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Previous studies have shown the correlation between anxiety and cognitive emotion regulation strategies, but they have not distinguished between state anxiety and trait anxiety. Thus, we systematically investigated the relationships among strategies, state/trait anxiety and their influencing factors by meta‐analysis. A total of 53 original studies were included, with a total of 33,165 participants...
Digitally controlled dc-dc converters can exhibit undesired limit-cycle oscillations due to the lack of time resolution in the digital pulse-width modulator (DPWM) to satisfy specified output voltage regulation accuracy. In this paper, the relationship between DPWM time resolution and output voltage regulation accuracy is studied for several basic converters operating in both continuous conduction...
In this paper, two switchable power converters, integrated SEPIC/boost and flyback/boost, are described, analyzed and designed for power factor correction applications with multiple line input voltages (e.g. 120 Vrms and 277 Vrms). The range-selection switch can configure the converter to boost topology at low line input voltages, and to SEPIC or flyback topology at high line input voltage. As a result,...
This article aims to study the total backlink counts, external backlink counts and the Web Impact Factors (WIFs) for Chinese university websites. By studying whether the backlink counts and WIFs of websites associate with the comprehensive ratings and the research ratings for Chinese universities, the article demonstrates that the external backlink count can be a better evaluation measure for university...
This paper describes a completely digitally controlled low-harmonic rectifier. It is shown that the dynamics of the outer voltage loop can be significantly improved using a digital notch filter. Low input current harmonics and fast voltage response are experimentally verified using a 200 W universal-input boost power supply operating at the switching frequency of 200 kHz.
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