Results 51 to 60 of about 1,573 (148)

Tuning the Mutual Synchronization of Electrically Coupled Spin‐Torque Oscillators by Selecting the Vortex Dynamic Regime

Advanced Electronic Materials, Volume 11, Issue 9, June 2025.
The synchronization ability of vortex spin‐torque nano‐oscillators is examined across three dynamical regimes: the gyrotropic mode, the dynamic C‐state, and a transition regime. The transition regime exhibits the strongest synchronization ability, and it can be driven into a dynamic state with no ability to synchronize (dynamic C‐state) by slightly ...
Miguel Romera, Philippe Talatchian, Steffen Wittrock, Romain Lebrun, Karla J. Merazzo, Paolo Bortolotti, Laurent Vila, Ricardo Ferreira, Marie Claire Cyrille, Ursula Ebels, Vincent Cros, Julie Grollier   +11 more
wiley   +1 more source

Interaction mechanism of multi-time scale control loops between PLL-synchronized and power-synchronized converters

International Journal of Electrical Power & Energy Systems
The interaction of multi-time scale control loops between grid-following converters (GFLCs) based on phase-locked loop (PLL) synchronization and grid-forming converters (GFMCs) based on power synchronization introduces new instability risks. Based on the
Yi Zhou, Zhouchen Deng, Yiwei Qiu, Hao Ding, Xiaofeng Jiang, Pengyu Pan, Tianlei Zang, Buxiang Zhou   +7 more
doaj   +1 more source

Green’s Function Monte Carlo Calculations with Two- and Three-Nucleon Interactions from Chiral Effective Field Theory

EPJ Web of Conferences, 2016
I discuss our recent work on Green’s function Monte Carlo (GFMC) calculations of light nuclei using local nucleon-nucleon interactions derived from chiral effective field theory (EFT) up to next-to-next-to-leading order (N2LO).
Lynn J. E.
doaj   +1 more source

A Constrained Path Monte Carlo Method for Fermion Ground States

, 1996
We describe and discuss a recently proposed quantum Monte Carlo algorithm to compute the ground-state properties of various systems of interacting fermions. In this method, the ground state is projected from an initial wave function by a branching random
%E. Y. Loh, Jr., A. Parola, A. Parola, D. F. B. ten Haaf, D. M. Ceperley, D. M. Ceperley, D. M. Ceperley, D. M. Ceperley, E. Y. Loh, Jr., G. Fano, G. Sugiyama, H. De Raedt, H. De Raedt, H. J. M. van Bemmel, J. B. Anderson, J. B. Anderson, J. B. Anderson, J. Carlson, J. Carlson, J. E. Gubernatis, J. E. Hirsch, J. H. Hetherington, J. W. Moskowitz, J. W. Negele, K. E. Schmidt, M. H. Kalos, M. H. Kalos, N. Furukawa, P. J. Reynolds, R. Blankenbecler, R. M. Panoff, S. B. Fahy, S. B. Fahy, S. R. White, S. R. White, S. R. White, Shiwei Zhang, Shiwei Zhang, Shiwei Zhang, Zhiping Liu   +39 more
core   +1 more source

Increasing Fire Weather Season Overlap Between North America and Australia Challenges Firefighting Cooperation

Earth's Future, Volume 13, Issue 4, April 2025.
Abstract The USA, Canada and Australia are members of an international partnership that shares firefighting resources, including equipment and personnel. This partnership is effective because fire risk between Australia and North America is historically asynchronous. However, climate change is causing longer fire seasons in both regions, increasing the
Doug Richardson, Andreia F. S. Ribeiro, Fulden Batibeniz, Yann Quilcaille, Andrea S. Taschetto, Andrew J. Pitman, Jakob Zscheischler   +6 more
wiley   +1 more source

Extended quantum U(1)-liquid phase in a three-dimensional quantum dimer model

, 2011
Recently, quantum dimer models, in which the system can tunnel between different classical dimer configurations, have attracted a great deal of interest as a paradigm for the study of exotic quantum phases.
Fulde, Peter, Penc, Karlo, Pollmann, Frank, Shannon, Nic, Sikora, Olga   +4 more
core   +1 more source

Per‐Unit Modeling Standards for Simplified Calculation in Grid‐Forming Converter Systems

Electronics Letters, Volume 61, Issue 1, January/December 2025.
The topology and control scheme of GFMC systems. ABSTRACT This letter proposes a per‐unit modeling standard (PUMS) for simplified calculations in grid‐forming converter (GFMC) systems, which can improve and simplify the modeling process. The proposed PUMS can solve the bottlenecks and difficulties of calculation caused by the upper limits of ...
Mufan Wang, Fan Li, Shuyi Shen, Xiahui Zhang, Zhiheng Shen, Xinhua Xiong, Chang Li   +6 more
wiley   +1 more source

The current landscape fire management in Ukraine and strategy for its improvement

Environmental & Socio-economic Studies, 2021
Recurrent wildfires in Ukraine exert severe impacts on the environment, human health and security as well as damage to private and public assets. From 2007 to 2020, the frequency of large wildfires has increased and reached a level that has not occurred ...
Soshenskyi Oleksandr, Zibtsev Sergiy, Gumeniuk Vasyl, Goldammer Johann Georg, Vasylyshyn Roman, Blyshchyk Volodymyr   +5 more
doaj   +1 more source

Spin polarized liquid 3He

, 2008
We have employed the constrained variational method to study the influence of spin polarization on the ground state properties of liquid $^3{\rm He}$. The spin polarized phase, we have found, has stronger correlation with respect to the unpolarized phase.
Archie C. N., Bordbar G. H., Bordbar G. H., Bordbar G. H., Engel L. W., G. H. BORDBAR, Hess D. W., Krotscheck E., Levesque D., Lhuillier C., M. BIGDELI, M. R. VAHDANI, Manousakis E., Ng T. K., S. M. ZEBARJAD, Viviani M.   +15 more
core   +1 more source

Parameter Optimization of Grid‐Forming Converters by Maximizing Domain of Attraction Estimates of Converter‐Integrated Power Systems

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
Grid‐forming converters (GFMCs) are expected to replace synchronous generators (SGs) in future power systems with high penetration of power electronics. This paper proposes a controller parameter optimization method for GFMCs by maximizing the domain of attraction estimates using sum‐of‐squares programming, significantly improving transient stability ...
Yang Liu, Qianghui Hao, Zhenjia Lin, Yuanzheng Li, Qiuwei Wu, Yiming Ma   +5 more
wiley   +1 more source