Results 11 to 20 of about 7,921,743 (235)

Complex Berry phase and imperfect non-Hermitian phase transitions [PDF]

open access: yes, 2023
In many classical and quantum systems described by an effective non-Hermitian Hamiltonian, spectral phase transitions, from an entirely real-energy spectrum to a complex spectrum, can be observed as a non-Hermitian parameter in the system is increased ...
Feng, Liang   +3 more
core   +1 more source

A perspective on the fundamental quality of GPS radio occultation data [PDF]

open access: yesAtmospheric Measurement Techniques, 2015
Radio occultation (RO) is a promising source of observation for weather and climate applications. However, the uncertainties arising from imperfect retrieval algorithms may weaken the overall confidence in the data and discourage their use.
T.-K. Wee, Y.-H. Kuo
doaj   +1 more source

Semantic and pragmatic values of the Italian imperfetto: Towards a common interpretive procedure

open access: yesCatalan Journal of Linguistics, 2015
This paper proposes an account of the semantics and pragmatics of the Italian indicative imperfect. This tense is described as deriving all of its uses from an extremely reduced core of semantic features as the point of departure to a series of ...
Laura Baranzini, Claudia Ricci
doaj   +1 more source

Receiver operating characteristic (ROC) curves when ignoring imperfect reference and considering imperfect reference.

open access: yes, 2021
(A) A plot of test sensitivity (y-coordinate) versus its false-positive rate (x-coordinate) obtained at each cut-off level of confidence score ignoring imperfect reference. The area under the ROC curve is 0.797.
Junji Kumasawa (10127194)   +12 more
core   +1 more source

Confusion matrices arising from the use of a gold standard reference, an imperfect reference with correlated errors (accuracy = 0.90) and an imperfect reference with independent errors (accuracy = 0.90).

open access: yes, 2023
Confusion matrices arising from the use of a gold standard reference, an imperfect reference with correlated errors (accuracy = 0.90) and an imperfect reference with independent errors (accuracy = 0.90).
Giles M. Foody (5707553)
core   +1 more source

A Novel Direction-of-Arrival Estimation via Phase Retrieval with Unknown Sensor Gain-and-Phase Errors

open access: yesSensors, 2019
In signal array processing, high-resolution direction-of-arrival (DOA) estimation algorithms work well on the assumption that the system models are perfect. However, in practicality, there are imperfect system models in which sensor gain-and-phase errors
Lingwen Zhang   +3 more
doaj   +1 more source

Turbo Trellis Coded Modulation (TTCM) with Imperfect Phase Reference

open access: yesElectrica, 2019
In this paper, we investigate the performance of Turbo Trellis Coded Modulation (TTCM) over AWGN, and Rician channels and assume that phase disturbance is available.
Osman N. Ucan, Onur Osman
doaj   +2 more sources

Performance of turbo coded signals over partial response fading channels with imperfect phase reference

open access: yes, 2021
In this paper, the performance of turbo coded signals are investigated over a new channel model, denoted as 1 +/- D-n / Partial Response Fading Channels (PRFC) with imperfect phase reference.
Gumus, A, Osman, O, Ucan, ON
core  

PERFORMANCE OF TURBO CODED SIGNALS OVER PARTIAL RESPONSE FADING CHANNELS WITH IMPERFECT PHASE REFERENCE

open access: yesElectrica, 2011
In this paper, the performance of turbo coded signals are investigated over a new channelmodel, denoted as 1± Dn / Partial Response Fading Channels (PRFC) with imperfect phasereference.
Osman N. Ucan, Onur Osman, Aykal Gumus
doaj   +2 more sources

Microwave Imaging Using CMOS Integrated Circuits with Rotating 4 × 4 Antenna Array on a Breast Phantom

open access: yesInternational Journal of Antennas and Propagation, 2017
A digital breast cancer detection system using 65 nm technology complementary metal oxide semiconductor (CMOS) integrated circuits with rotating 4 × 4 antenna array is presented.
Hang Song   +5 more
doaj   +1 more source

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