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Acquiring parameters of implied global constraints

by Christian Bessiere, Rémi Coletta, Thierry Petit - Proceedings CP , 2005
"... Abstract. This paper presents a technique for learning parameterized implied constraints. They can be added to a model to improve the solving process. Experiments on impliedGcc constraints show the interest of our approach. 1 ..."
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Abstract. This paper presents a technique for learning parameterized implied constraints. They can be added to a model to improve the solving process. Experiments on impliedGcc constraints show the interest of our approach. 1

Improving timbre similarity: How high is the sky

by Jean-julien Aucouturier, Francois Pachet - Results in Speech and Audio Sciences
"... Abstract. We report on experiments done in an attempt to improve the performance of a music similarity measure which we introduced earlier. The technique aims at comparing music titles on the basis of their global “timbre”, which has many applications in the field of Music Information Retrieval. Suc ..."
Abstract - Cited by 181 (14 self) - Add to MetaCart
. Such measures of timbre similarity have seen a growing interest lately, and every contribution (including ours) is yet another instantiation of the same basic pattern recognition architecture, only with different algorithm variants and parameters. Most give encouraging results with a little effort, and imply

Whom You Know Matters: Venture Capital Networks and Investment Performance,

by Yael Hochberg , Alexander Ljungqvist , Yang Lu , Steve Drucker , Jan Eberly , Eric Green , Yaniv Grinstein , Josh Lerner , Laura Lindsey , Max Maksimovic , Roni Michaely , Maureen O'hara , Ludo Phalippou Mitch Petersen , Jesper Sorensen , Per Strömberg Morten Sorensen , Yael Hochberg , Johnson - Journal of Finance , 2007
"... Abstract Many financial markets are characterized by strong relationships and networks, rather than arm's-length, spot-market 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
been documented in the literature, the performance consequences of this organizational choice remain unknown. In the venture capital market, for instance, some VCs presumably have better-quality relationships and hence enjoy more influential network positions than others, implying differences

Thresholding Implied by Truncated Quadratic

by Mila Nikolova
"... Abstract—We address the problem of the estimation of an un-known signal that is known to involve sharp edges, from noisy data given at the output of a linear system. The sought solution is de-fined to be the global minimizer of an objective function combining a quadratic data-fidelity term and a reg ..."
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and to the regularization parameters. They can be used to derive necessary conditions for the choice of the regularization pa-rameters. We also show that the chance to get data for which the objective function has two or more global minimizers is null. Nu-merical experiments corroborate the obtained theoretical results

Materials for an exploratory theory of the network society.

by Manuel Castells , Anthony Giddens , Alain Touraine , Anthony Smith , Benjamin Barber , Peter Hall , Roger-Pol Droit , Sophie Watson , Frank Webster , Krishan Kumar , David Lyon , Craig Calhoun , Jeffrey Henderson , Ramon Ramos , Jose E Rodrigues-Ibanez , Jose F Tezanos , Mary Kaldor , Stephen Jones , Christopher Freeman - The British Journal of Sociology , 2000
"... ABSTRACT This article aims at proposing some elements for a grounded theor y of the network society. The network society is the social structure characteristic of the Information Age, as tentatively identi ed by empirical, cross-cultural investigation. It permeates most societies in the world, in v ..."
Abstract - Cited by 122 (0 self) - Add to MetaCart
of social structure that I call the network society for reasons that hopefully will become apparent. I shall summarize below the main features of these transformations, in a sequential order that does not imply hierarchy of causation in any way. We have entered a new technological paradigm, centred around

Anonymous Hierarchical Identity-Based Encryption (Without Random Oracles). In: Dwork

by Xavier Boyen , Brent Waters - CRYPTO 2006. LNCS, , 2006
"... Abstract We present an identity-based cryptosystem that features fully anonymous ciphertexts and hierarchical key delegation. We give a proof of security in the standard model, based on the mild Decision Linear complexity assumption in bilinear groups. The system is efficient and practical, with sm ..."
Abstract - Cited by 119 (10 self) - Add to MetaCart
to their "children". In all known HIBE schemes, re-randomization is enabled by a number of supplemental components in the public system parameters. Why this breaks anonymity is because the same mechanism that allows private keys to be publicly re-randomized, also allows ciphertexts to be publicly

Local stability implies global stability for the 2dimensional Ricker map

by Ferenc A. Bartha, Tibor Krisztin - J. Difference Equations and Applications
"... Consider the difference equation xk+1 = xkeα−xn−d where α is a positive parameter and d is a nonnegative integer. The case d = 0 was introduced by W.E. Ricker in 1954. For the delayed version d ≥ 1 of the equation S. Levin and R. May conjectured in 1976 that local stability of the nontrivial equilib ..."
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equilibrium implies its global stability. Based on rigorous, computer aided calculations and analytical tools, we prove the conjecture for d = 1.

Implied alignment: a synapomorphy-based multiple-sequence alignment method and its use in cladogram search

by Ward C. Wheeler - Cladistics
"... A method to align sequence data based on parsimonious synapomorphy schemes generated by direct optimization (DO; earlier termed optimization alignment) is proposed. DO directly diagnoses sequence data on cladograms without an intervening multiple-alignment step, thereby creating topology-specific, d ..."
Abstract - Cited by 32 (2 self) - Add to MetaCart
-specific, dynamic homology statements. Hence, no multiple-alignment is required to generate cladograms. Unlike general and globally optimal multiple-alignment procedures, the method described here, implied alignment (IA), takes these dynamic homologies and traces them back through a single cladogram, linking

The sun's total irradiance: cycles, trends and related climate change uncertainties since

by Judith Lean - Geophysical Research Letters , 1998
"... Abstract. A composite record of the Sun’s total irradi-ance compiled from measurements made by ve independent space-based radiometers since 1978 exhibits a prominent 11-year cycle with similar levels during 1986 and 1996, the two most recent minimum epochs of solar activity. This nding contradicts r ..."
Abstract - Cited by 80 (1 self) - Add to MetaCart
irradiance trend inferred from so-lar cycle length, a parameter used to imply a close linkage in the present century between solar variability and climate change.

2010), Estimation of conditional moment restrictions without assuming parameter identifiability in the implied unconditional moments

by Shih-hsun Hsu, Chung-ming Kuan - Journal of Econometrics, this issue
"... A well known difficulty in estimating conditional moment restrictions is that the parameters of interest need not be globally identified by the implied unconditional moments. In this paper, we propose an approach to constructing a continuum of unconditional moments that can ensure parameter identifi ..."
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A well known difficulty in estimating conditional moment restrictions is that the parameters of interest need not be globally identified by the implied unconditional moments. In this paper, we propose an approach to constructing a continuum of unconditional moments that can ensure parameter
Results 1 - 10 of 775