Abstract: Identifying the power difference and phase shift of a phased array antenna (PAA) is essential in the PAA calibration. In this article, the ability of calibrating a PAA in a reverberation ...
Nov. 26, 2024 — Researchers have developed a new method called MoPEDE, which has the potential to improve epilepsy treatment. The method combines brain measurements with genetic analyses ...
按照传统理论,活动星系核亮度增加时,宽线区半径应随之扩展,导致宽发射线的时间延迟增加即“呼吸效应”。而 NGC 4151 的观测结果却显示宽发射线的时间延迟随着亮度的增加而缩短。这一“反呼吸效应”可能与活动星系核紫外 - 光学光变之间的时间延迟相关。进一步,研究通过速度分辨时间延迟分析发现, NGC 4151 ...