Results 51 to 60 of about 187,993 (287)

FFT, FMM, or Multigrid? A comparative Study of State-Of-the-Art Poisson Solvers for Uniform and Nonuniform Grids in the Unit Cube

, 2016
In this work, we benchmark and discuss the performance of the scalable methods for the Poisson problem which are used widely in practice: the fast Fourier transform (FFT), the fast multipole method (FMM), the geometric multigrid (GMG), and algebraic ...
Biros, George, Gholami, Amir, Malhotra, Dhairya, Sundar, Hari   +3 more
core   +1 more source

Functional Connectivity Linked to Cognitive Recovery After Minor Stroke

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Patients with minor stroke exhibit slowed processing speed and generalized alterations in functional connectivity involving frontoparietal cortex (FPC). The pattern of connectivity evolves over time. In this study, we examine the relationship of functional connectivity patterns to cognitive performance, to determine ...
Vrishab Commuri, Isabella Dallasta, Ciaran Stone, Sophia Girgenti, Neda Gould, Rafael H. Llinas, Jonathan Z. Simon, Elisabeth Breese Marsh   +7 more
wiley   +1 more source

Enhanced voltage source converter control strategy for improved grid resilience: A 2DOF-PI approach

International Journal of Electrical Power & Energy Systems
This paper presents a control strategy for voltage source converters connected to weak grids. The proposed approach is based on slight modifications to the conventional vector current control strategy, including the use of two degrees of freedom ...
Carlos Díaz-Sanahuja, Ignacio Peñarrocha-Alós, Ricardo Vidal-Albalate, Agustí Egea-Àlvarez   +3 more
doaj   +1 more source

Power Production Losses Study by Frequency Regulation in Weak-Grid-Connected Utility-Scale Photovoltaic Plants

Energies, 2016
Nowadays, an increasing penetration of utility-scale photovoltaic plants (USPVPs) leads to a change in dynamic and operational characteristics of the power distribution system.
Jesús Muñoz-Cruzado-Alba, Christian A. Rojas, Samir Kouro, Eduardo Galván Díez   +3 more
doaj   +1 more source

Analysis and Simulation Research of Cascading Faults in AC/DC Hybrid Grid

IEEE Open Access Journal of Power and Energy, 2022
In the development of power systems, the traditional AC power grids are gradually evolving into AC/DC hybrid grids. However, the safety of hybrid grids is threatened by cascading faults, which is a set of chain events caused by a single fault and will ...
Xinzhou Dong, Yunshu Huang, Haozong Wang, Binshu Chen, Hao Wang, Qihuan Dong   +5 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Accurate Distinction of Weak and Strong AC Grids for Emerging Hierarchical-Infeed LCC-UHVDC Systems

CSEE Journal of Power and Energy Systems
Distinction of weak and strong AC grids for emerging hierarchical-infeed LCC-UHVDC systems is important for planning and operation departments. However, accuracy of earlier distinction methods is limited as they were developed by empirical reasoning ...
Hao Xiao, Xianzhong Duan, Yi Zhang
doaj   +1 more source

Review of HVDC technologies for weak grid interconnectors

Electrical Engineering
HVDC has experienced substantial growth in utilization globally, attributable to its superior capacity for transmitting large amounts of power relative to its HVAC counterpart and its increasingly competitive pricing. Voltage source converter technology, a variant of HVDC, is particularly well suited for transferring bulk offshore power, whether in ...
Roni Irnawan, Rian Fatah Mochamad, Filipe Faria da SIlva, Qi Zhang, null Sarjiya, Claus Leth Bak, Evy Haryadi   +6 more
openaire   +2 more sources

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

Advanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai, Xinrui Sarah Niu, Zhao Qin   +2 more
wiley   +1 more source

Impact of Synchronous Condensers on Small-Signal Stability of Offshore Wind Power Plants

IEEE Access
Grid-forming (GFM) converter control technology and synchronous condensers (SCs) have both been reported to improve the overall stability of a power system.
Sulav Ghimire, Kanakesh Vatta Kkuni, Emerson D. Guest, Kim H. Jensen, Guangya Yang   +4 more
doaj   +1 more source