Volume 20 Issue 5 - November 4, 2011 PDF
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Research Express@NCKU Nov. 4 ~ Nov. 10, 2011

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Novel maximum-power-point-tracking controller for photovoltaic energy conversion system
Tsorng-Juu Liang

Abstract-- As opposed to conventional two-stage designs, a single stage photovoltaic (PV) energy conversion system is implemented, resulting in size and weight reduction and increased efficiency. In contrast with our previous voltage controlled design, a single stage current mode controller is presented. The nonlinear output power relation of dP/dV versus V and the near linear relation of …

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A Study of Two-Dimensional Warranty Policies with Preventive Maintenance
Yeu-Shiang Huang

Product deterioration is a major issue of concern in the context of reliability analysis. In dealing with the problem of product deterioration for reliability analysis, it may not be satisfactory to solely consider the effects of time or age. In fact, usage would be another essential factor that accounts for the deterioration. A two-dimensional warranty with considerations for both time and …

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Geographocal advantage from accessibility based on spatial interaction model
Kuang-Yih Yeh

Innovation and significance of our results in this paper are that we clarify the relationship between the estimated OD trip and the geographical advantage; meanwhile, we develop the calculation algorithm of geographical advantages from OD information. It can be thought that our model has advantage because it can consider not only the network structure but also the accessibility when …

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A New Fabrication Process of Ultrathick Microfluidic Microstructures Utilizing SU-8 Photoresist
Gwo-Bin Lee

This paper describes a new fabrication process of ultrathick microfluidic devices utilizing SU-8 50 negative photoresist by standard UV lithography. Instead of using a conventional spin coater, a simple “constant-volume-injection” method is used to create a thick SU-8 photoresist film up to 1.5 mm with single coating. With appropriate thermal treatment, a highly-uniform ultrathick SU-8 film can …

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