Voici les éléments 1-20 de 733

  • Flexible Indexing of Repetitive Collections 

    Belazzougui, Djamal; Cunial, Fabio; Gagie, Travis; Prezza, Nicola; Raffinot, Mathieu
    In : (Springer, Turku, Finlande., 2017-06-07)
    Highly repetitive strings are increasingly being amassed by genome sequencing experiments, and by versioned archives of source code and webpages. We describe practical data structures that support count- ing and locating all the exact occurrences of a pattern in a repetitive text, by combining the run-length encoded ...
  • Representing the Suffix Tree with the CDAWG 

    Belazzougui, Djamal; Cunial, Fabio
    In : (Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik, Varsovie, 2017-07-04)
    Given a string T, it is known that its suffix tree can be represented using the compact directed acyclic word graph (CDAWG) with e_T arcs, taking overall O(e_T+e_REV(T)) words of space, where REV(T) is the reverse of T, and supporting some key operations in time between O(1) and O(log(log(n))) in the worst case. This ...
  • New Technique to Deal With Verbose Queries in Social Book Search 

    Chaa, Messaoud; Nouali, Omar; Bellot, Patrice
    In : Rapports de recherche internes, (CERIST, Alger, 2017)
    Verbose query reduction and query term weighting are automatic techniques to deal with verbose queries.
  • New GPU-based Swarm Intelligence Approach For Reducing Big Association Rules Space 

    Djenouri, Youcef; Bendjoudi, Ahcène; Djenouri, Djamel; Belhadi, Asma; Nouali-Taboudjemat, Nadia
    In : Rapports de recherche internes, (CERIST, Alger, 2017-06-14)
    This paper deals with exploration and mining of association rules in big data, with the big challenge of increasing computation time. We propose a new approach based on meta-rules discovery that gives to the user the summary of the rules’ space through a meta-rules representation. This allows the user to decide about ...
  • An Approach to Improve Business Process Models Reuse Using LinkedIn Social Network 

    Khider, Hadjer; benna, Amel; Meziane, Abdelkrim; Hammoudi, Slimane
    In : (Springer International Publishing AG 2017, Editors: Rocha, Á., Correia, A.M., Adeli, H., Reis, L.P., Costanzo, S. (Eds.), Porto Santo Island, Portugal, 2017-04)
    Business process (BP) modeling is an important stage in Business Process Management (BPM) lifecycle. However, modeling BP from scratch is fallible task, complex, time-consuming and error prone task. One of the promising solutions to these issues is the reuse of BP models. BP reusability during the BP modeling stage can ...
  • A framework for space-efficient read clustering in metagenomic samples 

    Alanko, Jarno; Cunial, Fabio; Belazzougui, Djamal; Mäkinen, Veli
    In : (BioMed Central, 2017-03-14)
    Background: A metagenomic sample is a set of DNA fragments, randomly extracted from multiple cells in an environment, belonging to distinct, often unknown species. Unsupervised metagenomic clustering aims at partitioning a metagenomic sample into sets that approximate taxonomic units, without using reference genomes. ...
  • Binarization of document images with various object sizes 

    Hadjadj, Zineb; Meziane, Abdelkrim
    In : (IEEE, Nancy, France, 2017-04)
    There are a lot of document image binarization techniques that try to differentiate between foreground and background but many of them fail to correctly detect all the text pixels because of degradations. In this paper, a new binarization method for document images is presented. The proposed method is based on the most ...
  • Proposition d'un nouveau modèle de recherche sociale 

    Bessai Mechmache, Fatma Zohra; Hammouche, Karima; Alimazighi, Zaia
    In : Rapports de recherche internes, (CERIST, Alger, 2017-04-20)
    Dans ce rapport nous proposons un nouveau modèle de recherche d’information sociale. Ce modèle enrichit la structure du réseau en introduisant l’utilisateur comme une entité du réseau social. L’importance d’une entité dépendra de la structure du réseau et de la proximité sémantique entre les différentes entités composant ...
  • Intégration de l’utilisateur dans un modèle de recherche sociale 

    Bessai Mechmache, Fatma Zohra; Hammouche, Karima; Alimazighi, Zaia
    In : (Al Hoceima, Maroc, 2017-05)
    Dans cet article nous proposons un nouveau modèle de recherche d’information sociale basé sur un ordonnancement conjoint des documents, des auteurs et des utilisateurs d’un réseau bibliographique dans un réseau hétérogène. Ce modèle enrichit la structure du réseau en introduisant l’utilisateur comme une entité du réseau ...
  • Les Manuscrits Arabes Anciens En Ligne : Pratiques et Recommandations 

    Habbak, Noureddine; Meziane, Abdelkrim
    In : Rapports de recherche internes, (CERIST, Alger, 2017-04-10)
    Les technologies de l’information ont révolutionné la bibliothèque classique. Aujourd’hui, de nombreuses bibliothèques passent au monde numérique. L’accès aux documents qui ont tendance à se détériorer rapidement et qui sont très demandés tels que les manuscrits arabes anciens, devient de plus en plus simple, ce qui ...
  • Les Manuscrits Arabes Anciens En Ligne : Pratiques et Recommandations 

    Habbak, Noureddine; Meziane, Abdelkrim
    In : (Al-Hoceima (Maroc), 2017-05-11)
    Les technologies de l’information ont révolutionné la bibliothèque classique. Aujourd’hui, de nombreuses bibliothèques passent au monde numérique. L’accès aux documents qui ont tendance à se détériorer rapidement et qui sont très demandés tels que les manuscrits arabes anciens devient de plus en plus simple, ce qui assure ...
  • Fast and smart object proposals for object detection 

    Amrane, Abdesalam; Meziane, Abdelkrim; Boulekrinat, Houda; Atik, Ali
    In : Rapports de recherche internes, (CERIST, Alger, 2017-05-11)
    Object localization plays an important role in object detection and classification. In the last years, several methods have shifted from sliding windows techniques to object proposals techniques. The latter produces a small set of windows submitted to an object classifier to reduce the computational time. In this paper, ...
  • REFIACC: Reliable, efficient, fair and interference-aware congestion control protocol for wireless sensor networks 

    Kafi, Mohamed Amine; Ben-Othman, Jalel; Ouadjaout, Abdelraouf; Bagaa, Miloud
    In : (Elsevier, 2017)
    The recent wireless sensor network applications are resource greedy in terms of throughput and net- work reliability. However, the wireless shared medium leads to links interferences in addition to wireless losses due to the harsh environment. The effect of these two points translates on differences in links bandwidth ...
  • Accelerated Search over Encrypted Cloud Data 

    Boucenna, Fateh; Nouali, Omar; Dabah, Adel; Kechid, Samir
    In : (IEEE, Jeju, Corée du sud, 2017-02-13)
    Companies and other organizations such as hospitals seek more and more to enjoy the benefits of cloud computingin terms of storage space and computing power. However, outsourced data must be encrypted in order to be protected againstpossible attacks. Therefore, traditional information retrieval systems (IRS) are no longer ...
  • Manuel de procédures de dépôt de brevet en Algérie 

    LAKHLEF, Saida
    In : Manuels d'utilisation, (CERIST, Alger, 2016-11)
    L’objectif du présent manuel est de faire connaitre, les principes de base liés au brevet d’invention, s’adressant aux chercheurs et étudiants intéressés par le brevet, en tenant compte de la démarche à suivre pour déposer une demande de brevet en Algérie.
  • Efficient On-Demand Multi-Node Charging Techniques for Wireless Sensor Networks 

    Khelladi, Lyes; Djenouri, Djamel; Rossi, Michele; Badache, Nadjib
    In : (Elsevier, 2016-10-01)
    This paper deals with wireless charging in sensor networks and explores efficient policies to perform simultaneous multi-node power transfer through a mobile charger (MC).The proposed solution, called On-demand Multi-node Charging (OMC), features an original threshold-based tour launching (TTL) strategy, using request ...
  • Binarization of Document Images with Various Object Sizes 

    Hadjadj, Zineb; Meziane, Abdelkrim
    In : Rapports de recherche internes, (CERIST, Alger, 2017-02-01)
    There are a lot of document image binarization techniques that try to differentiate between foreground and background but many of them fail to correctly detect all the text pixels because of degradations. In this paper, a new binarization method for document images is presented. The proposed method is based on the most ...
  • Ontological Interaction Modeling and Semantic Rule-Based Reasoning for User Interface Adaptation 

    Lebib, Fatma-Zohra; Mellah, Hakima; Mohand Oussaid, Linda
    In : Rapports de recherche internes, (CERIST, Alger, 2016)
    Disabled users conducting their interactive tasks on their devices address challenges such as user interface adaptation. The paper provides a valuable knowledge for supporting adaptive user interfaces. In this work an interactive application development, in handicrafts’ domain is considered, with the aim to build ontology ...
  • Selection of Information Sources using a Genetic Algorithm 

    Lebib, Fatma Zohra; Drias, Habiba; Mellah, Hakima
    In : Rapports de recherche internes, (CERIST, Alger, 2017-01-02)
    We address the problem of information sources selection in a context of a large number of distributed sources. We formulate the sources selection problem as a combinatorial optimization problem in order to yield the best set of relevant information sources for a given query. We define a solution as a combination of ...
  • Toward an Approach to Improve Business Process Models Reuse Based on Linkedin Social Network 

    Khider, Hadjer; Benna, Amel; Meziane, Abdelkrim; Hammoudi, Slimane
    In : Rapports de recherche internes, (CERIST, Alger, 2017-01-10)
    Business process (BP) modeling is an important stage in BPM lifecycle. However, modeling BP from scratch is fallible task, complex, time-consuming and error prone task. One of the promising solutions to these issues is the reuse of BP models. BP reusability during the BP modeling stage can be very useful since it reduces ...