5 resultados para Supervised and Unsupervised Classification
em Portal de Revistas Científicas Complutenses - Espanha
Resumo:
The study of the Upper Jurassic-Lower Cretaceous deposits (Higueruelas, Villar del Arzobispo and Aldea de Cortés Formations) of the South Iberian Basin (NW Valencia, Spain) reveals new stratigraphic and sedimentological data, which have significant implications on the stratigraphic framework, depositional environments and age of these units. The Higueruelas Fm was deposited in a mid-inner carbonate platform where oncolitic bars migrated by the action of storms and where oncoid production progressively decreased towards the uppermost part of the unit. The overlying Villar del Arzobispo Fm has been traditionally interpreted as an inner platform-lagoon evolving into a tidal-flat. Here it is interpreted as an inner-carbonate platform affected by storms, where oolitic shoals protected a lagoon, which had siliciclastic inputs from the continent. The Aldea de Cortés Fm has been previously interpreted as a lagoon surrounded by tidal-flats and fluvial-deltaic plains. Here it is reinterpreted as a coastal wetland where siliciclastic muddy deposits interacted with shallow fresh to marine water bodies, aeolian dunes and continental siliciclastic inputs. The contact between the Higueruelas and Villar del Arzobispo Fms, classically defined as gradual, is also interpreted here as rapid. More importantly, the contact between the Villar del Arzobispo and Aldea de Cortés Fms, previously considered as unconformable, is here interpreted as gradual. The presence of Alveosepta in the Villar del Arzobispo Fm suggests that at least part of this unit is Kimmeridgian, unlike the previously assigned Late Tithonian-Middle Berriasian age. Consequently, the underlying Higueruelas Fm, previously considered Tithonian, should not be younger than Kimmeridgian. Accordingly, sedimentation of the Aldea de Cortés Fm, previously considered Valangian-Hauterivian, probably started during the Tithonian and it may be considered part of the regressive trend of the Late Jurassic-Early Cretaceous cycle. This is consistent with the dinosaur faunas, typically Jurassic, described in the Villar del Arzobispo and Aldea de Cortés Fms.
Resumo:
Fossil associations from the middle and upper Eocene (Bartonian and Priabonian) sedimentary succession of the Pamplona Basin are described. This succession was accumulated in the western part of the South Pyrenean peripheral foreland basin and extends from deep-marine turbiditic (Ezkaba Sandstone Formation) to deltaic (Pamplona Marl, Ardanatz Sandstone and Ilundain Marl formations) and marginal marine deposits (Gendulain Formation). The micropalaeontological content is high. It is dominated by foraminifera, and common ostracods and other microfossils are also present. The fossil ichnoasssemblages include at least 23 ichnogenera and 28 ichnospecies indicative of Nereites, Cruziana, Glossifungites and ?Scoyenia-Mermia ichnofacies. Body macrofossils of 78 taxa corresponding to macroforaminifera, sponges, corals, bryozoans, brachiopods, annelids, molluscs, arthropods, echinoderms and vertebrates have been identified. Both the number of ichnotaxa and of species (e. g. bryozoans, molluscs and condrichthyans) may be considerably higher. Body fossil assemblages are comparable to those from the Eocene of the Nord Pyrenean area (Basque Coast), and also to those from the Eocene of the west-central and eastern part of South Pyrenean area (Aragon and Catalonia). At the European scale, the molluscs assemblages seem endemic from the Pyrenean area, although several Tethyan (Italy and Alps) and Northern elements (Paris basin and Normandy) have been recorded. Palaeontological data of studied sedimentary units fit well with the shallowing process that throughout the middle and late Eocene occurs in the area, according to the sedimentological and stratigraphical data.
Resumo:
Se estudia la codificación y organización del campo de las Ciencias de la Comunicación, fundamentalmente los códigos Unesco. El objetivo es plantear un cambio en estos códigos, puesto que la forma de clasificar y organizar un dominio científico tiene consecuencias de naturaleza operativa y epistemológica en el propio trabajo científico. En este trabajo se estudia la clasificación actual, que muestra una presencia escasa y dispersa de los términos vinculados a Comunicación. Se describen las dificultades prácticas y teóricas que conlleva su reorganización, las posibles fuentes (planes de estudio, congresos, revistas científicas, propuestas documentales y palabras clave) y los métodos de trabajo que se pueden emplear, tomando como bases teóricas el dominio de la Organización del Conocimiento y el de la Comunicación. Por último, se analizan dos ámbitos disciplinares diferentes (Historia de la Comunicación y Tecnologías de la Comunicación), mediante la información recogida, en una base de datos, de asignaturas en grado y en másteres oficiales de 12 universidades españolas. También se observa que este tipo de propuesta requiere el conocimiento derivado de instrumentos documentales como las clasificaciones y los tesauros.
Resumo:
Cuando abordamos un trabajo de investigación en cualquier centro de documentación que albergue fondo antiguo a menudo nos topamos con papeles o cuadernillos de pocas hojas que muchas veces han pasado desapercibidos y están sin catalogar. La naturaleza de éstos resulta diversa y, en ocasiones, también su identificación puede llegar a ser compleja seguramente por el mero hecho de aparecer muchos de ellos descontextualizados. Por esta razón, el presente artículo pretende establecer una guía sistemática que englobe, clasifique y describa aquellos más habituales en los archivos para facilitar así su identificación.
Resumo:
This paper aims to investigate the use of collocations in DELE B1. We select the reading texts from DELE B1 (2010 to 2014) as research data. The investigation includes: First of all, we will study the theory of collocation and the classification as well as its application to the foreign language learning and teaching. Second, we will analyze the types of collocation annotated by Corpus Tool. Third, we tend to calculate the frequency use of each type of collocations written in Spanish reading texts. Next, we will discuss the interrelationship between collocations and text themes. Finally, we would like to compare the differences of results of collocation use between these two corpus tools: Corpus Tool and Corpus del Español in order to understand the native speakers’ preference of use collocations as well as to provide supplementay materials for teaching of Spanish reading. We hope that the expected results of our research will offer useful references for improving students' Spanish reading comprehension to pass DELE B1 examinations.