Results 21 to 30 of about 11,901,817 (244)
Current limitations of cryogenic microwave oscillator frequency stability
, 2014 Technical paperCryogenic microwave oscillators built upon sapphire loaded cavity resonators exhibit excellent levels of frequency stability. Here we present an overview of the current understanding of the various processes and noise sources that limit ...
Parker, S. +7 more
core +1 more source
Amidst centralized and distributed frequency control in power systems
, 2016 We propose a novel frequency control approach in between centralized and distributed architectures, that is a generalized continuous-time feedback control version of the dual decomposition optimization method.
GRAMMATICO, SERGIO +7 more
core +1 more source
Friction and Wear Performances of Stainless Steel Archwires After Corrosion in Oral Care Products
LubricantsTo elucidate the corrosion mechanism of orthodontic archwire in fluoride-containing environments, the friction and wear behavior of archwires following corrosion in fluoride-containing oral care products was investigated.
Cong Zhang +3 more
doaj +1 more source
Modelling, Implementation, and Assessment of Virtual Synchronous Generator in Power Systems
Journal of Modern Power Systems and Clean Energy, 2020 As more and more power electronic based generation units are integrated into power systems, the stable operation of power systems has been challenged due to the lack of system inertia. In order to solve this issue, the virtual synchronous generator (VSG),
Meng Chen, Dao Zhou, Frede Blaabjerg
doaj +1 more source
NanomaterialsTo mitigate the adverse effects of immersion in fluoride-containing solutions on the surface corrosion of orthodontic stainless steel archwires, carbon films were fabricated on these archwires under various deposition times and substrate bias voltages ...
Pengfei Wang, Minghui Hao, Shiqi Cheng
doaj +1 more source
Grid Impact of Frequency Regulation Provided by V2Gs Aggregated at HV, MV, and LV Level
IEEE Access, 2023 Vehicle-to-Grid chargers (V2Gs) are currently considered a key component for supporting future power systems in primary and especially secondary frequency regulation.
Marta Bernal-Sancho +4 more
doaj +1 more source
Design of a Fixed IF Down-Conversion Double-Balanced Mixer for UHF Band Applications
SensorsThis paper presents a new SiGe HBT-based high dynamic range double-balanced down-conversion differential mixer. Operating within the 0.5 GHz to 1.8 GHz range, the suggested mixer is appropriate for a variety of applications, such as cellular base ...
Trusha Kared +4 more
doaj +1 more source
Fast frequency response for effective frequency control in power systems with low inertia
The Journal of Engineering, 2019 The increasing penetration of renewable generation has led to the decrease of power systems’ overall inertia, which introduces significant challenges to frequency stability.
Qiteng Hong +8 more
doaj +1 more source
Frequency Modulation Control of an FMCW LiDAR Using a Frequency-to-Voltage Converter
Sensors, 2023 An FMCW LiDAR (frequency-modulated continuous-wave light detection and ranging) is a sensor that can measure distance using optical interference frequency (fb).
Jubong Lee, Jinseo Hong, Kyihwan Park
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source