Éditeur(s) : HAL CCSD IEEE
Résumé : Object classification is a challenging task in computer vision. Many approaches have been proposed to extract meaningful descriptors from images and classifying them in a supervised learning framework. In this paper, we revisit the classic k-nearest neighbors (k-NN) classification rule, which has shown to be very effective when dealing with local image descriptors. However, k-NN still features some major drawbacks, mainly due to the uniform voting among the nearest prototypes in the feature space. In this paper, we propose a generalization of the classic k-NN rule in a supervised learning (boosting) framework. Namely, we redefine the voting rule as a strong classifier that linearly combines predictions from the k closest prototypes. To induce this classifier, we propose a novel learning algorithm, MLNN (Multiclass Leveraged Nearest Neighbors), which gives a simple procedure for performing prototype selection very efficiently. We tested our method on 12 categories of objects, and observed significant improvement over classic k-NN in terms of classification performances.
International Workshop on Image Analysis for Multimedia Interactive Services
Desenzano del Garda, Italy

hal-00481725
https://hal.archives-ouvertes.fr/hal-00481725
https://hal.archives-ouvertes.fr/hal-00481725/document
https://hal.archives-ouvertes.fr/hal-00481725/file/pbnn_wiamis_10.pdf

Éditeur(s) : HAL CCSD EDP Sciences
Résumé : International audience
By means of convenient regularization for an ill posed Cauchy problem, we define an associated generalized problem and discuss the conditions for the solvability of it. To illustrate this, starting from the semilinear unidirectional wave equation with data given on a characteristic curve, we show existence and uniqueness of the solution
ISSN: 0973-5348

hal-01529519
https://hal.univ-antilles.fr/hal-01529519
DOI : 10.1051/mmnp/201611207

Éditeur(s) : HAL CCSD L'Harmattan
Résumé : National audience
o abstract
ISSN: 1267-5059

hal-01454722
http://hal.univ-reunion.fr/hal-01454722

Éditeur(s) : HAL CCSD EDP Sciences
Résumé : International audience
We show that the so-called low-regret (or least-regret) control by J. L. Lions [8] fits on the control of ill-posed problems. At each time, we give the characterization of the so-called no-regret control by means of singular optimality systems. For the backward heat ill-posed problem, no Slater hypothesis is assumed on the admissible set of controls ${{cal U}_{mbox{ iny ad}}}$. This work is two pieces, and two methods are considered : the regularization method and the null-controllability method. For the first method, a zero order corrector is used, while for the second method, the passage to the limit is easy. The results presented here generalize the works in [2,3] to the no-regret control.
ISSN: 1270-900X

hal-00720814
https://hal.univ-antilles.fr/hal-00720814
https://hal.univ-antilles.fr/hal-00720814/document
https://hal.univ-antilles.fr/hal-00720814/file/esaimpr1.pdf

Éditeur(s) : HAL CCSD
Résumé : International audience
Le tourisme à la ferme fait l'objet d'un intérêt croissant, tant de la part des médias que des élus, en cette période de crise que traversent de nombreuses zones rurales où dominaient traditionnellement les activités et les emplois agricoles.En effet, en raison de l'affirmation du secteur touristique dans l'économie et des nouvelles attentes des clientèles urbaines en quête de verdure, d'authenticité et de qualité, il semble qu'il y ait une "opportunité à saisir" pour les agriculteurs confrontés à une remise en cause de leur mode de production, de leur mode de vie. Après les décennies de travail vouées à l'intensification et à la spécialisation, les difficultés actuelles imposent à nombre d'agriculteurs des stratégies de diversification susceptibles d'apporter de nouvelles sources de revenus...
Géo-Centre-Ouest, Poitiers

hal-01405862
https://hal.univ-antilles.fr/hal-01405862
https://hal.univ-antilles.fr/hal-01405862/document
https://hal.univ-antilles.fr/hal-01405862/file/1997%20L%27agrotourisme%20en%20Poitou-Charentes.pdf

Éditeur(s) : HAL CCSD
Résumé : International audience
We consider in this paper a cascade system of two parabolic equations, governed by a quasi-linear nonlocal operator. We study the null controllability of this problem with a control subject to constraints. We begin by proving the existence of a unique control of minimal norm for the linear problem. We combine these results with a fixed-point theorem to conclude.
ECC15
Linz, Austria

hal-01679115
https://hal.archives-ouvertes.fr/hal-01679115
DOI : 10.1109/ECC.2015.7330608

Éditeur(s) : HAL CCSD
Résumé : International audience
In this paper, we prove a new composition theorem for asymptotically antiperiodic and weighted pseudo antiperiodic functions. We also give some sufficient conditions to ensure invertibility of convolution operators in the space of antiperiodic functions. Then we prove the existence and uniqueness of asymptotically antiperiodic mild solutions to some fractional functional integro-differential equations in a Banach space using the Banach's fixed point theorem.
African Diaspora Journal of Mathematics

hal-01678067
https://hal.archives-ouvertes.fr/hal-01678067

Éditeur(s) : HAL CCSD
Résumé : International audience
Un festival, lorsqu'il atteint une certaine ampleur devient un facteur important du développement local. Il impulse une dynamique nouvelle dans l'espace où il se déroule, entraînant de nombreuses conséquences tant sociales qu'économiques. Il ne laisse personne indifférent. On le vit, on le subit, on y participe. Toute la société est concernée par l'événement.Le festival de Confolens a acquis au fil des années une grande notoriété internationale même s'il se déroule dans une région rurale assez enclavée. Le Confolentais est une région très peu industrialisée qui souffre de déprise agricole. Le dépeuplement s'inscrit davantage dans le paysage à chaque recensement...
Géo-Centre-Ouest, Poitiers

hal-01405810
https://hal.univ-antilles.fr/hal-01405810
https://hal.univ-antilles.fr/hal-01405810/document
https://hal.univ-antilles.fr/hal-01405810/file/1994%20le%20festival%20de%20folklore%20de%20Confolens.pdf

Éditeur(s) : HAL CCSD Seminario Matematico
Résumé : International audience
An original method for the construction of algebras of generalized functions isgiven, which covers both Colombeau simplified algebras and Rosinger algebras cases, themain used such algebras. Examples are given showing how this method works for the mostknown algebras in this area.
ISSN: 0373-1243

hal-01678082
https://hal.archives-ouvertes.fr/hal-01678082

Éditeur(s) : HAL CCSD BOKU - University of Natural Resources and Applied Life Sciences
Résumé : International audience
Our paper is based on the first results of a twofold interdisciplinary research project financed by the French Ministry of the Environment (DIVA2 programme) which purpose was to analyse the emergence of biodiversity conservation as a new goal set to geographical indications and to study its effects on the strategies of the various stakeholders, and their impacts on the farming practices and the...
Building sustainable rural futures: the added value of systems approaches in times of change and uncertainty. 9th European IFSA Symposium, Vienna, Austria, 4-7 July 2010.
Vienna, Austria

hal-00979640
https://hal-agroparistech.archives-ouvertes.fr/hal-00979640

Éditeur(s) : HAL CCSD
Résumé : International audience
Communications on applied nonlinear analysis

hal-00778176
https://hal.univ-antilles.fr/hal-00778176

Éditeur(s) : HAL CCSD
Résumé : International audience
Biodiversité et Gestion des territoires
Schoelcher, Martinique

hal-01634304
https://hal.archives-ouvertes.fr/hal-01634304

Éditeur(s) : HAL CCSD
Résumé : absent
50. colloque de l'ASRDLF
Mons, Belgium

hal-01019548
https://hal.archives-ouvertes.fr/hal-01019548

Éditeur(s) : HAL CCSD Université des Antilles
Résumé : International audience
Ecotourism provides an original conceptual framework that enables approaches to development that are better able to provide a more equitable distribution of income, as well as better organized and thought through initiatives which are more likely to promote a holistic sustainable local development. With somewhat less negative impact than normal tourism, considerably less that mass tourism, ecotourism can encompass nature tourism, cultural tourism, scientific exploration, and even outdoor sports... A definition of ecotourism should take into account the following six points: 1/ nature and culture, 2/ the welfare of the host community, tourists acting responsibly, 3/ participation by the local community, 5 / sustainability , 6/ promotion of cultural exchanges.
L’écotourisme ouvre un cadre conceptuel original qui permet d’envisager des démarches renouvelées de développement à partir des revenus issus de consommations touristiques mieux réfléchies et organisées, susceptibles de soutenir des initiatives de développement local s’inscrivant dans un projet global de développement durable. Variante douce du tourisme, loin du tourisme de masse, le champ de l’écotourisme s’étend aux confins du tourisme de nature, du tourisme culturel et des pratiques scientifiques et sportives de plein air. Une définition de l’écotourisme peut être proposée à partir des six points suivants : 1/ nature et culture, 2/ le bien-être des sociétés hôtes, 3/ des touristes responsables, 4/ la participation des sociétés hôtes, 5/ la durabilité, 6/ l’art de la rencontre.
ISSN: 1779-0980

hal-01624739
https://hal.archives-ouvertes.fr/hal-01624739
DOI : 10.4000/etudescaribeennes.414

Éditeur(s) : HAL CCSD Hindawi Publishing Corporation
Résumé : International audience
We use the kinetic approach of Perthame and Tadmor (1991) to calculate the error estimates for general scalar conservation laws governing problems in gas dynamics. The Kruzkov and Kuznetsov techniques are generalized to this method, and an error bound of order the squareroot of the mean free path is obtained.
ISSN: 0161-1712

hal-00715494
https://hal.univ-antilles.fr/hal-00715494
https://hal.univ-antilles.fr/hal-00715494/document
https://hal.univ-antilles.fr/hal-00715494/file/IJMMS_Omrane_HAL.pdf
DOI : 10.1155/IJMMS/2006/41510

Éditeur(s) : HAL CCSD
Résumé : International audience
Suriname is the smallest country in South America. However, in regional academic literature, it has been repeatedly considered one of the largest Caribbean territories for many years (Best 1967; Granger 2008). This territory is generally included in the socio-historical group of the three Guianas (Lézy 2000), or the bio-geographical group of the Guiana Plateau. Additionally, Suriname is frequently considered part of the insular Caribbean (Girvan 2005). The latter consideration implies a geographical paradox that is twofold. In fact, Suriname, French Guiana and Guyana are not directly bordered by the Caribbean Sea. Moreover, like Belize, which is also commonly included in the Caribbean island group, Suriname is not an island in the strict sense of the word, i.e. land surrounded by water, based on the restricted definition of the term. Nevertheless, the Caribbean cannot be defined today on the sole basis of a deterministic relationship with the sea bearing the same name. Further, research conducted on insularity increasingly demonstrates the limitations of the physical nature of the island, in favour of feelings of belonging, alienation, etc. (Taglioni 2003).
Caribbean Atlas

hal-00875566
https://hal.archives-ouvertes.fr/hal-00875566

Éditeur(s) : HAL CCSD
Résumé : International audience
The tourist activity, by its international character and as a constantly expanding economic sector emerges as a means of obtaining international recognition being meanwhile an important economic sector of the national economy. In Romania case it appears as an "air breath" for an economic system in crisis and an extremely rolonged period of transition. By the dynamics, human and financial flow which it triggers, through the multiple forms which it covers, through the ability by which some thresholds (i.e. ideological or political) can impose an evolving path, tourism represents an economic sector for the countries in transition which can re-lauch or re-direct the subsequent evolution of a national economy. In ordeur to reach to these parameters a re-definition and a re-discovery of the real tourist potential is required in Romania case.
Condtions of the Foreign Tourism Developement in Central and Eastern Europe. Problems of the Development of Ecotourism with Special Emphasis on Mountain Areas

ISBN : 83-87196-28-2
hal-01412866
https://hal.univ-antilles.fr/hal-01412866
https://hal.univ-antilles.fr/hal-01412866/document
https://hal.univ-antilles.fr/hal-01412866/file/2002%20Alternatives%20for%20the%20development%20of%20tourism%20in%20Romania.pdf

Éditeur(s) : HAL CCSD University of Waterloo
Résumé : International audience
We study several families of solutions to equations of the form (n) = An + B(n), where B is a function that may depend on properties of n.
ISSN: 1530-7638

hal-00761663
https://hal.univ-antilles.fr/hal-00761663
https://hal.univ-antilles.fr/hal-00761663/document
https://hal.univ-antilles.fr/hal-00761663/file/hasler21.pdf

Éditeur(s) : HAL CCSD
Résumé : International audience
In this paper, we introduce and consider a new class of variational inequalities involving two operators, which is called the general nonconvex quasi variational inequality. Several special cases are discussed. We use the projection technique to establish the equivalence between the general noncon vex quasi variational inequalities and the xed point problems. This alternative equivalent formulation is used to study the existence of a solution of the general nonconvex quasi variational inequalities. Using these equivalent for-mulations, we suggest and analyze a wide class of new extragradient methods for solving the general nonconvex quasi variational inequalities. Convergence criteria of these new iterative methods is considered under some suitable conditions.
Bulletin of Mathematical Analysis and Applications

hal-00783908
https://hal.univ-antilles.fr/hal-00783908

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
A data stream is a potentially uninterrupted flow of data. Mining this flow makes it necessary to cope with uncertainty, as only a part of the stream can be stored. In this paper, we evaluate a statistical technique which biases the estimation of the support of patterns, so as to maximize either the precision or the recall, as chosen by the user, and limit the degradation of the other criterion. Theoretical results show that the technique is not far from the optimum, from the statistical standpoint. Experiments performed tend to demonstrate its potential, as it remains robust even under significant distribution drifts.
ISSN: 0031-3203

lirmm-00365474
https://hal-lirmm.ccsd.cnrs.fr/lirmm-00365474