Results 31 to 40 of about 125,078 (291)
, 2010 A low maintenance long-term operational cryogenic sapphire oscillator has been implemented at 11.2 GHz using an ultra-low-vibration cryostat and pulse-tube cryocooler.
Hartnett, John G., Nand, Nitin R.
core +1 more source
Synchronization Performance Assessment of GNSS-Based Time Source in 5G Communication Architecture
IEEE AccessPrecise timing using Global Navigation Satellite System (GNSS) has been widely applied in various civil technologies, such as bank transactions, internet communication, and power grid management.
Tzu-Pang Tseng +2 more
doaj +1 more source
Improving the GRACE Kinematic Precise Orbit Determination Through Modified Clock Estimating
Sensors, 2019 Utilizing global positioning system (GPS) to determine the precise kinematic orbits for the twin satellites of the Gravity Recovery and Climate Experiment (GRACE) plays a very important role in the earth’s gravitational and other scientific fields.
Xingyu Zhou +4 more
doaj +1 more source
Cancellation of light-shifts in an N-resonance clock
, 2005 We demonstrate that first-order light-shifts can be cancelled for an all-optical, three-photon-absorption resonance ("N-resonance") on the D1 transition of Rb87. This light-shift cancellation enables improved frequency stability for an N-resonance clock.
Aleksei V. Taichenachev +11 more
core +1 more source
Allan Deviation Plot as a Tool for Quartz-Enhanced Photoacoustic Sensors Noise Analysis
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2016 We report here on the use of the Allan deviation plot to analyze the long-term stability of a quartz-enhanced photoacoustic (QEPAS) gas sensor. The Allan plot provides information about the optimum averaging time for the QEPAS signal and allows the prediction of its ultimate detection limit.
Giglio, Marilena +5 more
openaire +3 more sources
Extragalactic radio source stability and VLBI celestial reference frame: insights from the Allan standard deviation [PDF]
Astronomy & Astrophysics, 2018 Aims. We investigate the composition of the noise in coordinate time series of several hundreds of extragalactic radio sources monitored by the geodetic VLBI program since 1979. The noise type is identified at all available timescales longer than one year, following the observational history of the source. Methods.
Gattano, C., Lambert, S., Le Bail, K.
openaire +3 more sources
IEEE Photonics Journal, 2018 An electrical-domain self-adaptive mid-infrared absorption spectroscopy for methane detection based on an interband cascade laser was demonstrated. By adding noise into the laser drive signal, denoising and sensing performances were evaluated for the ...
Fang Song +6 more
doaj +1 more source
Decoherence benchmarking of superconducting qubits [PDF]
, 2019 We benchmark the decoherence of superconducting qubits to examine the temporal stability of energy-relaxation and dephasing. By collecting statistics during measurements spanning multiple days, we find the mean parameters $\overline{T_{1}}$ = 49 $\mu$s ...
Bengtsson, Andreas +6 more
core +2 more sources
Locating Two-Level Systems in a Superconducting Xmon Qubit
Applied Sciences, 2023 One significant source of decoherence in superconducting circuits is known as two-level systems (TLSs), found in amorphous oxide layers. These circuits can, however, also be utilized as spectral and temporal TLS probes.
Xin-Xin Yang +7 more
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To compare the effectiveness and safety of tenecteplase (TNK) versus alteplase (TPA) in patients with basilar artery occlusion prior to endovascular treatment (EVT). Methods In this retrospective multicenter study (BAO‐TNK), we analyzed consecutive BAO patients from 14 U.S.
Rahul R. Karamchandani +38 more
wiley +1 more source