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Unversidad Nacional de La Plata (69)

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Aproximadamente 69 registro(s) hasta el momento: (knowledge)

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Recurso libre

Toward integration of knowledge based systems and knowledge discovery systems
Rancan, Claudio - Pesado, Patricia - García-Martínez, Ramón

Formato:	Articulo, Articulo
Enlaces:	This paper presents a proposal for an architecture that integrates knowledge discovery systems (automatic acquisition) and knowledge based systems (experts systems). This work formulates considerations over the viability of the implementation of this architecture according to the advance of the…
Fecha:	2008-05-21
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Tableau calculi for description logics revision
Moguillansky, Martín O. - Falappa, Marcelo Alejandro

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Focusing on the Ontology Change problem, we consider an environment where Description Logics (DLs) are the logical formalization to express knowledge bases, and the integration of distributed ontologies is developed under new extensions and modifications of the Belief Revision theories…
Fecha:	2012-08-31
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Computing support for problem solving in virtual communities of practice
Casalini, María Clara - Estevez, Elsa Clara - Janowski, Thomas

Formato:	Articulo, Articulo
Enlaces:	The paper presents a formal model for a knowledge repository shared by members of a Virtual Community of Practice (VCPs), describes how the repository can be used to underpin collaborative problem solving, and how to build computer support for such…
Fecha:	2008-05-21
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Webexpert – tool for knowledge acquisition by web
Fernandes, Anita Ma. da Rocha - Nascimento, Raphael Luiz

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Knowledge acquisition for systems based on knowledge can be called knowledge engineering, according to Feigenbaum (1980) who used the term to describe the reduction of a wide context of knowledge for a set of facts and rules. The term Knowledge…
Fecha:	2012-10-09
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Agent programming using defeasible argumentation for knowledgerepresentation and reasoning
Gottifredi, Sebastián - Simari, Guillermo Ricardo - García, Alejandro Javier

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In this work two declarative approaches based on the BDI theory are studied, an agent programming language 3APL and an agent architecture that uses defeasible argumentation for knowledge representation and reasoning. Based on that study and considering that in 3APL…
Fecha:	2012-11-01
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Developing a Repository of Knowledge for virtual communities with semantic web technologies
Casalini, María Clara - Estevez, Elsa Clara - Fillottrani, Pablo Rubén

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The appearance and continuous growth of virtual communities on the web imposes the challenge of coping with the large amount of information and knowledge these communities produce. The Semantic Web with its set of standards and technologies provides the basic…
Fecha:	2012-09-28
Recurso:	Unversidad Nacional de La Plata

Recurso libre

A data mining approach to computational taxonomy
Perichinsky, Gregorio - García Martínez, Ramón

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	This study investigates an approach of knowledge discovery and data mining in insufficient databases. An application of Computational Taxonomy analysis demonstrates that the approach is effective in such a data mining process. The approach is characterized by the use ot…
Fecha:	2012-10-10
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Prior knowledge in evolutionary fuzzy recurrent controllers design
Apolloni, Javier - Kavka, Carlos - Roggero, Patricia

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	A fuzzy controller is usually designed by formulating the knowledge of a human expert into a set of linguistic variables and fuzzy rules. As it is well known, the use of prior knowledge can dramatically improve the performance and quality…
Fecha:	2012-09-19
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Improving web personalization re-engineering processes using cognitive knowledge management
Martín, Adriana - Cechich, Alejandra

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	A re-design process implies dealing with complex interactions between stakeholders, especially if we are talking about a personalization re-engineered process, which can be applied to an existing web application. In this context, knowledge becomes a main factor of influence, but…
Fecha:	2012-09-20
Recurso:	Unversidad Nacional de La Plata

Recurso libre

10.

A model for concepts extraction and context identification in knowledge based systems
Bortolon, Andre - Hoeschl, Hugo Cesar - Bueno, Tânia C. D. - Coelho, Christianne C. S. R.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Information Retrieval Systems normally deal with keywordbased technologies. Although those systems reach satisfactory results, they aren’t able to answer more complex queries done by users, especially those directly in natural language. To do that, there are the KnowledgeBased Systems, which…
Fecha:	2012-11-15
Recurso:	Unversidad Nacional de La Plata

Recurso libre

11.

On the implementation of the belief change operators
Falappa, Marcelo Alejandro - Fermé, Eduardo L.

Formato:	Articulo, Articulo
Enlaces:	In this article we will introduce certain considerations that must be taken into account while implementing the change operations of the belief change theory. The abstract models of bellief change make no considerations in respecto to the internal structures of…
Fecha:	2004-05-07
Recurso:	Unversidad Nacional de La Plata

Recurso libre

12.

Knowledge extraction in large databases using adaptive strategies
Hasperué, Waldo

Formato:	Articulo, Revision
Enlaces:	The general objective of this thesis is the development of an adaptive technique for extracting knowledge in large databases. Nowadays, technology allows storing huge volumes of information. For this reason, the availability of techniques that allow, as a first stage,…
Fecha:	2013-03-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

13.

A semantic web model for the situational awareness of indigenous knowledge in healt
Bassey, Patience - Ntekop, Mfon

Formato:	Articulo, Articulo
Enlaces:	Most unsupervised indigenous knowledge (IK) are known to be very useful in combating critical health issues as well as being dangerous if the administration is abused. Despite the fact that these locally prepared herbal medicine are not encouraged to be…
Fecha:	2013-10-03
Recurso:	Unversidad Nacional de La Plata

Recurso libre

14.

A first approach to abductive defeasible logic programming: formalization and properties
Gómez Lucero, Mauro J. - García, Alejandro Javier - Chesñevar, Carlos Iván - Simari, Guillermo Ricardo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	This article presents the confluence of two general ideas: Defeasible Logic Programming (DeLP, an argumentation based formalism for representing knowledge and reasoning) and Abduction in logic. In first place, we introduce a framework that formally states the problem of doing…
Fecha:	2012-11-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

15.

Revisions of orders in dynamic systems
Falappa, Marcelo Alejandro - Simari, Patricio D.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Current reasoning systems attempt to model an agent's knowledge and interaction with its environment in a symbolic manner. This environment, its world is generally dynamic and changing due to natural evolution or the actions of other agents that are a…
Fecha:	2012-09-27
Recurso:	Unversidad Nacional de La Plata

Recurso libre

16.

Ontologies for the semantic web
Vallés, María Clara - Fillottrani, Pablo Rubén

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The Semantic Web attempts to reach a state in the future where everything on the Web will no longer be only machine-readable, but also machine-understandable. An ontology is an explicit specification of a conceptualization. A conceptualization is an abstract, simplified…
Fecha:	2012-09-07
Recurso:	Unversidad Nacional de La Plata

Recurso libre

17.

Inserting problem-specific knowledge in multirecombined evolutionary algorithms
Pandolfi, Daniel - San Pedro, María Eugenia de - Villagra, Andrea - Vilanova, Gabriela - Gallard, Raúl Hector

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In the restricted single-machine common due date problem the goal is to find a schedule for the n jobs which jointly minimizes the sum of earliness and tardiness penalties, while for the weighted tardiness problem the goal is to find…
Fecha:	2012-10-09
Recurso:	Unversidad Nacional de La Plata

Recurso libre

18.

Towards a comparison criteria for CDeLP
Cobo, María Laura - Simari, Guillermo Ricardo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The development of systems with the ability to reason about change notion and actions has been of great importance for the artificial intelligence community. The definition and implementation of systems capable of managing defeasible, incomplete, unreliable, or uncertain information has…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

19.

Knowledge dynamics in a khepera robots’ application
Tamargo, Luciano H. - García, Alejandro Javier - Falappa, Marcelo Alejandro

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The theory change area have defined several operators trying to model the dynamic of knowledge. The goal of this work is to introduce a preprocessor of perceptions that could be part of an agent. The purpose of the preprocessor is…
Fecha:	2012-10-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

20.

Model contractions on description logics
Falappa, Marcelo Alejandro - Moguillansky, Martín O.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	When using tableaux algorithms to reason about Description Logics (DLs), new information is inferred from the models considered while trying to achieve knowledge satisfiability. By focusing the ontology change problem, we consider an environment where DLs are the logical formalization…
Fecha:	2012-11-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

21.

Integrating federated information sources through the use of ontologies
Buccella, Agustina - Cechich, Alejandra - Penabad, Miguel R. - Rodriguez, Francisco J. - Brisaboa, Nieves R.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Ontologies serve as a mean to establish a conceptually concise basis for communicating knowledge for many purposes. Within the information integration area, ontologies are useful to solve heterogeneity problems. They provide a set of knowledge terms, including the vocabulary, the…
Fecha:	2012-09-20
Recurso:	Unversidad Nacional de La Plata

Recurso libre

22.

Belief revision and relevance
Falappa, Marcelo Alejandro - Maguitman, Ana Gabriela

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The aim of this work is to relate two apparently independent concepts as belief revision and relevance. We propose a formal characterization for the notion of (ir)relevance by means of a set of postulates. Then we define (ir)relevance using change…
Fecha:	2012-10-11
Recurso:	Unversidad Nacional de La Plata

Recurso libre

23.

Reasoning module interface design considerations
Stankevicius, Alejandro G.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	DLP is a basic java-based IDE specifically conceived for DeLP, that allows to compile DeLP programs and queries into JAM opcodes, execute those opcodes, and even witness the actual step by step construction of the dialectical tree that is built…
Fecha:	2012-09-19
Recurso:	Unversidad Nacional de La Plata

Recurso libre

24.

A knowledge representation semantic network for a natural language syntactic analyzer based on the UML
Silva, Alberto Tavares da - Carvalho, Luis Alfredo V.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The need for improving software processes approximated the software engineering and artificial intelligence areas. Artificial intelligence techniques have been used as a support to software development processes, particularly through intelligent assistants that offer a knowledge-based support to software process’ activities.…
Fecha:	2012-11-15
Recurso:	Unversidad Nacional de La Plata

Recurso libre

25.

Tracing MPI binaries for knowledge discovery
Grosclaude, Eduardo - Zanellato, Claudio - Zurita, Rafael - Castillo, Rodolfo del

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Our research project intends to build knowledge about HPC problems to be able to help local researchers. In the general case, researchers who consult us do not own the sources to the parallel programs they run. In order to advise…
Fecha:	2012-07-16
Recurso:	Unversidad Nacional de La Plata

Recurso libre

26.

Software projects effort estimation using “use case points” method in the context of Project Management Body of Knowledge
Montejano, Germán Antonio - Uzal, Roberto - Riesco, Daniel Eduardo - Debnath, Narayan C.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	As a contribution to consider software projects to be risk investments, it is important the full standardization of either the planning methodology (as a subset of project management methodology) and the effort estimation method. We think there is important and…
Fecha:	2012-10-05
Recurso:	Unversidad Nacional de La Plata

Recurso libre

27.

Construction of a taxonomy for requirements engineering commercial-off-the-shelf components
Ayala, Claudia - Botella, Pere - Franch, Xavier

Formato:	Articulo, Articulo
Enlaces:	This article presents a procedure for constructing a taxonomy of COTS products in the field of Requirements Engineering (RE). The taxonomy and the obtained information reach transcendental benefits to the selection of systems and tools that aid to RE-related actors…
Fecha:	2008-05-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

28.

SeDiCI (Intellectual Creation Diffusion Service)
De Giusti, Marisa Raquel

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The Intellectual Creation Diffusion Service (SeDiCI) of the UNLP was created with the main objective of communicating to the society all the knowledge acquired in different academic fields of our university. This is how we can return all the efforts…
Fecha:	2007-11-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

29.

Intel Xeon Phi Coprocessor High Performance Programming
More, Andres

Formato:	Articulo, Revision
Enlaces:	James Reinders (Chief Evangelist of Intel® Software at Intel) and Jim Jeffers (Principal Engineer at Intel) have gathered in this book the working knowledge of the people involved to prototype and productize the Intel® Xeon Phi coprocessor. This include…
Fecha:	2013-10-03
Recurso:	Unversidad Nacional de La Plata

Recurso libre

30.

Embedding defeasible argumentation in the semantic web: an ontology-based approach
Gómez, Sergio Alejandro - Chesñevar, Carlos Iván - Simari, Guillermo Ricardo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The SemanticWeb is a project intended to create a universal medium for information exchange by giving semantics to the content of documents on the Web by means of ontology definitions. Ontologies intended for knowledge representation in intelligent agents rely on…
Fecha:	2012-09-19
Recurso:	Unversidad Nacional de La Plata

Recurso libre

31.

Characterizing defeat in observation-based defeasible logic programming
Capobianco, Marcela - Chesñevar, Carlos Iván

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In this work we analyze the problem of incorporating specificity to characterize defeat in a particular argumentative framework, called observation based defeasible logic programming (ODeLP) [1]. Eficiency is an important issues in ODeLP, since this framework has been de ned…
Fecha:	2012-09-20
Recurso:	Unversidad Nacional de La Plata

Recurso libre

32.

Non prioritized reasoning in intelligent agents
Falappa, Marcelo Alejandro - Simari, Guillermo Ricardo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The design of intelligent agents is greatly influenced by the many different models that exist to represent knowledge. It is essential that such agents have computationally adequate mechanisms to manage its knowledge, which more often than not is incomplete and/or…
Fecha:	2012-09-25
Recurso:	Unversidad Nacional de La Plata

Recurso libre

33.

Greedy seeding procedure for GAs solving a strip packing problem
Salto, Carolina - Alba Torres, Enrique - Molina, J.M. - Leguizamón, Guillermo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In this paper, the two-dimensional strip packing problem with 3-stage level patterns is tackled using genetic algorithms (GAs). We evaluate the usefulness of a greedy seeding procedure for creating the initial population, incorporating problem knowledge. This is motivated by the…
Fecha:	2012-11-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

34.

Specifying quality characteristics and attributes for E-Learning sites
Covella, Guillermo Juan - Olsina Santos, Luis Antonio

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Education involves a continuous process of exploration, acquisition, organization, integration and delivery of information and knowledge. In recent years, e-learning sites and applications have exponentially started to grow, being a central phenomenon for the industry and education fields. Key factors…
Fecha:	2012-10-01
Recurso:	Unversidad Nacional de La Plata

Recurso libre

35.

Defeasible decision making in a robotic environment
Ferretti, Edgardo - Errecalde, Marcelo Luis

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Decision making models for autonomous agents are recently receiving increased attention, particularly in the feld of intelligent robots. This work presents a Defeasible Logic Programming approach to decision making in an environment with single and multiple robots. We will show,…
Fecha:	2012-10-25
Recurso:	Unversidad Nacional de La Plata

Recurso libre

36.

Introducing multiple preference criteria in defeasible argumentation
Rotstein, Nicolás D. - Simari, Guillermo Ricardo - García, Alejandro Javier

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In this research line we are exploring the possibility of having multiple preference criteria to compare arguments in in Defeasible Argumentation. In this work we are assuming a goaloriented Argumentative System, to which an application or an agent may seek…
Fecha:	2012-09-19
Recurso:	Unversidad Nacional de La Plata

Recurso libre

37.

Evolution of recurrent fuzzy controllers
Kavka, Carlos - Roggero, Patricia - Apolloni, Javier

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The main advantage of a recurrent architecture is the ability to store information from prior system states. A recurrent fuzzy controller includes hidden fuzzy variables which makes the controller more appropriate to deal with dynamic systems. We are currently investigating…
Fecha:	2012-09-21
Recurso:	Unversidad Nacional de La Plata

Recurso libre

38.

Strengthening intrusion detection techniques through emerging patterns
Grandinetti, Walter M.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In todays world where nearly every company is dependent on the Internet to survive, it is not surprising that the role of intrusion detection has become extremely important within the last decade. Intrusion detection involves determining whether some entity has…
Fecha:	2012-09-21
Recurso:	Unversidad Nacional de La Plata

Recurso libre

39.

Collaboration through deliberative dialogues
Rueda, Sonia Vivian - García, Alejandro Javier - Simari, Guillermo Ricardo

Formato:	Articulo, Articulo
Enlaces:	In a multi-agent system, a group of individ- uals interact in a social context in order to boost their capabilities and enhance global per- formance. Each individual's action repertoire may be reduced, but it's social capability allows it to interact…
Fecha:	2008-09-11
Recurso:	Unversidad Nacional de La Plata

Recurso libre

40.

Computer networks. A top-down approach featuring Internet, second edition, Redes de Computadores – Un enfoque descendente basado en Internet. Segunda edición
López, Ricardo A.

Formato:	Articulo, Revision
Enlaces:	The book is intended to be used in an introductory and intermediate level course on computer networks, both whitin Computer Science and Electric Engineering scopes. One of its characteristics is that the entire research software is presented in Java, but…
Fecha:	2008-10-14
Recurso:	Unversidad Nacional de La Plata

Recurso libre

41.

A cognitive approach to real-time rescheduling using SOAR-RL
Barsce, Juan Cruz - Palombarini, Jorge - Martínez, Ernesto

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Ensuring flexible and efficient manufacturing of customized products in an increasing dynamic and turbulent environment without sacrificing cost effectiveness, product quality and on-time delivery has become a key issue for most industrial enterprises. A promising approach to cope with this…
Fecha:	2013-11-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

42.

Solving constrained optimization using a T-Cell artificial immune system
Aragón, Victoria S. - Esquivel, Susana Cecilia

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In this paper, we present a novel model of an artificial immune system (AIS), based on the process that suffers the T-Cell. The proposed model is used for solving constrained (numerical) optimization problems. The model operates on three populations: Virgins,…
Fecha:	2012-10-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

43.

Parallel defeasible argumentation
García, Alejandro Javier - Simari, Guillermo Ricardo

Formato:	Articulo, Articulo
Enlaces:	Implicitly exploitable parallelism for Logic Programming has received ample attention. Defeasible Argutmentation is specially apt for this optimizing technique. Defeasible Logic Programming (DLP), which is based on a defeasible argumentation formalism, could take full advantage of this type of parallel…
Fecha:	2004-05-06
Recurso:	Unversidad Nacional de La Plata

Recurso libre

44.

A genetic based neuro-fuzzy controller for thermal processes
Goel, Ashok Kumar - Saxena Chandra, Suresh - Surekha, Bhanot

Formato:	Articulo, Articulo
Enlaces:	This paper presents a neuro-fuzzy network where all its parameters can be tuned simultaneously using Genetic Algorithms. The approach combines the merits of fuzzy logic theory, neural networks and genetic algorithms. The proposed neuro-fuzzy network does not require a priori…
Fecha:	2008-05-22
Recurso:	Unversidad Nacional de La Plata

Recurso libre

45.

Cyclic evolution: a new strategy for improving controllers obtained by layered evolution
Olivera, Javier Hugo - Lanzarini, Laura Cristina

Formato:	Articulo, Articulo
Enlaces:	Complex control tasks may be solved by dividing them into a more specific and more easily handled subtasks hierarchy. Several authors have demonstrated that the incremental layered evolution paradigm allows obtaining controllers capable of solving this type of tasks. In…
Fecha:	2008-05-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

46.

Cellular memetic algorithms
Alba, Enrique - Dorronsoro, Bernabé - Alfonso, Hugo

Formato:	Articulo, Articulo
Enlaces:	This work is focussed on the development and analysis of a new class of algorithms, called cellular memetic algorithms (cMAs), which will be evaluated here on the satisfiability problem (SAT). For describing a cMA, we study the effects of adding…
Fecha:	2008-05-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

47.

Learning object semantic description for enhancing reusability
Señas, Perla - Moroni, Norma

Formato:	Articulo, Articulo
Enlaces:	In the design of activities for Web-Based Education Systems, the concept of Didactic Object or Learning Object, has appeared as the axis of a new paradigm concerned with the reusability of contents and activities, due to its organization from a…
Fecha:	2008-05-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

48.

Test of distributed applications migration to Web environments
Ciolli, María Elena

Formato:	Articulo, Revision
Enlaces:	This essay is based on a previous “regression” testing knowledge, black box testing and user graphic interfaces testing. Besides, due to the fact that the testing life cycle is inside the software life cycle, the suggested focus promotes existing test…
Fecha:	2011-08-31
Recurso:	Unversidad Nacional de La Plata

Recurso libre

49.

A taxonomy for argumentative frameworks based on labelled deduction
Chesñevar, Carlos Iván

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Artificial Intelligence has long dealt with the issue of finding a suitable formalization for reasoning with incomplete and potentially inconsistent information. Defeasible argumentation [SL92,CML00,PraVre99] has proven to be a successful approach in many respects, since it naturally resembles many aspects…
Fecha:	2012-09-27
Recurso:	Unversidad Nacional de La Plata

Recurso libre

50.

Adaptive Ttwo-phase spatial association rules mining method
Lee, Chin-Feng - Chen, Mei-Hsiu

Formato:	Articulo, Articulo
Enlaces:	Since huge amounts of spatial data can be easily collected from various applications, ranging from remote sensing technology to geographical information system, the extraction and comprehension of spatial knowledge is a more and more important task. Many excellent studies on…
Fecha:	2008-05-20
Recurso:	Unversidad Nacional de La Plata