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Physically-based Li-ion electrochemical cell models have been shown capable of predicting cell performance and degradation, but are computationally expensive for optimization-oriented design applications. Faster empirical models have been developed from experimental data, but are not generalizable to operating conditions outside of the range established by the calibration data. In this paper, a reduced-order...
Proton exchange membrane fuel cells (PEMFCs) underwent a huge development. The advantages of this type of fuel cell includes low operating temperature, quick start-up, planar configuration and easier sealing due to the use of a solid electrolyte. However performance remains one of the most important issues in commercialization of polymer exchange membrane fuel cell PEMFC. There are many factors which...
Of course, fuel cells are also subjects to signs of wear. Over time of usage this is shown by lower power efficiency, the degradation. Degradation correlates with wear due to mechanical stress, high stack temperature, and too fast load changes. Generally it is influenced by operating the fuel cell with wrong conditions regarding to temperature, anode and cathode pressure. Despite this time variant...
A new external algorithm with sensing circuit are proposed to compensate AMOLED display degradation. The compensation is enabled by first evaluating degradation level of OLEDs based on the OLED anode voltages detected by a newly-designed sensing subcircuit. According to sensed voltages, the external algorithm selects appropriate built-in models to compensate OLED degradation with the aim to achieve...
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