Kun Shan University

About: Kun Shan University is a education organization based out in Tainan City, Taiwan. It is known for research contribution in the topics: Heat transfer & Thin film. The organization has 1992 authors who have published 2928 publications receiving 45685 citations. The organization is also known as: Kūnshān Kējì Dàxué.

A robust tracking control for chaotic Chua's circuits via fuzzy approach

Abstract: This paper addresses the problem of designing robust tracking controls for nonlinear chaotic Chua's circuits involving plant uncertainties and external disturbances. A hybrid adaptive-robust tracking control scheme which is based upon a combination of H/sup /spl infin// tracking theory, a variable structure system (VSS) control algorithm, and adaptive fuzzy control is developed such that all the states and signals of the closed-loop system are bounded and an H/sup /spl infin// tracking control from the tracking error to the external disturbance is guaranteed. In contrast to the previous investigations of controlling Chua's circuits, the controller developed here can be extended to handle a broader class of uncertain nonlinear chaotic Chua's circuits.

High power nitride based light emitting diodes with Ni/ITO p-type contacts

Abstract: Large size (i.e. 1 mm × 1 mm) high power nitride-based light emitting diodes (LEDs) with Ni/Au and Ni/indium tin oxide (ITO) p-contacts were fabricated. It was found that the 200 mA forward voltage was 3.19 and 3.3 V for the power LEDs with Ni/Au and Ni/ITO p-contacts, respectively. On the other hand, although the 200 mA output power was only 11.59 mW for the power LED with Ni/Au p-contact, the 200 mA output power could reach 16.52 mW for the power LED with Ni/ITO p-contact. Such a significant increase could be attributed to the more transparent nature of Ni/ITO, as compared to Ni/Au. Preliminary life test also indicates that power LEDs with Ni/ITO p-contact are at least as reliable as power LEDs with Ni/Au p-contact.