Results 1  10
of
1,796
Loopy belief propagation for approximate inference: An empirical study. In:
 Proceedings of Uncertainty in AI,
, 1999
"... Abstract Recently, researchers have demonstrated that "loopy belief propagation" the use of Pearl's polytree algorithm in a Bayesian network with loops can perform well in the context of errorcorrecting codes. The most dramatic instance of this is the near Shannonlimit performanc ..."
Abstract

Cited by 676 (15 self)
 Add to MetaCart
, loopy belief propagation and sampling. We found that loopy belief propagation always con verged in this case with the average number of iter ations equal to 10.2. The experimental protocol for the toyQMR network was similar to that of the PYRAMID network except that we randomized over structure as well
1 Galactic and Accretion Disk Dynamos
, 1998
"... Dynamos in astrophysical disks are usually explained in terms of the standard alphaomega mean field dynamo model where the local helicity generates a radial field component from an azimuthal field. The subsequent shearing of the radial field gives rise to exponentially growing dynamo modes. There a ..."
Abstract
 Add to MetaCart
. There are several problems with this model. The exponentiation time for the galactic dynamo is hard to calculate, but is probably uncomfortably long. Moreover, numerical simulations of magnetic fields in shearing flows indicate that the presence of a dynamo does not depend on a nonzero average helicity. However
Optimal fiscal and monetary policy under sticky prices.
 Journal of Economic Theory
, 2004
"... Abstract This paper studies optimal fiscal and monetary policy under sticky product prices. The theoretical framework is a stochastic production economy without capital. The government finances an exogenous stream of purchases by levying distortionary income taxes, printing money, and issuing onep ..."
Abstract

Cited by 226 (13 self)
 Add to MetaCart
and tax rates, as in economies with real nonstatecontingent debt only. Finally, sluggish price adjustment raises the average nominal interest rate above the one called for by the Friedman rule. JEL Classification: E52, E61, E63.
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 ..."
Abstract

Cited by 197 (44 self)
 Add to MetaCart
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
Average
"... performance of the sparsest approximation in a dictionary François Malgouyres⋆ and Mila Nikolova• Abstract—Given data d ∈ RN, we consider its representation u ∗ involving the least number of nonzero elements (denoted by ℓ0(u∗)) using a dictionary A (represented by a matrix) under the constraint ‖ ..."
Abstract
 Add to MetaCart
performance of the sparsest approximation in a dictionary François Malgouyres⋆ and Mila Nikolova• Abstract—Given data d ∈ RN, we consider its representation u ∗ involving the least number of nonzero elements (denoted by ℓ0(u∗)) using a dictionary A (represented by a matrix) under the constraint
Nonlinear Analysis of the Eckhaus Instability: Modulated Amplitude Waves and Phase Chaos with Nonzero Average Phase Gradient
, 2001
"... We analyze the Eckhaus instability of plane waves in the onedimensional complex GinzburgLandau equation (CGLE) and describe the nonlinear effects arising in the Eckhaus unstable regime. Modulated amplitude waves (MAWs) are quasiperiodic solutions of the CGLE that emerge near the Eckhaus instabilit ..."
Abstract
 Add to MetaCart
instability of plane waves and cease to exist due to saddlenode bifurcations (SN). These MAWs can be characterized by their average phase gradient ν and by the spatial period P of the periodic amplitude modulation. A numerical bifurcation analysis reveals the existence and stability properties of MAWs
Optimal linear precoders for MIMO wireless correlated channels with nonzero mean in spacetime coded systems
 IEEE TRANS. SIGNAL PROCESSING
, 2006
"... This paper proposes linear precoder designs exploiting statistical channel knowledge at the transmitter in a multipleinput multipleoutput (MIMO) wireless system. The paper focuses on channel statistics, since obtaining realtime channel state information at the transmitter can be difficult due to ..."
Abstract

Cited by 31 (4 self)
 Add to MetaCart
error probability (PEP) between a pair of block codewords, averaged over channel fading statistics. Two PEP design criteria are studied—minimum distance and average distance. The optimal precoder with an orthogonal STBC is established, using a convex optimization framework. Different relaxations
Menu Costs, MultiProduct Firms, and Aggregate Fluctuations.” Manuscript. Federal Reserve Bank of Minneapolis
, 2006
"... This paper uses scanner price data collected in retail stores to document that (i) although the average magnitude of price changes is large, a substantial number of price changes are small in absolute value; (ii) the distribution of nonzero price changes has fat tails; and (iii) stores tend to adju ..."
Abstract

Cited by 123 (7 self)
 Add to MetaCart
This paper uses scanner price data collected in retail stores to document that (i) although the average magnitude of price changes is large, a substantial number of price changes are small in absolute value; (ii) the distribution of nonzero price changes has fat tails; and (iii) stores tend
Whom You Know Matters: Venture Capital Networks and Investment Performance,
 Journal of Finance
, 2007
"... Abstract Many financial markets are characterized by strong relationships and networks, rather than arm'slength, spotmarket transactions. We examine the performance consequences of this organizational choice in the context of relationships established when VCs syndicate portfolio company inv ..."
Abstract

Cited by 138 (8 self)
 Add to MetaCart
, let q ji be an indicator equaling one if at least one syndication relationship exists in which VC j was the lead investor and VC i was a syndicate member, and zero otherwise. VC i's indegree then equals Σ i q ji . Outdegree is a measure of a VC's ability to generate future co
Distributed average consensus with dithered quantization
 the IEEE Transactions of Signal Processing
, 2008
"... In this paper, we develop algorithms for distributed computation of averages of the node data over networks with bandwidth/power constraints or large volumes of data. Distributed averaging algorithms fail to achieve consensus when deterministic uniform quantization is adopted. We propose a distribut ..."
Abstract

Cited by 52 (1 self)
 Add to MetaCart
the evolution of the minimumlength interval containing the node values. We reveal that the length of this interval is a monotonically non–increasing function with limit zero. We also demonstrate that all the node values, in the worst case, converge to the final two quantization bins at the same rate
Results 1  10
of
1,796