Bibliographies thématiques / Concetti filtro

Littérature scientifique sur le sujet « Concetti filtro »

Auteur : Grafiati
Publié le 10 mars 2023
Mis à jour le 11 mars 2023

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Articles de revues sur le sujet "Concetti filtro"

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Martins, Amarildo Otávio, Elisângela Silva Lopes Ricardo, Hélvio Silvester Andrade de Sousa, Priscila Lemke et Vanessa de Souza. « Produção de uma cartilha educacional sobre fossas sépticas ». Revista Brasileira de Educação Ambiental (RevBEA) 16, no 6 (1 décembre 2021) : 162–73. http://dx.doi.org/10.34024/revbea.2021.v16.12336.

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O sistema de fossa séptica-filtro é um tratamento de esgoto doméstico que ocorre pela ação de microrganismos, que são responsáveis pela decomposição da matéria orgânica. Foi desenvolvido uma cartilha educacional com relação ao conceito, funcionamento e manutenção das fossas sépticas e filtros anaeróbios, elaborada por estudantes do IFC, utilizando um programa de design gráfico. A cartilha complementa as políticas públicas de saneamento na cidade de Pomerode (SC), que através de um Diagnóstico Amostral identificou que 91,70% da população utiliza o tratamento unifamiliar de esgoto doméstico através do sistema de Fossa Séptica e filtro anaeróbio; ressaltando a importância da elaboração da cartilha educacional.
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Castro, Fabrício Rodrigues, Saulo Pomponet Oliveira, Jeferson de Souza et Francisco José Fonseca Ferreira. « COMBINING TILT DERIVATIVE FILTERS : NEW APPROACHES TO ENHANCE MAGNETIC ANOMALIES ». Revista Brasileira de Geofísica 36, no 3 (6 septembre 2018) : 1. http://dx.doi.org/10.22564/rbgf.v36i3.1956.

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ABSTRACT. We extend the concept of two earlier enhancement techniques based on the local phase of the magnetic anomaly, namely the vertical (TDR) and horizontal (TDX) tilt angles, which are defined by the inverse tangent of ratios involving the total horizontal gradient and the vertical derivative. These filters are useful to locate both shallow and deep sources, because they equalize the signal amplitudes. The proposed approach is based on the addition and subtraction of TDR and TDX. The TDR+TDX filter produces constant values over the causative bodies, while TDR-TDX generates peaks over the center of bodies and is constant out of them. By applying the proposed techniques to synthetic and aeromagnetic data we show that they locate more clearly the centers and edges of the sources in comparison to TDR and TDX, respectively. The combined filters have essentially the same computational cost as TDR and TDX and can replace them as auxiliary interpretation tools.Keywords: Qualitative Methods, Local Phase Filters, Aeromagnetic Data.RESUMO. Estendemos o conceito de duas técnicas de realce baseadas na fase local da anomalia magnética: as inclinações do sinal analítico (TDR) e do gradiente horizontal total (TDX), definidos pelo arco tangente de razões envolvendo o gradiente horizontal total e a derivada vertical. Estes filtros são úteis para localizar tanto fontes rasas quanto profundas. O método proposto baseia-se na adição e subtração dos filtros TDR e TDX. O filtro TDR+TDX produz valores constantes sobre as fontes causadoras, enquanto que o TDR-TDX produz picos sobre o centro dos corpos e é constante onde fontes causadoras não são verificadas. Aplicando as técnicas propostas aos dados sintéticos e reais mostra-se que elas localizam mais claramente os centros e as bordas dos corpos em comparação com o TDR e o TDX, respectivamente. Os filtros combinados têm essencialmente o mesmo custo computacional dos filtros originais, TDR e TDX, e podem substituí-los como ferramentas de interpretação.Palavras-chave: Métodos Qualitativos, Filtros de Fase Local, Dados Aeromagnéticos. Federal
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Mezzaroba, Mariana Pessini, et Clerilei Aparecida Bier. « Revisão Sistemática da Literatura sobre Democracia Eletrônica e Governo Eletrônico ». Conpedi Law Review 1, no 9 (6 juin 2016) : 208. http://dx.doi.org/10.26668/2448-3931_conpedilawreview/2015.v1i9.3379.

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O presente artigo busca, por meio de uma revisão sistemática da literatura, responder a seguinte pergunta de pesquisa: Quais são os métodos utilizados em artigos que contenham as palavras e democracy e e-government e quais os conceitos destes temas? Para a seleção dos artigos utilizou-se a base de dados Scopus, com as palavras-chave e-democracy AND e-government e o filtro temporal de publicações a partir dos anos 2000 até o mês de Junho de 2015. Através de filtros foram selecionados dez artigos que compõe a amostra deste estudo. Após a análise pode-se perceber que o conceito de governo eletrônico é razoavelmente uniformizado, enquanto que o mesmo não acontece com a definição de democracia eletrônica. Além disso, pode-se afirmar que os artigos são principalmente baseados em métodos qualitativos e que são mais escassos a abordagem de pesquisas aplicadas. As poucas referências encontradas evidenciam o espaço e a necessidade de novas pesquisas que possam aprofundar, principalmente, o estudo de iniciativas e experiências de governo e democracia eletrônica.
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Sapena, A., S. Morillas et José Camacho. « Derivative-based optimization in colour image filtering an application for derivative learning ». Modelling in Science Education and Learning 2 (20 juin 2009) : 45. http://dx.doi.org/10.4995/msel.2009.3117.

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<p>La noción de derivada de una función y su aplicación a la optimización de funciones es un problema interesante e ilustrativo para los estudiantes de ingeniería. En este trabajo, desarrollamos un aplicación del concepto de derivada para la optimización del filtrado de imágenes en color. Ello implica ajustar el parámetro del filtro para obtener un rendimiento óptimo de filtrado. Proponemos maximizar la calidad de la imagen filtrada representada por la relación señal-ruido (Peak Signal-to-Noise Ratio, PSNR), que es una función del parámetro del filtro. El valor óptimo del parámetro se obtiene mediante un algoritmo basado en la aproximación de la derivada de la función del PSNR de manera que se obtenga la imagen filtrada óptima.</p>
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Oliveira, Suzanna Marielle Silva de, Murilo Barros Silveira, Andrea Alves Ribeiro, Flávia Martins Nascente, João Vicente Macedo Filho, Ana Maria de Castro et Juliana Boaventura Avelar. « Frequência de Doenças Infecciosas em Gestantes de Aparecida de Goiânia, Goiás, Brasil ». Diversitas Journal 5, no 2 (7 avril 2020) : 888–900. http://dx.doi.org/10.17648/diversitas-journal-v5i2-1052.

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O período gestacional não é isento de infecções que comprometam a saúde materno-fetal. Existem riscos do desenvolvimento de doenças infecciosas de transmissão vertical, que pode levar diversos problemas ao desenvolvimento e vitalidade do futuro concepto. O objetivo do presente estudo foi avaliar a frequência de doenças infecciosas em gestantes submetidas à triagem do pré-natal através da técnica do papel filtro na cidade de Aparecida de Goiânia –GO. Trata-se de um estudo transversal de 1.328 gestantes submetidas à triagem pré-natal no período de 2011 a 2016 através da técnica de papel filtro. Após a confirmação dos resultados positivos em papel filtro, a confirmação foi realizada e as frequências encontradas foram de 22,52% para sífilis, 14,23% para toxoplasmose, 7,45% para doenças de Chagas, 4,74% para hepatite pelo vírus B (HBsAg), 3,77% para o vírus HIV, 1,73% para hepatite pelo vírus C (anti-HCV), 1,05% para vírus HTLV, 0,98% para citomegalovírus e 0,15% para rubéola. A importância da triagem para doenças infecciosas de transmissão vertical, é notória no presente estudo, principalmente pela frequência do número de casos de sífilis, toxoplasmose, doença de Chagas e hepatite pelo vírus B. Através do diagnóstico precoce é possível evitar a transmissão vertical e/ou diminuir os comprometimentos fetais. A metodologia de triagem através do papel filtro para diagnóstico de várias infecções de importância na saúde materno-fetal, ressalta a sua necessidade e importância no período pré-natal.
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Bachir Bacha, Aïcha. « Deconstruyendo el concepto de sociedades primitivas. Una reflexión en torno a las Américas precoloniales ». Revista de Arqueología Americana, no 40 (7 novembre 2022) : 157–61. http://dx.doi.org/10.35424/rearam.v0i40.1382.

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El “Nuevo Mundo”, territorio cuyo poblamiento —y por tanto el inicio de su “historia” humana— se remontaría a 18000 a.p.,fue invadido por los europeos en 1492 y bautizado con el nombre de América desde 1507, en honor del navegador florentino Amerigo Vespucci. Este continente continúa recibiendo denominaciones y calificativos que desmerecen su antigüedad, su identidad histórica y su autodefinición. Su temporalidad, territorialidad, organizaciones sociopolíticas y cosmovisiones siguen siendo leídas a través del filtro del pensamiento y la construcción histórica occidentales.
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Rosas Almeida, David Isaías, Jesús Armando Cantú Cárdenas, Juan De Dios Ocampo Díaz et Héctor Muñiz Valdez. « Control Robusto de un Actuador Neumático Basado en la Estructura de Control con Compensación Activa de Perturbaciones para Seguimiento de Trayectorias ». Revista Iberoamericana de Automática e Informática industrial 16, no 2 (20 mars 2019) : 138. http://dx.doi.org/10.4995/riai.2018.9073.

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<p>Se propone una estrategia para resolver el problema de seguimiento de trayectorias en actuadores neumáticos inciertos y con medición parcial del vector de estado. La estrategia se basa en la estructura de control con compensación activa de perturbaciones (ADRC), que está formada por un observador de estado, un filtro pasa bajas y un controlador. En esta propuesta se utiliza un observador de estado discontinuo que estima el vector de estado completo y, utilizando el concepto del control equivalente, permite estimar los términos de perturbación presentes en la planta. El filtro pasa bajas se encarga de recuperar el control equivalente a partir de un término discontinuo del observador. Finalmente, el controlador tiene la estructura básica PD con un término adicional, que corresponde a las perturbaciones estimadas, y que tiene como fin compensar las perturbaciones reales en la planta. El rendimiento del sistema en lazo cerrado se evalúa mediante un índice de desempeño basado en la norma L2.</p>
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Andrade, Alequexandre Galvez de, Elaine Santos Ferreira, Lana Cristina de Almeida Silva, Thatiana Soares dos Santos et Nélio Fernando dos Reis. « Qualidade no Ensino a Distância : um conceito polissêmico ». Research, Society and Development 10, no 13 (3 octobre 2021) : e26101320910. http://dx.doi.org/10.33448/rsd-v10i13.20910.

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O ensino a distância (EAD) na educação superior tem crescido substancialmente no Brasil, para alguns trata-se de uma modalidade e para outros uma nova pedagogia com um novo campo de estudo, principalmente na educação de adultos. Este impulso do ensino a distância é marcado pelo crescimento tanto em instituições como de alunos por meio da ampliação de cursos e polos de apoio, democratizando o ensino. Desta forma, um aspecto que tem sido discutido e disputado no EAD é a qualidade, estudos demonstram que há equivalência na qualidade entre ensino presencial e a distância quando considerado as notas das avaliações para o ensino superior. O objetivo deste estudo foi identificar quais fatores estão ligados a qualidade no ensino a distância. Para isto, foi realizada uma análise bibliográfica seguindo procedimentos de seleção quanto a citação e análise dos especialistas para listar os artigos a serem avaliados, após este filtro selecionou-se a conclusão destes artigos e aplicou a análise de conteúdo por meio do uso do software Iramuteq. Os resultados indicam que a qualidade é um conceito polissêmico e esta relacionada a gestão, engajamento da equipe, corpo docente, corpo discente, avaliações institucionais, legislação, infraestrutura, gestão, tecnologias e suas aplicações.
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Souza, Gustavo Fernando Julião de. « Fenomenologia e raciocínio clínico em psiquiatria : o conceito de marcadores psicopatológicos ». Revista Psicopatologia Fenomenológica Contemporânea 2, no 2 (17 octobre 2013) : 3–31. http://dx.doi.org/10.37067/rpfc.v2i2.1033.

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O presente artigo corresponde ao produto final de múltiplas reflexões teóricas que se sucederam ao longo de quase vinte anos de supervisão de casos clínicos no ambulatório da Residência de Psiquiatria do Hospital das Clínicas da UFMG e, também, no decorrer de longa prática clínica em outros ambulatórios, hospitais e consultório privado por mais de trinta anos de trabalho diário. Dessa maneira, o autor propõe a utilização de um método de investigação semiológica, denominado por ele de fenomenológico-dinâmico, resultando em um ‘constructo’ teórico – no qual a personalidade pré-mórbida é componente importante – capaz de viabilizar hipóteses diagnósticas que se mostrem acertadas, precisas e detalhadas na prática clínica. Para ilustrar a utilidade prática do método proposto, apresenta quatro casos clínicos nos quais o utiliza e estabelece os conceitos de “morbus” primário e secundário, filtro ou prisma caracterológico e marcadores psicopatológicos. Além disso, cita e revisa outros conceitos teóricos estabelecidos em artigos anteriores, tais como transtorno ou estado psicoide.
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Figueiredo, Márcia Feijão de. « Ferramentas no julgamento avaliativo em ambiente web para buscas com vistas ao desenvolvimento de competência crítica em informação ». Revista Conhecimento em Ação 1, no 2 (19 mars 2017) : 110. http://dx.doi.org/10.47681/rca.v1i2.4915.

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Aponta novas questões informacionais geradas pelo aumento de uso da web, como o filtro e o estado de vigilância das ações dos usuários, com vistas a indução de resultados e recuperação dos perfis para fins econômicos. Descreve o conceito de competência crítica da informação como uma proposta acadêmica de uso das informações em ambientes virtuais. Aponta também os estudos de busca e recuperação da informação como uma ação anterior aos estudos de competência e como ferramenta de avaliação e validação os critérios de julgamento avaliativo qualidade da informação, autoridade cognitiva e a credibilidade. Ressalta que, diante de algoritmos e novas práticas empresariais de vigilância, é possível o desenvolvimento de novos critérios que abarquem os novos pressupostos práticos ou o aprimoramento dos critérios apresentados.
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Thèses sur le sujet "Concetti filtro"

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Sharshavina, Ksenia. « Nouveaux concepts de filtres spectraux ultra-sélectifs pour spectroscopie embarquée ». Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30264/document.

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Les filtres spectraux à réseaux résonants, ou GMRF (Guided-Mode Resonance Filters), sont une nouvelle génération de filtres à bande étroite et constituent une alternative très prometteuse aux filtres conventionnels multicouches Fabry-Pérot. Le pic de résonance d'un GMRF peut être très fin spectralement et de longueur d'onde de centrage accordable en fonction de l'angle d'incidence. Ces propriétés sont particulièrement importantes pour la spectroscopie. Les travaux antérieurs ont permis de mettre en œuvre une structure originale comportant deux réseaux 1D croisés. Les performances de ce filtre surpassent celles des filtres conventionnels par leur réponse spectrale subnanométrique, leur accordabilité, et leur capacité à s'affranchir de l'influence de la polarisation de l'onde incidente sous incidence oblique. Le but de ce travail est d'explorer les performances ultimes de ce type de dispositif en termes de résolution et taux de réjection, par une approche mêlant théorie, technologie et caractérisation. Nous présentons des résultats expérimentaux d'un filtre en réflexion indépendant de la polarisation, accordable sur 40 nm avec 8.3nm/° d'accordabilité, ayant une réflexion de 10-3 sur une plage de 90nm en dehors de la résonance et un facteur de qualité supérieur à 5000
Guided Mode Resonance Filters ( GMRF ) are a new generation of narrowband optical filters and are a very promising alternative to conventional multilayer Fabry-Perot filters. The resonance peak of GMRF can be spectrally extremely thin and with a centering wavelength tunable according to the angle of incidence of the light. These properties are particularly important for spectroscopy. Previous works have helped to implement an original structure with two 1D crossed gratings. The performance of this filter overpasses those of conventional filters in their spectral subnanometric response, tunability and their ability to overcome the influence of the polarization of the incident wave under oblique incidence. The aim of this work is to explore the final performances of such devices in terms of resolution and rejection rate, thanks to an approach combining theory, fabrication technology and characterization. We present experimental results of a polarization independent reflective filter, tunable over 40nm with a tunability of 8.3nm / °, having a reflection of 10-3 on a 90nm range outside the resonance and a quality factor over 5000
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Giacobini, Giulia. « Quando la possibilità filtra attraverso la volontà : esplorazione del concetto giapponese di MA ». Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8889/.

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La mia tesi si compone di tre capitoli e analizza il concetto giapponese di MA da diverse prospettive. Nel primo capitolo, “Il concetto giapponese di MA: un vuoto a rendere”, viene introdotta la tematica. Si procede dunque alla spiegazione della presenza di caratteri cinesi nella lingua giapponese e delle ragioni del dibattito nato tra gli studiosi in merito alla sua origine. Segue una panoramica sull’applicazione del MA ai vari ambiti della vita (architettura, cerimonia del the, arti visive, teatro, sport/arti marziali, dimensione quotidiana). Nel secondo capitolo “Speech is silver, silence is golden” il silenzio viene analizzato da un punto di vista culturale. A questo proposito viene presentato lo studio dell’antropologa Takie Sugiyama Lebra che ha individuato il silenzio come sintomo di onestà, espressione dell’applicazione della discrezione sociale, indice del grado di intimità tra le persone ed infine come forma di sfida e ribellione. Nel terzo ed ultimo capitolo, “Il silenzio è una cosa che suona per chi ascolta avidamente”, il silenzio viene invece analizzato da un punto di vista linguistico. Sulla base degli studi condotti da Yamada, Shigimetsu e Hosoda, la pausa viene dunque individuata come strumento per prendere la parola, feedback, modalità per cambiare eventualmente argomento ed infine come escamotage per evitare di dire di no.
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Rubin, Matthew Scott. « Microwave bandpass filters utilizing transversal and recursive signal flow concepts ». Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182458407.

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Mount, Mason B. « Microwave bandpass filters utilizing transversal and recursive signal flow concepts ». Ohio University / OhioLINK, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1182459287.

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Macé, Léopold. « Nouveaux concepts de nano-filtres infrarouges à l'échelle du pixel ». Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30184/document.

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Dans le domaine du proche infrarouge et du moyen infrarouge (3-10 µm), les besoins évoluent vers une plus grande complexité des fonctions optiques et un niveau d'intégration plus élevé des systèmes. Ceci est particulièrement vrai dans un contexte spatial ou aéronautique visant à l'observation de la terre, où l'on cherche simultanément à accroître le nombre de bandes spectrales acquises et à miniaturiser les systèmes d'observation. Cela se traduit notamment par une pixellisation des filtres afin que ceux-ci soient intégrés dans une matrice réalisant plusieurs fonctions optiques. Or, les méthodes traditionnelles de fabrication de filtres optiques utilisant des empilements de couches minces n'ont pas démontré leur capacité à répondre au besoin de pixellisation dans l'infrarouge. C'est pourquoi il est nécessaire d'étudier de nouveaux concepts de filtrages issus du domaine de la photonique permettant de s'affranchir de ces limitations. Les "zero-contrast gratings" (ZCG),qui constituent une sous-catégorie des réseaux résonnants, ont démontré leur capacité à réaliser des filtres en transmission accordables de grande efficacité dans le proche-infrarouge, tout en ayant une structure très simple. Néanmoins, leur faible bande passante et leur tolérance angulaire réduite en limitent la pertinence pour des applications pixellisées dans le moyen-infrarouge. Nous présentons dans cette thèse diverses structures basées sur ce même concept de ZCG. D'une part nous introduisons des filtres 1D doublement corrugués de bande passante variant entre 1 et 200 nm, dont les tailles de pixels accessibles sont de l'ordre de 100 µm, accordables sur une bande de 200 nm. D'autre part, nous avons développé un nouveau concept de filtre, dit "ZCG TE/TM" dont le fonctionnement permet de dépasser une limitation très restrictive des ZCGs conventionnels pour le choix des matériaux. La fabricabilité de ces dispositifs a été démontrée lors d'opérations technologiques menées en salle blanche. Un premier démonstrateur de filtre 1D doublement corrugué été caractérisé optiquement
In the near-infrared (NIR) and mid-infrared (MIR) spectral domains (3-10 µm), requirements and needs evolve toward more complex optical functions and highly-integrated systems. This is especially relevant in the context of space and aeronautics applications for earth observation, where the aim is to increase the number of acquired spectral bands while simultaneously reducing the device footprint. These requirements translate into a pixelization of the filters so that they can be integrated into a mosaic which also performs the spatial filtering and different spectral functions. As of today, conventional thin films filter technologies haven't been shown to achieve this goal. As a result, different filtering concepts originating from the field of photonics which could overcome these limitations must be investigated. "Zero-contrast gratings" (ZCG) are a kind of guided-mode resonance filters that have proved to implement efficient tunable transmission filters in the MIR, while having a very simple structure. Nevertheless, their narrow transmission linewidth and weak angular acceptance hinder their applicability for pixelated applications in the MIR. We present in this work several structures based on the ZCG concept. On the one hand, we have introduced doubly-corrugated 1D filters with bandwidths ranging from 1 to 200 nm, allowing for 100 µm pixel sizes and tunable over a domain of 200 nm. On the other hand, we have shown a novel filtering concept, which we called "TE/TM ZCG". This new generation of ZCG is not bound by stringent material requirements inherent to conventionnal ZCGs. Their fabrica- bility have been demonstrated through cleanroom operations. A first doubly-corrugated 1D filter has been fabricated and characterized optically
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Kählert, Stefan [Verfasser]. « Frequency agile filter concept for wireless whitespace receivers / Stefan Kählert ». Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1065418280/34.

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Manfrim, Amanda Liz Pacífico. « O conceito de estabilizabilidade fraca para sistemas lineares com saltos Markovianos ». Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-13092006-153315/.

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Este trabalho introduz os conceitos de controlabilidade fraca e estabilizabilidade fraca para sistemas lineares com parâmetros sujeitos a saltos Markovianos a tempo discreto. É, inicialmente, construída uma coleção de matrizes C que se assemelha às matrizes de controlabilidade de sistemas lineares deterministicos. Essa coleção de matrizes C nos permite definir um conceito de controlabilidade fraca, requerendo que elas sejam de posto completo, assim como introduzir um conceito de estabilizabilidade fraca, dual ao conceito de detetabilidade fraca encontrado na literatura de sistemas com saltos de Markov. Uma característica importante do conceito de estabilizabilidade fraca é a de generalizar o conceito de estabilizabilidade na média quadrática, anteriormente encontrado na literatura. O papel do conceito da estabilizabilidade fraca no problema de filtragem é investigado através de casos de estudo. Estes casos de estudo são desenvolvidos no contexto do filtro de Kalman com observação do parâmetro de Markov e sugerem que a estabilizabilidade fraca em conjunto com a detetabilidade na média quadrática garantem que o estimador seja estável na média quadrática.
This work introduces weak controllability and weak stabilizability concepts for discretetime Markov jump linear system. We introduce a collection of matrices C that resembles controllability matrices of deterministic linear systems. The collection of matrices C allows us to define a weak controllability concept by requiring that the matrices are full rank, as well as to introduce a weak stabilizability concept that is a dual of the weak detectability concept found in the literature of Markov jump systems. An important feature of the introduced concept is that it generalizes the previous concept of mean square stabilizability. The role that the weak stabilizability concept plays in the filtering problem is investigated via case studies. These case studies are developed in the context of Kalman filtering with observation of the Markov parameter, they suggest that weak stabilizability together with mean square stabilizability ensure that the state estimator is mean square stable.
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Cheng, Yan Ming. « Etude du concept source-filtre interactif pour la synthèse de la parole : analyse des voyelles nasales ». Grenoble INPG, 1986. http://www.theses.fr/1986INPG0085.

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Cheng, Yan Ming. « Etude du concept source-filtre interactif pour la synthèse de la parole analyse des voyelles nasales ». Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375966632.

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Ralaivola, Liva. « Modélisation et apprentissage de systèmes et de concepts dynamiques ». Paris 6, 2003. http://www.theses.fr/2003PA066277.

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Livres sur le sujet "Concetti filtro"

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Hamdy, Nadder A. Applied signal processing : Concepts, circuits, and systems. Boca Raton : Taylor & Francis, 2008.

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Erich, Fromm. Marx y su concepto del hombre : Karl Marx : manuscritos econo mico-filoso ficos. Me xico : Fondo de Cultura Econo mica, 2000.

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Kenneth, Jenkins William, dir. Advanced concepts in adaptive signal processing. Boston : Kluwer Academic Publishers, 1996.

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Liu, Wei. Wideband beamforming : Concepts and techniques. Chichester, West Sussex, U.K : Wiley, 2010.

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5

Locked inside. New York, N.Y : Dell Laurel-Leaf, 2001.

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6

Rahman, Zia-ur. Adaptive Filtering : Principles, Concepts and Applications. Nova Science Publishers, Incorporated, 2019.

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Rahman, Zia Ur. Adaptive Filtering : Principles, Concepts and Applications. Nova Science Publishers, Incorporated, 2019.

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Raol, Jitendra R., Girija Gopalratnam et Bhekisipho Twala. Nonlinear Filtering : Concepts and Engineering Applications. Taylor & Francis Group, 2017.

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Raol, Jitendra R., Girija Gopalratnam et Bhekisipho Twala. Nonlinear Filtering : Concepts and Engineering Applications. Taylor & Francis Group, 2017.

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Raol, Jitendra R., Girija Gopalratnam et Bhekisipho Twala. Nonlinear Filtering : Concepts and Engineering Applications. Taylor & Francis Group, 2017.

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Chapitres de livres sur le sujet "Concetti filtro"

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Keller, Reto B. « Filtering ». Dans Design for Electromagnetic Compatibility--In a Nutshell, 245–63. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-14186-7_15.

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AbstractIn EMC, filtering helps to minimize emissions of a product and increase the product’s immunity against electromagnetic interference. This chapter presents the concepts of determining the right filter type and ensuring the proper components are chosen regarding power dissipation, noise current type, and high-frequency behavior.Filters can be classified according to their attenuation in the frequency-domain: Low-pass filters High-pass filters Band-pass filters Band-stop filters or according to active components involved or not: Passive filters Active filters or according to the noise current type: Differential-mode noise filters Common-mode noise filters or according to the suppression of transients: ESD filters Burst filters Surge filters or according to the implementation in hardware or software: Analog filters (hardware) Digital filters (software) In this chapter, all the filter types listed above are explained in further detail.
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Dimopoulos, Hercules G. « Introduction to Filter Concepts ». Dans Analog Electronic Filters, 1–29. Dordrecht : Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2190-6_1.

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Dimopoulos, Hercules G. « Passive Filters : Basic Theory and Concepts ». Dans Analog Electronic Filters, 219–48. Dordrecht : Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2190-6_6.

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Willingham, Scott D., et Ken Martin. « Filter Function Approximation Concepts ». Dans Integrated Video-Frequency Continuous-Time Filters, 15–40. Boston, MA : Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2347-5_2.

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Jenkins, W. Kenneth, Andrew W. Hull, Jeffrey C. Strait, Bernard A. Schnaufer et Xiaohui Li. « Adaptive Polynomial Filters ». Dans Advanced Concepts in Adaptive Signal Processing, 237–77. Boston, MA : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4419-8658-0_5.

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Léa, Tenkeu Jeufack Yannick, Etienne Romuald Alomo Temgoua et Léonard Kwuida. « Filters, Ideals and Congruences on Double Boolean Algebras ». Dans Formal Concept Analysis, 270–80. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77867-5_18.

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Schobben, Daniel W. E. « An Efficient Adaptive Filter Implementation ». Dans Real-time Adaptive Concepts in Acoustics, 47–57. Dordrecht : Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0812-9_4.

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Makimoto, Mitsuo, et Sadahiko Yamashita. « Expanded Concept and Technological Trends in SIR ». Dans Microwave Resonators and Filters for Wireless Communication, 127–48. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04325-7_6.

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Nikam, Shankar Bhausaheb, et Suneeta Agarwal. « Gabor Filter-Based Fingerprint Anti-spoofing ». Dans Advanced Concepts for Intelligent Vision Systems, 1103–14. Berlin, Heidelberg : Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-88458-3_100.

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Maybeck, Peter S. « The Kalman Filter : An Introduction to Concepts ». Dans Autonomous Robot Vehicles, 194–204. New York, NY : Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4613-8997-2_15.

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Actes de conférences sur le sujet "Concetti filtro"

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Balasubramanian, K., et H. Angus Macleod. « Induced absorption in thin films ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.mdd7.

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Induced transmission filters with buried metal layers have been developed in the past to produce interesting filter characteristics. We have employed similar concepts to design filters that would show total absorption in 5-10-nm thick metal and alloy film. We report typical examples of such designs with intermetallic and semiconductor films and discuss potential applications, particularly in relation to thin film media for optical data storage.
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Zottis, Amanda Luiza, Felipe Augusto Gomes Zanoni, Gabriel Souza da Silva, Gabriel Zancan Tomadon, Giordanno Pietro Altoé Marcantonio, Guilherme Henrique Ramos, Giovana Miti Aibara Paschoal et al. « Desafio do Filtro : conceito e aplicação ». Dans IV Congresso Nacional dos Grupos PET de Engenharia Civil. Fortaleza - CE, Brazil : Galoa, 2017. http://dx.doi.org/10.17648/conpet-2017-60256.

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Mahlab, Uri, et Joseph Shamir. « Phase-only entropy optimized filter by simulated annealing ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tuc5.

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The recently introduced concept of entropy optimized filters1 led to optical correlators of very good discrimination even in the presence of substantial noise. Various numerical procedures were found to be quite effective in the generation of regular holographic filters. However, the convergence of most of these algorithms was inadequate for phase-only filters due to the fast variations in these filters. In this work we show that procedures of simulated annealing are suitable also for the generation of phase-only filters leading to high quality performance. To improve the process of filter generation, electrooptic architectures are proposed for their implementation.
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Cuvelier, L., et M. D. Belcher. « A New Air Filtration System Concept for Space Limited Applications and Retrofits ». Dans ASME 1990 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/90-gt-177.

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The need for adequate inlet air treatment for combustion gasturbines has been recognized for years. The benefit of high efficiency air filtration, mainly in high ambient dust environments does not require any further discussion as the shortfalls of the multi-stage static systems are known. The size of the conventional automatic pulse jet self cleaning airfilters is a serious handicap when considering upgrading/retrofitting outdated static filter systems or for any application in very limited spaces. The new filter concept is described. It is an automatic Pulse Jet high efficiency self cleaning filter in which the major limiting factor of the previous design has been turned into an upgrading feature; the incoming air velocity direction basically eliminates the well-known pulsed dust re-entrainment. Other key design characteristics allow for capitalizing upon the reduced foot print area and justify the technical and economical replacement of the out-of-date filters with no or minor changes to the support structure. The system can in certain cases be incorporated within the old filterhouse itself. Additional interesting features are discussed, supported by laboratory test results and field data from units operating in various environmental conditions.
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Dickey, Fred M., et K. Terry Stalker. « Binary phase-only filters : implications of bandwidth and uniqueness on performance ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.wk3.

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The use of binary phase-only filter (BPOF) concepts in conjunction with recently developed spatial light modulator technology offers the potential for real-time image processing.1 Thus BPOFs have been suggested as a replacement for matched filters in pattern recognition problems.2 However, there are several design issues to be explored in using the BPOF. First, the standard BPOF design approach does not explicitly define the BPOF bandwidth. We define a figure of merit for BPOFs which references the signal-to-noise performance of matched filters and investigates the relationship of BPOF resolution and noise performance as a function of filter bandwidth. Second, since the standard BPOF is equivalent to a phase-only filter (POF) matched to only the even part of the reference image, its response is not unique. We discuss the consequences of image positivity on uniqueness and BPOF filter design. We develop a relationship between a two-channel configuration (to match both the even and odd parts of the reference) and the POF. We show that the two-channel configuration effectively reduces the uniqueness problem to that for POFs.
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Vaubert, Virginie, David P. Stinton, Chris Barra et Santosh Limaye. « Design and Initial Development of Monolithic Cross-Flow Ceramic Hot-Gas Filters ». Dans ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-320.

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Advanced, coal-fueled, power generation systems utilizing pressurized fluidized bed combustion (PFBC) and integrated gasification combined cycle (IGCC) technologies are currently being developed for high-efficiency, low emissions, and low-cost power generation. In spite of the advantages of these promising technologies, the severe operating environment often leads to material degradation and loss of performance in the barrier filters used for particle entrapment. To address this problem, LoTEC Inc., and Oak Ridge National Laboratory are jointly designing and developing a monolithic cross-flow ceramic hot-gas filter. The filter concept involves a truly monolithic cross-flow design that is resistant to delamination, can be easily fabricated, and offers flexibility of geometry and material make-up. During Phase I of the program, a thermo-mechanical analysis was performed to determine how a cross-flow filter would respond both thermally and mechanically to a series of thermal and mechanical loads. The cross-flow filter mold was designed accordingly, and the materials selection was narrowed down to Ca0.5Sr0.5Zr4P6O24 (CS-50) and 2Al2O3−3SiO2 (mullite). A fabrication process was developed using gelcasting technology and monolithic cross-flow filters were fabricated. The program focuses on obtaining optimum filter permeability and testing the corrosion resistance of the candidate materials.
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Setty, S. « Ideas and concepts for the automation of analogue filters using qualitative reasoning ». Dans IEE 15th SARAGA Colloquium on Digital and Analogue Filters and Filtering Systems. IEE, 1995. http://dx.doi.org/10.1049/ic:19951451.

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Johlen, Dietmar, Peter Klose, Andreas Ewald et Ernst Brinkmeyer. « Non-reflecting narrow-band fiber optical Fabry-Perot transmission filter ». Dans Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides. Washington, D.C. : Optica Publishing Group, 1997. http://dx.doi.org/10.1364/bgppf.1997.bsuc.5.

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Tilted Bragg gratings have been used for intermodal conversion in dual-mode fibers [1]. In this paper we demonstrate that such gratings in combined single-mode/dual mode structures are attractive for optical filter design. In particular, this concept is used here to realize narrowband Fabry-Perot transmission filters which - unlike ordinary FP-resonators - do not reflect the incident light at either side of the transmission peak.
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Cagna, M., et M. Boehle. « Application of CFD Methods for the Simulation of the Flow Through a Filter in Dependency of the Operating Time ». Dans ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31101.

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Filters are playing an important role in process engineering, chemical engineering as well as in many machineries like gas turbines, air conditioners or cars. At present it is possible to calculate the flow through a filter and predict the average pressure loss of the flow for the initial state of the filter medium. In the present paper a pragmatic procedure is introduced, which makes it possible to consider the deposition of dust onto the filter and the influence on the flow implied with it. For the application of the method the commercial CFD-Code FLUENT is used. The reasonability of the concept is shown by regarding the characteristic time scales of the flow and the dust deposition. The method is used to simulate the flow through a filter within a quadratic tube in dependence of the operating time.
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Du, Jianxing, et Caiyuan Deng. « Construction and Lean Management of Filters Cycle Life Cycle in Nuclear Safety-Related Ventilation Systems ». Dans 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-92076.

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Abstract Nuclear safety-related ventilation systems of nuclear power plants are equipped with a large number of particle filters an d iodine filters to filter radioactive dust, aerosols and gaseous radioactive iodine. These disposable nuclear grade ventilation filters have high unit price and large annual consumption. The used filters as low and medium level radioactive waste, due to the inability to achieve reuse and effective capacity reduction treatment, resulting in a continuous shortage of low- and medium-level radioactive storage capacity in nuclear power plants. Post-processing is mainly compression temporary storage, which not only has a high cost of disposal and storage, but also has a great impact on the environment, but also has a serious waste of metal, activated carbon and other resources, which is a common problem in the industry. In recent years, in response to the national principle requirements of reducing nuclear radioactive waste and carrying out recycling, Daya Bay Nuclear Power has creatively put forward the concept of rebuilding the whole life cycle of nuclear ventilation filters on the basis of absorbing the experience of the same industry. Through the development and use of a full series of nuclear-grade reuse ventilation filters and related recycling technologies and equipment, and the lean management of the whole life process of nuclear-grade ventilation filters, the transition of nuclear-level ventilation filter from original extensive one-off life cycle management to recycling and lean life cycle management has been realized in Daya Bay Nuclear Power Base. It has embarked on a road of conservation, recycling and sustainable development.
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Rapports d'organisations sur le sujet "Concetti filtro"

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Baader, Franz, et Ralf Küsters. Matching Concept Descriptions with Existential Restrictions. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.93.

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Matching of concepts with variables (concept patterns) is a relatively new operation that has been introduced in the context of description logics, originally to help filter out unimportant aspects of large concepts appearing in industrial-strength knowledge bases. Previous work has concentrated on (sub-)languages of CLASSIC, which in particular do not allow for existential restrictions. In this work, we present sound and complete decision algorithms for the solvability of matching problems and for computing sets of matchers for matching problems in description logics with existential restrictions.
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Baader, Franz, et Ralf Küsters. Matching Concept Descriptions with Existential Restrictions. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.93.

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Matching of concepts with variables (concept patterns) is a relatively new operation that has been introduced in the context of description logics, originally to help filter out unimportant aspects of large concepts appearing in industrial-strength knowledge bases. Previous work has concentrated on (sub-)languages of CLASSIC, which in particular do not allow for existential restrictions. In this work, we present sound and complete decision algorithms for the solvability of matching problems and for computing sets of matchers for matching problems in description logics with existential restrictions.
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Kumar, B. V. Advanced Concepts in Distortion-Invariant Phase-Only Filter Design. Fort Belvoir, VA : Defense Technical Information Center, juillet 1992. http://dx.doi.org/10.21236/ada258691.

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Dillmann, H. G., et H. Pasler. A low pressure filter system for new containment concepts. Office of Scientific and Technical Information (OSTI), février 1995. http://dx.doi.org/10.2172/95675.

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Chakravartty, A. C. HEPA filter leaching concept validation trials at the Idaho Chemical Processing Plant. Office of Scientific and Technical Information (OSTI), avril 1995. http://dx.doi.org/10.2172/114015.

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Tao, Yong, et Murray Moore. FY 2021 Filter Test for TRU Waste Drum POC Proof-of-Concept Unit. Office of Scientific and Technical Information (OSTI), octobre 2021. http://dx.doi.org/10.2172/1826493.

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Mizrach, Amos, Michal Mazor, Amots Hetzroni, Joseph Grinshpun, Richard Mankin, Dennis Shuman, Nancy Epsky et Robert Heath. Male Song as a Tool for Trapping Female Medflies. United States Department of Agriculture, décembre 2002. http://dx.doi.org/10.32747/2002.7586535.bard.

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This interdisciplinaray work combines expertise in engineering and entomology in Israel and the US, to develop an acoustic trap for mate-seeking female medflies. Medflies are among the world's most economically harmful pests, and monitoring and control efforts cost about $800 million each year in Israel and the US. Efficient traps are vitally important tools for medfly quarantine and pest management activities; they are needed for early detection, for predicting dispersal patterns and for estimating medfly abundance within infested regions. Early detection facilitates rapid response to invasions, in order to contain them. Prediction of dispersal patterns facilitates preemptive action, and estimates of the pests' abundance lead to quantification of medfly infestations and control efforts. Although olfactory attractants and traps exist for capturing male and mated female medflies, there are still no satisfactorily efficient means to attract and trap virgin and remating females (a significant and dangerous segment of the population). We proposed to explore the largely ignored mechanism of female attraction to male song that the flies use in courtship. The potential of such an approach is indicated by studies under this project. Our research involved the identification, isolation, and augmentation of the most attractive components of male medfly songs and the use of these components in the design and testing of traps incorporating acoustic lures. The project combined expertise in acoustic engineering and instrumentation, fruit fly behavior, and integrated pest management. The BARD support was provided for 1 year to enable proof-of-concept studies, aimed to determine: 1) whether mate-seeking female medflies are attracted to male songs; and 2) over what distance such attraction works. Male medfly calling song was recorded during courtship. Multiple acoustic components of male song were examined and tested for synergism with substrate vibrations produced by various surfaces, plates and loudspeakers, with natural and artificial sound playbacks. A speaker-funnel system was developed that focused the playback signal to reproduce as closely as possible the near-field spatial characteristics of the sounds produced by individual males. In initial studies, the system was tasted by observing the behavior of females while the speaker system played songs at various intensities. Through morning and early afternoon periods of peak sexual activity, virgin female medflies landed on a sheet of filter paper at the funnel outlet and stayed longer during broadcasting than during the silent part of the cycle. In later studies, females were captured on sticky paper at the funnel outlet. The mean capture rates were 67 and 44%, respectively, during sound emission and silent control periods. The findings confirmed that female trapping was improved if a male calling song was played. The second stage of the research focused on estimating the trapping range. Initial results indicated that the range possibly extended to 70 cm, but additional, verification tests remain to be conducted. Further studies are planned also to consider effects of combining acoustic and pheromonal cues.
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