Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Chan Roh"'
Autor:
Hyeongyo Chae, Chan Roh
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 7, p 1080 (2024)
Wave energy converters (WECs) have significant potential to meet the increasing energy demands and using an oscillating water column (OWC) is one of the most reliable ways to implement them. The OWC has a simple structure and excellent durability. Ho
Externí odkaz:
https://doaj.org/article/30ef959eefc64a5b8da0a0d18ea946be
Publikováno v:
Machines, Vol 12, Iss 2, p 109 (2024)
Global interest in environmentally friendly ships has surged as a result of greenhouse gas reduction policies and the demand for carbon neutrality. Despite growing demand for electric propulsion systems, there is a lack of research and development on
Externí odkaz:
https://doaj.org/article/23932b16f97149808d3dff14db93c908
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p 043057 (2023)
Coarse graining is a common imperfection of realistic quantum measurement, obstructing the direct observation of quantum features. Under highly coarse-grained measurement, we experimentally certify the continuous-variable nonclassicality of both Gaus
Externí odkaz:
https://doaj.org/article/078fa1b21f5a48caba4268dee968b064
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
Abstract We present squeezed light that is robust against spatial mode mismatch (beam displacement, tilt, and beam-size difference), which is generated from a self-imaging optical parametric oscillator below the threshold. We investigate the quantum
Externí odkaz:
https://doaj.org/article/dfc732a50c604d369064b8519ae08c12
Autor:
Chan Roh
Publikováno v:
Journal of Marine Science and Engineering, Vol 10, Iss 5, p 603 (2022)
In this study, a hydraulic system generator power converter was modeled to verify the performance of a hydraulic-based power take-off (PTO) system. Moreover, the characteristics and output performance of the PTO system were analyzed with various load
Externí odkaz:
https://doaj.org/article/319c978d629548268fc746d1097831ab
Autor:
Chan Roh
Publikováno v:
Energies, Vol 15, Iss 9, p 3136 (2022)
The pitch controller of a floating offshore wind power system has an important influence on the power generation and movement of the floating body. It drives the turbine blade pitch using a hydraulic actuator, whose inherent characteristics cause a d
Externí odkaz:
https://doaj.org/article/23eeff7289cd4e5da59b030762f4f1bc
Autor:
Chan Roh
Publikováno v:
Energies, Vol 15, Iss 8, p 2839 (2022)
A study on the capacity increase of a power converter according to the increase in the single capacity of wave energy converters and four-leg topology that can supply stable power even under unbalanced load conditions during independent operation is
Externí odkaz:
https://doaj.org/article/55498c8f791f4e6bbc201f0529d278c1
Autor:
Chan Roh, Kyong-Hwan Kim
Publikováno v:
Energies, Vol 15, Iss 2, p 572 (2022)
This study uses deep learning algorithms to predict the rotational speed of the turbine generator in an oscillating water column-type wave energy converter (OWC-WEC). The effective control and operation of OWC-WECs remain a challenge due to the varia
Externí odkaz:
https://doaj.org/article/d390144b37dd4ff88cb22ad87dd0b55a
Publikováno v:
Energies, Vol 15, Iss 3, p 716 (2022)
The installation of fixed offshore wind power systems at greater water depths requires a floating body at the foundation of the system. However, this presents various issues. This study analyzes the characteristics of the platform motion of a floatin
Externí odkaz:
https://doaj.org/article/2a45d8b7e4c2411686d18dadce15aab7
Autor:
Chan Roh
Publikováno v:
Journal of the Korean Society for Marine Environment & Energy. 25:190-198