Abstract As for the typical representatives of wide bandgap semiconductors, eGaN FETs (Enhancement Mode High Electron Mobility Transistors) are most commonly used envelope tracking, wireless power supply, automatic pilot, defence industry, etc. This paper compares characteristics different semiconductor materials and analyzes performance advantages GaN-based materials. On basis device structure...

Machine learning algorithms involve many fields such as statistics and probability theory. It is mainly aimed at computer simulation or execution of human behaviors to acquire new knowledge skills. And the existing be integrated then continue improved. This study aims introduce a machine algorithm establish corresponding training effect evaluation model, use model research analyze special physi...

This paper deals with designing material parameters for physical models. It is shown that the characteristic relation between modal frequencies and damping factors of a sound object is the acoustic invariant of the material from which the body is made. Thus, such characteristic relation can be used for designing damping models for a conservative physical model to represent a particular material.

The accuracy and the efficacy of radiological diagnosis depend, to a large extent, on the conditions under which radiographs and images are viewed. This mainly involves the luminance of the display devices and the ambient room illumination. We report a perceptual study to investigate the relationship between detectability and monitor luminance as well as ambient illuminance. A statistical test ...

BACKGROUND In aggregate studies, ecological indices are used to study the influence of socioeconomic status on health. Their main limitation is ecological bias. This study assesses the misclassification of individual socioeconomic status in seven ecological indices. METHODS Individual socioeconomic data for a random sample of 10,000 persons came from periodic health examinations conducted in ...

In response to views on public's right to know, there is growing attention to item disclosure - release of items, answer keys, and performance data to the public - in medical licensure examinations and their potential impact on the test's ability to measure competence and select qualified candidates. Recent debates on this issue have sparked legislative action internationally, including South K...

The dual process model assumes memory is based on recollection (retrieval with specific detail) or familiarity (retrieval without specific detail). A current debate is whether recollection is a threshold process or, like familiarity, is a continuous process. In the present study two continuous models and two threshold models of recollection were evaluated using receiver operating characteristic...