Abstract Coronal mass ejections (CMEs) are a prominent contributor to solar system space weather and might have impacted the Sun’s early angular momentum evolution. A signal diagnostic of CMEs on Sun is coronal dimming: drop in emission, tied CME, that direct result removing emitting plasma from corona. We present results dimming analysis Fe xii 1349 Å xxi 1354 emission ? Eridani ( Eri), young ...

The replacement of the disappearing incandescent lamps will be realized at a significant scale by compact fluorescent lamps (CFLs). Light regulation is a popular feature that is easily provided by incandescent lamps using a simple electronic equipment, the dimmer. Dimming can be achieved by (dimmable) CFL lamps as well, however this is done in a completely different way than in case of the form...

This paper presents a high-frequency electronic ballast for HID lamps. A new fixed frequency dimming method with low EMI features is developed in this research. The proposed electronic ballast has the advantages of high power density, simple circuit and low EMI features. The circuit operating principle and design procedures are described in detail. A laboratory prototype was built and tested. T...

A brightness shift is demonstrated for moving ramp stimuli. The data suggest that the transient visual response to changing luminance is combined with the sustained response to produce an overall impression of brightness. We attribute the brightness shift to the saturation of the transient response: a limitation on the maximum transient when responding to rapid brightening or dimming. The brigh...

As a kind of renewable energy, the development and utilization solar energy are valued by many countries. To accurately provide basis for use in mainland China, optimized empirical model is adopted to analyze variation trends spatial patterns radiation (SR) during 1961–2016 based on data 31 SR sites 500 sunshine duration (SD) stations. The results indicate that there obvious discrepancies annua...