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See detailGeneralization of automatic sequences for numeration systems on a regular language
Rigo, Michel ULg

in Theoretical Computer Science (2000), 244

Let L be an infinite regular language on a totally ordered alphabet (Σ,<). Feeding a finite deterministic automaton (with output) with the words of L, enumerated lexicographically with respect to <, leads ... [more ▼]

Let L be an infinite regular language on a totally ordered alphabet (Σ,<). Feeding a finite deterministic automaton (with output) with the words of L, enumerated lexicographically with respect to <, leads to an infinite sequence over the output alphabet of the automaton. This process generalizes the concept of k-automatic sequence for abstract numeration systems on a regular language (instead of systems in base k). Here, we study the first properties of these sequences and their relations with numeration systems. [less ▲]

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See detailA Generalization of Cobham's Theorem to Automata over Real Numbers
Boigelot, Bernard ULg; Brusten, Julien ULg

in Lecture Notes in Computer Science (2007, July), 4596

This paper studies the expressive power of finite-state automata recognizing sets of real numbers encoded positionally. It is known that the sets that are definable in the first-order additive theory of ... [more ▼]

This paper studies the expressive power of finite-state automata recognizing sets of real numbers encoded positionally. It is known that the sets that are definable in the first-order additive theory of real and integer variables (R, Z, +, <) can all be recognized by weak deterministic Büchi automata, regardless of the encoding base r > 1. In this paper, we prove the reciprocal property, i.e., that a subset of R that is recognizable by weak deterministic automata in every base r > 1 is necessarily definable in (R, Z, +, <). This result generalizes to real numbers the well-known Cobham's theorem on the finite-state recognizability of sets of integers. Our proof gives interesting insight into the internal structure of automata recognizing sets of real numbers, which may lead to efficient data structures for handling these sets. [less ▲]

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See detailA generalization of Cobham's theorem to automata over real numbers
Boigelot, Bernard ULg; Brusten, Julien ULg

in Theoretical Computer Science (2009), 410(18), 1694-1703

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See detailA Generalization of Semenov's Theorem to Automata over Real Numbers
Boigelot, Bernard ULg; Brusten, Julien ULg; Leroux, Jérôme

in Lecture Notes in Artificial Intelligence (2009), 5663

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See detailGeneralized (m, k)-Zipf law for fractional Brownian motion-like time series with or without effect of an additional linear trend
Bronlet, Philippe ULg; Ausloos, Marcel ULg

in International Journal of Modern Physics C (2003), 14(3), 351-365

We have translated fractional Brownian motion (FBM) signals into a text based on two "letters", as if the signal fluctuations correspond to a constant stepsize random walk. We have applied the Zipf method ... [more ▼]

We have translated fractional Brownian motion (FBM) signals into a text based on two "letters", as if the signal fluctuations correspond to a constant stepsize random walk. We have applied the Zipf method to extract the zeta' exponent relating the word frequency and its rank on a log-log plot. We have studied the variation of the Zipf exponent(s) giving the relationship between the frequency of occurrence of words of length m < 8 made of such two letters: zeta' is varying as a power law in terms of m. We have also searched how the zeta' exponent of the Zipf law is influenced by a linear trend and the resulting effect of its slope. We can distinguish finite size effects, and results depending whether the starting FBM is persistent or not, i.e., depending on the FBM Hurst exponent H. It seems then numerically proven that the Zipf exponent of a persistent signal is more influenced by the trend than that of an antipersistent signal. It appears that the conjectured law zeta' = \2H - 1\ only holds near H = 0.5. We have also introduced considerations based on the notion of a time dependent Zipf law along the signal. [less ▲]

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See detailA generalized algorithm for efficient photometric reductions
Manfroid, Jean ULg; Heck, A.

in Astronomy and Astrophysics (1983), 120

The authors present a generalized method applicable to the reduction of photometric observations in any well-defined system. The method is characterized by the use of practically every measurement of any ... [more ▼]

The authors present a generalized method applicable to the reduction of photometric observations in any well-defined system. The method is characterized by the use of practically every measurement of any non-variable star in the reduction procedure. Its main advantages are a greater accuracy and a substantial saving of observing time on extinction and standard stars. A particular case of application to the uvby system is detailed and discussed. [less ▲]

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See detailA generalized approach for historical mock-up acquisition and data modelling: towards historically enriched 3D city models
Hervy; Billen, Roland ULg; Laroche, Florent et al

in Leduc, Thomas; Moreau, Guillaume; Billen, Roland (Eds.) Usage, Usability, and Utility of 3D City models (2012)

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See detailA Generalized Caprine-like Hypoplasia Syndrome is localized within a 6-cM interval on bovine chromosome 13 in the Montbeliarde breed.
Duchesne, A.; Manciaux, L.; Gautier, M. et al

in Animal Genetics (2008), 39(2), 112-20

Caprine-like Generalized Hypoplasia Syndrome (or SHGC) is a new hereditary disorder described in the Montbeliarde breed. We report here the characterization of this new disease, based on the visual ... [more ▼]

Caprine-like Generalized Hypoplasia Syndrome (or SHGC) is a new hereditary disorder described in the Montbeliarde breed. We report here the characterization of this new disease, based on the visual examination of animals affected by SHGC, and on physiological and biochemical studies undertaken on samples of both SHGC and normal animals. Biological samples for more than 150 affected calves and their parents have been collected over the past 4 years within the framework of the Bovine Genetic Disease Observatory. First, pedigree analyses showed that the mode of inheritance is most probably autosomal recessive. Then, a genome scan with 113 animals and 140 microsatellite markers revealed a single locus within a 35-cM region on bovine chromosome 13. Genotypes of 261 animals for 18 new microsatellite markers from the region confirmed the localization of the disorder to a 6-cM interval. Finally, based on the analysis of haplotypes in 463 Montbeliarde sires, we estimated the frequency of the SHGC mutated allele in the population and could propose a strategy for the systematic eradication of this disorder in the near future. [less ▲]

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See detailGeneralized Cloaking and Optical Polyjuice
Nicolet, A.; Zolla, F.; Geuzaine, Christophe ULg

in Proceedings of the 8th International Symposium on Electric and Magnetic Fields (EMF'2009) (2009)

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See detailGeneralized Cloaking and Optical Polyjuice
Nicolet, A.; Zolla, F.; Geuzaine, Christophe ULg

in Proceedings of the 8th conference on Electrical, Transport and Optical Properties of Inhomogeneous Media (ETOPIM 8) (2009)

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See detailGeneralized Expectation-Maximization segmentation of brain MR images
Devalkeneer, Arnaud A.; Robe, Pierre A.; Verly, Jacques ULg et al

Conference (2006)

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See detailGeneralized Fourier equations and thermoconvective instabilities
Dauby, Pierre ULg; Nelis, M.; Lebon, Georgy ULg

in Revista Mexicana De Fisica (2002), 48(Suppl. 1), 57-62

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See detailA generalized frequency domain reflectometry forward and inverse modeling technique for soil electrical properties determination
Minet, Julien ULg; Lambot, Sébastien; Delaide, Géraldine et al

in Vadose Zone Journal (2010), 9(4)

We have developed a generalized frequency domain reflectometry (FDR) technique for soil characterization that is based on an electromagnetic model decoupling the cable and probe head from the ground using ... [more ▼]

We have developed a generalized frequency domain reflectometry (FDR) technique for soil characterization that is based on an electromagnetic model decoupling the cable and probe head from the ground using frequency-dependent reflection and transmission transfer functions. The FDR model represents an exact solution of Maxwell’s equations for wave propagation in one-dimensional multilayered media. The benefit of the decoupling is that the FDR probe can be fully described by its characteristic transfer functions, which are determined using only a few measurements. The soil properties are retrieved after removing the probe effects from the raw FDR data by iteratively inverting a global reflection coefficient. The proposed method was validated under laboratory conditions for measurements in water with different salt concentrations and sand with different water contents. For the salt water, inversions of the data led to dielectric permittivity and electrical conductivity values very close to the expected theoretical or measured values. In the frequency range for which the probe is efficient, a good agreement was obtained between measured, inverted and theoretically predicted signals. For the sand, results were consistent with the different water contents and also in close agreement with traditional time domain reflectometry measurements. The proposed method offers great promise for accurate soil electrical characterization because it inherently permits maximization of the information that can be retrieved from the FDR data and shows a high practicability. [less ▲]

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See detailGeneralized iterative algorithm for spectral signal deconvolution
Van Droogenbroeck, Marc ULg

in Sixth European Signal Processing Conference (EURASIP) (1992, August)

A generalized iterative algorithm for spectral signal deconvolution is presented in this paper. It works for signals characterized by a small number of spectral components. The algorithm combines the ... [more ▼]

A generalized iterative algorithm for spectral signal deconvolution is presented in this paper. It works for signals characterized by a small number of spectral components. The algorithm combines the selective deconvolution which is an iterative spectral deconvolution technique and a subband decomposition. It offers a new way for finding optimal methods of spatial extrapolation and leads to important computational savings. [less ▲]

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See detailGeneralized life and motion configurations reasoning model
Hallot, Pierre ULg; Billen, Roland ULg

Conference (2008, September)

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See detailA Generalized Likelihood Ratio Test for Adaptive Gas Turbine Performance Monitoring
Borguet, Sébastien ULg; Léonard, Olivier ULg

in Journal of Engineering for Gas Turbines & Power (2009), 131(1),

Kalman filters are widely used in the turbine engine community for health monitoring purposes. This algorithm has proven its capability to track gradual deterioration with good accuracy. On the other hand ... [more ▼]

Kalman filters are widely used in the turbine engine community for health monitoring purposes. This algorithm has proven its capability to track gradual deterioration with good accuracy. On the other hand, its response to rapid deterioration is a long delay in recognizing the fault and/or a spread of the estimated fault on several components. The main reason for this deficiency lies in the transition model of the parameters that is blended in the Kalman filter and assumes a smooth evolution of the engine condition. This contribution reports the development of an adaptive diagnosis tool that combines a Kalman filter and a secondary system that monitors the residuals. This auxiliary component implements a generalized likelihood ratio test in order to detect and estimate all abrupt fault. The enhancement in terms of accuracy and reactivity brought by this adaptive Kalman filter is highlighted for a variety of simulated fault cases that may be encountered on a commercial aircraft engine. [DOI: 10.1115/1.2967493] [less ▲]

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See detailA generalized logistic regression procedure to detect differential item functioning among multiple groups
Magis, David ULg; Raîche, Gilles; Béland, Sébastien et al

in International Journal of Testing (2011), 11

We present an extension of the logistic regression procedure to identify dichotomous differential item functioning (DIF) in the presence of more than two groups of respondents. Starting from the usual ... [more ▼]

We present an extension of the logistic regression procedure to identify dichotomous differential item functioning (DIF) in the presence of more than two groups of respondents. Starting from the usual framework of a single focal group, we propose a general approach to estimate the item response functions in each group and to test for the presence of uniform DIF, non uniform DIF, or both. This generalized procedure is compared to other existing DIF methods for multiple groups with a real data set on language skill assessment. Emphasis is put on the flexibility, completeness and computational easiness of the generalized method. [less ▲]

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See detailA generalized method for deriving mass-loss rates - The first order moment of unsaturated P Cygni line profiles
Surdej, Jean ULg

in Astrophysics & Space Science (1983), 90

For the case of optically thin lines, we show that the relation existing between the first order moment W1 ~ j (E(2)/E~ - 1)(2 - 212) d2 of a P Cygni profile and the quantity ii~in(1eve1), where M is the ... [more ▼]

For the case of optically thin lines, we show that the relation existing between the first order moment W1 ~ j (E(2)/E~ - 1)(2 - 212) d2 of a P Cygni profile and the quantity ii~in(1eve1), where M is the mass-loss rate of the central star and n(level) the fractional abundance of the ion under study, is in fact independent of any Sobolev-type approximations used for the transfer of line radiation, contrary to what has been assumed in some previous works (Castor eta!., 1981; Surdej, 1982). Consequently, all results established in the context of'very rapidly' expanding atmospheres and mainly referring to the non-dependence of W1 vs various physical (underlying photospheric absorption line, limb darkening, etc.) and geometrical (velocity field v(r), etc.) effects remain unchanged for arbitrary (e.g. non-Sobolev type) outward-accelerating velocity laws. Whenever applied with caution, Equation (50) thus provides a very powerful means of deriving mass-loss rates - with a total uncertainty less than 60 percent - from the measurement W1 of unsaturated P Cygni profiles observed in the spectrum of early - as well as late - type stars, quasars, etc [less ▲]

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See detailA Generalized Method of Moving Asymptotes (GMMA) Including Equality Constraints
Zhang, Weihong; Fleury, Claude ULg; Duysinx, Pierre ULg et al

in Structural Optimization (1996), 12(2/3), 143-146

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See detailGeneralized multipole technique with directive beam expansions
Landesa, Luis; V Sabariego, Ruth ULg; Jose Manuel, Taboada

(1999, September)

Detailed reference viewed: 11 (2 ULg)