301.
Environmental risk assessment of accidental releases in chemical plants through fuzzy logic
- Darbra Roman, Rosa Maria; Casal Fàbrega, Joaquim
Environmental risk assessment is an essential element in any decision making processin order to minimize the effects of human activities on the environment. Unfortunately,in many occasions, environmental data tend to be vague and imprecise and as aconsequence uncertainty is associated to any study related to it. Uncertainty in riskassessment may have essentially two origins: randomness and incompleteness. In thispaper, fuzzy logic is used to manage this uncertainty in environmental data concerningaccidental releases in chemical plants. The methodology developed allows assessing theenvironmental risk of such releases using a set of parameters treated with fuzzy logic.This method can be used as a...
302.
How to measure uncertainties in environmental risk assassment
- Darbra Roman, Rosa Maria; Eljarrat, E; Barceló, D
Environmental risk assessment is an essential element in any decision-makingprocess in order to minimize the effects of human activities on the environment.Unfortunately, often environmental data tends to be vague andimprecise, so uncertainty is associated with any study related with these kindof data.Essentially, uncertainty in risk assessment may have two origins – randomnessand incompleteness. There are two main ways to deal with theseuncertainties – probability theory and fuzzy logic.Probability theory is based on a stochastic approach, using probabilityfunctions to describe random variability in environmental parameters.Fuzzy logic uses membership functions and linguistic parameters toexpress vagueness in environmental issues.We discuss the best way...
303.
Propuesta para la implantación de un proceso creativo en organizaciones que desarrollan innovaciones tecnológicas
- Montes Hincapié, Juan Manuel; Escorsa i Castells, Pere; Lloveras Macià, Joaquín
Weiner (1995) argumenta que las ideas fundamentales y fructíferas, son engran medida accidentes afortunados e impredecibles. Pero también es cierto que lacreatividad no es solo un momento, es un proceso que puede ser desarrollado demanera lógica y sistemática en las organizaciones y es en este proceso creativo donde los principios de solución son desarrollados a partir de oportunidades identificadas para impulsar innovaciones tecnológicas. Este artículo expone una metodología para aplicar sistemáticamente un proceso que involucra: Vigilancia tecnológica, Inteligencia competitiva, y Creatividad, –denominado por el autor "Proceso VIC"– para identificar principios de solución. Esta metodología involucra las siguientes fases: 1) Identificación...
304.
Propuesta para la implantación de un proceso creativo en organizaciones que desarrollan innovaciones tecnológicas
- Montes Hincapié, Juan Manuel; Escorsa i Castells, Pere; Lloveras Macià, Joaquín
Weiner (1995) argumenta que las ideas fundamentales y fructíferas, son en gran medida accidentes afortunados e impredecibles. Pero también es cierto que la creatividad no es solo un momento, es un proceso que puede ser desarrollado de manera lógica y sistemática en las organizaciones y es en este proceso creativo donde los principios de solución son desarrollados a partir de oportunidades identificadas para impulsar innovaciones tecnológicas. Este artículo expone una metodología para aplicar sistemáticamente un proceso que involucra: Vigilancia tecnológica, Inteligencia competitiva, y Creatividad, – denominado por el autor “Proceso VIC” – para identificar principios de solución. Esta metodología involucra...
305.
A Rudimentary Machine. Experiences in the Design of a Pedagogic Computer
- Pastor Llorens, Enric; Sánchez Carracedo, Fermín; Corral González, Anna M. del
This paper describes a pedagogic computer named\M aquina Rudimentaria". This computer has been de-signed to be used in a rst course on logic design or com-puter architecture; orthogonality and simplicity have beenthe major goals. The description of the computer includesthe de nition of both the machine and the assembly lan-guage, the implementation of the datapath and the opti-mization of the control unit. A programming frameworkhas been designed to allow the development of small pro-grams in assembly language, their compilation and detailedsimulation on the proposed architecture.
306.
A schema-only approach to validate XML schema mappings
- Rull Fort, Guillem; Farré Tost, Carles; Teniente López, Ernest; Urpí Tubella, Antoni
Since the emergence of the Web, the ability to map XML data between different data sources has become crucial. Defining a mapping ishowever not a fully automatic process. The designer needs to figure out whether the mapping is what was intended. Our approach to thisvalidation consists of defining and checking certain desirable properties of mappings. We translate the XML schemas and the mapping intofirst-order logic formalism and apply a reasoning mechanism to check the desirable properties automatically, without assuming anyparticular instantiation of the schemas.
307.
Herramienta computacional para la evaluación post-sísmica de daños en edificios
- Carreño Tibaduiza, Martha Liliana; Cardona, Omar. D.; Marulanda, Mabel C.; Barbat Barbat, Horia Alejandro
En este artículo se desarrolla un método y una herramienta computacional orientada a apoyar la evaluación de daños y de la seguridad de los edificios después de sismos fuertes. Los datos de entrada del programa decomputador corresponden a información subjetiva e incompleta del estado deledificio, obtenida por profesionales posiblemente inexpertos en el campo de laconstrucción. Los niveles de daño de los componentes estructurales normalmenteson descritos por calificaciones lingüísticas que pueden ser adecuadamenteprocesadas con técnicas de inteligencia computacional basadas en sistemas neurodifusos. Estas técnicas facilitan la realización de las complejas y urgentes tareas de toma de decisiones de los ingenieros en...
308.
Topology-aware group communication middleware for MANETs
- Garcia-Lopez, Pedro; Gracia, Raúl; Espelt, Marc; París, Gerard; Arrufat, Marcel; Meseguer Pallarès, Roc
We believe that any MANET middleware should be aware of the underlying multi-hop routing protocol to improve communication efficiency. In general, existing MANET middleware either ignore the underlying routing protocol or create specific cross-layer solutions that break the strict layering of the network stack. This problem is even more severe in the case of traditional group communication middleware (GC) where membership protocols, failure detection mechanisms or flow control layers can considerably harm the overall performance of the network. We propose to move the routing logic to the application layer in order to achieve a smooth and clean integration between the...
309.
Application of fuzzy logic to the preliminary assessment of fish pollution due to lipophilic substance releases in rivers
- Darbra Roman, Rosa Maria; Eljarrat, E; Barceló, D
Preprint
310.
Environmental risk assassment of presistent organic pollutants in river-basins though fuzzy logic
- Darbra Roman, Rosa Maria; Eljarrat, E; Barceló, D
Postprint (published version)
311.
Arquitectura de los sistemas basados en dispositivos lógicos programables. Tema 2 de Sistemas Digitales de Instrumentación y Control
- Ramos Lara, Rafael Ramón
Transparencias del tema 2 de la asignatura
312.
Concurs per a una Llar d'Infants
- Curós i Vilà, Joan; Ferrer Masip, Xavier
El projecte defineix un carrer interior tangent a l’edifici del pavelló per on es produeix l’entrada i per on s’atravessa visualment l’edifici, de manera que la façana del pavelló te continuïtat cap a l’interior de la llar d’infants. Perpendicularment es disposa l’espai del vestíbul que articula els espais de circulació i dona sortida i visuals al pati de jocs. Les zones de pas tenen una alçada inferior a la de les altres àrees per lògica d’us i per donar claredat volumètrica a l’edifici. L’entrada es produeix per una rampa, sota un voladís que a l’hora recull l’escletxa oberta a la...
313.
HERMES: A research project on human sequence evaluation
- Gonzàlez, Jordi; Roca, Francesc Xavier; Villanueva, Juan J.
Human Sequence Evaluation concentrates on how to extract descriptions of human behaviour from videos in a restricted discourse domain, such as (i) pedestrians crossing inner-city roads where pedestrians appear approaching or waiting at stops of busses or trams, and (ii) humans in indoor worlds like an airport hall, a train station, or a lobby. These discourse domains allow to explore a coherent evaluation of human movements and facial expressions across a wide variation of scale. This general approach lends itself to various cognitive surveillance scenarios at varying degrees of resolution: from wide-field-of-view multiple-agent scenes, through to more specific inferences of...
314.
Natural language descriptions of human behaviour from video sequences
- Fernández, Carles; Baiget, Pau; Roca, Francesc Xavier; Gonzàlez, Jordi
This contribution addresses the generation of textual descriptions in several natural languages for evaluation of human behavior in video sequences. The problem is tackled by converting geometrical information extracted from videos of the scenario into predicates in fuzzy logic formalism, which facilitates the internal representations of the conceptual data and allows the temporal analysis of situations in a deterministic fashion, by means of Situation Graph Trees (SGTs). The results of the analysis are stored in structures proposed by the Discourse Representation Theory (DRT), which facilitate a subsequent generation of natural language text. This set of tools has been proved to...
315.
Semantic annotation of complex human scenes for multimedia surveillance
- Fernández, Carles; Baiget, Pau; Roca, Francesc Xavier; Gonzàlez, Jordi
A Multimedia Surveillance System (MSS) is considered for automatically retrieving semantic content from complex outdoor scenes, involving both human behavior and traffic domains. To characterize the dynamic information attached to detected objects, we consider a deterministic modeling of spatio-temporal features based on abstraction processes towards fuzzy logic formalism. A situational analysis over conceptualized information will not only allow us to describe human actions within a scene, but also to suggest possible interpretations of the behaviors perceived, such as situations involving thefts or dangers of running over. Towards this end, the different levels of semantic knowledge implied throughout the process are...
316.
Automatic learning of conceptual knowledge in image sequences for human behavior interpretation
- Baiget, Pau; Fernández, Carles; Roca, Francesc Xavier; Gonzàlez, Jordi
This work describes an approach for the interpretation and explanation of human behavior in image sequences, within the context of a Cognitive Vision System. The information source is the geometrical data obtained by applying tracking algorithms to an image sequence, which is used to generate conceptual data. The spatial characteristics of the scene are automatically extracted from the resuling tracking trajectories obtained during a training period. Interpretation is achieved by means of a rule-based inference engine called Fuzzy Metric Temporal Horn Logic and a behavior modeling tool called Situation Graph Tree. These tools are used to generate conceptual descriptions which...
317.
Optimización de trayectorias de aviones para minimizar la molestia acústica modelizada mediante lógica borrosa
- Prats Menéndez, Xavier; Quevedo Casín, Joseba Jokin; Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç
Peer Reviewed
318.
Semi-Dynamic Demand in a Non-Permutation Flowshop with Constrained Resequencing Buffers.
- Färber, Gerrit Hartmut; Salhi, Said; Coves Moreno, Anna Maria
This work presents the performance comparison of two conceptually different approaches for a mixed model non-permutation flowshop production line. The demand is a semi-dynamic demand with a fixed job sequence for the first station. Resequencing is permitted where stations have access to intermediate or centralized resequencing buffers. The access to the buffers is restricted by the number of available buffer places and the physical size of the products. An exact approach, using Constraint Logic Programming (CLP), and a heuristic approach, a Genetic Algorithm (GA), were applied.
319.
A Boolean algebra approach to the construction of snarks
- Fiol Mora, Miquel Àngel
This work deals with the construction of snarks, that is, cubic graphs that cannot be 3-edge-colored. A natural generalization of the concept of "color", that describes in a simple way the coloring ("0" or "1") of any set of (semi)edges, is introduced. This approach allows us to apply the Boolean logic theory to find an ample family of snarks, which includes many of the previous known constructions and also some interesting ones.
320.
Aircraft annoyance minimization around urban airports based on fuzzy logic
- Quevedo Casín, Joseba Jokin; Prats Menéndez, Xavier; Nejjari Akhi-Elarab, Fatiha; Puig, Vicenç
This paper presents a strategy based on fuzzylogic and lexicographic multi-objective optimization for designing noise abatement procedures aimed at reducing the noise exposure of the population living around the airports. A non-linear multi-objective optimal control problem is formallywritten and identified. A lexicographic optimization technique is presented for establishing a hierarchical order among theoptimization objectives which are the noise at several different sensitive locations and fuel or time consumption criteria. A fuzzy logic set has been established to represent the noise annoyance in four different sensitive locations around the airport. A model for departure procedures has been used and the solution...
