Results 281 to 290 of about 822,192 (311)
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Sampling from compositional and directional distributions
Statistics and Computing, 2006This paper describes a method for sampling from a non-standard distribution which is important in both population genetics and directional statistics. Current approaches rely on complicated procedures which do not work well, if at all, in high dimensions and usual parameter set-ups.
Alfred Kume, Stephen G. Walker
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A new sampling method in the DIRECT algorithm
Applied Mathematics and Computation, 2006zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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A direct calculation of moments of the sample variance
Mathematics and Computers in Simulation, 2012Let \(V\) be the sample variance of an i.i.d. sample \(X_1,\dots,X_N\). The authors propose a new method of representation of \(\mathbf{E} V^j\) as a polynomial from the moments \(\mathbf{E}(X_1)^i\). It is based on the representation of \(\mathbf{E} V^j\) as a weighted sum of \(\mathbf{E} \left(\sum_{j=1}^N X_j^2\right)^m\left(\sum_{j=1}^N X_j\right ...
Gonzalo Vegas-Sánchez-Ferrero +3 more
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Uniform Sampling for Directed P2P Networks
2009Selecting a random peer with uniform probability across a peer-to-peer (P2P) network is a fundamental function for unstructured search, data replication, and monitoring algorithms. Such uniform sampling is supported by several techniques. However, current techniques suffer from sample bias and limited applicability. In this paper, we present a sampling
Cyrus P. Hall, Antonio Carzaniga
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Sampling Optimization for Printer Characterization by Direct Search
IEEE Transactions on Image Processing, 2012Printer characterization usually requires many printer inputs and corresponding color measurements of the printed outputs. In this brief, a sampling optimization for printer characterization on the basis of direct search is proposed to maintain high color accuracy with a reduction in the number of characterization samples required.
BIANCO, SIMONE, SCHETTINI, RAIMONDO
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Direct Volume Rendering of Irregular Samples
1995Visualization of concentrations and density values is one of the main tasks of volume rendering systems. Whenever the sample points are not located on any kind of structured grid most visualization tools are not able to display the data without expensive resampling.
René T. Rau, Wolfgang Straßer
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Journal of Computational and Graphical Statistics, 2011
Stephen G. Walker +3 more
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Stephen G. Walker +3 more
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Explaining adaptive radial-based direction sampling [PDF]
, 2003 In this short paper we summarize the computational steps of Adaptive Radial-Based Direction Sampling (ARDS), which can be used for Bayesian analysis of ill behaved target densities. We consider one simulation experiment in order to illustrate the good performance of ARDS relative to the independence chain MH algorithm and importance sampling.
Bauwens, L. +3 more
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