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1,252,783
KernelBased Object Tracking
, 2003
"... A new approach toward target representation and localization, the central component in visual tracking of nonrigid objects, is proposed. The feature histogram based target representations are regularized by spatial masking with an isotropic kernel. The masking induces spatiallysmooth similarity fu ..."
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Cited by 889 (4 self)
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functions suitable for gradientbased optimization, hence, the target localization problem can be formulated using the basin of attraction of the local maxima. We employ a metric derived from the Bhattacharyya coefficient as similarity measure, and use the mean shift procedure to perform the optimization
Axiomatic quantum field theory in curved spacetime
, 2008
"... The usual formulations of quantum field theory in Minkowski spacetime make crucial use of features—such as Poincare invariance and the existence of a preferred vacuum state—that are very special to Minkowski spacetime. In order to generalize the formulation of quantum field theory to arbitrary globa ..."
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Cited by 682 (18 self)
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and covariantly constructed from the spacetime metric), a microlocal spectrum condition, an "associativity" condition, and the requirement that the coefficient of the identity in the OPE of the product of a field with its adjoint have positive scaling degree. We prove curved spacetime versions
Estimating the Support of a HighDimensional Distribution
, 1999
"... Suppose you are given some dataset drawn from an underlying probability distribution P and you want to estimate a "simple" subset S of input space such that the probability that a test point drawn from P lies outside of S is bounded by some a priori specified between 0 and 1. We propo ..."
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Cited by 765 (29 self)
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of the weight vector in an associated feature space. The expansion coefficients are found by solving a quadratic programming problem, which we do by carrying out sequential optimization over pairs of input patterns. We also provide a preliminary theoretical analysis of the statistical performance of our
Homological Algebra of Mirror Symmetry
 in Proceedings of the International Congress of Mathematicians
, 1994
"... Mirror Symmetry was discovered several years ago in string theory as a duality between families of 3dimensional CalabiYau manifolds (more precisely, complex algebraic manifolds possessing holomorphic volume elements without zeroes). The name comes from the symmetry among Hodge numbers. For dual Ca ..."
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Cited by 521 (3 self)
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CalabiYau manifolds V, W of dimension n (not necessarily equal to 3) one has dim H p (V, Ω q) = dim H n−p (W, Ω q). Physicists conjectured that conformal field theories associated with mirror varieties are equivalent. Mathematically, MS is considered now as a relation between numbers of rational curves
Capacity of a Mobile MultipleAntenna Communication Link in Rayleigh Flat Fading
"... We analyze a mobile wireless link comprising M transmitter and N receiver antennas operating in a Rayleigh flatfading environment. The propagation coefficients between every pair of transmitter and receiver antennas are statistically independent and unknown; they remain constant for a coherence int ..."
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Cited by 490 (22 self)
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We analyze a mobile wireless link comprising M transmitter and N receiver antennas operating in a Rayleigh flatfading environment. The propagation coefficients between every pair of transmitter and receiver antennas are statistically independent and unknown; they remain constant for a coherence
On Association Coefficients, Correction for Chance, and Correction for Maximum Value
"... This paper studied correction for chance and correction for maximum value as functions on a space of association coefficients. Various properties of both functions are presented. It is shown that the two functions commute under composition; and that the composed function maps a coefficient and all i ..."
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This paper studied correction for chance and correction for maximum value as functions on a space of association coefficients. Various properties of both functions are presented. It is shown that the two functions commute under composition; and that the composed function maps a coefficient and all
Mixed Logit with Repeated Choices: Households' Choices Of Appliance Efficiency Level
, 1997
"... : Mixed logit models, also called randomparameters or errorcomponents logit, are a generalization of standard logit that do not exhibit the restrictive "independence from irrelevant alternatives" property and explicitly account for correlations in unobserved utility over repeated choices ..."
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Cited by 329 (10 self)
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of Appliance Efficiency Level 1. Introduction Mixed logit (also called randomparameters logit) generalizes standard logit by allowing the parameter associated with each observed variable (e.g., its coefficient) to vary randomly across customers. The moments of the distribution of customer
2475–2479 This journal is © The Royal Society of Chemistry 2008 Pu bl ish ed o n M ar ch 8. D ow nl oa de d by P en ns yl va ni a St at e U ni ve rs ity o n /0
, 2008
"... First published as an Advance Article on the web 3rd January 2001 The electrochemical generation and characterisation of a variety of oquinodimethanes (oQDMs) are described together with the outcome of preparative experiments in which they are key intermediates. The quinodimethanes are convenientl ..."
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Cited by 339 (7 self)
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First published as an Advance Article on the web 3rd January 2001 The electrochemical generation and characterisation of a variety of oquinodimethanes (oQDMs) are described together with the outcome of preparative experiments in which they are key intermediates. The quinodimethanes are conveniently formed, in DMF, by both direct and redoxcatalysed electroreduction of 1,2bis(halomethyl)arenes. Their predominant reaction is polymerisation to poly(oxylylene) (oPX) polymers. In the presence of dienophiles the electrogenerated oQDMs may undergo efficient cycloaddition reaction and distinctions between the possible mechanisms have been attempted on the basis of voltammetric, preparative and stereochemical experiments. Contrary to the precedent of the corresponding methyl ester, diphenyl maleate radicalanion isomerises only slowly to the fumarate radicalanion, yet coelectrolysis of 2,3bis(bromomethyl)1,4dimethoxybenzene and diphenyl maleate or diphenyl fumarate gives exclusively the corresponding transadduct. Coelectrolysis of dimethyl maleate with either 1,2bis(bromomethyl)benzene (more easily reduced) or 2,3bis(bromomethyl)1,4dimethoxybenzene (less easily reduced) gave only oPX polymer. The results are rationalised in terms of a double nucleophilic substitution mechanism where electron transfer between dienophile radicalanion and dihalide is relatively slow. Where electron transfer from maleate or fumarate radicalanions is likely to be fast oquinodimethanes are formed by redoxcatalysis and they polymerise rather than undergo Diels–Alder reaction. Dimerisation of the dienophile radicalanions, with k2 = 104 to 105 M1 s1, does not apparently compete with nucleophilic substitution or, where relevant, electron transfer.
Bayesian Compressive Sensing
, 2007
"... The data of interest are assumed to be represented as Ndimensional real vectors, and these vectors are compressible in some linear basis B, implying that the signal can be reconstructed accurately using only a small number M ≪ N of basisfunction coefficients associated with B. Compressive sensing ..."
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Cited by 324 (24 self)
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The data of interest are assumed to be represented as Ndimensional real vectors, and these vectors are compressible in some linear basis B, implying that the signal can be reconstructed accurately using only a small number M ≪ N of basisfunction coefficients associated with B. Compressive sensing
Nonlinear spatial normalization using basis functions
 Human Brain Mapping
, 1999
"... Abstract: We describe a comprehensive framework for performing rapid and automatic nonlabelbased nonlinear spatial normalizations. The approach adopted minimizes the residual squared difference between an image and a template of the same modality. In order to reduce the number of parameters to be f ..."
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Cited by 305 (18 self)
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to be fitted, the nonlinear warps are described by a linear combination of low spatial frequency basis functions. The objective is to determine the optimum coefficients for each of the bases by minimizing the sum of squared differences between the image and template, while simultaneously maximizing
Results 1  10
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1,252,783