- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Handbook of Exoplanets || HR8799: Imaging a System of Exoplanets
摘要： The HR 8799 planetary system is the most intriguing and spectacular system yet discovered by direct imaging. With four gas giant planets (5–7 MJ up) orbiting at wide separations (15–70 AU) from an unusual, young A star, HR 8799 serves as a Rosetta Stone for atmospheric and planet formation physics. With direct access to the light from the planets themselves, extensive photometric and spectroscopic studies of the system have been undertaken, painting a fascinating picture of cloud formation, nonequilibrium chemistry, and potential elemental abundance measurements that can constrain formation pathways. The dynamical structure of the system is complex, with the four massive planets likely stabilized through participation in mean-motion resonances. Two belts of debris flank the planets, with a warm belt analogous to the solar system asteroid belt and a wide, cold ring comparable to the Kuiper belt. HR 8799 will continue to be studied extensively from the ground and space in the coming years, with the exciting possibility that additional planets remain to be discovered in the system.
关键词： spectroscopy,exoplanets,dynamics,system architecture,planetary system,HR 8799,photometry,direct imaging,debris disk,atmospheric properties
更新于2025-09-23 15:21:01
-
[IEEE 2018 IEEE 5G World Forum (5GWF) - Silicon Valley, CA, USA (2018.7.9-2018.7.11)] 2018 IEEE 5G World Forum (5GWF) - Local Area Data Network for 5G System Architecture
摘要： We introduce a noble concept and design of Local Area Data Network (LADN) that geographically isolates the operator network resources to provide high data rate, low latency, and service localization for 5G System Architecture. In addition, we compare two alternative solutions of handling the LADN session with considerations of UE power consumptions and human mobility patterns. The proposed LADN technology enables the edge computing.
关键词： Edge Computing,Local Area Data Network,5G System Architecture
更新于2025-09-23 15:21:01
-
[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Study of wavelength-resolved light-induced metastable defects in (Ag,Cu)(In,Ga)Se <sub/>2</sub> thin-films using capacitance based methods
摘要： We introduce a new type of electric transit bus (ETB) system that uses the innovative wireless power transfer technology developed by the Korea Advanced Institute of Technology (KAIST), which is called on-line electric vehicle (OLEV). In the ETB system, the wireless-charging infrastructure installed under the road charges the fleet of electric buses that are operative over that road. The technology is innovative in that the battery in the bus is charged while it is moving over the charging infrastructure. Unlike conventional electric vehicles, the OLEV-based ETB system is a road–vehicle integrated system. Since charging occurs while the vehicle is operational, the performance of the operation depends on the system integration of the vehicle and the road in which the charging infrastructure is embedded. In this paper, we qualitatively analyze the benefits of the OLEV-based ETB system from the energy logistics perspective. We then present two analytical economic design optimization models. The first model is for an ETB system operating in a “closed environment” with no traffic and no heavy vehicle interactions. The OLEV-based shuttle bus currently operating on the KAIST campus constitutes such a case. The second model is the “open environment model” and considers an ETB system operating in normal traffic conditions. We also present the result of numerical case studies for the optimization models. The goal of this paper is to present an innovative ETB system and a logical design framework for commercializing and deploying that system.
关键词： wireless power transfer,Electric vehicle,systems optimization,system architecture,on-line electric vehicle (OLEV)
更新于2025-09-23 15:19:57