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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Interval neutrosophic sets and logic theory and applications in computing /

Wang, Haibin. January 2005 (has links)
Thesis (Ph. D.)--Georgia State University, 2005. / 1 electronic text (119 p. : ill.) : digital, PDF file. Title from title screen. Rajshekhar Sunderraman, committee chair; Yan-Qing Zhang, Anu Bourgeois, Lifeng Ding, committee members. Description based on contents viewed Apr. 3, 2007. Includes bibliographical references (p. 112-119).
2

Neural network classification based on quantification of uncertainty /

Kraipeerapun, Pawalai. January 2009 (has links)
Thesis (Ph.D.)--Murdoch University, 2009. / Thesis submitted to the Faculty of Creative Technologies and Media. Inlcudes bibliographical references (leaves 179-191)
3

Novel Application of Neutrosophic Logic in Classifiers Evaluated under Region-Based Image Categorization System

Ju, Wen 01 May 2011 (has links)
Neutrosophic logic is a relatively new logic that is a generalization of fuzzy logic. In this dissertation, for the first time, neutrosophic logic is applied to the field of classifiers where a support vector machine (SVM) is adopted as the example to validate the feasibility and effectiveness of neutrosophic logic. The proposed neutrosophic set is integrated into a reformulated SVM, and the performance of the achieved classifier N-SVM is evaluated under an image categorization system. Image categorization is an important yet challenging research topic in computer vision. In this dissertation, images are first segmented by a hierarchical two-stage self organizing map (HSOM), using color and texture features. A novel approach is proposed to select the training samples of HSOM based on homogeneity properties. A diverse density support vector machine (DD-SVM) framework that extends the multiple-instance learning (MIL) technique is then applied to the image categorization problem by viewing an image as a bag of instances corresponding to the regions obtained from the image segmentation. Using the instance prototype, every bag is mapped to a point in the new bag space, and the categorization is transformed to a classification problem. Then, the proposed N-SVM based on the neutrosophic set is used as the classifier in the new bag space. N-SVM treats samples differently according to the weighting function, and it helps reduce the effects of outliers. Experimental results on a COREL dataset of 1000 general purpose images and a Caltech 101 dataset of 9000 images demonstrate the validity and effectiveness of the proposed method.
4

Interval Neutrosophic Sets and Logic: Theory and Applications in Computing

Wang, Haibin 12 January 2006 (has links)
A neutrosophic set is a part of neutrosophy that studies the origin, nature, and scope of neutralities, as well as their interactions with different ideational spectra. The neutrosophic set is a powerful general formal framework that has been recently proposed. However, the neutrosophic set needs to be specified from a technical point of view. Here, we define the set-theoretic operators on an instance of a neutrosophic set, and call it an Interval Neutrosophic Set (INS). We prove various properties of INS, which are connected to operations and relations over INS. We also introduce a new logic system based on interval neutrosophic sets. We study the interval neutrosophic propositional calculus and interval neutrosophic predicate calculus. We also create a neutrosophic logic inference system based on interval neutrosophic logic. Under the framework of the interval neutrosophic set, we propose a data model based on the special case of the interval neutrosophic sets called Neutrosophic Data Model. This data model is the extension of fuzzy data model and paraconsistent data model. We generalize the set-theoretic operators and relation-theoretic operators of fuzzy relations and paraconsistent relations to neutrosophic relations. We propose the generalized SQL query constructs and tuple-relational calculus for Neutrosophic Data Model. We also design an architecture of Semantic Web Services agent based on the interval neutrosophic logic and do the simulation study.
5

Life cycle assessment applied to the sustainable design of prestressed bridges in coastal environment

Navarro Martínez, Ignacio Javier 07 January 2020 (has links)
[ES] La sostenibilidad ha ido adquiriendo una presencia relevante en nuestra sociedad desde su primera definición en 1987 por parte de la Comisión Brundtland. Desde entonces, la comunidad científica ha llevado a cabo importantes esfuerzos en el desarrollo de normativas, herramientas y criterios para lograr diseños en esa línea. A pesar de ello, estos esfuerzos no han sido suficientes para lograr trazar un futuro realmente sostenible a corto plazo. Como respuesta al estado actual e insuficiente de desarrollo, las Naciones Unidas han establecido recientemente los Objetivos de Desarrollo Sostenible, los cuales deben alcanzarse en 2030. En dichos Objetivos se atiende explícitamente al papel de las infraestructuras, que se revelan como elementos clave para asegurar la consecución de los mencionados Objetivos. Sin embargo, a pesar de las relevantes implicaciones del diseño de infraestructuras, y a pesar de que la mayoría de las infraestructuras están diseñadas para servir a un grupo significativo de personas durante un periodo intergeneracional de tiempo, el diseño sostenible y resiliente de infraestructuras todavía carece de una metodología estandarizada que considere sus ciclos de vida desde una perspectiva holística. En la actualidad, tanto las metodologías de evaluación del ciclo de vida ambiental como las económicas muestran un estado de desarrollo relativamente maduro. Sin embargo, la dimensión social todavía se considera en estado embrionario, comprometiendo por tanto el empleo de métodos de evaluación multidimensionales de la sostenibilidad. La presente tesis propone una metodología extendida basada en la norma ISO 14040 de enfoque puramente medioambiental para evaluar la sostenibilidad del ciclo de vida de las infraestructuras mediante la consideración simultánea y coherente de las tres dimensiones de la misma, a saber, el medio ambiente, la economía y la sociedad. Se propone aquí una nueva metodología para evaluar las infraestructuras desde la dimensión social, integrando al mismo tiempo dichas evaluaciones en un marco basado en la norma ISO 14040. A continuación, se aplica una técnica de toma de decisión multicriterio para integrar las tres perspectivas. Con el fin de tener en cuenta las incertidumbres no probabilísticas implicadas en la asignación de pesos al emplear dichas técnicas, se propone aquí un nuevo enfoque neutrosófico para la determinación de los pesos resultantes de la aplicación de la técnica AHP con grupos de decisores. Se ha considerado como caso de estudio el diseño sostenible de un puente de hormigón pretensado en un entorno costero para construir la metodología propuesta. El enfoque holístico en la evaluación de la sostenibilidad de las infraestructuras se revela esencial frente a las habituales evaluaciones basadas únicamente en la consideración de la dimensión medioambiental. Se ha observado que el mantenimiento preventivo resulta más sostenible a lo largo del ciclo de vida en comparación con las estrategias de mantenimiento reactivo. Esta tesis proporciona una guía para el diseño sostenible de estructuras de hormigón, aunque la metodología sugerida puede aplicarse a cualquier tipo de infraestructura. / [CAT] La sostenibilitat ha anat adquirint una presència rellevant en la nostra societat des de la seva primera definició el 1987 per part de la Comissió Brundtland. Des de llavors, la comunitat científica ha dut a terme importants esforços en el desenvolupament de normatives, eines i criteris per aconseguir dissenys sostenibles. Tot i això, aquests esforços no han estat suficients per aconseguir traçar un futur realment sostenible a curt termini. Com a resposta a l'estat actual i insuficient de desenvolupament, les Nacions Unides han establert recentment els Objectius de Desenvolupament Sostenible, els quals s'han d'assolir en 2030. En aquests Objectius s'atén explícitament al paper de les infraestructures, que es revelen com a elements clau per assegurar la consecució dels esmentats Objectius. No obstant això, tot i les rellevants implicacions del disseny d'infraestructures, i tot i que la majoria de les infraestructures estan dissenyades per servir a un grup significatiu de persones durant un període intergeneracional de temps, el disseny sostenible i resilient d'infraestructures encara no té una metodologia estandarditzada per determinar la seva sostenibilitat al llarg dels seus cicles de vida des d'una perspectiva holística. En l'actualitat, tant les metodologies d'avaluació del cicle de vida ambiental com les econòmiques mostren un estat de desenvolupament relativament madur. No obstant això, la dimensió social encara es considera en estat embrionari, comprometent per tant el desenvolupament de mètodes d'avaluació multidimensionals de la sostenibilitat. La present tesi proposa una metodologia basada en la norma ISO 14040 d'orientació mediambiental per avaluar la sostenibilitat del cicle de vida de les infraestructures mitjançant la consideració simultània i coherent de les tres dimensions de la sostenibilitat, és a dir, el medi ambient, l'economia i la societat. Es proposa aquí una nova metodologia per avaluar les infraestructures des de la dimensió social, integrant al mateix temps aquestes avaluacions en un marc basat en la norma ISO 14040. A continuació, s'aplica una tècnica de presa de decisió multicriteri per integrar les tres dimensions de la sostenibilitat. Per tal de tenir en compte les incerteses no probabilístiques implicades en l'assignació de pesos a l'emprar aquestes tècniques, es proposa aquí un nou enfocament neutrosófic per a la determinació dels pesos resultants de l'aplicació de la tècnica AHP amb grups de decisors. S'ha considerat com a cas d'estudi el disseny sostenible d'un pont de formigó pretesat en un entorn costaner per construir la metodologia proposada. L'enfocament holístic en l'avaluació de la sostenibilitat de les infraestructures es revela essencial en contrast a les habituals avaluacions de la sostenibilitat basades únicament en la consideració de la dimensió mediambiental. S'ha observat que el manteniment preventiu resulta en millors valors de rendiment de sostenibilitat del cicle de vida en comparació amb les estratègies de manteniment reactiu. Aquesta tesi proporciona una guia per al disseny sostenible d'estructures de formigó, encara que la metodologia sugerida pot aplicar-se a qualsevol tipus d'infraestructura. / [EN] Sustainability has gained relevant presence in our society since its first definition in 1987 by the Brundtland Commission. Ever since, the scientific community has put significant efforts in the development of standards, tools and criteria to reach sustainable designs. Notwithstanding the above, such efforts have not been enough to outline a truly sustainable future in the short term. As a response to the actual, insufficient state of development, the United Nations have recently established the Sustainable Development Goals to be reached by 2030. In such Goals, explicit attention is paid to the role of infrastructures, which are revealed as key elements to ensure the achievement of the mentioned Goals. However, despite the relevant implications of infrastructure design, and despite the fact that most infrastructures are designed to serve a significant group of people over an intergenerational period of time, the design of sustainable and resilient infrastructures is still lacking of a standarised methodology to determine their sustainability along their life cycles from a holistic perspective. Currently, both the environmental and the economic life cycle assessment methodologies show a relatively mature state of development. However, the social dimension is still considered to be in an embryonic state, thus compromising the use of multidimensional sustainability assessment methods. The present thesis proposes an extended methodology based on the environmentally oriented ISO 14040 standard to evaluate the life cycle sustainability of infrastructures through the simultaneous and consistent consideration of the three dimensions of sustainability, namely environment, economy and society. A new methodology is suggested here so as to assess infrastructures from a social dimension, while integrating such assessments into an ISO 14040 based framework. A multi criteria decision making technique is then applied to integrate the three sustainability dimensions into one single assessment. So as to take into consideration the non-probabilistic uncertainties involved in subjective weighting techniques, a novel neutrosophic approach for group AHP weights determination is proposed here. The sustainable design of a prestressed concrete bridge in a coastal environment is assumed as a conducting case study on which to construct the proposed methodology. The holistic approach in the sustainability assessment of infrastructures reveals itself to be essential rather than the usually conducted sustainability assessments based on the sole consideration of the environmental dimension. It has been observed that preventive maintenance results in better life cycle sustainability performance values when compared with reactive maintenance strategies. This thesis provides a guide for the sustainable design of concrete structures, although the suggested methodology can be applied to any type of infrastructure. / Navarro Martínez, IJ. (2019). Life cycle assessment applied to the sustainable design of prestressed bridges in coastal environment [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/134054 / TESIS

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