Results 11 to 20 of about 222,342 (217)

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

Impact of Imperfect Parameter Estimation on the Performance of Multi-User ARGOS Receivers [PDF]

open access: yes, 2010
In this paper, we analyze the performance of Successive Interference Cancelation (SIC) receivers in the context of the ARGOS satellite system. Multi-user SIC receivers are studied in presence of imperfect estimates of signal parameters.
Boucheret, Marie-Laure   +4 more
core   +1 more source

Cultural imagery and statistical models of the force of mortality: Addison, Gompertz and Pearson [PDF]

open access: yes, 2010
We describe selected artistic and statistical depictions of the force of mortality (hazard or mortality rate), which is a concept that has long preoccupied actuaries, demographers and statisticians.
Hanley, JA, Turner, EL
core   +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

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

The phase shift of an ultrasonic pulse at an oil layer and determination of film thickness [PDF]

open access: yes, 2005
An ultrasonic pulse incident on a lubricating oil film in a machine element will be partially reflected and partially transmitted. The proportion of the wave amplitude reflected, termed the reflection coefficient, depends on the film thickness and the ...
Astridge D. G.   +4 more
core   +1 more source

Quantum communication using a bounded-size quantum reference frame

open access: yes, 2009
Typical quantum communication schemes are such that to achieve perfect decoding the receiver must share a reference frame with the sender. Indeed, if the receiver only possesses a bounded-size quantum token of the sender's reference frame, then the ...
Barnum H   +10 more
core   +2 more sources

CFD modelling of two-phase stirred bioreaction systems by segregated solution of the Euler–Euler model [PDF]

open access: yes, 2013
An advanced study of a bioreactor system involving a Navier–Stokes based model has been accomplished. The model allows a more realistic impeller induced flow image to be combined with the Monod bioreaction kinetics reported previously. The time-course of
Elqotbi, Mohammed   +3 more
core   +4 more sources

Direct probing of the Wigner function by time-multiplexed detection of photon statistics

open access: yes, 2009
We investigate the capabilities of loss-tolerant quantum state characterization using a photon-number resolving, time-multiplexed detector (TMD).
Banaszek K   +6 more
core   +1 more source

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