Relevant bibliographies by topics / Plate obstacle

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Plate obstacle'

Author: Grafiati
Published: 28 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Plate obstacle"

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Lovíšek, Ján. "Optimal design of laminated plate with obstacle." Applications of Mathematics 37, no. 5 (1992): 321–42. http://dx.doi.org/10.21136/am.1992.104514.

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Sundeep, Shivam, Xin Zhang, Siyang Zhong, and Huanxian Bu. "An experimental investigation of turbulent flow over a two-dimensional obstacle on a flat plate." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (August 1, 2021): 4459–70. http://dx.doi.org/10.3397/in-2021-2711.

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Aeroacoustic and aerodynamic characteristics of the turbulent boundary layer encountering a large obstacle are experimentally investigated in this paper. Two-dimensional obstacles with a square and a semi-circular cross-section mounted on a flat plate are studied in wind tunnel tests, with particular interests in the shear layer characteristics, wall pressure fluctuations, and far-field noise induced by the obstacles. Synchronized measurements of the far-field noise and the wall pressure fluctuations were conducted using microphone arrays in the far-field and flush-mounted in the plate, respectively. Additionally, the streamwise and wall-normal velocity fluctuations behind the obstacle were measured using the X-wire probe. The measured velocity profiles, spectra, and wall pressure spectra are compared, showing that the rectangular obstacle has a significant impact on both the turbulent flow and far-field noise. The large-scale vortical structures shed from the obstacles can be identified in the wall pressure spectra, the streamwise velocity spectra, and the wall pressure coherence analysis. Within the shear layer, the pairing of vortices occurs and the frequency of the broadband peak in the velocity spectra decreases as the shear layer grows downstream. Further eddy convective velocities of large-scale vortical structures inside the shear layer were analyzed based on the wall pressure fluctuations.
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Yan, W. M., R. C. Hsieh, and C. Y. Soong. "Experimental Study of Surface-Mounted Obstacle Effects on Heat Transfer Enhancement by Using Transient Liquid Crystal Thermograph." Journal of Heat Transfer 124, no. 4 (July 16, 2002): 762–69. http://dx.doi.org/10.1115/1.1459729.

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Effects of surface-mounted obstacles on the local heat transfer enhancement of a base plate are investigated by using transient liquid crystal thermograph technique. To explore the geometry effects of short obstacles, the height less than one hydraulic diameter (d), three cross-sectional shapes of obstacles, i.e., circular, square and diamond, with variations in number of obstacles, obstacle spacing, and free-stream Reynolds number are considered. The maximum number of the obstacles in tandem array is 3 and the spacing between obstacles is 1d, 2d, or 4d. The free-stream Reynolds number ranges from 2100 to 4200. The experimental results reveal that the local heat transfer enhancement in front of leading circular and square obstacles are better than the diamond one, while the influenced area by the obstacle of the diamond shape is most remarkable. The present results disclose that an intermediate height (0.5d) of the protruding elements is more beneficial to the heat transfer enhancement in wake of the obstacle. With the sweepback leading edge of the top surface, the diamond and circular obstacles produce vortical flow across the obstacles and thus enhance heat transfer downstream in wake. Increasing Reynolds number leads to an enhancement in heat transfer performance. The number of and the spacing between the obstacles in tandem array are also influential factors to the flow structure and heat transfer enhancement on the basic plate.
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Hlaváček, Ivan. "A mixed finite element method for plate bending with a unilateral inner obstacle." Applications of Mathematics 39, no. 1 (1994): 25–44. http://dx.doi.org/10.21136/am.1994.134241.

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Murea, Cornel M., and Dan Tiba. "Approximation of a simply supported plate with obstacle." Mathematics and Mechanics of Solids 23, no. 3 (July 17, 2017): 348–58. http://dx.doi.org/10.1177/1081286517718228.

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We discuss an algorithm for the solution of variational inequalities associated with simply supported plates in contact with a rigid obstacle. Our approach has a fixed domain character, uses just linear equations and approximates both the solution and the corresponding coincidence set. Numerical examples are also provided.
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Figueiredo, Isabel N., and Carlos F. Leal. "Sensitivity Analysis of a Nonlinear Obstacle Plate Problem." ESAIM: Control, Optimisation and Calculus of Variations 7 (2002): 135–55. http://dx.doi.org/10.1051/cocv:2002006.

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Khludnev, A. M. "Optimal control of a plate over an obstacle." Siberian Mathematical Journal 31, no. 1 (1990): 146–52. http://dx.doi.org/10.1007/bf00971160.

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Sturova, I. V. "Propagation of plane surface waves over an underwater obstacle and a submerged plate." Journal of Applied Mechanics and Technical Physics 32, no. 3 (1991): 348–55. http://dx.doi.org/10.1007/bf00852137.

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Wang, Tong Bin, Hai Peng Wang, Peng Xiao, Yi Qing Luan, and Li Li. "Substation Inspection Robot Crawler Obstacle-Navigation Platform Complex Environment Research." Applied Mechanics and Materials 415 (September 2013): 65–67. http://dx.doi.org/10.4028/www.scientific.net/amm.415.65.

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state grid electric power robotics laboratory has developed four generations of substation inspection robot, but large scope of substation outdoor and route of road surface condition is complex, the application of inspection robot produced strong constraints, the inspection robot under complex road conditions of obstacle ability put forward higher request. Through this study design of crawler obstacle-navigation platform enhances the obstacle negotiation ability, enable it to adapt to complex terrain conditions. Adopt six crawler structure, can cross the road the road opposite sides-to hold the substation, obstacles such as cable trench cover plate, and good stability, not easy to roll over, to the district of equipment to test the equipment, improve the ability of task. Key words: caterpillar; The obstacle-surmounting platform; Inspection; The robot
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Boudiaf, Ahlem, Fetta Danane, Youb Khaled Benkahla, Nabila Labsi, and Abdelkader Boutra. "Heat transfer convection of a power law fluid flow within a parallel plate channel provided with two generating obstacles." Mechanics & Industry 19, no. 2 (2018): 210. http://dx.doi.org/10.1051/meca/2017003.

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The main objective of this work is to examine the heat transfer changes induced by the presence of heat generating obstacles and that for non-Newtonian fluid flow within a parallel plate channel. The effects of the two obstacle height and the distance between them, on the flow structure and Nusselt number are examined. The Finite Volume Method is used to discretize the conservation equations of mass, momentum, and energy. The SIMPLER algorithm is applied to remove the checkerboard pressure problem. The results are discussed in terms of streamlines and the Nusselt number for three combinations of height and separation distance of the two obstacles. Two recirculation zones are observed for all the cases with different intensity varying with the size of the obstacle and the separation distance. Likewise the results show that the heat removal, occurring by the Nusselt number variations, is widely affected by the size of the obstacles as well as by the distance between them.
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Dissertations / Theses on the topic "Plate obstacle"

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Mouad, Mehdi. "Architecture de COntrôle/COmmande dédiée aux systèmes Distribués Autonomes (ACO²DA) : application à une plate-forme multi-véhicules." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22437/document.

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La complexité associée à la coordination d’un groupe de robots mobiles est traitée dans cette thèse en investiguant plus avant les potentialités des architectures de commande multi-contrôleurs dont le but est de briser la complexité des tâches à exécuter. En effet, les robots mobiles peuvent évoluer dans des environnements très complexes et nécessitent de surcroît une coopération précise et sécurisée pouvant rapidement devenir inextricable. Ainsi, pour maîtriser cette complexité, le contrôleur dédié à la réalisation d’une tâche est décomposé en un ensemble de comportements/contrôleurs élémentaires (évitement d’obstacles et de collision entre les robots, attraction vers une cible, planification, etc.) qui lient les informations capteurs (provenant des capteurs locaux du robot, etc.) aux actionneurs des différentes entités robotiques. La tâche considérée dans cette thèse correspond à la navigation d’un groupe de robots mobiles dans des environnements peu ou pas connus en présence d’obstacles (statiques et dynamiques). La spécificité de l’approche théorique consiste à allier les avantages des architectures multi-contrôleurs à ceux des systèmes multi-agents et spécialement les modèles organisationnels afin d’apporter un haut niveau de coordination entre les agents/robots mobiles. Le groupe de robots mobiles est alors coordonné suivant les différentes normes et spécifications du modèle organisationnel. Ainsi, l’activation d’un comportement élémentaire en faveur d’un autre se fait en respectant les contraintes structurelles des robots en vue d’assurer le maximum de précision et de sécurité des mouvements coordonnés entre les différentes entités mobiles. La coopération se fait à travers un agent superviseur (centralisé) de façon à atteindre plus rapidement la destination désirée, les événements inattendus sont gérés quant à eux individuellement par les agents/robots mobiles de façon distribuée. L’élaboration du simulateur ROBOTOPIA nous a permis d’illustrer chacune des contributions de la thèse par un nombre important de simulations
The difficulty of coordinating a group of mobile robots is adressed in this thesis by investigating control architectures which aim to break task complexity. In fact, multi-robot navigation may become rapidly inextricable, specifically if it is made in hazardous and dynamical environment requiring precise and secure cooperation. The considered task is the navigation of a group of mobile robots in unknown environments in presence of (static and dynamic) obstacles. To overcome its complexity, it is proposed to divide the overall task into a set of basic behaviors/controllers (obstacle avoidance, attraction to a dynamical target, planning, etc.). Applied control is chosen among these controllers according to sensors information (camera, local sensors, etc.). The specificity of the theoretical approach is to combine the benefits of multi-controller control architectures to those of multi-agent organizational models to provide a high level of coordination between mobile agents-robots systems. The group of mobile robots is then coordinated according to different norms and specifications of the organizational model. Thus, activating a basic behavior in favor of another is done in accordance with the structural constraints of the robots in order to ensure maximum safety and precision of the coordinated movements between robots. Cooperation takes place through a supervisor agent (centralized) to reach the desired destination faster ; unexpected events are individually managed by the mobile agents/robots in a distributed way. To guarantee performance criteria of the control architecture, hybrid systems tolerating the control of continuous systems in presence of discrete events are explored. In fact, this control allows coordinating (by discrete part) the different behaviors (continuous part) of the architecture. The development of ROBOTOPIA simulator allowed us to illustrate each contribution by many results of simulations
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Jahn, Jiří. "Potlačení turbulentního proudění v potrubí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444297.

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This thesis deals with ways to suppress turbulent flow in pipelines. In the first part various methods of laminarization are presented, when the turbulent flow is transformed into laminar flow, including the results of experiments published by the authors. The next part presents the results from CFD. The calculations were performed for one of the methods mentioned in the first part and the results were compared with each other. In addition, several options have been suggested to improve the original method.
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Hajjdiab, Hassan. "Vision-based localization, map building and obstacle reconstruction in ground plane environments." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29109.

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The work described in this thesis develops the theory of 3D obstacle reconstruction and map building problems in the context of a robot, or a team of robots, equipped with one camera mounted on board. The study is composed of many problems representing the different phases of actions taken by the robot. This thesis first studies the problem of image matching for wide baseline images taken by moving robots. The ground plane is detected and the inter-image homography induced by the ground plane is calculated. A novel technique for ground plane matching is introduced using the overhead view transformation. The thesis then studies the simultaneous localization and map building (SLAM) problem for a team of robots collaborating in the same work site. A vision-based technique is introduced in this thesis to solve the SLAM problem. The third problem studied in this thesis is the 3D obstacle reconstruction of the obstacles lying on the ground surface. In this thesis a Geometric/Variational level set method is proposed to reconstruct the obstacles detected by the robots.
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Chuhran, Christopher D. "Obstacle avoidance control in the vertical plane for the REMUS autonomous underwater vehicle." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FChuhran.pdf.

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RIFAI, SAID. "Etude du rayonnement acoustique d'un obstacle cylindrique place dans un ecoulement d'air subsonique." Poitiers, 1989. http://www.theses.fr/1989POIT2280.

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On etudie le rayonnement acoustique engendre par un ecoulement subsonique autour de cylindres de section circulaire. Dans une premiere partie, des methodes de mesure bidimensionnelles de l'intensite acoustique sont utilisees pour caracteriser le champ sonore du a un cylindre isole, a surface lisse ou a rugosite fine aleatoire. La seconde partie est une determination experimentale des pressions parietales sur un ou deux cylindres consideres comme des maquettes de cables de transport electrique, et ayant en consequence une structure de surface a rugosite forte et periodique. Les lois de coherence dans une section ou en envergure, ainsi que les fonctions de reponse en frequence des pressions instationnaires entre les deux cylindres sont donnees. Dans la troisieme partie est propose un modele numerique plan de rayonnement acoustique d'un ensemble de monopoles places dans ce plan. En introduisant les parametres issus des experiences ci-dessus, un modele de calcul du bruit du, a un ou deux cables de transport electriques places l'un derriere l'autre, est enfin presente
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Cutzach, Pierre-Marie. "Influence d'une interface plane sur la diffraction des ondes acoustiques et électromagnetiques par un obstacle." Rennes 1, 1997. http://www.theses.fr/1997REN10022.

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La premiere partie de ce memoire est consacree a l'etude de problemes de diffraction d'ondes acoustiques et electromagnetiques, par un obstacle place dans un milieu contenant deux couches homogenes separees par une interface plane. On montre que l'utilisation des conditions de rayonnement habituelles dans chaque couche fournit des problemes de diffraction bien poses. L'analyse repose sur l'etude des noyaux de green, ce qui permet de relier les conditions de rayonnement a des formules de representation integrale. Dans une seconde partie, nous nous interessons au traitement numerique des problemes ci-dessus. En electromagnetisme, nous presentons une technique de regularisation des equations de maxwell qui conduit a une discretisation par elements finis nodaux.
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Lefaudeux, Benjamin. "Détection, localisation et suivi des obstacles et objets mobiles à partir d'une plate-forme de stéréovision." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2013. http://tel.archives-ouvertes.fr/tel-00918508.

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Les véhicules autonomes se mouvant dans un environnement quelconque peuvent être confrontés à la présence de nombreux objets mobiles, dont la localisation et la trajectoire sont indépendantes. Cette problématique est particulièrement présente dans la thématique du transport en milieu urbain, mais sa portée est plus générale. On présente dans cette thèse une solution de perception d'un environnement dynamique, à partir d'une paire de caméra, qui vise à fournir en temps réel une cartographie en trois dimensions de l'environnement courant, ainsi que la vitesse indépendante des points suivis. Cette solution propose par ailleurs des algorithmes de détection, segmentation et suivi des objets mobiles, et fourni donc une liste des objets mobiles de l'environnement, dont les positions, dimensions et vitesses sont connues.
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Hemminger, Daniel L. "Vertical plane obstacle avoidance and control of the REMUS autonomous underwater vehicle using forward look sonar." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FHemminger.pdf.

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Xu, Bo Garner Brian Alan. "A linked-plane obstacle-set algorithm for modeling broad muscle paths application to the deltoid muscle /." Waco, Tex. : Baylor University, 2008. http://hdl.handle.net/2104/5212.

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Lefaudeux, Benjamin. "Détection, localisation et suivi des obstacles et objets mobiles à partir d'une plate forme de stéréo-vision." Thesis, Paris, ENMP, 2013. http://www.theses.fr/2013ENMP0091/document.

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Cette thèse s'inscrit dans la problématique de la perception des véhicules autonomes, qui doivent notamment être capables de détecter et de positionner à tout moment les éléments fixes et mobiles de leur environnement. Les besoins sont ensuite multiples, de la détection d'obstacles à la localisation du porteur dans l'espace, et de nombreuses méthodes de la littérature s'y attellent. L'objectif de cette thèse est de reconstituer, à partir de prises de vues de stéréo-vision, une carte en trois dimensions décrivant l'environnement proche ; tout en effectuant une détection, localisation et suivi dans le temps des objets mobiles.La détection et le suivi dans le temps d'un grand nombre de points d'intérêt constitue une première étape. Après avoir effectué une comparaison exhaustive de divers détecteurs de points d'intérêt de la littérature, on propose pour réaliser le suivi de points une implémentation massivement parallélisée de l'algorithme KLT, dans une configuration redondante réalisée pendant cette thèse. Cette implémentation autorise le suivi fiable de milliers de points en temps réel, et se compare favorablement à l'état de l'art.Il s'agit ensuite d'estimer le déplacement du porteur, et de positionner ces points dans l'espace, tâche pour laquelle on propose une évolution robuste d'une procédure bien connue, dite "SVD", suivie d'un filtrage par UKF, qui nous permettent d'estimer très rapidement le mouvement propre du porteur. Les points suivis sont ensuite positionnés dans l'espace, en prenant en compte leur possible mobilité, en estimant continuellement la position la plus probable compte tenu des observations successives.La détection et le suivi des objets mobiles font l'objet d'une dernière partie, dans laquelle on propose une segmentation originale tenant compte des aspects de position et de vitesse. On exploite ainsi une des singularités de notre approche, qui conserve pour chaque point positionné un ensemble cohérent de positions dans le temps. Le filtrage et le suivi des cibles se basent finalement sur un filtre GM-PHD
This PhD work is to be seen within the context of autonomous vehicle perception, in which the detection and localisation of elements of the surroundings in real time is an obvious requirement. Subsequent perception needs are manyfold, from localisation to obstacle detection, and are the subject of a continued research interest. The goal of this work is to build, in real time and from stereovision acquisition, a 3D map of the surroundings ; while detecting and tracking moving objects.Interest point selection and tracking on picture space are a first step, which we initiate by a thorough comparison of detectors from the literature. As regards tracking, we propose a massively parallel implementation of the standard KLT algorithm, using redundant tracking to provide reliable quality estimation. This allows us to track thousands of points in real-time, which compares favourably to the state of the art.Next step is the ego-motion estimation, along with the positioning of tracked points in 3D space. We first propose an iterative variant of the well known “SVD” process followed by UKF filtering, which allows for a very fast and reliable estimation. Then the position of every followed interest point is filtered on the fly over time, in contrast to most dense approaches from the literature.We finally propose a segmentation of moving objects in the augmented position-speed space, which is made possible by our continuous estimation of feature points position. Target tracking and filtering finally use a GM-PHD approach
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Books on the topic "Plate obstacle"

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Cuerington, Andrè M. The shortest path problem in the plane with obstacles: Bounds on path lengths and shortest paths within homotopy classes. Monterey, Calif: Naval Postgraduate School, 1991.

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Jenkins, Kevin Dean. The shortest path problem in the plane with obstacles: A graph modeling approach to producing finite search lists of homotopy classes. Monterey, Calif: Naval Postgraduate School, 1991.

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Rowling, J. K. Harry Potter à l'école des sorciers. Paris, France: Gallimard Jeunesse, 2001.

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Rowling, J. K. Harry Potter and the Philosopher's Stone. 2nd ed. London: Bloomsbury, 2010.

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Rowling, J. K. Harry Potter ve felsefe tasi. Istanbul, Turkey: YKY, 2001.

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Rowling, J. K. Harry Potter & de steen der wijzen. Amsterdam: De Harmonie, 1998.

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Rowling, J. K. Harry Potter and the Philosopher's Stone. St. Helens: Ted Smart, 1998.

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Rowling, J. K. Hyāri Paṭāra enḍa di philasaphārasa sṭona. Ḍhākā: Aṅkura Prakāśanī, 2004.

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Rowling, J. K. Harry Potter Büyülü Taş. Ankara, Turkey: Dost Kitabevi Yayinlari, 1999.

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Rowling, J. K. 哈利波特: 神秘的魔法石. Taibei Shi: Huang guan wen hua chu ban you xian gong si, 2000.

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Book chapters on the topic "Plate obstacle"

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Schickhofer, Lukas, Bernhard Semlitsch, and Mihai Mihăescu. "Numerical Flow Simulations of a Flexible Plate Attached to an Obstacle in Crossflow." In Springer Proceedings in Physics, 195–201. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30602-5_25.

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Bock, Igor. "Regularized Optimal Design Problem for a Viscoelastic Plate Vibrating Against a Rigid Obstacle." In IFIP Advances in Information and Communication Technology, 127–36. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-55795-3_11.

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Müller, S., S. Becker, T. Uffinger, F. Schäfer, J. Grabinger, and M. Kaltenbacher. "Acoustics and Turbulence Related to the Flow over a Flexible Plate Structure behind an Obstacle." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 457–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14243-7_56.

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Wang, Haitao. "Shortest Paths Among Obstacles in the Plane Revisited." In Proceedings of the 2021 ACM-SIAM Symposium on Discrete Algorithms (SODA), 810–21. Philadelphia, PA: Society for Industrial and Applied Mathematics, 2021. http://dx.doi.org/10.1137/1.9781611976465.51.

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Gustafsson, Tom, Rolf Stenberg, and Juha Videman. "Nitsche’s Method for the Obstacle Problem of Clamped Kirchhoff Plates." In Lecture Notes in Computational Science and Engineering, 407–15. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-96415-7_36.

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Agrawal, Sanjana, and R. Inkulu. "Visibility Polygon Queries Among Dynamic Polygonal Obstacles in Plane." In Lecture Notes in Computer Science, 136–48. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58150-3_11.

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Zachariasen, Martin, and Pawel Winter. "Obstacle-Avoiding Euclidean Steiner Trees in the Plane: An Exact Algorithm." In Algorithm Engineering and Experimentation, 286–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48518-x_17.

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Pęszor, Damian, Konrad Wojciechowski, Marcin Szender, Marzena Wojciechowska, Marcin Paszkuta, and Jerzy Paweł Nowacki. "Ground Plane Estimation for Obstacle Avoidance During Fixed-Wing UAV Landing." In Intelligent Information and Database Systems, 454–66. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73280-6_36.

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Santana, Pedro, Magno Guedes, Luís Correia, and José Barata. "Saliency-Based Obstacle Detection and Ground-Plane Estimation for Off-Road Vehicles." In Lecture Notes in Computer Science, 275–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04667-4_28.

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Perić, M., and C. Tropea. "Turbulent Flow over Surface-Mounted Obstacles in Plane and Axisymmetric Geometries." In Notes on Numerical Fluid Mechanics (NNFM), 18–26. Wiesbaden: Vieweg+Teubner Verlag, 1993. http://dx.doi.org/10.1007/978-3-663-13986-7_3.

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Conference papers on the topic "Plate obstacle"

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Wada, Sanehiro, and Noriyuki Furuichi. "Effect of Disturbed Flow Condition on Uncertainty of Flowrate Measurement Using Ultrasonic Doppler Velocity Profile Method." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-10147.

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To obtain an uncertainty of flowrate measurement using ultrasonic Doppler velocity profile method (UVP), experiments are carried out using the national standard calibration facility of water flowrate in Japan. Flowrate measurement is based on a multi-path measurement using three transducers. To generate a disturbed flow, obstacle plates are installed upstream of the test section. The maximum difference from the reference flowrate is over 2% when the measurement is performed at 8D downstream of the obstacle plate. At 25D downstream of the obstacle plate, the deviation is within the fundamental uncertainty level. The uncertainty caused by the upstream condition is negligible small for 25D downstream of the final disturbance, however it is estimated to 2.9% for 8D.
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Uchinono, Yuki, Koichi Ishizaka, Satoshi Watanabe, Akinori Furukawa, and Jun-Ho Kim. "Casing Wall Pressure Measurements of Cavitating Inducer with Inlet Asymmetrical Obstacle Plate." In 8th International Symposium on Cavitation. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-2826-7_246.

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Kodama, Takashi, and Shinsuke Mochizuki. "Measurement of the Wall Shear Stress With Sublayer Thin Plate of Thermochromic Liquid Crystal." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-25474.

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New optical method for measurement of the local wall shear stress has been developed by using thermo-chromic liquid crystal temperature measurement based on hue [1], [2] of the camera view. The flow field is the fully developed turbulent channel flow. Thin film made of thermo-chromic liquid crystal is placed on the wall. A rectangular shaped obstacle is glued on the film. The obstacle is within a region of buffer layer with height from the wall. Temperature of the film and the obstacle are slightly raised by a heater below the wall. The air flow makes non-uniform temperature distribution and non-uniform color distribution appears on the surface of the film. Relations between hue and local skin friction coefficient were examined in a turbulent air channel flow. It is indicated that a certain hue of a point is varying linearly against the corresponding local skin friction coefficient.
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Bock, Igor. "On the Dynamic Contact Problem for a Viscoelastic Plate." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24130.

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We deal with an initial-boundary value problem describing the perpendicular vibrations of an anisotropic viscoelastic plate free on its boundary and with a rigid inner obstacle. A weak formulation of the problem is in the form of the hyperbolic variational inequality. We solve the problem using the discretizing the time variable. The elliptic variational inequalities for every time level are uniquely solved. We derive the a priori estimates and the convergence of the sequence of segment line functions to a variational solution of the considered problem.
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Rastin, M. Ali, Erfan Talebzadeh, S. Ali A. Moosavian, and Mojtaba Alaeddin. "Trajectory tracking and obstacle avoidance of a ball and plate system using fuzzy theory." In 2013 13th Iranian Conference on Fuzzy Systems (IFSC). IEEE, 2013. http://dx.doi.org/10.1109/ifsc.2013.6675631.

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Lin, Chang, Tsung-Chun Ho, Shih-Chun Hsieh, and Kuang-An Chang. "Characteristics of Vortex Shedding Process Induced by a Solitary Wave Propagating Over a Submerged Obstacle." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92457.

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The generation and evolution of shedding vortices induced by a solitary wave propagating over a two-dimensional submerged obstacle, a rectangular dike or a vertical plate, was investigated experimentally. The vortex shedding process was observed qualitatively using laser induced fluorescence (LIF) technique and particle tracing technique. The velocity fields were measured quantitatively using particle image velocimetry (PIV). Base on the results of the flow visualization, the comparison of the vortex shedding processes between rectangular dike and vertical plate was qualitatively made under the same wave condition. It is noted that the process of either rectangular model or vertical plate can be divided into four common phases, but the characteristics of shedding vortices are different in the same phase. In addition, the velocity similarity profiles for the formation of separated shear layer and the formation of vertical jet were also quantitatively compared between rectangular dike and vertical plate.
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Fukue, Takashi, Katsuhiro Koizumi, Masaru Ishizuka, and Shinji Nakagawa. "Effect on Inlet Vent Porosity on Fan Characteristic Performance for Electronics Cooling." In ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASMEDC, 2009. http://dx.doi.org/10.1115/interpack2009-89219.

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Critical fan performance metric such as characteristic output curves and maximum flow rates are affected by various environmental conditions where cooling fans are installed. This paper describes the relationship between the fan performance and configuration factors such as the flow inlet porosity of electronic enclosure, the flow obstacles which imitate high-density packages and narrow flow area configurations. We installed a test enclosure in front of a test fan and measured P-Q curves of the test fan, which were operated in the enclosure. The experiments, it was observed that the pressure difference was increased in the enclosure by the effects of a wall. We installed a perforated plate in front of the fan as an obstacle and investigated how this changed the P-Q curve. In general, addition of the perforated plate in front of the fan decreased the characteristic output of the fan. On the other hand, the flow rate by the fan supply was decreased by the existence of the narrow inlet or obstacles. When an opening area in front of a fan became smaller than double of the fan flow area, the flow rate was significantly decreased. In addition, it was observed that the maximum flow rate depended on the opening area ratio. Finally, a model for predicting flow rates decreases by the enclosure inlet and obstacles was proposed.
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8

Mandal, Ashok K., and P. Wahi. "Coupled Plate-String Vibrations of a Stiff String Against an Obstacle: Application to Musical Instruments Like Sitar." In 5th International Congress on Computational Mechanics and Simulation. Singapore: Research Publishing Services, 2014. http://dx.doi.org/10.3850/978-981-09-1139-3_209.

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Andreani, Michele, and Ralf Kapulla. "Analyses of Gas Stratification Erosion by a Vertical Jet in Presence of an Obstacle Using the GOTHIC Code." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82360.

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The GOTHIC code was validated using three experiments carried out in the PANDA facility in the framework of the OECD/NEA project HYMERES. These tests addressed the mixing of an initially stratified atmosphere by means of a vertical jet in the presence of on obstacle (circular plate). This paper reports on the simulations of three experiments, and complementary, quasi-steady state tests without stratification, where the flow structure above the impingement plate could be observed by means of PIV velocity measurements in a region larger than that considered in the transient experiments. Moreover, simulations of similar tests without obstacle conducted during the OECD/SETH-2 are also discussed. The reference, best-estimate model used for the analyses of the three experiments with different flow rates and initial and pressure boundary conditions was built on the base of a multi-step approach. This was based on mesh and modelling sensitivity studies mostly performed for the complementary tests, to assess the capability to represent the flow structure produced by the jet-plate interaction with different meshes around the plate. Generally, the results show that the use of a coarse mesh and the standard k-ε turbulence model permits a reasonable representation of the erosion process, but with a systematic over prediction of the mixing time. The results with the reference model were more accurate for two experiments with two flow rates and same initial conditions and all complementary tests. For the third test with different initial and boundary conditions, however, poor results were obtained with the reference model, which could only be improved by further refining the mesh. These results indicate that a model “qualified” for certain conditions could be inadequate for other cases, and sensitivity studies are necessary for the specific conditions considered in the analyses.
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Kouzov, D. P., and M. G. Zhuchkova. "Transmission of a flexural-gravitational wave through an obstacle in an elastic plate floating atop a two-layer fluid. Thin-upper-layer approximation." In 2015 Days on Diffraction (DD). IEEE, 2015. http://dx.doi.org/10.1109/dd.2015.7354852.

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Reports on the topic "Plate obstacle"

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Guha, Sumanta, and Ichiro Suzuki. Proximity Problems for Points on a Rectilinear Plane with Rectangular Obstacles,. Fort Belvoir, VA: Defense Technical Information Center, January 1994. http://dx.doi.org/10.21236/ada297036.

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Morais, Carla, António Coelho, Alexandre Jacinto, and Marta Varzim, eds. The I SEA Project: Digital Publications. Faculdade de Ciências da Universidade do Porto, October 2020. http://dx.doi.org/10.24840/2020/978-989-746-279-5.

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The I SEA project aimed at the development of a non-obtrusive, valid and replicable method to evaluate audience attitudes about science communication projects through an immersive virtual reality environment that can improve exhibitions while educating and empowering citizens. To achieve the objectives of this highly complex, highly interdisciplinary, and innovative project, a permanent articulation of the scientific approach with the technical and design development took place, aiming the construction of the non- invasive evaluation method. Because it is an intricate project, it required constant iterations and interactions among the team members. So, we’ve learned somehow to consider limitations as engines for developing the project, instead of seeing them as obstacles.
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Sumpter, Cameron. Lab-in-Field Experiments for the Reintegration of Violent Extremists: The Promise of Prosocial Evaluation. RESOLVE Network, January 2021. http://dx.doi.org/10.37805/rve2021.3.

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When an inmate leaves prison following a sentence for terrorism offenses, their reintegration will depend on whether they can function as a relatively social member of their community. Obstacles such as stigmatization exist for all former convicts, but among steadfast extremists these barriers will be mutual, if they continue to perceive the ingroup-outgroup dichotomy that fed their extremism in the first place. A simple but effective means for determining the likelihood that returning prisoners will act prosocially towards the ‘other’ could be the use of so-called lab-in-field games, which provide small incentives to learn how individuals behave in a given situation, rather than just eliciting their sentiment. This chapter outlines the potential for such an approach. It draws on field research conducted in Indonesia in 2018, which involved interviews with 28 former convicted terrorists, regarding their practical experiences with reintegration and interactions in the community.
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S. Abdellatif, Omar. Localizing Human Rights SDGs: Ghana in context. Raisina House, June 2021. http://dx.doi.org/10.52008/gh2021sdg.

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In September 2015, Ghana along all UN member states endorsed the Agenda 2030 Sustainable Development Goals (SDGs) as the cardinal agenda towards achieving a prosperous global future. The SDGs are strongly interdependent, making progress in all goals essential for a country’s achievement of sustainable development. While Ghana and other West African nations have exhibited significant economic and democratic development post-independence. The judiciary system and related legal frameworks, as well as the lack of rule law and political will for safeguarding the human rights of its citizens, falls short of considering violations against minorities. Will Ghana be able to localize human rights related SDGs, given that West African governments historically tended to promote internal security and stability at the expense of universal human rights? This paper focuses on evaluating the commitments made by Ghana towards achieving Agenda 2030, with a particular focus on the SDGs 10 and 16 relating to the promotion of reduced inequalities, peace, justice and accountable institutions. Moreover, this paper also analyzes legal instruments and state laws put in place post Ghana’s democratization in 1992 for the purpose of preventing discrimination and human rights violations in the nation. The article aims to highlight how Ghana’s post-independence political experience, the lack of rule of law, flaws in the judiciary system, and the weak public access to justice are obstacles to its effective localization of human rights SGDs. Those obstacles to Ghana’s compliance with SDGs 10 and 16 are outlined in this paper through a consideration of human rights violations faced by the Ghanaian Muslim and HIV minorities, poor prison conditions, limited public access to justice and the country’s failure to commit to international treaties on human rights. Keywords: Ghana, human rights, rule of law, security, Agenda 2030
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Saville, Alan, and Caroline Wickham-Jones, eds. Palaeolithic and Mesolithic Scotland : Scottish Archaeological Research Framework Panel Report. Society for Antiquaries of Scotland, June 2012. http://dx.doi.org/10.9750/scarf.06.2012.163.

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Why research Palaeolithic and Mesolithic Scotland? Palaeolithic and Mesolithic archaeology sheds light on the first colonisation and subsequent early inhabitation of Scotland. It is a growing and exciting field where increasing Scottish evidence has been given wider significance in the context of European prehistory. It extends over a long period, which saw great changes, including substantial environmental transformations, and the impact of, and societal response to, climate change. The period as a whole provides the foundation for the human occupation of Scotland and is crucial for understanding prehistoric society, both for Scotland and across North-West Europe. Within the Palaeolithic and Mesolithic periods there are considerable opportunities for pioneering research. Individual projects can still have a substantial impact and there remain opportunities for pioneering discoveries including cemeteries, domestic and other structures, stratified sites, and for exploring the huge evidential potential of water-logged and underwater sites. Palaeolithic and Mesolithic archaeology also stimulates and draws upon exciting multi-disciplinary collaborations. Panel Task and Remit The panel remit was to review critically the current state of knowledge and consider promising areas of future research into the earliest prehistory of Scotland. This was undertaken with a view to improved understanding of all aspects of the colonization and inhabitation of the country by peoples practising a wholly hunter-fisher-gatherer way of life prior to the advent of farming. In so doing, it was recognised as particularly important that both environmental data (including vegetation, fauna, sea level, and landscape work) and cultural change during this period be evaluated. The resultant report, outlines the different areas of research in which archaeologists interested in early prehistory work, and highlights the research topics to which they aspire. The report is structured by theme: history of investigation; reconstruction of the environment; the nature of the archaeological record; methodologies for recreating the past; and finally, the lifestyles of past people – the latter representing both a statement of current knowledge and the ultimate aim for archaeologists; the goal of all the former sections. The document is reinforced by material on-line which provides further detail and resources. The Palaeolithic and Mesolithic panel report of ScARF is intended as a resource to be utilised, built upon, and kept updated, hopefully by those it has helped inspire and inform as well as those who follow in their footsteps. Future Research The main recommendations of the panel report can be summarized under four key headings:  Visibility: Due to the considerable length of time over which sites were formed, and the predominant mobility of the population, early prehistoric remains are to be found right across the landscape, although they often survive as ephemeral traces and in low densities. Therefore, all archaeological work should take into account the expectation of Palaeolithic and Mesolithic ScARF Panel Report iv encountering early prehistoric remains. This applies equally to both commercial and research archaeology, and to amateur activity which often makes the initial discovery. This should not be seen as an obstacle, but as a benefit, and not finding such remains should be cause for question. There is no doubt that important evidence of these periods remains unrecognised in private, public, and commercial collections and there is a strong need for backlog evaluation, proper curation and analysis. The inadequate representation of Palaeolithic and Mesolithic information in existing national and local databases must be addressed.  Collaboration: Multi-disciplinary, collaborative, and cross- sector approaches must be encouraged – site prospection, prediction, recognition, and contextualisation are key areas to this end. Reconstructing past environments and their chronological frameworks, and exploring submerged and buried landscapes offer existing examples of fruitful, cross-disciplinary work. Palaeolithic and Mesolithic archaeology has an important place within Quaternary science and the potential for deeply buried remains means that geoarchaeology should have a prominent role.  Innovation: Research-led projects are currently making a substantial impact across all aspects of Palaeolithic and Mesolithic archaeology; a funding policy that acknowledges risk and promotes the innovation that these periods demand should be encouraged. The exploration of lesser known areas, work on different types of site, new approaches to artefacts, and the application of novel methodologies should all be promoted when engaging with the challenges of early prehistory.  Tackling the ‘big questions’: Archaeologists should engage with the big questions of earliest prehistory in Scotland, including the colonisation of new land, how lifestyles in past societies were organized, the effects of and the responses to environmental change, and the transitions to new modes of life. This should be done through a holistic view of the available data, encompassing all the complexities of interpretation and developing competing and testable models. Scottish data can be used to address many of the currently topical research topics in archaeology, and will provide a springboard to a better understanding of early prehistoric life in Scotland and beyond.
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