576 research outputs found

    Digitalization and real-time control to mitigate environmental impacts along rivers: Focus on artificial barriers, hydropower systems and European priorities

    Get PDF
    Hydropower globally represents the main source of renewable energy, and provides several benefits, e.g., water storage and flexibility; on the other hand, it may cause significant impacts on the environment. Hence sustainable hydropower needs to achieve a balance between electricity generation, impacts on ecosystems and benefits on society, supporting the achievement of the Green Deal targets. The implementation of digital, information, communication and control (DICC) technologies is emerging as an effective strategy to support such a trade-off, especially in the European Union (EU), fostering both the green and the digital transitions. In this study, we show how DICC can foster the environmental integration of hydropower into the Earth spheres, with focus on the hydrosphere (e.g., on water quality and quantity, hydropeaking mitigation, environmental flow control), biosphere (e.g., improvement of riparian vegetation, fish habitat and migration), atmosphere (reduction of methane emissions and evaporation from reservoirs), lithosphere (better sediment management, reduction of seepages), and on the anthroposphere (e.g., reduction of pollution associated to combined sewer overflows, chemicals, plastics and microplastics). With reference to the abovementioned Earth spheres, the main DICC applications, case studies, challenges, Technology Readiness Level (TRL), benefits and limitations, and transversal benefits for energy generation and predictive Operation and Maintenance (O&M), are discussed. The priorities for the European Union are highlighted. Although the paper focuses primarly on hydropower, analogous considerations are valid for any artificial barrier, water reservoir and civil structure which interferes with freshwater systems.Digitalization and real-time control to mitigate environmental impacts along rivers: Focus on artificial barriers, hydropower systems and European prioritiespublishedVersio

    Advances and Applications of DSmT for Information Fusion. Collected Works, Volume 5

    Get PDF
    This fifth volume on Advances and Applications of DSmT for Information Fusion collects theoretical and applied contributions of researchers working in different fields of applications and in mathematics, and is available in open-access. The collected contributions of this volume have either been published or presented after disseminating the fourth volume in 2015 in international conferences, seminars, workshops and journals, or they are new. The contributions of each part of this volume are chronologically ordered. First Part of this book presents some theoretical advances on DSmT, dealing mainly with modified Proportional Conflict Redistribution Rules (PCR) of combination with degree of intersection, coarsening techniques, interval calculus for PCR thanks to set inversion via interval analysis (SIVIA), rough set classifiers, canonical decomposition of dichotomous belief functions, fast PCR fusion, fast inter-criteria analysis with PCR, and improved PCR5 and PCR6 rules preserving the (quasi-)neutrality of (quasi-)vacuous belief assignment in the fusion of sources of evidence with their Matlab codes. Because more applications of DSmT have emerged in the past years since the apparition of the fourth book of DSmT in 2015, the second part of this volume is about selected applications of DSmT mainly in building change detection, object recognition, quality of data association in tracking, perception in robotics, risk assessment for torrent protection and multi-criteria decision-making, multi-modal image fusion, coarsening techniques, recommender system, levee characterization and assessment, human heading perception, trust assessment, robotics, biometrics, failure detection, GPS systems, inter-criteria analysis, group decision, human activity recognition, storm prediction, data association for autonomous vehicles, identification of maritime vessels, fusion of support vector machines (SVM), Silx-Furtif RUST code library for information fusion including PCR rules, and network for ship classification. Finally, the third part presents interesting contributions related to belief functions in general published or presented along the years since 2015. These contributions are related with decision-making under uncertainty, belief approximations, probability transformations, new distances between belief functions, non-classical multi-criteria decision-making problems with belief functions, generalization of Bayes theorem, image processing, data association, entropy and cross-entropy measures, fuzzy evidence numbers, negator of belief mass, human activity recognition, information fusion for breast cancer therapy, imbalanced data classification, and hybrid techniques mixing deep learning with belief functions as well

    (b2023 to 2014) The UNBELIEVABLE similarities between the ideas of some people (2006-2016) and my ideas (2002-2008) in physics (quantum mechanics, cosmology), cognitive neuroscience, philosophy of mind, and philosophy (this manuscript would require a REVOLUTION in international academy environment!)

    Get PDF
    (b2023 to 2014) The UNBELIEVABLE similarities between the ideas of some people (2006-2016) and my ideas (2002-2008) in physics (quantum mechanics, cosmology), cognitive neuroscience, philosophy of mind, and philosophy (this manuscript would require a REVOLUTION in international academy environment!

    La valoración de empreses mediante la lógica borrosa

    Full text link
    [spa] La complejidad de la toma de decisiones en el campo de la economía y las finanzas se ha incrementado en los últimos años. Como resultado, se está prestando cada vez más atención al desarrollo e implementación de modelos matemáticos que puedan dar respuesta a estos problemas. La investigación en el campo de la lógica borrosa ha sido un tema de creciente interés durante muchas décadas, ya que es un concepto fundamental y común en la ciencia. Desde 1965, cuando se publicó el título seminal "Fuzzy sets" (Zadeh, L. A. 1965), se produjo un cambio de la lógica binaria a la lógica multivalente. Este cambio permite dar paso a teorías relacionadas con la incertidumbre, a través de una metodología borrosa, para poder considerar todos los escenarios posibles en la toma de decisiones, teniendo en cuenta la objetividad y subjetividad de los parámetros a considerar. En general, el objetivo principal de esta tesis doctoral es identificar las características y oportunidades de negocio a través de un análisis de valoración de empresas, que permita una mejor interpretación del contexto incierto para la toma de decisiones. Es decir, la teoría de la decisión en la incertidumbre se desarrolla con la valoración de empresas. Se analiza la situación en la que se encuentra y se estudian las aportaciones que podemos hacer en este campo con los principales algoritmos de lógica difusa estudiados por autores como J. Gil Aluja, A. Kaufmann, R. Yager, entre otros, con especial énfasis en aquellos que han sido aplicados al ámbito empresarial y financiero. La valoración de empresas es un proceso fundamental y complejo en los sistemas económico-financieros. En un entorno que evoluciona hacia formas más complejas e inciertas, es necesario presentar nuevos modelos de valoración empresarial más dinámicos basados en técnicas de tratamiento y gestión de la incertidumbre y toma de decisiones, para eliminar la ambigüedad y la confusión en entornos inciertos. La primera aportación de este trabajo es el análisis del estado de la cuestión realizado a través de dos estudios bibliométricos que estudian las aportaciones de la comunidad científica a la lógica borrosa y la valoración empresarial. Destaca la importancia de los factores subjetivos a la hora de tomar decisiones en un entorno económico y financiero. La segunda contribución es el desarrollo de aplicaciones que muestren la toma de decisiones en la incertidumbre aplicada a los métodos de valoración de empresas. Este estudio nos permite desarrollar algoritmos genéricos y modelos matemáticos que se pueden aplicar a la realidad empresarial, para probar su utilidad. En este trabajo, se destacan el coeficiente de adecuación, el coeficiente de calificación, la distancia de Hamming, la teoría del clon, el modelo de preferencia subjetiva, el algoritmo húngaro, los operadores OWA, los intervalos y los expertones. La tercera contribución es un nuevo algoritmo que combina la matemática borrosa y la valoración de empresas, lo que contribuye al desarrollo de la teoría de la decisión en el ámbito empresarial. En concreto, se desarrolla un modelo de valoración de empresas mediante el descuento de flujos de caja y las matemáticas borrosas, mostrando su utilidad y la posibilidad de ser aplicado por la comunidad académica y profesional en el posterior análisis del valor de una empresa. El modelo propuesto sistematiza y ordena el uso de intervalos para establecer un valor de negocio mínimo y máximo para la empresa. Por lo tanto, hemos encontrado un intervalo de confianza del posible valor comercial. Finalmente, podríamos decir que a nivel general hay dos aportaciones importantes a destacar en esta tesis doctoral: la aplicabilidad y el desarrollo. Aplicamos algoritmos y modelos en los métodos de valoración de empresas y desarrollamos un nuevo algoritmo que contribuye al desarrollo de la teoría de la decisión

    Automatic Control and Routing of Marine Vessels

    Get PDF
    Due to the intensive development of the global economy, many problems are constantly emerging connected to the safety of ships’ motion in the context of increasing marine traffic. These problems seem to be especially significant for the further development of marine transportation services, with the need to considerably increase their efficiency and reliability. One of the most commonly used approaches to ensuring safety and efficiency is the wide implementation of various automated systems for guidance and control, including such popular systems as marine autopilots, dynamic positioning systems, speed control systems, automatic routing installations, etc. This Special Issue focuses on various problems related to the analysis, design, modelling, and operation of the aforementioned systems. It covers such actual problems as tracking control, path following control, ship weather routing, course keeping control, control of autonomous underwater vehicles, ship collision avoidance. These problems are investigated using methods such as neural networks, sliding mode control, genetic algorithms, L2-gain approach, optimal damping concept, fuzzy logic and others. This Special Issue is intended to present and discuss significant contemporary problems in the areas of automatic control and the routing of marine vessels

    The application of z-numbers in fuzzy decision making: The state of the art

    Get PDF
    A Z-number is very powerful in describing imperfect information, in which fuzzy numbers are paired such that the partially reliable information is properly processed. During a decision-making process, human beings always use natural language to describe their preferences, and the decision information is usually imprecise and partially reliable. The nature of the Z-number, which is composed of the restriction and reliability components, has made it a powerful tool for depicting certain decision information. Its strengths and advantages have attracted many researchers worldwide to further study and extend its theory and applications. The current research trend on Z-numbers has shown an increasing interest among researchers in the fuzzy set theory, especially its application to decision making. This paper reviews the application of Z-numbers in decision making, in which previous decision-making models based on Z-numbers are analyzed to identify their strengths and contributions. The decision making based on Z-numbers improves the reliability of the decision information and makes it more meaningful. Another scope that is closely related to decision making, namely, the ranking of Z-numbers, is also reviewed. Then, the evaluative analysis of the Z-numbers is conducted to evaluate the performance of Z-numbers in decision making. Future directions and recommendations on the applications of Z-numbers in decision making are provided at the end of this review

    Changing Priorities. 3rd VIBRArch

    Full text link
    In order to warrant a good present and future for people around the planet and to safe the care of the planet itself, research in architecture has to release all its potential. Therefore, the aims of the 3rd Valencia International Biennial of Research in Architecture are: - To focus on the most relevant needs of humanity and the planet and what architectural research can do for solving them. - To assess the evolution of architectural research in traditionally matters of interest and the current state of these popular and widespread topics. - To deepen in the current state and findings of architectural research on subjects akin to post-capitalism and frequently related to equal opportunities and the universal right to personal development and happiness. - To showcase all kinds of research related to the new and holistic concept of sustainability and to climate emergency. - To place in the spotlight those ongoing works or available proposals developed by architectural researchers in order to combat the effects of the COVID-19 pandemic. - To underline the capacity of architectural research to develop resiliency and abilities to adapt itself to changing priorities. - To highlight architecture's multidisciplinarity as a melting pot of multiple approaches, points of view and expertise. - To open new perspectives for architectural research by promoting the development of multidisciplinary and inter-university networks and research groups. For all that, the 3rd Valencia International Biennial of Research in Architecture is open not only to architects, but also for any academic, practitioner, professional or student with a determination to develop research in architecture or neighboring fields.Cabrera Fausto, I. (2023). Changing Priorities. 3rd VIBRArch. Editorial Universitat Politècnica de València. https://doi.org/10.4995/VIBRArch2022.2022.1686

    XXV. mezinárodní kolokvium o regionálních vědách

    Get PDF
    Title in English: 25th International Colloquium on Regional Sciences: Conference proceedings The conference proceedings consists of papers presented at the 25th International Colloquium on Regional Sciences that was organized by Department of Regional Economics and Administration FEA MU. It contains 57 articles arranged by topic. The individual articles deal with e.g. socioeconomic disparities among regions, regional policy, territory attractiveness, tourism, or regional public administration
    corecore