Results 1 to 10 of about 848 (118)

Reconfiguration in Shipboard Power Systems [PDF]

2007 American Control Conference, 2007
A shipboard power system is self contained, tightly coupled, and small enough to allow nearly real time state estimation, given the right equivalent circuit representations. Redirecting power flow is the preeminent task of reconfiguration. This redirection should be accomplished in less than two cycles, while never compromising system stability or ...
Kent Davey, Raul Longoria, William Shutt, Johnson Carroll, Keerthi Nagaraj, Jerad Park, Tom Rosenwinkel, Wei Wu 0043, Ari Arapostathis   +8 more
openaire   +1 more source

Modelling of DC shipboard power system [PDF]

2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2016
Modelling and simulation of emerging DC shipboard power system (SPS) is required to validate the hardware design, converter control and protection algorithms. As DC SPSs may be large and complicated, the simulation of such systems using high fidelity models generally consumes much time and the validation of performance using multiple test scenarios ...
Satpathi, Kuntal, Ukil, Abhisek, Thukral, Navpreet, Zagrodnik, Michael Adam   +3 more
openaire   +2 more sources

Optimal Power Generation Scheduling of a Shipboard Power System [PDF]

2007 IEEE Electric Ship Technologies Symposium, 2007
This paper studies the optimal power generation scheduling for a shipboard power system. The problem is formulated as a discrete-time Markov decision process (MDP). The paper considers the shipboard power system both without any energy storage and with energy storage, and obtains an optimal power generation scheduling for each situation.
Wei Wu, Daifeng Wang, Ari Arapostathis, Kent Davey   +3 more
openaire   +1 more source

Directional protection scheme for MVDC shipboard power system [PDF]

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
DC shipboard power systems are gaining popularity primarily because they allow each prime mover to be operated at an optimal speed with respect to fuel efficiency. Another notable advantage is the simplified operation of generators in parallel without concern for frequency synchronization.
Kuntal Satpathi, Navpreet Thukral, Abhisek Ukil, Michael Adam Zagrodnik   +3 more
openaire   +2 more sources

Impact of the voltage dips in shipboard microgrid power systems [PDF]

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017
Voltage and frequency transient variations are the most common power quality issues in a ship microgrid system. In this paper, the impacts of the voltage dips induced by the sudden-load of ballast pump are analyzed in detail for the ship power systems.
Wenzhao Liu, Josep M. Guerrero, Mehdi Savaghebi, Juan C. Vasquez 0001, Tomasz Tarasiuk, Mariusz Gorniak   +5 more
openaire   +1 more source

Giant phytoplankton revealed by in situ imaging

Limnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Deployment of an autonomous Zooglider in the western Mediterranean Sea revealed the presence of long phytoplankton chains attaining maximum lengths of 6.4–10.4 mm suspended in situ. Elongate chains included the diatoms Guinardia, Proboscia, two other diatom morphologies, and solitary filaments of the cyanobacterium Trichodesmium. Most elongate
Mark D. Ohman, Karine Leblanc, Jeffrey S. Ellen, Sven Gastauer   +3 more
wiley   +1 more source

Constraining the Permeability and Outer‐Rise Hydration at the Central America Margin

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract Subduction zones are important drivers of Earth's geochemical evolution; the presence of water within the subduction system has substantial implications for geohazards, including the style of seismicity and the volume of magma generated at arc volcanoes.
D. Douglas, B. T. Aagaard, J. Naliboff, S. Naif   +3 more
wiley   +1 more source

Subsurface Production of Marine Derived Bacterial Tetraether Lipids: Implications for Paleoceanographic Reconstruction

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are widely used as paleoclimate proxies on land, yet their origin in marine environments remains incompletely constrained. Here, we analyze suspended particulate matter collected from five depths at an open‐ocean station in the northern South China Sea and provide depth‐resolved evidence
Jiaming Zhou, Jing Zhao, Yanwei Wang, Zian Tong, Huanye Wang, Binbin Guo, Longhui Deng, Fengping Wang, Qianyong Liang, Liang Dong   +9 more
wiley   +1 more source

Assessing Zooplankton Communities' Influence on Particulate Organic Carbon Concentration

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Zooplankton play a key role in setting the particulate organic carbon (POC) distribution in the ocean, but this role remains poorly quantified on large scales due to the complexity of zooplankton ecosystems and the sparsity and variability of observations.
Thelma Panaïotis, B. B. Cael
wiley   +1 more source

Ground‐Truthed Fiber‐Optic Sensing Reveals Internal Tide Bores Over Madeira's Steep Slope

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract We demonstrate the combined utility of distributed acoustic sensing (DAS) and repeat conductivity‐temperature‐depth (CTD) profiling for observing internal tide dynamics over a sloping seafloor. While DAS has been widely proposed as a method to infer ocean temperature variability from seafloor cables, quantitative in situ validation has been ...
Matthew H. Alford, Mohammad Belal, Alberto C. Naveira Garabato, Carl Spingys, Gunnar Voet, Oleg A. Godin, Ernst M. Uzhansky, Jennifer Ward Neale, Jesus Reis, Afonso Loureiro   +9 more
wiley   +1 more source