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1,901
A review of image denoising algorithms, with a new one
 SIMUL
, 2005
"... The search for efficient image denoising methods is still a valid challenge at the crossing of functional analysis and statistics. In spite of the sophistication of the recently proposed methods, most algorithms have not yet attained a desirable level of applicability. All show an outstanding perf ..."
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Cited by 508 (6 self)
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is proven to be asymptotically optimal under a generic statistical image model. The denoising performance of all considered methods are compared in four ways; mathematical: asymptotic order of magnitude of the method noise under regularity assumptions; perceptualmathematical: the algorithms artifacts
Policy invariance under reward transformations: Theory and application to reward shaping
 In Proceedings of the Sixteenth International Conference on Machine Learning
, 1999
"... This paper investigates conditions under which modifications to the reward function of a Markov decision process preserve the optimal policy. It is shown that, besides the positive linear transformation familiar from utility theory, one can add a reward for transitions between states that is express ..."
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Cited by 242 (8 self)
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that is expressible as the difference in value of an arbitrary potential function applied to those states. Furthermore, this is shown to be a necessary condition for invariance, in the sense that any other transformation may yield suboptimal policies unless further assumptions are made about the underlying MDP
Robustness of simple monetary policy rules under model uncertainty
 MONETARY POLICY RULES
, 1999
"... In this paper, we investigate the properties of alternative monetary policy rules using four structural macroeconometric models: the FuhrerMoore model, Taylor’s MultiCountry Model, the MSR model of Orphanides and Wieland, and the FRB staff model. All four models incorporate the assumptions of rat ..."
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Cited by 240 (31 self)
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to an upper bound on nominal interest rate volatility. Our analysis provides strong support for rules in which the firstdifference of the federal funds rate responds to the current output gap and the deviation of the oneyear average inflation rate from a specified target. In all four models, firstdifference
On The Capacity Of Wireless Networks: The Relay Case
 in Proc. IEEE INFOCOM
, 2002
"... In [1], Gupta and Kumar determined the capacity of wireless networks under certain assumptions, among them pointtopoint coding, which excludes for example multiaccess and broadcast codes. In this paper, we consider essentially the same physical model of a wireless network under a different traffi ..."
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Cited by 233 (11 self)
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In [1], Gupta and Kumar determined the capacity of wireless networks under certain assumptions, among them pointtopoint coding, which excludes for example multiaccess and broadcast codes. In this paper, we consider essentially the same physical model of a wireless network under a different
Some A Posteriori Error Estimators For Elliptic Partial Differential Equations
 MATHEMATICS OF COMPUTATION
, 1985
"... We present three new a posteriori error estimators in the energy norm for finite element solutions to elliptic partial differential equations. The estimators are based on solving local Neumann problems in each element. The estimators differ in how they enforce consistency of the Neumann problems. We ..."
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Cited by 215 (4 self)
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. We prove that as the mesh size decreases, under suitable assumptions, two of the estimators approach upper bounds on the norm of the true error, and all three estimators are within multiplicative constants of the norm of the true error. We present numerical results in which one of the estimators
SRB measures for partially hyperbolic systems whose central direction is mostly expanding
, 2000
"... We construct SinaiRuelleBowen (SRB) measures supported on partially hyperbolic sets of diffeomorphisms  the tangent bundle splits into two invariant subbundles, one of which is uniformly contracting  under the assumption that the complementary subbundle is nonuniformly expanding. If the r ..."
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Cited by 197 (44 self)
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We construct SinaiRuelleBowen (SRB) measures supported on partially hyperbolic sets of diffeomorphisms  the tangent bundle splits into two invariant subbundles, one of which is uniformly contracting  under the assumption that the complementary subbundle is nonuniformly expanding
Coil sensitivity encoding for fast MRI. In:
 Proceedings of the ISMRM 6th Annual Meeting,
, 1998
"... New theoretical and practical concepts are presented for considerably enhancing the performance of magnetic resonance imaging (MRI) by means of arrays of multiple receiver coils. Sensitivity encoding (SENSE) is based on the fact that receiver sensitivity generally has an encoding effect complementa ..."
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Cited by 193 (3 self)
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and technical concerns, inherent limits of kspace speed have almost been reached. An entirely different approach to subwavelength resolution in MRI is based on the fact that with a receiver placed near the object the contribution of a signal source to the induced voltage varies appreciably with its relative
Bounding Preference Parameters under Different Assumptions About Beliefs: A
"... Part of this paper first appeared in Bellemare, Bissonnette, and Kröger (2007). An OX code with files implementing ..."
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Part of this paper first appeared in Bellemare, Bissonnette, and Kröger (2007). An OX code with files implementing
Distance Lower Bounding
"... Abstract. Distance (upper)bounding (DUB) allows a verifier to know whether a proving party is located within a certain distance bound. DUB protocols have many applications in secure authentication and location based services. We consider the dual problem of distance lower bounding (DLB), where the ..."
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Abstract. Distance (upper)bounding (DUB) allows a verifier to know whether a proving party is located within a certain distance bound. DUB protocols have many applications in secure authentication and location based services. We consider the dual problem of distance lower bounding (DLB), where
Continuoustime averagepreserving opinion dynamics with opiniondependent communications
, 2010
"... We study a simple continuoustime multiagent system related to Krause’s model of opinion dynamics: each agent holds a real value, and this value is continuously attracted by every other value differing from it by less than 1, with an intensity proportional to the difference. We prove convergence t ..."
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Cited by 28 (7 self)
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to a set of clusters, with the agents in each cluster sharing a common value, and provide a lower bound on the distance between clusters at a stable equilibrium, under a suitable notion of multiagent system stability. To better understand the behavior of the system for a large number of agents, we
Results 1  10
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1,901