Results 11 to 20 of about 111,602 (208)

Device-independent characterization of quantum instruments [PDF]

open access: yesQuantum, 2020
Among certification techniques, those based on the violation of Bell inequalities are appealing because they do not require assumptions on the underlying Hilbert space dimension and on the accuracy of calibration methods.
Sebastian Wagner   +3 more
doaj   +1 more source

Vehicle Impact on Tire Road Noise and Validation of an Algorithm to Virtually Change Tires

open access: yesApplied Sciences, 2022
Especially for electric vehicles, the tire impact on car noise is becoming more and more important. The requirement of meeting certification criteria makes estimating the sound pressure level essential for vehicle manufacturers.
Michael Leupolz, Frank Gauterin
doaj   +1 more source

Conceptual estimation of the noise reduction potential of electrified aircraft engines★

open access: yesActa Acustica, 2023
The advent of electrified propulsion systems for civil aircraft promises not only notable reductions of CO2 and NOx emissions, but also of perceived noise.
Geyer Thomas F., Enghardt Lars
doaj   +1 more source

Multiobjective optimisation of flight paths for noise level mitigation and sound quality improvement

open access: yesNoise Mapping, 2021
The present work deals with the multiobjective, multidisciplinary optimisation of takeoff and approach operations of a commercial aircraft aimed at the mitigation of the impact of aviation noise on the population.
Centracchio Francesco   +2 more
doaj   +1 more source

Disruptive Technologies Certification Standard Approach

open access: yesAerospace, 2023
The current rapid technological change identifies the evolution of people’s transportation as one of the primary effects. Hybrid-electric propulsion reveals potential advantages, including fuel savings, lower pollution, and reduced noise emissions. It is
Gianpiero Buzzo   +7 more
doaj   +1 more source

A Noise Emission and Vibration Study of a MISTA RD-165 FHAD Grader to Reduce Environmental Harmful Impact

open access: yesTechnologia i Automatyzacja Montażu, 2023
Construction machinery noise emission and vibration on the operator sitearethe most important harmful factors having impact on human health. Theyaffect for people working on the operators andas well as otherpersons around the machine.
Janusz Kobiałka, Andrzej Barszcz
doaj   +1 more source

Device-independent and semi-device-independent entanglement certification in broadcast Bell scenarios

open access: yesSciPost Physics Core, 2023
It has recently been shown that by broadcasting the subsystems of a bipartite quantum state, one can activate Bell nonlocality and significantly improve noise tolerance bounds for device-independent entanglement certification.
Emanuel-Cristian Boghiu, Flavien Hirsch, Pei-Sheng Lin, Marco Túlio Quintino, Joseph Bowles
doaj   +1 more source

Guidelines for the LTO Noise Assessment of Future Civil Supersonic Aircraft in Conceptual Design

open access: yesAerospace, 2022
One of the most critical regulatory issues related to supersonic flight arises from limitations imposed by community noise acceptability. The most efficient way to ensure that future supersonic aircraft will meet low-noise requirements is the ...
Grazia Piccirillo   +3 more
doaj   +1 more source

High-Dimensional Pixel Entanglement: Efficient Generation and Certification [PDF]

open access: yesQuantum, 2020
Photons offer the potential to carry large amounts of information in their spectral, spatial, and polarisation degrees of freedom. While state-of-the-art classical communication systems routinely aim to maximize this information-carrying capacity via ...
Natalia Herrera Valencia   +6 more
doaj   +1 more source

EXPERIENCE IN PREPARATION OF MAZ VEHICLES WITH DEUTZ ENGINES FOR NOISE CERTIFICATION TESTS

open access: yesНаука и техника, 2007
The methodology for identification of vehicle noise sources allows timely and without application of an expensive equipment to solve complicated scientific and technical problems connected with updating vehicles according to noise level created by them ...
E. V. Kunovsky
doaj   +1 more source

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