نتایج جستجو برای: noise maps

تعداد نتایج: 297329  

2016
Jacob R. Job Kyle Myers Koorosh Naghshineh Sharon A. Gill

Animals select and use habitats based on environmental features relevant to their ecology and behavior. For animals that use acoustic communication, the sound environment itself may be a critical feature, yet acoustic characteristics are not commonly measured when describing habitats and as a result, how habitats vary acoustically over space and time is poorly known. Such considerations are tim...

2000
Gary Hinshaw

We present an overview of the upcoming Microwave Anisotropy Probe (MAP) mission, with an emphasis on those aspects of the mission that simplify the data analysis. The method used to make sky maps from the differential temperature data is reviewed and we present some of the noise properties expected from these maps. An overview of the method we plan to use to mine the angular power spectrum from...

Journal: :Journal of magnetic resonance imaging : JMRI 1997
J L Boxerman B R Rosen R M Weisskoff

The use of cerebral blood volume (CBV) maps generated from dynamic MRI studies tracking the bolus passage of paramagnetic contrast agents strongly depends on the signal-to-noise ratio (SNR) of the maps. The authors present a semianalytic model for the noise in CBV maps and introduce analytic and Monte Carlo techniques for determining the effect of experimental parameters and processing strategi...

2004
T. A. Enßlin

We proposed a new method to calculate Faraday rotation measure (RM) maps from multifrequency polarisation angle data (Dolag et al.) in order to avoid the so-called nπ-ambiguity. Here we apply our Pacman algorithm to two polarisation data sets of extended radio sources, Abell 2255 and Hydra A, and compare the RM maps obtained using Pacman to RM maps obtained employing already existing methods. W...

2013
Luc P. J. Vosters Chris Varekamp Gerard de Haan

High quality 3D content generation requires high quality depth maps. In practice, depth maps generated by stereo-matching, depth sensingcameras, or decoders, have a low resolution and suffer from unreliable estimates and noise. Therefore depth post-processing is necessary. In this paper we benchmark state-of-the-art filter based depth upsampling methods on depth accuracy and interpolation quali...

1999
Bhuvnesh Jain Uros Seljak

Selected results on estimating cosmological parameters from simulated weak lensing data with noise are presented. Numerical simulations of ray tracing through N-body simulations have been used to generate shear and convergence maps due to lensing by large-scale structure. Noise due to the intrinsic ellipticities of a finite number of galaxies is added. In this contribution we present our main r...

2016
Cagdas Tuna Shengkui Zhao Thi Ngoc Tho Nguyen Douglas L. Jones

In recent years, environmental noise has become a major concern in large urban areas, significantly reducing the quality of life and health. The measurement, localization and monitoring of various environmental noise sources are the key elements of success in tackling the urban noise problem. However, the deployment of fixed microphones at a dense grid of locations becomes prohibitively expensi...

2017
Estrella Everss-Villalba Francisco Manuel Melgarejo-Meseguer Manuel Blanco-Velasco Francisco Javier Gimeno-Blanes Salvador Sala-Pla José Luis Rojo-Álvarez Arcadio García-Alberola

Noise and artifacts are inherent contaminating components and are particularly present in Holter electrocardiogram (ECG) monitoring. The presence of noise is even more significant in long-term monitoring (LTM) recordings, as these are collected for several days in patients following their daily activities; hence, strong artifact components can temporarily impair the clinical measurements from t...

2005
C. Vogt T. A. Enßlin

We proposed a new method – Pacman – to calculate Faraday rotation measure (RM) maps from multi-frequency polarisation angle data (Dolag et al.) in order to avoid the so-called nπambiguity. Here, we apply our Pacman algorithm to two polarisation data sets of extended radio sources in the Abell 2255 and the Hydra A cluster, and compare the RM maps obtained using Pacman to RM maps obtained employi...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2005
Marek Strumik Wiesław M Macek Stefano Redaelli

We consider the dynamics of the Hénon and Ikeda maps in the presence of additive and dynamical noise. We show that, from the point of view of computations of some statistical quantities, dynamical noise corrupting these deterministic systems can be considered effectively as an additive "pseudonoise" with the Cauchy distribution. In the case of the Hénon and Ikeda maps, this effect occurs only f...

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