Recursos de colección

Universidad Nacional de La Plata (75.867 recursos)

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vol. 03, no. 01

Mostrando recursos 1 - 11 de 11

  1. Reducing Branch Misprediction Penalty through Confidence Estimation

    Aragón, Juan Luis
    The goal of this Thesis is reducing the global penalty associated to branch mispredictions, in terms of both performance degradation and energy consumption, through the use of confidence estimation. The reduction of this global penalty has been achieved, firstly, by increasing the accuracy of branch predictors, next, by reducing the time necessary to restore the processor from a mispredicted branch, and finally, by reducing the energy consumption due to the execution of incorrect instructions. All these proposals rely on the use of confidence estimation, a mechanism that assesses the quality of branch predictions by means of estimating the probability of...

  2. Digital Signal Processing, A Computer Based Approach. 2nd Edition

    Jaquenod, Guillermo A.
    Designed for a one-year course on DSP, the book Digital Signal Processing, A Computer Based Approach aims to give seniors or first-year graduate students strong foundations of the analysis and design of discrete-time systems for digital signal processing. Anyway, is also suitable for self-study by practicing engineers or scientists. Numerous practical examples using real life signal processing problems are given, emphasizing the mastery of concepts and tools rather than rigor of mathematics.

  3. Modern database management

    Bertone, Rodolfo Alfredo
    This book provides an excellent foundation for the principles of database and data management. It explains some of the more difficult concepts fairly well. The book is meant for an introductory course in database management which is usually required as part of a computer science departments.

  4. Application of symmetric orthogonal multiwavelets and prefilter technique for image compression

    Chen, Jiazhong; Zhou, Jingli; Yu, Shengsheng; Xiao, Qian; Xu, Jun
    Multiwavelets are new addition to the body of wavelet theory. There are many types of symmetric multiwavelets such as Geronimo-Hardin-Massopust (GHM) and Chui-Lian (CL) multiwavelets. However, the matrix filter generating the GHM system multiwavelets does not satisfy the symmetric property. For this reason, this paper presents a new method to construct the symmetric orthogonal matrix filter, which leads to the symmetric orthogonal multiwavelets (SOM). Moreover, we analyze the prefilter technique, corresponding to the symmetric orthogonal matrix filter, to get a good combining frequency response. To prove the good property of SOM in image compression application, we compared the compression effect...

  5. Boosting classifiers for weed seeds identification

    Granitto, Pablo Miguel; Garralda, Pablo A.; Verdes, Pablo Fabián; Ceccatto, Hermenegildo Alejandro
    The identification and classification of seeds are of major technical and economical importance in the agricultural industry. To automate these activities, like in ocular inspection one should consider seed size, shape, color and texture, which can be obtained from seed images. In this work we complement previous studies on the discriminating power of these characteristics for the unique identification of seeds of 57 weed species. In particular, we discuss the possibility of improving the naïve Bayes and artificial neural network classifiers previously developed in order to avoid the use of color features as classification parameters. Morphological and textural seed characteristics can...

  6. Design composition

    Sametinger, Johannes R.; Keller, Rudolf K.
    Object-oriented software development has proven effective for systems development, but the creation of reusable and changeable software architectures is still a challenging task. Design patterns capture the expertise for reusable design solutions, but there is no methodical approach to providing conceptual design building blocks in tangible and composable form. Design components have been suggested to address this problem. We suggest design composition with design components, role models and role constraints. We claim that design expertise in composable form with explicit design constraints and with explicit documentation has many advantages. It provides alternative views on software systems at a high level...

  7. Conceptual patterns for water resources information systems

    Iturraspe, Rodolfo Javier; Urciuolo, Adriana Beatriz
    Water Resources Information Systems (WRIS) present different types of problems during the data storage and analysis phases, related with the complex nature of the environmental data spacio-temporal phenomena. There are many questions to deal with, such as geographic representation of environmental variables, large time- series management,measurements and observations related with different hydrologic phenomena recording and the integration of simulations models to information systems. Conceptual models allow us to understand and simplify problems in a specific domain. These problems can be expressed through analysis patterns, which reflect conceptual structures of an application domain speeding up the development of the abstract analysis...

  8. The use of agent to incorporate network awareness into dynamic proxy framework: an overview

    Choong, KhongNeng; Ali, Borhanuddin M.; Prakash, Veeraraghavan; Tee, Elok R.
    It has been observed that research in mobile agent focused on the development of platforms and on the application of the concept. Network awareness is one of the applications of mobile agent, concerning of how agent determine and make the most efficient use of network resources. This paper describes the role and functionality of mobile agent in the context of a dynamic proxy framework named the Chek Proxy Framework (CPF). Attention is paid on setting out a multi-agent-based framework to enrich CPF with a Network Awareness Module (NAM), which is implemented in an agent named ObjectBasket (OB). NAM is a...

  9. Boundary extraction through gradient-based evolutionary algorithm

    Katz, Román; Delrieux, Claudio
    Boundary extraction is an important procedure associated with recognition and interpretation tasks in digital image processing and computer vision. Most of the segmentation techniques are based on the detection of the local gradient, and then their application in noisy images is unstable and unreliable. Therefore global mechanisms are required, so that they can avoid falling into spurious solutions due to the noise. In this paper we present a gradient-based evolutionary algorithm as a heuristic mechanism to achieve boundary extraction in noisy digital images. Evolutionary algorithms explore the combinatory space of possible solutions by means of a process of selection of...

  10. Evolutifon of decision support system architectures: applications to land planning and management in Cuba

    Segrera, Saddys; Ponce-Hernandez, Raúl; Arcia, J.
    The main objective of this paper centers on reviewing the evolution of Decision Support System´s (DSS) architectures, particularly as they apply to natural resources. Today it is difficult to conceive the existence of a rural planning automated system that doesn't include spatial analysis functionality and that does not consider the integrated use of different analytical modules. This wider range of functions allow for solving problems from resource and environmental management. Geographical Information Systems (GIS), automated land evaluation, multi-criteria participatory analysis in decision making are but the most salient technologies in a DSS. DSS have evolved; their architecture, mode of implementation,...

  11. ADESSO

    Machado, Rubens C.; Saude, Andre V.; Lotufo, Roberto
    This paper presents the Adesso, a computational environment for the development of scientific software. The Adesso environment leverages the reusable software component programming model to support the development and integration of components to several scientific programming platforms. The Adesso system is based on an XML component database and a set of XML document transformation tools for the automatic generation of component code, documentation and packaging. An authoring tool, built with the help of the Adesso transformation system itself, is provided to assist the user in the creation of components. The Adesso system has been used for the development of several...

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