJECT ENVIRONMENT
(2011-11-01)
Huang, Chia-Ling
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Chang, Hao-Ging
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Li, Rong-Kwei
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Tsai, Chih-Hung
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工業工程與管理學系
The objective of this study is to confirm Goldratt's logical analysis of poor delivery in a multi-project environment. Two hundred and ten experienced managers were invited to participate in a multi-project management game that simulates reality. A statistical analysis of the experimental data of this study indicates that the mode of project planning and execution (unrealistic project planning, a lack of clear working priorities, misuse of safety time, and bad multi-tasking), not uncertainty, is the root cause of poor delivery, and should therefore be improved first. The result confirmed Goldratt's logical analysis of poor delivery in project management.