Results 231 to 240 of about 1,046,371 (288)

Image reconstruction and elongation artifact reduction for a dual-panel dedicated prostate PET scanner. [PDF]

open access: yesMed Phys
Saberi Manesh A   +7 more
europepmc   +1 more source

Urban noise model

The Journal of the Acoustical Society of America, 1974
A model has been developed for predicting median levels of traffic noise in a variety of local conditions. Sound sources are grouped into two categories: major thoroughfares with average daily traffic volume greater than 5000 vehicles are considered individually as line sources with uniform distribution of traffic and all other streets are grouped into
J B, Malchaire, S W, Horstman
openaire   +2 more sources

Aircraft noise immission modeling

CEAS Aeronautical Journal, 2019
This contribution to the CEAS special edition Aircraft Noise Generation and Assessment focuses on the simulation of the aircraft noise immission, i.e., the aircraft noise received on the ground. This process includes two steps, the description of the sound emission by the aircraft and the modeling of the sound propagation through the atmosphere.
Isermann, Ullrich, Bertsch, Lothar
openaire   +2 more sources

Noise modeling, noise experiment, and noise inversion

The Journal of the Acoustical Society of America, 2005
Recent developments in inverting ambient noise to obtain bottom reflection properties originated from an understanding of noise behavior and from noise modeling. Sea-surface noise can be modeled equivalently as a ray, wave, or mode phenomenon, but often the ray or flux approach provides the most insight (explaining, e.g., the noise-notch or low ...
openaire   +1 more source

Noise Modeling

2017
Chapter 3 introduces the Box-Jenkins AutoRegressive Integrated Moving Average (ARIMA) noise modeling strategy. The strategy begins with a test of the Normality assumption using a Kolomogov-Smirnov (KS) statistic. Non-Normal time series are transformed with a Box-Cox procedure is applied.
Richard McCleary   +2 more
openaire   +1 more source

Rotorcraft noise model

The Journal of the Acoustical Society of America, 1997
The rotorcraft noise model (RNM) is a multiplatform computer program being developed for NASA-Langley Research Center which calculates sound levels at receiver positions on the ground from helicopter and tiltrotor operations. RNM calculates levels at positions on a uniform grid or a specific defined locations.
Michael J. Lucas, Michael A. Marcolini
openaire   +1 more source

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