Results 121 to 130 of about 1,361,221 (313)

Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications

Advanced Functional Materials, EarlyView.
In MOCVD MoS2 memristors, a current compliance‐regulated Ag filament mechanism is revealed. The filament ruptures spontaneously during volatile switching, while subsequent growth proceeds vertically through the MoS2 layers and then laterally along the van der Waals gaps during nonvolatile switching.
Yuan Fa, Milan Buttberg, Ke Ran, Rana Walied Ahmad, Dennis Braun, Lukas Völkel, Jimin Lee, Sofía Cruces, Bart Macco, Bárbara Canto, Holger Lerch, Thorsten Wahlbrink, Holger Kalisch, Michael Heuken, Andrei Vescan, Joachim Mayer, Zhenxing Wang, Ilia Valov, Stephan Menzel, Max C. Lemme   +19 more
wiley   +1 more source

A frequency-dependent virtual impedance approach to improving stability with grid-forming inverters

Grid-forming inverters have gained significant attention for their ability to improve stability in weak and islanded power systems; however, the full extent of their potential benefits for the future bulk power system remains uncertain.
Unruh, Lukas
core  

An Improved Dual Grid-Forming MMC with Port-Hamiltonian Structure [PDF]

The operation of converters interconnecting ac and dc grids in future inertia-free and weak networks poses significant challenges. Modular multilevel converters applying dual grid-forming controls are able to effectively synchronize to weak grids and ...
Rabanal Alcubilla, Arkaitz, Tedeschi, Elisabetta, D'Arco, Salvatore   +2 more
core  

Speckle‐Engineered Upconversion Amplification in Nanoemulsion‐Templated Hydrogel Microdomes

Advanced Functional Materials, EarlyView.
Nanoemulsion‐confined PEGDA microdomes generate speckle‐like excitation fields that strongly amplify upconversion luminescence upon dehydration, enabling filter‐free visible readout with reversible on–off switching. DMD‐based lithography yields scalable, shape‐programmable arrays for moisture‐responsive displays and optical encryption.
Chaeyeong Ryu, Byungcheon Yoo, Seunghun Lee, Hyungyo Jeong, Sanggyun Jeong, Heesu Cho, Jongwon Oh, Dahye Baek, Jongkyu Kim, Yubin Lee, Eunsu Gu, Dong‐Hwan Kim, Jung‐Hoon Park, Jiseok Lee   +13 more
wiley   +1 more source

Virtual admittance synthesis in grid-forming converters

embargoed_20281127Le fonti di energia rinnovabile sono solitamente connesse alla rete elettrica tramite convertitori elettronici. La loro crescente diffusione, spinta dalla necessità di contrastare il cambiamento climatico attraverso la ...
FRATAMICO, CLAUDIA
core  

Grid-Forming Converter Fault Control Strategy and Its Impact on Relay Protection: Challenges and Adaptability Analysis

Energies
As the proportion of new energy generation continues to rise, power systems are confronted with novel challenges. Grid-forming converters, which possess voltage source characteristics and can support the grid, typically employ a VSG control strategy ...
Xiaopeng Li, Jiaqi Yao, Wei Chen, Wenyue Zhou, Zhaowei Zhou, Hao Wang, Zhenchao Jiang, Wei Dai, Zhongqing Wang   +8 more
doaj   +1 more source

Spatially Modulated Morphotropic Phase Boundaries in a Compressively Strained Multiferroic Thin Film

Advanced Functional Materials, EarlyView.
ABSTRACT The coexisting rhombohedral‐like (R′, MA) and tetragonal‐like (T′, MC) monoclinic phases in compressively strained bismuth ferrite thin films exhibit exceptional piezoelectric and magnetic properties. While previous studies have largely focused on probing the morphotropic phase boundaries (MPBs) comprising ordered R′/T′ twins, their self ...
Ting‐Ran Liu, Xiangwei Guo, Sajid Husain, Maya Ramesh, Pushpendra Gupta, Darrell Schlom, Ramamoorthy Ramesh, Yu‐Tsun Shao   +7 more
wiley   +1 more source

Adjustable parameters-based control strategy for VSG-type grid forming converters considering grid strength

Frontiers in Energy Research
IntroductionGrid-forming control has received increasing attention for being an effective solution to cope with low-inertia and weak damping systems.
Xuekai Hu, Zifan Li, Zhipeng Shu, Yaqin Wang   +3 more
doaj   +1 more source

Engineering Intelligent Graphene Oxide‐Cellulose Membranes: Suppressing Thermal Runaway for a Safer Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, EarlyView.
A novel thermos‐responsive hydroxypropyl cellulose/graphene oxide (HPC/GO) composite membrane is fabricated for reversible temperature‐gated ion transport in aqueous zinc‐ion batteries. Enabled by LCST‐driven structural transition, unimpeded ion diffusion at room temperature delivers high capacity, while elevated temperature suppresses transport; full ...
Xueli Bi, Kou Yang, Shushen Zheng, Juncheng Wang, Meng Li, Zhenzhen Wu, Yulin Zhong, Daria V. Andreeva, Kostya S. Novoselov, Shanqing Zhang   +9 more
wiley   +1 more source

Small signal modeling and stability analysis of multi-VSCs for grid-forming converters under low impedance grid

电力工程技术
The grid-forming converter has voltage source characteristics，providing damping and frequency support to high-impedance weak grids，and demonstrates good stability. However，instability may occur under low impedance grids.
Yongkang CHEN, Yunhui HUANG, Zheng FANG, Dong WANG, Jinrui TANG, Keliang ZHOU   +5 more
doaj   +1 more source