نتایج جستجو برای: variance propagation

تعداد نتایج: 212400  

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 2000
C Moore M E Newman

We study percolation on small-world networks, which has been proposed as a simple model of the propagation of disease. The occupation probabilities of sites and bonds correspond to the susceptibility of individuals to the disease, and the transmissibility of the disease respectively. We give an exact solution of the model for both site and bond percolation, including the position of the percola...

Journal: :The Journal of the Acoustical Society of America 2007
Istvan I Papp Zoran M Saric Slobodan T Jovicic Nikola Dj Teslic

The main drawback of minimum variance distortionless response (MVDR) beamformer is the cancellation of the desired speech signal and its degradation in multi-path wave propagation environment. To make the adaptive algorithm robust against room reverberation and to prevent desired signal cancellation an estimation of unknown desired speaker's transfer function was proposed. The estimation is bas...

Journal: :Remote Sensing 2021

The strategy providing an estimation of both the mean velocity and temporal spatial spectra radial from data same pulse coherent Doppler lidar is proposed. Theoretical relations taking into account averaging over probing volume while estimating fluctuations measured by are presented. method turbulent energy dissipation rate variance vertical component wind vector carried out. results comparativ...

2006
Karsten Rink Arne-Michael Törsel Klaus D. Tönnies

We propose an algorithm for the segmentation of blood vessels in the kind of CT-data typical for diagnostics in a clinical environment. Due to poor quality and variance in the properties of the data sets a two level approach using implicit active contours is chosen for the task. A fast pre-segmentation using the fast marching method followed by propagation of a sparse field level set allows a r...

2010
Hidekata Hontani Wataru Watanabe

We propose a non-rigid surface registration method that registers a statistical point distribution model (PDM) to given images and that estimates the posterior marginal distribution of each of the points. We construct a statistical model of the locations of the points based on a set of corresponding points on training surfaces, which is generated by an entropy-based particle system. Given a new...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2010
Aglae Kellerer

The signal measured with a curvature sensor is analyzed. At the outset, we derive the required minimum number of sensing elements at the pupil edges, depending on the total number of sensing elements. The distribution of the sensor signal is further characterized in terms of its mean, variance, kurtosis, and skewness. It is established that while the approximation in terms of a Gaussian distrib...

Journal: :Signal Processing 2004
Fatiha Mrabti M. Elhajjami Mohcine Zouak

In many applications such as radar and mobile communication, the multipath propagation e5ects are described as a sum of contributions of a large number of wavefronts that arrives at the sensor array in clusters of rays, distributed around a nominal direction of the signal sources. Based on this observation and on the work of Bengtsson and Ottersten (Proceeding of Norsig-98, IEEE Nordic Signal P...

2006
HANNA K. JANKOWSKI

We examine the fluctuations of the empirical density measure for the colour version of the symmetric nearest neighbour zero range particle systems in dimension one. We show that the weak limit of these fluctuations is the solution of a system of coupled generalized Ornstein-Uhlenbeck processes. We also discuss how this result may be used to prove a central limit theorem for the tagged particle ...

Journal: :CoRR 2010
Laurent Decreusefond Philippe Martins Than-Tung Vu

This paper introduces a general theoretical framework to analyze noise limited networks. More precisely, we consider two homogenous Poisson point processes of base stations and users. General model of radio signal propagation and effect of fading are also considered. The main difference of our model with respect to other existing models is that a user connects to his best servers but not necess...

2007
Carla P. Gomes Jörg Hoffmann Ashish Sabharwal Bart Selman

A promising approach for model counting was recently introduced, which in theory requires the use of large random xor or parity constraints to obtain near-exact counts of solutions to Boolean formulas. In practice, however, short xor constraints are preferred as they allow better constraint propagation in SAT solvers. We narrow this gap between theory and practice by presenting experimental evi...

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