Academic literature on the topic 'Schéma passif'
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Journal articles on the topic "Schéma passif":
1
Veland, Reidar. "Une construction dite ne pas exister en français moderne: le passif suivi d'un infinitif nu." Journal of French Language Studies 8, no. 1 (March 1998): 97–113. http://dx.doi.org/10.1017/s0959269500000582.
Abstract:
AbstractOn se propose, dans cet article, de montrer que l'expansion d'un passif morphologique par un syntagme infinitif sans terme introducteur aboutit, en français moderne, à une construction doublement problématique.Dans le cas des verbes de perception, c'est un problème prescriptif qui se pose, puisque la passivation de la construction accusativus cum infintivo, stratégie de thématisation optimale dans certains cas, est critiquée par la grammaire traditionnelle à tendance normative.S'agissant des verbes dont le schéma transitif ne comporte pas de proposition infinitive, la construction ‘passif + infinitif nu’, amplement attestée par des occurrences contemporaines, pose un problème d'analyse syntaxique. La solution qu'en propose cet article s'appuie sur un principe ‘triangulaire’ inspire de l'explication qui a été avancée pour rendre compte de la passivation de verbes sans objet direct manifeste comme obéir.
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Fedorova, Liudmila L'vovna. "Языковой стиль времени (на материале современной прессы и авторских текстов В. Шендеровича и Земфиры)." Chroniques slaves 2, no. 1 (2006): 69–84. http://dx.doi.org/10.3406/chros.2006.868.
Abstract:
<i>Le style discursif de notre temps étude des textes de la presse et d’auteurs populaires, V. Chenderovitch et Zemphira </i> Le discours publiciste de la Russie contemporaine appelle à la compétence culturelle et linguistique du lecteur de masses, par laquelle se représente l’image linguistique du monde - image populaire mais tout de même pas «naïve». Elle puise dans les modèles qui sont propres aux diverses couches de la conscience linguistique et qui forment un assemblage multiple. Ce sont d’abord des éléments représentatifs de l’esprit national (proverbes, locutions figées, bons mots) et aussi des exemples tirés des œuvres classiques russes (citations ouvertes et latentes), ce sont aussi des images et des locutions figées de l’époque soviétique, auxquelles il faut ajouter la couche soviétique «à l’envers» - celle du milieu criminel, et puis ce sont les éléments spécifiques du jargon «nouveau russe». Le langage «nouveau russe» tel qu’on se le représente est constitué du mélange intentionnel de ces diverses couches. Le choix de la stylistique du texte est déterminé au bout du compte par la situation communicative : les relations entre l’auteur ou journaliste, et le lecteur. Le caractère de ces relations s’est modifié ces dernières années. Si dans la presse officielle soviétique l’auteur occupait une position distante (voir schéma ci-dessous : A1), celle d’une instance supérieure, autorisée, qui instruit et dirige, en laissant aux masses des lecteurs un rôle passif, solidaire à l’unisson (L1), maintenant la presse préfère un autre modèle de relations. Par exemple, Moskovskiy komsomolets impose un contact solidaire : l’auteur et le lecteur ont des situations (A2, L2) à peu près équivalentes dans la société désintégrée, et de plus, le lecteur est inclus dans le cercle des proches de l’auteur, ceux qu’on appelle en russe «les siens» - c’est-à-dire ceux qui ont une vision du monde et une compétence communicative comparables à celles de l’auteur. Moskovskiy komsomolets, Sobesednik choisissent le style parlé, avec une intonation confidentielle, qui est adressée aux «siens», à ceux qui sont capable de comprendre les allusions et les sens latents. On y trouve toujours place pour la stylisation et le jeu. Cette analyse peut être étendue à des textes d’auteurs contemporains, populaires chacun dans son domaine : Victor Chenderovitch pour ses satires, Zemphira pour ses chansons. Le style de notre temps se présente toujours comme le jeu des images et des formes propres aux diverses couches de la conscience nationale linguistique. Les enfants qui font leurs premiers pas en littérature choisissent de jouer avec les images contemporaines dans les formes traditionnelles, mais ils trouvent pour les sujets sérieux des paroles vraies.
3
Shrestha, L. J., M. P. Devkota, and B. K. Sharma. "Tree regeneration in sacred groves of Kathmandu valley, Nepal." Ecoprint: An International Journal of Ecology 22 (September 22, 2016): 29–38. http://dx.doi.org/10.3126/eco.v22i0.15468.
Abstract:
Population structure and regeneration status of tree species were studied in two sacred groves of Kathmandu valley, Pashupati (PSG) and Bajrabarahi (BSG) by sampling in concentric circular plots of 20 m radius. The dominant tree species of PSG are Schima wallichii, Pyrus pashia, Myrsine capitellata, Persea odoratissima and Quercus glauca, where as those in BSG are Neolitsea cuipala, Castanopsis indica,, Choerospondias axillaris, Schima wallichii and, Myrsine capitellata. On the basis of biomass removal, tree cutting, livestock and wildlife grazing and other anthropogenic activities, disturbance levels were classified as undisturbed, least disturbed, moderately disturbed and highly disturbed. The highest number of seedlings, saplings and adults were found in the least disturbed areas of the studied groves showing good to fair regeneration of tree species. In this study Pyrus pashia, Myrsine capitellata, Castanopsis indica, Neolitsea cuipala are found in good and fair state of regeneration. Management authority should address the prevalent factors affecting natural regeneration of the tree species.ECOPRINT 22: 29-38, 2015
4
Kinoshita, Shin, Yoshihiko Nomura, and Yoshiaki Kashino. "MoP-31 COMPARATIVE STUDY OF ACTIVE AND PASSIVE MOTION LEARNING SCHEME WITH HAPTIC INFORMATION." Proceedings of JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment : IIP/ISPS joint MIPE 2015 (2015): _MoP—31–1_—_MoP—31–3_. http://dx.doi.org/10.1299/jsmemipe.2015._mop-31-1_.
5
Sampognaro, Giuseppe. "Il burnout del terapeuta: il cortocircuito emotivo del guaritore ferito." QUADERNI DI GESTALT 36, no. 1 (July 2023): 29–49. http://dx.doi.org/10.3280/gest2023-001003.
Abstract:
L'articolo intende illustrare i fattori di rischio burnout a cui il terapeuta è esposto. Soprat-tutto, focalizza una particolare situazione ricorrente nell'esperienza del clinico: il cortocircuito emotivo che nasce dall'incontro con pazienti che presentano una marcata affinità con lo sfondo del terapeuta, e che pertanto suscitano in lui particolare risonanza. Per prevenire il burnout, è auspicabile che il terapeuta abbandoni lo schema narcisistico del farsi carico della salvezza del paziente; che accetti la propria fallibilità e che sia disposto a met-tere al servizio dell'Altro le proprie paure e la propria fragilità. L'articolo si conclude con la presentazione di un esempio clinico utilizzando lo schema de-scrittivo dei "passi di danza" e con la proposta di favorire la spontaneità del terapeuta, la sua capacità di entrare pienamente in relazione con i pazienti e l'accettazione della sua vulnerabilità.
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Puglisi, Melania. "Eros e linguaggio in Se una notte d'inverno un viaggiatore." Cuadernos de Filología Italiana 28 (July 15, 2021): 379–403. http://dx.doi.org/10.5209/cfit.72734.
Abstract:
Quanto e in che modo l’eros informa la scrittura calviniana? L'articolo propone un approfondimento nuovo e originale sul tema, toccato finora in modo complessivo solo in Gabriele 1994, e lo fa in modo interdisciplinare, secondo due prospettive: quella letteraria e quella linguistica. L’analisi si concentra su Se una notte d’inverno un viaggiatore, in particolare sulla scena erotica del romanzo, caratterizzata dalla descrizione del sesso come lettura del corpo. L’articolo mostra come, sia sul piano letterario sia su quello linguistico, il romanzo sia pervaso dall’erotismo in modo più profondo di quanto si creda. Ciò si rileva, per fare qualche esempio, in diversi passi che comunicano tra loro a distanza, in domande a cui si dà risposta dopo qualche pagina, nelle ripetizioni di parole chiave. La struttura stessa dei capitoli, così come la successione degli eventi, segue uno schema che sembra trovare una ragion d’essere nella tematica erotica. L’autore veicola il proprio pensiero sull’erotismo anche attraverso le peculiari strategie linguistiche che adotta e che sembrano essere la conseguenza naturale della sua teoria sulla difficile rappresentabilità dell’eros in letteratura.
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Kobayashi, Hiromichi, and Takauki Aoki. "615 Turbulence Simulation of Passive Scalar with IDO Scheme." Proceedings of The Computational Mechanics Conference 2008.21 (2008): 273–74. http://dx.doi.org/10.1299/jsmecmd.2008.21.273.
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Prihantoro, Prihantoro. "Current Implementation and Future Prospects of Santi-Morf V.1.0." Ranah: Jurnal Kajian Bahasa 10, no. 2 (December 27, 2021): 411. http://dx.doi.org/10.26499/rnh.v10i2.4189.
Abstract:
SANTI-Morf (Prihantoro, 2021) is a new morphological analyser for Indonesian. In SANTI-Morf annotation scheme (Prihantoro, 2019), morpheme tokens are linked to their annotations. The tokens are presented in their orthographic and citation forms to allow (allo)morph or morpheme-based searches. Users can also perform retrievals on the basis of formal and functional morphological criteria as SANTI-Morf tagset encodes the analyses of morphemes’ forms (e.g. roots, clitics, affix type) and functions (e.g. passive voice, active voice, adjective degrees, etc.). Currently, the scheme is implemented in Nooj (Silberztein, 2003), a linguistic development environment. It enables users to index and annotate Indonesian texts in their local PC, and later perform searches based on morphological criteria and or tokens defined by the SANTI-Morf scheme. AbstrakSANTI-Morf (Prihantoro, 2021) adalah sebuah program analisis morfologi terbaru untuk bahasa Indonesia. Dalam skema anotasi SANTI-morf (Prihantoro, A new tagset for morphological analysis of Indonesian, 2019), setiap token morfem terhubung dengan anotasinya. Token-token ini direpresentasikan dalam bentuk ortografis dan bentuk sitasi sehingga memungkinkan pengguna untuk melakukan penelusuran berbasis (alo)morf atau morfem. Selain itu, pengguna juga bisa melakukan penelusuran berbasiskan bentuk atau fungsi morfem. Ini karena tagset analitik yang digunakan di SANTI-morf mencakup bentuk (di antaranya: akar, klitik, jenis afiksasi) dan fungsi (di antaranya: aktif, pasif, derajat ajektiva). Saat ini, SANTI-morf diimplementasikan menggunakan NooJ (Silberztein, 2003), sebuah program pengembangan aplikasi linguistik. Pengguna dapat mengindeks dan menganotasi teks berbahasa Indonesia di komputer mereka, dan selanjutnya melakukan penelusuran menggunakan kriteria morfologi dan skema tokenisasi yang digunakan di skema anotasi SANTI-morf.
9
Gilal, Faheem, Amjad Memon, Naeem Gilal, Rukhsana Gilal, and Ahsan Memon. "Enhancing Service Brand Passion Through Self-Congruity: The Moderating Role of Gender and Age." Central European Management Journal 30, no. 2 (June 15, 2022): 83–102. http://dx.doi.org/10.7206/cemj.2658-0845.76.
Abstract:
Purpose: Using congruity theory, triangular theory of love, gender schema theory, and generational cohort theory, this study aimed to examine the relationships between congruity types and consumers’ service brand passion, along with the moderation effect of gender (i.e. male vs. female customers) and age (i.e. young vs. older customers) in these relationships. Design/methodology/approach: A total of N=252 valid responses were collected from the customers of service brands (e.g. bus riders), and the theoretical model was tested using exploratory factor analysis (EFA), structural equation modeling (SEM), and moderation analysis techniques. Findings: After assessing four types of congruity, we discovered that the influence of brand use image congruity had the greatest impact on service brand passion, followed by brand user image congruity, and actual self-congruity. Our moderation variable of gender revealed that the effect of actual self-congruity is more essential in building service brand passion among male than female customers, whereas the effect of ideal self-congruity is more important among female than male customers. Similarly, the effect of ideal self-congruity is more essential for boosting service brand passion among young than older customers, while brand use image congruity better promotes service brand passion among older but not young customers. Implications: This study offers strategies for boosting service brand passion among male (vs. female) and young (vs. older) customers in emerging markets. Originality: This is the first study to look into the effects of congruity types on service brand passion, and it has given marketers a framework for targeting customers based on their gender and age.
10
Prabhu, L., and J. Srinivas. "A PARAMETRIC STUDY ON CONTROL OF FLOW SEPARATION OVER AN AIRFOIL IN INCOMPRESSIBLE REGIME." IIUM Engineering Journal 19, no. 1 (June 1, 2018): 270–88. http://dx.doi.org/10.31436/iiumej.v19i1.784.
Abstract:
This paper presents the effects of airfoil geometry on flow separation behavior and obtains the transition patterns at a specific angle of attack. A strong adverse pressure gradient field is observed at the leading edge of the airfoil, and it results in a flow detachment. Leading edge flow separation is studied along with the variation of skin friction coefficient over the airfoil. Novelty in the approach is the development of a hybrid control scheme to delay the flow separation with blowing/suction of air (termed active control) over the airfoil together with the tapping of flow from the pressure side as in a classical passive control procedure. The active controller delays the flow separation, while the passive controller is used to reduce the drag coefficient significantly and increases the total performance of an airfoil. The effectiveness of these controls is examined by varying the control parameters including blowing/suction velocity, the position of the slot in terms of percentage of chord and size of the slot. All the numerical simulations are carried out using ANSYS-Fluent software. A surrogate model is also developed to predict the aerodynamic characteristics conveniently without much computational effort. The outcome of this study reveals that the blowing/suction velocity has a higher influence in delaying the flow separation. ABSTRAK: Kertas ini membentangkan tentang kesan geometri aerofoil pada perubahan pemisah aliran udara dan memperoleh bentuk peralihan pada darjah yang tepat. Terdapat tekanan kuat yang tidak sesuai pada kawasan kecerunan di hujung hadapan permukaan aerofoil, dan ini menyebabkan aliran udara terpisah. Pemisah aliran udara pada hujung hadapan ini dikaji bersama koefisien geseran pada permukaan aerofoil. Pendekatan baru pada kaedah ini adalah berkaitan pembangunan skim kawalan hibrid bagi melengahkan aliran pemisah udara melalui tiupan/sedutan udara (kawalan aktif) ke atas aerofoil bersama ketukan pada aliran dari tepi tekanan seperti mana prosedur klasik kawalan pasif. Kawalan aktif ini melengahkan aliran pemisah udara, sebaliknya kawalan pasif telah digunakan bagi mengurangkan koefisien penangguhan dengan ketara dan menambahkan jumlah prestasi aerofoil. Keberhasilan kawalan-kawalan ini dikaji dengan mengubah parameter kawalan termasuk kelajuan tiupan/sedutan udara, posisi slot berdasarkan peratusan garis temu dan saiz slot. Semua simulasi-simulasi numerikal ini dijalankan menggunakan perisian Ansys-Fluent. Model pengganti turut dibangunkan untuk menjangka ciri-ciri aero-dinamik dengan mudah tanpa usaha pengiraan yang banyak. Keputusan kajian ini mendedahkan tentang kelajuan tiupan/sedutan udara berpengaruh besar dalam melambatkan pemisahan aliran udara.
Dissertations / Theses on the topic "Schéma passif":
1
Mrad, Imed. "La méthode du recuit simulé pour la synthèse automatique de schéma électrique équivalent : Application à la modélisation de composant et à l'adaptation à large bande." Châtenay-Malabry, Ecole centrale de Paris, 1997. http://www.theses.fr/1997ECAP0588.
Abstract:
Les méthodes stochastiques d'optimisation globale ont fait preuve d'une plus grande performance sur certains problèmes que sur d'autres. La méthode que nous avons choisie comme outil d'optimisation est la méthode du recuit simule : c'est une méthode issue de la thermodynamique statistique, qui a montré son efficacité sur des fonctions analytiques complexes, comme les fonctions de Rosenbrock à 100 variables, Shekel à 4 variables et Zakharov à 100 variables. Grâce à un couplage entre un simulateur de circuits linéaires et le recuit simulé, nous avons pu résoudre non seulement les problèmes d'optimisation combinatoire mais aussi ceux d'optimisation à variables continues, notamment la caractérisation des modèles de composants électroniques. Il s'agit de déterminer, à partir de données expérimentales caractérisant le composant, les valeurs des paramètres d'un modèle de composant électronique et aussi sa topologie. Nous avons d'abord effectué la caractérisation de modèle de composant passifs, notamment un modèle d'inductance MMIC de THOMSON-CSF. Puis, nous nous sommes intéressés aux modèles de composants actifs, en particulier un modèle de transistor bipolaire. Nous avons ensuite procédé à la recherche de la topologie des modèles de composant par simplification d'une structure complexe jusqu'a l'aboutissement d'une structure simple. Cette simplification est basée sur deux méthodes, soit la comparaison des impédances, soit la technique des moyennes glissantes. Elle a nécessité la mise au point d'une variante du recuit simulé, permettant la recherche des paramètres dans un domaine de grande amplitude (plus de 10 décades) : le recuit simulé logarithmique. La recherche de la topologie a permis l'ouverture sur un autre domaine d'application : celui de l'adaptation à large bande. Dans ce cas, la connaissance de la topologie du correcteur à insérer entre le générateur et la charge est nécessaire afin de maximiser le gain de transfert en puissance.
2
Lai, Dac Kien. "Contribution à l'Optimisation du Dimensionnement de Composants Passifs Intégrés pour l'Electronique de Puissance." Phd thesis, Université de Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00567450.
Abstract:
Suite à la tendance de miniaturisation des convertisseurs d'électronique de puissance, un type de composant passif hybride mariant trois composants conventionnels y compris une inductance, un condensateur et un transformateur est étudié au G2Elab depuis 2001. Ce composant baptisé LCT donne plusieurs avantages tant en terme d'intégration qu'en performance. Pourtant, le dimensionnement classique des composants passifs ne garantisse pas de résultats optimaux pour les composant LCT. En contexte d'optimiser du dimensionnement des ces composants, cette thèse propose une nouvelle approche. L'optimisation se base tout d'abord sur une modélisation électrodynamique qui est quand à-t-elle basé sur la méthode du schéma équivalent des plaques déjà développé au G2Elab, ensuite sur une modélisation thermique analytique des composant magnétique planar. L'outil d'optimisation du dimensionnement permet de minimiser le volume des composants LCT sous une contrainte principale de la thermique. Les travaux expérimentaux constituent un moyen important pour la validation des modèles développés.
3
Akhavanfoomani, Aria. "Derivative-free stochastic optimization, online learning and fairness." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAG001.
Abstract:
Dans cette thèse, nous étudions d'abord le problème de l'optimisation d'ordre zéro dans le cadre actif pour des fonctions lisses et trois classes différentes de fonctions : i) les fonctions qui satisfont la condition de Polyak-Łojasiewicz, ii) les fonctions fortement convexes, et iii) la classe plus large des fonctions non convexes fortement lisses.De plus, nous proposons un nouvel algorithme basé sur la randomisation de type l1, et nous étudions ses propriétés pour les fonctions convexes Lipschitz dans un cadre d'optimisation en ligne. Notre analyse est due à la dérivation d'une nouvelle inégalité de type Poincar'e pour la mesure uniforme sur la sphère l1 avec des constantes explicites.Ensuite, nous étudions le problème d'optimisation d'ordre zéro dans les schémas passifs. Nous proposons une nouvelle méthode pour estimer le minimiseur et la valeur minimale d'une fonction de régression lisse et fortement convexe f. Nous dérivons des limites supérieures pour cet algorithme et prouvons des limites inférieures minimax pour un tel cadre.Enfin, nous étudions le problème du bandit contextuel linéaire sous contraintes d'équité où un agent doit sélectionner un candidat dans un pool, et où chaque candidat appartient à un groupe sensible. Nous proposons une nouvelle notion d'équité qui est pratique dans l'exemple susmentionné. Nous concevons une politique avide qui calcule une estimation du rang relatif de chaque candidat en utilisant la fonction de distribution cumulative empirique, et nous prouvons sa propriété optimaleIn this thesis, we first study the problem of zero-order optimization in the active setting for smooth and three different classes of functions: i) the functions that satisfy the Polyak-Łojasiewicz condition, ii) strongly convex functions, and iii) the larger class of highly smooth non-convex functions.Furthermore, we propose a novel algorithm that is based on l1-type randomization, and we study its properties for Lipschitz convex functions in an online optimization setting. Our analysis is due to deriving a new Poincar'e type inequality for the uniform measure on the l1-sphere with explicit constants.Then, we study the zero-order optimization problem in the passive schemes. We propose a new method for estimating the minimizer and the minimum value of a smooth and strongly convex regression function f. We derive upper bounds for this algorithm and prove minimax lower bounds for such a setting.In the end, we study the linear contextual bandit problem under fairness constraints where an agent has to select one candidate from a pool, and each candidate belongs to a sensitive group. We propose a novel notion of fairness which is practical in the aforementioned example. We design a greedy policy that computes an estimate of the relative rank of each candidate using the empirical cumulative distribution function, and we proved its optimal property
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Lai, Dac Kien. "Contribution à l’optimisation du dimensionnement de composants passifs intégrés pour l’électronique de puissance." Grenoble INPG, 2010. https://hal.science/tel-00567450.
Abstract:
Suite à la tendance de miniaturisation des convertisseurs d'électronique de puissance, un type de composant passif hybride mariant trois composants conventionnels y compris une inductance, un condensateur et un transformateur est étudié au G2Elab depuis 2001. Ce composant baptisé LCT donne plusieurs avantages tant en termes d'intégration qu'en performance. Pourtant, le dimensionnement classique des composants passifs ne garantit pas de résultats optimaux pour les composants LCT. En contexte d'optimiser le dimensionnement de ces composants, cette thèse propose une nouvelle approche. L'optimisation se base tout d'abord sur une modélisation électrodynamique qui est, quant à elle, basée sur la méthode du schéma équivalent des plaques déjà développé au G2Elab, ensuite sur une modélisation thermique analytique des composants magnétiques planar. L'outil d'optimisation du dimensionnement permet de minimiser le volume des composants LCT sous une contrainte principale de la thermique. Les travaux expérimentaux constituent un moyen important pour la validation des modèles développésDue to the trend of integration in power electronics, a hybrid device combining three conventional passive components including an inductor, a capacitor and a transformer has been studied at G2Elab since 2001. This component called LCT provides both advantages in size reduction and performance. However, classical design methods do not guarantee optimal results. Therefore this thesis proposes a new optimization approach. The optimization firstly base on an electromagnetic modeling developped from the Lumped Element Equivalent Circuit (LEEC) method that had already studied at G2Elab, then on an analytical thermal modeling. The design optimization tool can minimize the volume of LCT components in subjecting to principal thermal constraint. Experimental works is essential manner to validate these developed models
5
Jobic, Yann. "Numerical approach by kinetic methods of transport phenomena in heterogeneous media." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4723/document.
Abstract:
Les phénomènes de transport en milieux poreux sont étudiés depuis près de deux siècles, cependant les travaux concernant les milieux fortement poreux sont encore relativement peu nombreux. Les modèles couramment utilisés pour les poreux classiques (lits de grains par exemple) sont peu applicables pour les milieux fortement poreux (les mousses par exemple), un certain nombre d’études ont été entreprises pour combler ce manque. Néanmoins, les résultats expérimentaux et numériques caractérisant les pertes de charge dans les mousses sont fortement dispersés. Du fait des progrès de l’imagerie 3D, une tendance émergente est la détermination des paramètres des lois d’écoulement à partir de simulations directes sur des géométries reconstruites. Nous présentons ici l’utilisation d’une nouvelle approche cinétique pour résoudre localement les équations de Navier-Stokes et déterminer les propriétés d’écoulement (perméabilité, dispersion, ...)A novel kinetic scheme satisfying an entropy condition is developed, tested and implemented for the simulation of practical problems. The construction of this new entropic scheme is presented. A classical hyperbolic system is approximated by a discrete velocity vector kinetic scheme (with the simplified BGK collisional operator), but applied to an inviscid compressible gas dynamics system with a small Mach number parameter, according to the approach of Carfora and Natalini (2008). The numerical viscosity is controlled, and tends to the physical viscosity of the Navier-Stokes system. The proposed numerical scheme is analyzed and formulated as an explicit finite volume flux vector splitting (FVS) scheme that is very easy to implement. It is close in spirit to Lattice Boltzmann schemes, but it has the advantage to satisfy a discrete entropy inequality under a CFL condition and a subcharacteristic stability condition involving a cell Reynolds number. The new scheme is proved to be second-order accurate in space. We show the efficiency of the method in terms of accuracy and robustness on a variety of classical benchmark tests. Some physical problems have been studied in order to show the usefulness of both schemes. The LB code was successfully used to determine the longitudinal dispersion of metallic foams, with the use of a novel indicator. The entropic code was used to determine the permeability tensor of various porous media, from the Fontainebleau sandstone (low porosity) to a redwood tree sample (high porosity). These results are pretty accurate. Finally, the entropic framework is applied to the advection-diffusion equation as a passive scalar
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Soares, Carlos Walter Alves. "Metáforas e significados na composição musical : quando o compositor revisita e ressignifica seus passos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/148285.
Abstract:
Esta tese apresenta elucidações técnicas e interpretações póscomposicionais de quatro peças compostas durante o doutorado: “Io” e “Calisto”, para piano solo, “Ganimedes” e “Europa”, para dois pianos. A composição musical é abordada em três etapas: a) descrição dos aspectos musicais e extramusicais dos primeiros estágios da composição; b) investigação das características sonoras das peças; c) construção de interpretações ficcionais pós-composicionais, imaginando as luas de Júpiter como ímpeto composicional e interpretativo. O terceiro estágio é realizado na perspectiva da teoria contemporânea das metáforas, tal qual proposta por George Lakoff e Mark Johnson e, posteriormente, por Mark Turner e Gilles Falconnier. Através da apresentação das categorias de metáforas, cruzamentos de mapeamento de domínios, esquemas de imagens, princípio de invariância, espaços conceptuais e mesclagem conceptual, se estabelecem, neste trabalho, conexões entre os conceitos metafóricos e a conceptualização metafórica da música. Isso contribui para a aproximação entre as características marcantes das peças e as cenas/ações propostas como primeira etapa das interpretações pós-composicionais, construídas pelo compositor. O trabalho propõe-se a pensar sobre a atribuição de significados da composição musical em uma perspectiva global, em que elementos extramusicais podem expandir a assimilação do fenômeno musical, bem como contribuir para a pedagogia da composição musical e para a produção de trabalhos colaborativos.This thesis presents technical elucidations and post-compositional interpretations of four pieces composed during my doctorate degree: "Io" and "Calisto", for solo piano, "Ganimedes" and "Europa" for two pianos. The music composition is approached in three steps: a) description of the musical and extra musical aspects of the first stages of the composition; b) investigation of the sonorous characteristics of the pieces; c) construction of fictional postcompositional interpretations, imagining Jupiter's moons as compositional and interpretative impetus. The third stage is achieved under the perspective of the contemporary theory of metaphor proposed by George Lakoff and Mark Johnson, and posteriorly developed by Mark Turner and Gilles Falconnier. Through the introduction of metaphor categories, the cross-domain mapping, the image schema, the invariance principle, the mental spaces and the conceptual blending, some connections are established between the metaphoric concepts and the metaphoric conceptualization of music. This contributes to the approximation between the main characteristics of the pieces and the scenes/actions proposed in the first step of the post-compositional interpretations. This work proposes a reflection about the attribution of meanings on the musical composition in a global perspective, where extra musical elements can expand the assimilation of the musical phenomenon, as well as to contribute to the pedagogy of musical composition and the production of collaborative works.
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Smiley, W. J. "Collision detection scheme for unmanned aircraft using passive Panospheric§T§M Imaging sensor." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0002/MQ44858.pdf.
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Kubrak, Boris. "Direct numerical simulation of gas transfer at the air-water interface in a buoyant-convective flow environment." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10196.
Abstract:
The gas transfer process across the air-water interface in a buoyant-convective environment has been investigated by Direct Numerical Simulation (DNS) to gain improved understanding of the mechanisms that control the process. The process is controlled by a combination of molecular diffusion and turbulent transport by natural convection. The convection when a water surface is cooled is combination of the Rayleigh-B´enard convection and the Rayleigh-Taylor instability. It is therefore necessary to accurately resolve the flow field as well as the molecular diffusion and the turbulent transport which contribute to the total flux. One of the challenges from a numerical point of view is to handle the very different levels of diffusion when solving the convection-diffusion equation. The temperature diffusion in water is relatively high whereas the molecular diffusion for most environmentally important gases is very low. This low molecular diffusion leads to steep gradients in the gas concentration, especially near the interface. Resolving the steep gradients is the limiting factor for an accurate resolution of the gas concentration field. Therefore a detailed study has been carried out to find the limits of an accurate resolution of the transport for a low diffusivity scalar. This problem of diffusive scalar transport was studied in numerous 1D, 2D and 3D numerical simulations. A fifth-order weighted non-oscillatory scheme (WENO) was deployed to solve the convection of the scalars, in this case gas concentration and temperature. The WENO-scheme was modified and tested in 1D scalar transport to work on non-uniform meshes. To solve the 2D and 3D velocity field the incompressible Navier-Stokes equations were solved on a staggered mesh. The convective terms were solved using a fourth-order accurate kinetic energy conserving discretization while the diffusive terms were solved using a fourth-order central method. The diffusive terms were discretized using a fourth-order central finite difference method for the second derivative. For the time-integration of the velocity field a second-order Adams-Bashworth method was employed. The Boussinesq approximation was employed to model the buoyancy due to temperature differences in the water. A linear relationship between temperature and density was assumed. A mesh sensitivity study found that the velocity field is fully resolved on a relatively coarse mesh as the level of turbulence is relatively low. However a finer mesh for the gas concentration field is required to fully capture the steep gradients that occur because of its low diffusivity. A combined dual meshing approach was used where the velocity field was solved on a coarser mesh and the scalar field (gas concentration and temperature) was solved on an overlaying finer submesh. The velocities were interpolated by a second-order method onto the finer sub-mesh. A mesh sensitivity study identified a minimum mesh size required for an accurate solution of the scalar field for a range of Schmidt numbers from Sc = 20 to Sc = 500. Initially the Rayleigh-B´enard convection leads to very fine plumes of cold liquid of high gas concentration that penetrate the deeper regions. High concentration areas remain in fine tubes that are fed from the surface. The temperature however diffuses much stronger and faster over time and the results show that temperature alone is not a good identifier for detailed high concentration areas when the gas transfer is investigated experimentally. For large timescales the temperature field becomes much more homogeneous whereas the concentration field stays more heterogeneous. However, the temperature can be used to estimate the overall transfer velocity KL. If the temperature behaves like a passive scalar a relation between Schmidt or Prandtl number and KL is evident. A qualitative comparison of the numerical results from this work to existing experiments was also carried out. Laser Induced Fluorescence (LIF) images of the oxygen concentration field and Schlieren photography has been compared to the results from the 3D simulations, which were found to be in good agreement. A detailed quantitative analysis of the process was carried out. A study of the horizontally averaged convective and diffusive mass flux enabled the calculation of transfer velocity KL at the interface. With KL known the renewal rate r for the so called surface renewal model could be determined. It was found that the renewal rates are higher than in experiments in a grid stirred tank. The horizontally averaged mean and fluctuating concentration profiles were analysed and from that the boundary layer thickness could be accurately monitored over time. A lot of this new DNS data obtained in this research might be inaccessible in experiments and reveal previously unknown details of the gas transfer at the air water interface.
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Boutiton, Sophie. "Généralisation des schémas GQ2 et Rabin-Williams : équivalence avec la factorisation des grands nombres." Limoges, 2006. http://aurore.unilim.fr/theses/nxfile/default/2f7cec9e-e03a-447e-bb17-8d20828d1a30/blobholder:0/2006LIMO0007.pdf.
Abstract:
L’objectif de cette thèse est de généraliser les protocoles de sécurité GQ2 et Rabin- Williams, tous deux reliés au problème difficile de la factorisation des grands nombres. Nous évaluons la sécurité du schéma GQ2, en particulier à travers l’estimation de la capacité d’usurper une identité relativement à la capacité de factoriser la clé publique. Puis, nous montrons la forte probabilité de générer des clés GQ2 compatibles avec l’utilisation de modules RSA généraux, de modules multi-facteurs, ou de plus grands exposants publics. Dans le domaine de la signature, aucun schéma de type Rabin-Williams n’a jamais réussi à concilier l’utilisation d’un exposant unique de signature quel que soit le module considéré. Nous proposons ici une solution qui généralise naturellement les précédents schémas. Le dernier chapitre reprend une technique de preuve de validation du module. Sans améliorer les résultats antérieurs, un protocole couvrant une classe de modules de forme particulière est présentéThis thesis is about the generalization of the GQ2 and Rabin-Williams schemes. Their security relies on the problem of factorization of large numbers. First we have a look at the security of the GQ2 protocol by giving an estimation of the power of cheating related to the power of factorizing the public key number. Then we prove the overwhelming probability to generate GQ2 keys from general RSA moduli, from moduli composed by more than two factors, or from larger public exponents. Up until now, none of Rabin-Williams type digital signatures have a unique signature exponent when considering any two-factor modulus. We present here a solution that also generalizes the previous schemes. The last chapter is based on an article by Gennaro, Micciancio and Rabin (CCS99). Their results are not improved here but a new proof is given, using technical tools, to prove the validity of some two-factor moduli
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Faleh, Alaeddine. "Allocation stratégique d’actifs et ALM pour les régimes de retraites." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10084.
Abstract:
La présente thèse s’intéresse aux modèles d’allocation stratégiques d’actifs et à leurs applications pour la gestion des réserves financières des régimes de retraite par répartition, en particulier ceux partiellement provisionnés. L’étude de l’utilité des réserves pour un système par répartition et a fortiori de leur gestion reste un sujet peu exploré. Les hypothèses classiques sont parfois jugées trop restrictives pour décrire l'évolution complexe des réserves. De nouveaux modèles et de nouveaux résultats sont développés à trois niveaux : la génération de scénarios économiques (GSE), les techniques d’optimisation numérique et le choix de l’allocation stratégique optimale dans un contexte de gestion actif-passif (ALM). Dans le cadre de la génération de scénarios économiques et financiers, certains indicateurs de mesure de performance du GSE ont été étudiés. Par ailleurs, des améliorations par rapport à ce qui se pratique usuellement lors de la construction du GSE ont été apportées, notamment au niveau du choix de la matrice de corrélation entre les variables modélisées. Concernant le calibrage du GSE, un ensemble d’outils permettant l’estimation de ses différents paramètres a été présenté. Cette thèse a également accordé une attention particulière aux techniques numériques de recherche de l'optimum, qui demeurent des questions essentielles pour la mise en place d'un modèle d'allocation. Une réflexion sur un algorithme d’optimisation globale d’une fonction non convexe et bruitée a été développée. L’algorithme permet de moduler facilement, au moyen de deux paramètres, la réitération de tirages dans un voisinage des points solutions découverts, ou à l’inverse l’exploration de la fonction dans des zones encore peu explorées. Nous présentons ensuite des techniques novatrices d'ALM basées sur la programmation stochastique. Leur application a été développée pour le choix de l’allocation stratégique d’actifs des régimes de retraite par répartition partiellement provisionnés. Une nouvelle méthodologie pour la génération de l’arbre des scénarios a été adoptée à ce niveau. Enfin, une étude comparative du modèle d’ALM développé avec celui basé sur la stratégie Fixed-Mix a été effectuée. Différents tests de sensibilité ont été par ailleurs mis en place pour mesurer l’impact du changement de certaines variables clés d’entrée sur les résultats produits par notre modèle d’ALMThis thesis focuses on the strategic asset allocation models and on their application for the financial reserve management of a pay-as-you-go (PAYG) retirement schemes, especially those with partial provision. The study of the reserve utility for a PAYG system and of their management still leaves a lot to be explored. Classical hypothesis are usually considered too restrictive for the description of the complex reserve evolution. New models and new results have been developed over three levels : economic scenario generation (ESG), numerical optimization techniques and the choice of optimal strategic asset allocation in the case of an Asset-Liability Management (ALM). For the generation of financial and economic scenarios, some ESG performance indicators have been studied. Also, we detailed and proposed to improve ESG construction, notably the choice of the correlation matrix between modelled variables. Then, a set of tools were presented so that we could estimate ESG parameters variety. This thesis has also paid particular attention to numerical techniques of optimum research, which is an important step for the asset allocation implementation. We developed a reflexion about a global optimisation algorithm of a non convex and a noisy function. The algorithm allows for simple modulating, through two parameters, the reiteration of evaluations at an observed point or the exploration of the noisy function at a new unobserved point. Then, we presented new ALM techniques based on stochastic programming. An application to the strategic asset allocation of a retirement scheme with partial provision is developed. A specific methodology for the scenario tree generation was proposed at this level. Finally, a comparative study between proposed ALM model and Fixed-Mix strategy based model was achieved. We also made a variety of a sensitivity tests to detect the impact of the input values changes on the output results, provided by our ALM model
Books on the topic "Schéma passif":
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Duty Entitlement Pass Book (DEPB) Scheme: Report of the Comptroller and Auditor General of India for the year 2012-13. [New Delhi]: Comptroller and Auditor General of India, 2014.
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Cohn, Jr., Samuel K. The Great Influenza. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198819660.003.0020.
Abstract:
By October 1918, influenza had passed from a joking matter about the usual coughs and sniffles to a disease suddenly perceived as new, mysterious, and deadly. This chapter reviews the recent historiography of the Great Influenza from the 1970s to later studies that attempt to wedge this pandemic into a post-AIDS schema, claiming that it too ignited blame and the scapegoating of diseased victims and ‘others’. The chapter questions this portrayal along with the notion that it was a ‘Forgotten Pandemic’, especially in America. It also anticipates a theme developed in subsequent chapters that this pandemic sparked a charitable reaction of a magnitude never before witnessed in the history of medicine and disease. Moreover, at least in the US, the scale of this charitable response was new, and principally came from women and their organizational initiatives.
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Sindico, Francesco. National Measures and WTO Consistency—Border Measures and other Instruments to Prevent Carbon Leakage and Level the Carbon Playing Field. Edited by Kevin R. Gray, Richard Tarasofsky, and Cinnamon Carlarne. Oxford University Press, 2016. http://dx.doi.org/10.1093/law/9780199684601.003.0015.
Abstract:
This chapter analyses the consistency of the measures used by the states and the World Trade Organization (WTO) in facing carbon leakage. As a response to the wave of migration of private CO2 emitters to developing states with lax emission reduction measures, numerous developing states passed measures such as border tax adjustments (BTAs), border adjustment measures linked to the existence of an emissions trading scheme, climate change-related technical regulations, and green energy domestic support policies such as feed-in tariffs. The chapter also discusses the reasons for national climate measures that potentially end in conflict with WTO rules. In this context, the chapter discusses how these measures are motivated by carbon leakage, loss of competitiveness and energy security concerns, or a combination of all three.
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Zachary, Douglas, and Bodnar Andrew. Part V Financial Wrongdoing and Private International Law, 13 Introduction. Oxford University Press, 2017. http://dx.doi.org/10.1093/law/9780198716587.003.0013.
Abstract:
Private international law plays an important role in determining whether victims of corruption and commercial fraud can obtain private redress in the national courts. If the principles and rules of private international law are incoherent or parochial in design or in application, then private remedies against fraudsters may be jeopardized merely because the fraud has transnational elements. The chapter asks: can a fraudster avoid the jurisdiction of the victim’s courts by planning and implementing the fraudulent scheme in an ‘offshore’ territory? It also asks: can a victim trace misappropriated funds which have passed through accounts in different jurisdictions if the national law of one of those jurisdictions does not recognize the victim’s right to trace such funds? The answers to such questions are provided by private international law.
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Sack, Allen L., and Ellen J. Staurowsky. College Athletes for Hire. Greenwood Publishing Group, Inc., 1998. http://dx.doi.org/10.5040/9798400628443.
Abstract:
Many books have been written on the evils of commercialism in college sport, and the hypocrisy of payments to athletes from alumni and other sources outside the university. Almost no attention, however, has been given to the way that the National Collegiate Athletic Association has embraced professionalism through its athletic scholarship policy. Because of this gap in the historical record, the NCAA is often cast as an embattled defender of amateurism, rather than as the architect of a nationwide money-laundering scheme. Sack and Staurowsky show that the NCAA formally abandoned amateurism in the 1950s and passed rules in subsequent years that literally transformed scholarship athletes into university employees. In addition, by purposefully fashioning an amateur mythology to mask the reality of this employer-employee relationship, the NCAA has done a disservice to student-athletes and to higher education. A major subtheme is that women, such as those who created the Association for Intercollegiate Athletics for Women (AIAW), opposed this hypocrisy, but lacked the power to sustain an alternative model. After tracing the evolution of college athletes into professional entertainers, and the harmful effects it has caused, the authors propose an alternative approach that places college sport on a firm educational foundation and defend the rights of both male and female college athletes. This is a provocative analysis for anyone interested in college sports in America and its subversion of traditional educational and amateur principles.
Book chapters on the topic "Schéma passif":
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Fähndrich, Johannes, Sabine Weber, and Hannes Kanthak. "A Marker Passing Approach to Winograd Schemas." In Semantic Technology, 165–81. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04284-4_12.
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Panda, Dhabaleswar K., Sanjay Singal, and Pradeep Prabhakaran. "Multidestination message passing mechanism conforming to base wormhole routing scheme." In Parallel Computer Routing and Communication, 131–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-58429-3_33.
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Shparlinski, Igor. "Bit Security of the RSA Encryption and the Shamir Message Passing Scheme." In Cryptographic Applications of Analytic Number Theory, 211–15. Basel: Birkhäuser Basel, 2003. http://dx.doi.org/10.1007/978-3-0348-8037-4_19.
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Wakatani, Akiyoshi. "A Parallel Scheme for Solving a Tridiagonal Matrix with Pre-propagation." In Recent Advances in Parallel Virtual Machine and Message Passing Interface, 222–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-39924-7_32.
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Czarnul, Pawel, Karen Tomko, and Henryk Krawczyk. "Dynamic Partitioning of the Divide-and-Conquer Scheme with Migration in PVM Environment." In Recent Advances in Parallel Virtual Machine and Message Passing Interface, 174–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45417-9_26.
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Hanzlik, Lucjan, Kamil Kluczniak, and Mirosław Kutyłowski. "Attack on U-Prove Revocation Scheme from FC’13 - Passing Verification by Revoked Users." In Financial Cryptography and Data Security, 283–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45472-5_18.
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Russo, Francesco. "The Hilbert Scheme of Lines Contained in a Variety and Passing Through a General Point." In On the Geometry of Some Special Projective Varieties, 39–73. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26765-4_2.
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Jianqiang, Rao, Jiang Shengming, and He Dajiang. "A Token Passing Tree MAC Scheme for Wireless Ad Hoc Networks to Support Real-Time Traffic." In Mobile and Wireless Communications Networks, 47–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-45494-2_4.
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Wolpert, Stanley. "The Road Back to Satyagraha." In Gandhi’s Passion, 135–43. Oxford University PressNew York, NY, 2001. http://dx.doi.org/10.1093/oso/9780195130607.003.0014.
Abstract:
Abstract He drew up a scheme for reactivating the Congress and mobilizing its local committees to serve as volunteers going “from door to door in every town and village” to collect foreign cloth that was to be “publicly burnt” and to take orders for handwoven cloth from every householder. “Picketing foreign cloth shops may be undertaken wherever possible.... All units should from day to day report to the Central Office details of work done.
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Picoche, Jacqueline. "Le schema actantiel des verbes endurer, passer, porter, souffrir." In Actes du IVe colloque international sur le moyen français, 217–25. BRILL, 1985. http://dx.doi.org/10.1163/9789004649392_012.
Conference papers on the topic "Schéma passif":
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Zheng, Jiabin, Xuedao Shu, Qinying Lu, Zixuan Li, Haijie Xu, and Junkun Len. "Spin Forming Simulation and Forming Defect Analysis of Thin-Walled Deep Conical Parts." In ASME 2023 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/imece2023-114640.
Abstract:
Abstract Aluminum alloy is widely used in various thin-walled deep conical parts due to its strong corrosion resistance, high specific strength and good plasticity. In this paper, the deep cone 1100 aluminum alloy parts are spun by the preform scheme. This scheme combines the advantages of multi-pass stamping and spinning, and can reduce the number of spinning passes of deep cone parts to four passes, which significantly improves the production efficiency. In this paper, Simufact software is used for simulation experiments. Different spinning schemes and different spinning parameters are imported into finite element software for simulation analysis, and finally different simulation results are obtained. The results show that for the workpiece on the preform, it is feasible to use the scheme of one-pass die-fitting spinning. In the spin forming of the final die, if the scheme of single pass die forming is adopted, the waist of the workpiece has the risk of cracking, and the wall thickness distribution of the whole workpiece is uneven. The final product is formed by four passes spinning, and the wall thickness of the product is uniform and the quality is reliable. This paper provides a new processing scheme for the actual production of thin-walled deep tapered aluminum alloy parts, which can effectively solve the problems of many molds in stamping forming and complex roller trajectory in spin forming, and significantly improve the production efficiency.
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Jaiswal, Richa, and Karan Verma. "Modified IP passing scheme to check correctness of passed IP in VANET." In 2017 International Conference on Computer, Communications and Electronics (Comptelix). IEEE, 2017. http://dx.doi.org/10.1109/comptelix.2017.8004014.
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Tao, Shiquan, Bo Wang, and Dayong Wang. "TWOR scheme for holographic wavelength filters." In Passive Components and Fiber-based Devices III. SPIE, 2006. http://dx.doi.org/10.1117/12.689336.
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Dombovari, Zoltan, Daniel Bachrathy, and Gabor Stepan. "Optimization of Edge Geometry of Cylindrical Milling Tools to Enhance Dynamic Stability." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97761.
Abstract:
Abstract Tool geometry directly influences the dynamic performance of milling operations. Both surface properties and stability behavior are significantly influenced by the regeneration effect. The regeneration phenomenon is modelled by delay differential equations with delays originated from the time passed between consecutive flute passes. This work presents the implementation study of a constrained general optimization scheme for cutting edges of cylindrical milling cutters based on functional minimization principle. Mathematically, this leads to the determination of the corresponding weight function of a distributed delay differential equation. The presented semi-analytical methodology is based on the general milling model implemented in the semidiscretization framework.
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Elmasry, Aly, and Matthias Liermann. "Passive Pneumatic Teleoperation System." In ASME/BATH 2013 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fpmc2013-4464.
Abstract:
This paper describes the modeling and control of a pneumatic tele-operation scheme, where the connection of master and slave cylinder is realized signal based but also physically via long transmission lines. The system is called passive because of the passive physical connection, which can also serve as a safety fallback solution. The advantage of this scheme is that a limited force feedback is realized with a minimum of extra effort in comparison to a teleportation system without force feedback. The stiffness of the physical connection is enhanced through a cascaded position and pressure control scheme with two proportional valves as actuators for each pneumatic line. The paper presents the mathematical model of the setup, which is used to determine the relative stability of the dynamic system as a function of control parameters. An experimental setup is presented which was set up to validate the system model. For a distance of 5 m between master and slave cylinder a stiffness of 2.4 N/mm could be established.
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Ghorab, M., S. I. Kim, and I. Hassan. "Conjugate Heat Transfer and Film Cooling of a Multi-Stage Cooling Scheme." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69138.
Abstract:
Cooling techniques play a key role in improving efficiency and power output of modern gas turbines. The conjugate technique of film and impingement cooling schemes is considered in this study. The Multi-Stage Cooling Scheme (MSCS) involves coolant passing from inside to outside turbine blade through two stages. The first stage; the coolant passes through first hole to internal gap where the impinging jet cools the external layer of the blade. Finally, the coolant passes through the internal gap to the second hole which has specific designed geometry for external film cooling. The effect of design parameters, such as, offset distance between two-stage holes, gap height, and inclination angle of the first hole, on upstream conjugate heat transfer rate and downstream film cooling effectiveness performance are investigated computationally. An Inconel 617 alloy with variable properties is selected for the solid material. The conjugate heat transfer and film cooling characteristics of MSCS are analyzed across blowing ratios of Br = 1 and 2 for density ratio, 2. This study presents upstream wall temperature distributions due to conjugate heat transfer for different gap design parameters. The maximum film cooling effectiveness with upstream conjugate heat transfer is less than adiabatic film cooling effectiveness by 24–34%. However, the full coverage of cooling effectiveness in spanwise direction can be obtained using internal cooling with conjugate heat transfer, whereas adiabatic film cooling effectiveness has narrow distribution.
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Millsaps, Knox T., and Gregory L. Reed. "Reducing Lateral Vibrations of a Rotor Passing Through Critical Speeds by Acceleration Scheduling." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-234.
Abstract:
A method is presented for reducing the lateral response of an imbalanced rotor accelerating or decelerating through its first lateral bending critical speed by using a variable acceleration rate. A lumped parameter model along with a numerical integration scheme is used to simulate the response of a simply supported, single disk rotor during fast acceleration and deceleration through critical speed. The results indicate that the maximum response and/or the total vibrational energy of a rotor passing through the critical speed can be reduced significantly by using a variable acceleration schedule. That is, reducing the acceleration rate after the nominal critical speed is passed. These predictions were verified experimentally for a single disk rotor.
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Musa, Faisal A., and Anthony Chan Carusone. "A Passive Filter Aided Timing Recovery Scheme." In 2008 IEEE International Symposium on Circuits and Systems - ISCAS 2008. IEEE, 2008. http://dx.doi.org/10.1109/iscas.2008.4542105.
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Fan, Tao, Shi-Min Cai, Yong Liu, and Zhong-Qian Fu. "Realizing Compact Routing Scheme by Message Passing." In 2012 8th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM). IEEE, 2012. http://dx.doi.org/10.1109/wicom.2012.6478635.
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Venkateswara Reddy, M., Sourav De, and Ranjana Sodhi. "A Data-Driven Passive Islanding Detection Scheme." In 2022 IEEE 10th Power India International Conference (PIICON). IEEE, 2022. http://dx.doi.org/10.1109/piicon56320.2022.10045174.
Reports on the topic "Schéma passif":
1
Chattopadhyay, S., C. Kim, D. Massoletti, and A. Zholents. Study on a test of optical stochastic cooling scheme in a single pass beam line. Office of Scientific and Technical Information (OSTI), January 1997. http://dx.doi.org/10.2172/451204.
2
Arthur, R. Evaluating the 3D PBL scheme for wind energy applications in the complex terrain of Altamont Pass, CA. Office of Scientific and Technical Information (OSTI), March 2023. http://dx.doi.org/10.2172/1964009.
3
Evaluating the inclusion of family planning within the National Health Insurance benefits package in Ghana. Population Council, 2020. http://dx.doi.org/10.31899/sbsr2021.1036.
Abstract:
Contraceptive use in Ghana has remained low despite annual increases since 2012. Having a high unmet need for family planning (FP) suggests that there may be barriers to access and uptake. Over time, several policies, including Ghana’s Costed Implementation Plan from 2015–20, have suggested FP initiatives to improve contraceptive use yet they have not been entirely implemented. Further, although FP was included in the health insurance act passed in 2003, amended in 2008, and revised in 2012, which indicated that health-care benefits include FP, people continue to pay out of pocket for services at National Health Insurance Authority facilities because the policy is yet to be implemented. In some settings, evidence suggests an increase in contraceptive uptake with the removal of out-of-pocket costs for FP services, therefore embedding an FP package into Ghana’s national health insurance scheme may increase uptake of FP service and method mix and improve health outcomes. As noted in this report, this study assessed the impact of the FP pilot intervention, namely out-of-pocket cost removal for FP services, demand generation for FP, and provider training on long-acting reversible contraceptives service provision on FP service uptake.