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The six-junction inverted metamorphic multi-junction (IMM6J) solar cell has been identified as a viable path towards air mass zero (AM0) conversion efficiencies in excess of 37% (1-sun, AM0, 28°C, 1353 mW/cm2). The design of the IMM6J device architecture is presented in this paper. Initial experimental results of the IMM6J are presented, including an experimental best AM0 conversion efficiency of...
This paper records a successful application of linear parameter-varying (LPV) technique to energy management upon DC electric scooters (ES). Postulating Dynamic Duality, we identify the ES dynamics into a LPV plant that captures the nonlinearity, whereof the steady and transient responses perfectly match with the measured data. Incorporation of this LPV plant with per-distance performances upon energy...
A comparison between the operational map of a QD MLL done by autocorrelation and FROG is made. The results show that the complete mode-locking region is significantly smaller when FROG is used versus autocorrelation.
A patent-pending single design of an ultra-low-loss (ULL) magnetic ballast for a T5 high-efficient (T5-HE) fluorescent lamps rated from 14W to 35W is presented. Based on the use of a non-linear physical low-pressure discharge lamp model, it is discovered that the same set of ballast parameters can be chosen for operating T5-HE 14, 21, 28 and 35W lamps at their respective rated power at a mains voltage...
In this paper, we present a PC-based automatic measurement system for measuring the junction temperatures of light-emitting diodes (LEDs) operated at different forward currents. This system is described in three major parts: (1) screen panel and function design of control software (2) data acquisition and heating hardware (3) system integration and function test. In order to check and demonstrate...
Micromechanical resonant displacement gain stages have been demonstrated that employ directionally engineered stiffnesses in resonant structures to effect displacement amplification from a driven input axis to an output axis. Specifically, the introduction of slots along the output axis of a 53-MHz wine-glass mode disk resonator structure realizes a single gain stage with a measured input-to-output...
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