Results 61 to 70 of about 2,208,266 (201)

The measurement of frequency and frequency stability of precision oscillators [PDF]

The specification and performance of precision oscillators is discussed as a very important topic to the owners and users of these oscillators. This paper presents at the tutorial level some convenient methods of measuring the frequencies of precision ...
Allan, D. W.
core   +1 more source

Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor

, 2009
We report on the performance of the first table-top prototype atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields (lin||lin configuration).
Belcher, Ben-Aroya, Breschi, Cyr, Erhard, Eugeniy E. Mikhailov, Fleischhauer, Griffith, Irina Novikova, Jau, Jau, Kazakov, Knappe, Knappe, Knappe, Knappe, Kominis, Kornack, Ledbetter, Merimaa, Mikhailov, Nathan Belcher, Novikova, Novikova, Phillips, Shah, Shah, Taichenachev, Taichenachev, Taichenachev, Travis Horrom, Vanier, Vanier, Xiao, Xiao, Yashchuk, Zanon, Zibrov, Zibrov   +38 more
core   +1 more source

Electronic circuit delivers pulse of high interval stability [PDF]

, 1966
Circuit generates a pulse of high interval stability with a complexity level considerably below systems of comparable stability. This circuit is being used as a linear frequency discriminator in the signal conditioner of the Apollo command ...
Fisher, B.
core   +1 more source

Comparative analysis and optimal allocation of virtual inertia from grid‐forming and grid‐following controlled ESSs

IET Renewable Power Generation
A broad consensus of neutralizing the carbon dioxide emissions facilitates the transition to the renewable energy power system. Meanwhile, the concerns about the volatility of renewable energies are growing as the rotational inertia of power system ...
Naixuan Zhu, Pengfei Hu, Chongxi Jiang, Yanxue Yu, Daozhuo Jiang   +4 more
doaj   +1 more source

Unit Commitment With Analytical Under-Frequency Load-Shedding Constraints for Island Power Systems

IEEE Access
This paper presents a novel corrective frequency-constrained unit commitment (C-FCUC) for island power systems implementing analytical constraints on underfrequency load shedding (UFLS).
Mohammad Rajabdorri, Almudena Rouco, Lukas Sigrist, Enrique Lobato   +3 more
doaj   +1 more source

Frequency Stabilized Laser for Optical Frequency Standards.

The Review of Laser Engineering, 1993
Five frequency stabilized laser types were recommended as the optical frequency / wavelength standards for the practical realization of the meter which was redefined in 1983. Since 1983, work in national laboratories, Bureau International des Poids et Mesures and elsewhere has substantially improved the reproducibility of the radiations which are ...
openaire   +2 more sources

The CO2 laser frequency stability measurements [PDF]

Carbon dioxide laser frequency stability data are considered for a receiver design that relates to maximum Doppler frequency and its rate of change. Results show that an adequate margin exists in terms of data acquisition, Doppler tracking, and bit error
Johnson, E. H., Jr.
core   +1 more source

Deep reinforcement learning for adaptive frequency control of island microgrid considering control performance and economy

Frontiers in Energy Research
To achieve frequency stability and economic efficiency in isolated microgrids, grid operators face a trade-off between multiple performance indicators. This paper introduces a data-driven adaptive load frequency control (DD-ALFC) approach, where the load
Wanlin Du, Xiangmin Huang, Yuanzhe Zhu, Ling Wang, Wenyang Deng   +4 more
doaj   +1 more source

Expectational Stability of Resonant Frequency Sunspot Equilibria [PDF]

We consider the stability under adaptive learning of the complete set of solutions to the model when . In addition to the fundamentals solution, the literature describes both finite-state Markov sunspot solutions, satisfying a resonant frequency ...
George W. Evans, Seppo Honkapohja
core  

Frequency Response of Uncertain Systems: Strong Kharitonov-Like Results

, 2002
In this paper, we study the frequency response of uncertain systems using Kharitonov stability theory on first order complex polynomial set. For an interval transfer function, we show that the minimal real part of the frequency response at any fixed ...
Wang, Long
core   +2 more sources