Reducing the Variance of Likelihood Ratio Greeks with Monte CarloWe investigate the use of Antithetic Variables, Control Variates and Importance Sampling to reduce the statistical errors of option sensitivities calculated with the Likelihood Ratio Method in Monte…Luca Capriotti·Aug 18, 2008SaveLearn
Symmetries and modelling functions for diffusion processesA constructive approach to theory of diffusion processes is proposed, which is based on application of both the symmetry analysis and method of modelling functions. An algorithm for construction of…A. G. Nikitin, S. V. Spichak, Yu. S. Vedula et al.·Aug 15, 2008SaveLearn
Pseudo-nonstationarity in the scaling exponents of finite interval time seriesThe accurate estimation of scaling exponents is central in the observational study of scale-invariant phenomena. Natural systems unavoidably provide observations over restricted intervals;…K. H. Kiyani, S. C. Chapman, N. W. Watkins·Aug 14, 2008SaveLearn
Detecting groups of similar components in complex networksWe study how to detect groups in a complex network each of which consists of component nodes sharing a similar connection pattern. Based on the mixture models and the exploratory analysis set up by…J. Wang, C. -H. Lai·Aug 12, 2008SaveLearn
Applying Bayesian Neural Networks to Separate Neutrino Events from Backgrounds in Reactor Neutrino ExperimentsA toy detector has been designed to simulate central detectors in reactor neutrino experiments in the paper. The samples of neutrino events and three major backgrounds from the Monte-Carlo simulation…Ye Xu, Yixiong Meng, Weiwei Xu·Aug 2, 2008SaveLearn
Lectures on Probability, Entropy, and Statistical PhysicsThese lectures deal with the problem of inductive inference, that is, the problem of reasoning under conditions of incomplete information. Is there a general method for handling uncertainty? Or, at…Ariel Caticha·Jul 31, 2008SaveLearn
Data analysis recipes: Choosing the binning for a histogramData points are placed in bins when a histogram is created, but there is always a decision to be made about the number or width of the bins. This decision is often made arbitrarily or subjectively,…David W. Hogg·Jul 30, 2008SaveLearn
Information filtering based on transferring similarityIn this Brief Report, we propose a new index of user similarity, namely the transferring similarity, which involves all high-order similarities between users. Accordingly, we design a modified…Duo Sun, Tao Zhou, Jian-Guo Liu et al.·Jul 28, 2008SaveLearn
Source separation techniques for characterising cosmic ray transients from neutron monitor networksThe analysis of weak variations in the energetic particle flux, as detected by neutron or muon monitors, can often be considerably improved by analysing data from monitor networks and thereby…T. Dudok de Wit, A. A. Chilingarian, G. G. Karapetyan·Jul 28, 2008SaveLearn
The Ups and Downs of Modeling Financial Time Series with Wiener Process MixturesStarting from inhomogeneous time scaling and linear decorrelation between successive price returns, Baldovin and Stella recently proposed a way to build a model describing the time evolution of a…Damien Challet, Pier Paolo Peirano·Jul 25, 2008SaveLearn
Instantaneous oscillatory direction and phase for multivariate timeseriesThis text describes a generalization of the analytic signal (Gabor, 1946) approach for the definition of instantaneous amplitude and phase to the case of multivariate signals. It was originally…Carsten Allefeld·Jul 22, 2008SaveLearn
A New Car-Following Model Inspired by Galton BoardDifferent from previous models based on scatter theory and random matrix theory, a new interpretation of the observed log-normal type time-headway distribution of vehicles is presented in this paper.…Fa Wang, Li Li, Xuexiang Jin et al.·Jul 21, 2008SaveLearn
Universal analytic properties of noise. Introducing the J-Matrix formalismWe propose a new method in the spectral analysis of noisy time-series data for damped oscillators. From the Jacobi three terms recursive relation for the denominators of the Padé Approximations built…Daniel Bessis, Luca Perotti·Jul 19, 2008SaveLearn
Negro and Danube are mirror riversWe study the European river Danube and the South American river Negro daily water levels. We present a fit for the Negro daily water level period and standard deviation. Unexpectedly, we discover…R. Gonçalves, A. A. Pinto·Jul 18, 2008SaveLearn
Statistical switching kinetics in ferroelectricsBy assuming a more realistic nucleation and polarization reversal scenario we build a new statistical switching model for ferroelectrics, which is different from either the…X. J. Lou·Jul 16, 2008SaveLearn
Spectral Density of Sample Covariance Matrices of Colored NoiseWe study the dependence of the spectral density of the covariance matrix ensemble on the power spectrum of the underlying multivariate signal. The white noise signal leads to the celebrated…Emil Dolezal, Petr Seba·Jul 15, 2008SaveLearn
A Test for the Presence of a Signal, with Multiple Channels and Marked PoissonWe describe a statistical hypothesis test for the presence of a signal based on the likelihood ratio statistic. We derive the test for a special case of interest. We study extensions of the test to…Wolfgang A. Rolke, Angel M. Lopez·Jul 14, 2008SaveLearn
Testing a priority-based queue model with Linux command historiesWe study human dynamics by analyzing Linux history files. The goodness-of-fit test shows that most of the collected datasets belong to the universality class suggested in the literature by a…Seung Ki Baek, Tae Young Kim, Beom Jun Kim·Jul 14, 2008SaveLearn
Universal, Continuous-Discrete Nonlinear Yau Filtering I: Affine, Linear State Model with State-Independent Diffusion MatrixThe continuous-discrete filtering problem requires the solution of a partial differential equation known as the Fokker-Planck-Kolmogorov forward equation (FPKfe). In this paper, it is pointed out…Bhashyam Balaji·Jul 10, 2008SaveLearn
Model based IVHM system for the solid rocket boosterWe report progress in the development of a model-based hybrid probabilistic approach to an on-board IVHM for solid rocket boosters (SRBs) that can accommodate the abrupt changes of the model…D. G. Luchinsky, V. V. Osipov, V. N. Smelyanskiy et al.·Jul 9, 2008SaveLearn
An Ad-Hoc Method for Obtaining chi**2 Values from Unbinned Maximum Likelihood FitsA common goal in an experimental physics analysis is to extract information from a reaction with multi-dimensional kinematics. The preferred method for such a task is typically the unbinned maximum…M. Williams, C. A. Meyer·Jun 30, 2008SaveLearn
Empirical Tests of Zipf's law Mechanism In Open Source Linux DistributionThe evolution of open source software projects in Linux distributions offers a remarkable example of a growing complex self-organizing adaptive system, exhibiting Zipf's law over four full…T. Maillart, D. Sornette, S. Spaeth et al.·Jun 30, 2008SaveLearn
Statistical auditing and randomness test of lotto k/N-type gamesOne of the most popular lottery games worldwide is the so-called ``lotto k/N''. It considers N numbers 1,2,...,N from which k are drawn randomly, without replacement. A player selects k or…H. F. Coronel-Brizio, A. R. Hernandez-Montoya, Fabio Rapallo et al.·Jun 27, 2008SaveLearn
Comparison of Scatchard and Klotz methods for Metal(II) -DNA complexes in the case two type of bindingIt was shown, that modified Scatchard plots and Klotz properties of graphical representations of two classes of binding sites could be used to determine binding constants of metal ion to DNA. More…Eteri Gelagutashvili·Jun 20, 2008SaveLearn
Differential fast fixed-point algorithms for underdetermined instantaneous and convolutive partial blind source separationThis paper concerns underdetermined linear instantaneous and convolutive blind source separation (BSS), i.e., the case when the number of observed mixed signals is lower than the number of sources.We…J. Thomas, Y. Deville, Shahram Hosseini·Jun 19, 2008SaveLearn