Academic literature on the topic 'Parallelogram'

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Journal articles on the topic "Parallelogram"

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Bae, Sang Won. "On the Minimum-Area Parallelogram Annulus Problem." Symmetry 14, no. 2 (2022): 359. http://dx.doi.org/10.3390/sym14020359.

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The minimum-area parallelogram annulus problem is studied, in which one wants to compute a parallelogram annulus of minimum area that includes n input points in the plane. Extending an usual, doughnut-shaped circular annulus, a parallelogram annulus is defined to be a region between two edge-parallel parallelograms. As a parallelogram has two distinct orientations for its sides, so does a parallelogram annulus as well. In this paper, several variants of the problem are considered: (1) when both side orientations are given and fixed, (2) when one of them is fixed and the other can be freely cho
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Toumasis, Charalmpos. "When Is a Quadrilateral a Parallelogram?" Mathematics Teacher 87, no. 3 (1994): 208–11. http://dx.doi.org/10.5951/mt.87.3.0208.

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In most high school geometry textbooks the subject of parallelograms is usually treated in the following manner. First the definition is given: “A quadrilateral in which the opposite sides are parallel is called a parallelogram.” After this definition, some properties of parallelograms are mentioned that can serve as criteria for determining when a quadrilateral is a parallelogram.
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Salgado, Oscar, Oscar Altuzarra, Enrique Amezua, and Alfonso Hernández. "A Parallelogram-Based Parallel Manipulator for Schönflies Motion." Journal of Mechanical Design 129, no. 12 (2006): 1243–50. http://dx.doi.org/10.1115/1.2779898.

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A parallelogram-based 4 degrees-of-freedom parallel manipulator is presented in this paper. The manipulator can generate the so-called Schönflies motion that allows the end effector to translate in all directions and rotate around an axis parallel to a fixed direction. The theory of group of displacements is applied in the synthesis of this manipulator, which employs parallelograms in every limb. The planar parallelogram kinematic chain provides a high rotational capability and an improved stiffness to the manipulator. This paper shows the kinematic analysis of the manipulator, including the c
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Shurtleff, Richard. "Parallelogram space." General Relativity and Gravitation 27, no. 5 (1995): 495–509. http://dx.doi.org/10.1007/bf02105075.

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Zhang, Li Nan, Shu Xin Wang, Jian Min Li, and Jin Hua Li. "Design of a Master Manipulator with Dynamical Simplification for Master-Slave Robot." Applied Mechanics and Materials 418 (September 2013): 3–9. http://dx.doi.org/10.4028/www.scientific.net/amm.418.3.

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Dynamic behavior is an important factor to affect the performance of surgical robot, especially force-feedback master manipulator. In this paper, a force-feedback master manipulator with parallelogram is developed, which can realize self-gravity balance; Compare the dynamics of the force-feedback master manipulator with parallelogram mechanism and another one without parallelogram mechanism. The result shows that the dynamical equation of the master manipulator with parallelogram mechanism is simpler than the one without parallelogram mechanism. This parallelogram mechanism can be generally us
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Chao, Wu Wei, and Li Zhou. "Parallelogram Circumcenters: 10874." American Mathematical Monthly 109, no. 7 (2002): 669. http://dx.doi.org/10.2307/3072446.

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Boussicault, Adrien, and Patxi Laborde-Zubieta. "Periodic parallelogram polyominoes." Electronic Notes in Discrete Mathematics 59 (June 2017): 177–88. http://dx.doi.org/10.1016/j.endm.2017.05.013.

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Yuan, Liping, Yuqin Zhang, and Ren Ding. "Trisecting a parallelogram." Applied Mathematics-A Journal of Chinese Universities 17, no. 3 (2002): 307–12. http://dx.doi.org/10.1007/s11766-002-0009-7.

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Wang, Feng Hui, Qian Liu, and Hai Ming Wang. "Clamp Equipment Design and Motion Analysis with ANSYS for Large Cylindrical Segment." Applied Mechanics and Materials 197 (September 2012): 110–13. http://dx.doi.org/10.4028/www.scientific.net/amm.197.110.

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In this research, a kind of clamp for large cylindrical segment slinging and transportation was designed. Instead of the traditional theory that based of friction to slinging and transport, a new designing method that slinging cylindrical segment by grasping double hooks was taken in this research. Parallelogram structure was used to keep the clamp synchronous and horizontal movement. The design process is that Using principles of Parallelogram structure, Parallelogram structure is initially established. Parallelogram structure Motion analysis function of the ANSYS software was used to analyze
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Griffiths, A. Fuzz, and Qasim Zaidi. "Perceptual Assumptions and Projective Distortions in a Three-Dimensional Shape Illusion." Perception 29, no. 2 (2000): 171–200. http://dx.doi.org/10.1068/p3013.

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We examine a shape illusion, in which the balconies of a building appear to tilt up or down, depending on the viewpoint. The balconies are actually level parallelogram shapes, but appear as tilted rectangles. We measured the illusory tilts observed when parallelogram shapes are viewed above the line of sight, using three-dimensional stimuli consisting of parallelograms of various tilts viewed at different orientations. Under perspective projection, parallelism and orthogonality are not preserved. However, perspective distortions alone cannot account for the perceived tilts measured in these ex
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Dissertations / Theses on the topic "Parallelogram"

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Kienhuis, Anne Susan. "Prediction of hepatotoxic responses in humans:a toxicogenomics-based parallelogram appraoch." Maastricht : Maastricht : Universiteit Maastricht ; University Library, Universiteit Maastricht [host], 2008. http://arno.unimaas.nl/show.cgi?fid=9706.

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Chesters, Graeme S., and I. Welsh. "The death of collective identity? Global movement as a parallelogram of forces." International Centre for Participation Studies, 2007. http://hdl.handle.net/10454/3799.

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yes<br>This paper brings together a number of theoretical and political interests we have with the concept of global movements and the alter-globalisation, anticapitalist, and social justice movements in particular (Chesters & Welsh, 2004, 2005, 2006). The argument contained in this paper is that these movements are the emergent outcome of complex processes of interaction, encounter and exchange facilitated and mediated by new technologies of mobility and communication and they suggest the emergence of a post-representational cultural politics qualitatively different from the identity b
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Deb, Sagarmay. "Content-based image retrieval based on emergence index." University of Southern Queensland, Faculty of Sciences, 2003. http://eprints.usq.edu.au/archive/00001420/.

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Emergence is a phenomenon where we study the implicit or hidden meaning of an image. We introduce this concept in image database access and retrieval of images using his as an index for retrieval. This would give an entirely different search outcome than ordinary search where emergence is not considered, as consideration of hidden meanings could change the index of search. A feature of an image, which is not explicit would be emergent feature if it can be made explicit. There are three types of emergence: computational emergence, thermodynamic emergence and emergence relative to a model. In co
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Stangier, Stefanie D. "Theoretical and experimental investigation of the free vibration of parallelogram plates with simply supported and clamped boundary conditions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq28462.pdf.

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Vokál, Miroslav. "Manipulátor pro manipulaci s velkonábalem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231470.

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This work deals with the construction of a specific device for handling batching, such as paper rolls wound on a paper tube. It is included in the structural design of the device, control engineering calculations nodes developed basic drawing documentation manipulator.
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Струтинський, В. Б., та А. С. Дем'яненко. "Дослідження кінематики модельного паралелограмного механізму методом замкнених векторних контурів". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/38144.

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З метою підвищення точності верстата паралельної кінематики, було запропоновано розробити систему поточного контролю просторового положення платформи з замкненим вимірювальним контуром. При реалізації замкнених вимірювальних контурів, бажано використовувати вимірювальну апаратуру, що дає можливість безпосередньо визначати параметр, який контролюється. Переміщення платформи верстата паралельної кінематики з шістьма штангами змінної довжини у просторі залежить від видовження силових штанг верстата. Відповідно, поставлена задача - контролювати видовження кожної штанги верстата.
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Fankhänel, Andreas. "Metrical Problems in Minkowski Geometry." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-95007.

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In this dissertation we study basic metrical properties of 2-dimensional normed linear spaces, so-called (Minkowski or) normed planes. In the first chapter we introduce a notion of angular measure, and we investigate under what conditions certain angular measures in a Minkowski plane exist. We show that only the Euclidean angular measure has the property that in an isosceles triangle the base angles are of equal size. However, angular measures with the property that the angle between orthogonal vectors has a value of pi/2, i.e, a quarter of the full circle, exist in a wider variety of normed
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Matela, Milan. "Konstrukční úpravy koherencí řízeného holografického mikroskopu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230612.

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The aim of diploma thesis are modifications in mechanical design of the coherence controlled holographic microscope which will lead to reduction of some deficiencies. In this thesis there is a brief description of the history interference microscopy and differences between each types of interference microscopes. In this work there are stated some design deficiencies of actual condition of the microscope and also several solutions are suggested and shortly described. Then the best solution is chosen which is adjusted to a final form. It is described in detail and then realized. There is a summa
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Стукало, Оксана Анатоліївна. "Багатоланковий плоский механізм на базі механізму переміщення матеріалу швейних машин для виконання стібків класу 300". Магістерська робота, Київський національний університет технологій та дизайну, 2021. https://er.knutd.edu.ua/handle/123456789/18752.

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Робота присвячена аналізу різних структур механізму переміщення матеріалів швейної машини для виконання стібків класу 300. Аналізу механізму зубчастої рейки човникових швейних машин, опису функцій положення та синтезу зубчастої рейки за критерієм міцності. В роботі проаналізовані механізми переміщення матеріалів швейної машини, отримані математичні моделі, що описують функції положення рухомих ланок та характерних точок. Виконані комбінований оптимізаційний кінематичний синтез механізму, комп’ютерне моделювання механізму в програмі Mathcad. Побудовані суміщені графіки траєкторій типового та но
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Прядко, Ігор Олександрович. "Багатоланковий плоский механізм на базі механізму переміщення матеріалу швейних машин для виконання стібків класу 400". Магістерська робота, Київський національний університет технологій та дизайну, 2021. https://er.knutd.edu.ua/handle/123456789/18755.

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Робота присвячена аналізу плоских важільних механізмів з ступенем вільності W=2. В межах роботи виконано кінематичний синтез, аналіз та силовий розрахунок важільних механізмів базової конструкції та механізму зубчастої рейки раціональної конструкцій. Зважаючи на типову конструкцію механізмів зубчастої рейки краєобметувальних машин, конструкція механізму була обрана з урахуванням особливостей механізму зубчастої рейки швейної машини 208 кл. ПМЗ (Росія). В результаті проведення динамічного аналізу, який проводився при максимальній швидкості обертання головного валу технологічного обладнання, бул
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Books on the topic "Parallelogram"

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Parallelogram. Viking, 1987.

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Neoplatonism after Derrida: Parallelograms. Brill, 2007.

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Isakov, K. A. Novye samoustanavlivii︠u︡shchiesi︠a︡ mnogoopernye gibkie parallelogrammy \. NIT︢S︡ "Ghylym", 2002.

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Squares. Marshall Cavendish Benchmark, 2006.

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Rau, Dana Meachen. Rectangles. Marshall Cavendish Benchmark, 2006.

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Parallelogram. Paladin, 1989.

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Deręgowski, J. B. Cross-Cultural Studies of Illusions. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0002.

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Cross-cultural studies are of interest primarily because they demonstrate the extent of perceptual variation that would not be observable if the samples were derived from a single population. They are also of interest because they show how variation of factors such as age, gender, environment, cultural background, and genetics affects perception. Topics addressed include horizontal-vertical illusions, the Muller-Lyer illusion, and the Sander parallelogram. Perceptual processes are explored including perception of depth.
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Poundstone, Paula, and Faye Nisonoff Ruopp. The Sticky Problem of Parallelogram Pancakes: And Other Skill-Building Math Activities, Grades 4-5 (The Math with a Laugh Series). Heinemann, 2006.

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Gersh, Stephen. Neoplatonism After Derrida: Parallelograms (Studies in Platonism, Neoplatonism, and the Platonic Tradition). Brill Academic Publishers, 2006.

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Diamond Downhill (Community of Shapes). Dingles/Treehouse Court, 2005.

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Book chapters on the topic "Parallelogram"

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Wilson, Scott. "Parallelogram Binocular Mount." In Amateur Telescope Making. Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-0567-1_11.

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Lee, Chung-Ching, and Jacques M. Hervé. "On the Delassus Parallelogram." In Advances in Robot Kinematics: Analysis and Design. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8600-7_46.

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Benvenuto, Edoardo. "The Parallelogram of Forces." In An Introduction to the History of Structural Mechanics. Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-2982-7_4.

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Amir, Dan. "Loewner Ellipsoids and Parallelogram Inequalities." In Operator Theory: Advances and Applications. Birkhäuser Basel, 1986. http://dx.doi.org/10.1007/978-3-0348-5487-0_7.

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Massé, Alexandre Blondin, Mélodie Lapointe, and Hugo Tremblay. "Parallelogram Morphisms and Circular Codes." In Language and Automata Theory and Applications. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30000-9_17.

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Mantaci, Roberto, and Paolo Massazza. "From Linear Partitions to Parallelogram Polyominoes." In Developments in Language Theory. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22321-1_30.

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Amir, Dan. "The Parallelogram Equality and Derived Equalities." In Operator Theory: Advances and Applications. Birkhäuser Basel, 1986. http://dx.doi.org/10.1007/978-3-0348-5487-0_2.

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Hoijtink, Herbert. "PARELLA: An IRT Model for Parallelogram Analysis." In Handbook of Modern Item Response Theory. Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4757-2691-6_24.

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Pashkevich, A., A. Klimchik, S. Caro, and D. Chablat. "Stiffness Modelling of Parallelogram-Based Parallel Manipulators." In New Trends in Mechanism Science. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9689-0_77.

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Murena, Pierre-Alexandre, Antoine Cornuéjols, and Jean-Louis Dessalles. "Opening the Parallelogram: Considerations on Non-Euclidean Analogies." In Case-Based Reasoning Research and Development. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01081-2_39.

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Conference papers on the topic "Parallelogram"

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Salgado, Oscar, Oscar Altuzarra, Enrique Amezua, and Alfonso Herna´ndez. "A Parallelogram-Based Parallel Manipulator For Scho¨nflies Motion." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99197.

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A parallelogram-based four degrees-of-freedom parallel manipulator is presented in this paper. The manipulator can generate the so-called Scho¨nflies motion, that allows the end-effector to translate in all directions and rotate around an axis parallel to a fixed direction. The Theory of Group of Displacements is applied in the synthesis of this manipulator, which employs parallelograms in every limb. The planar parallelogram kinematic chain provides a high rotational capability and a improved stiffness to the manipulator. The paper shows the kinematic analysis of the manipulator, including th
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Schwarz, Christian, Jürgen Teich, Alek Vainshtein, Emo Welzl, and Brian L. Evans. "Minimal enclosing parallelogram with application." In the eleventh annual symposium. ACM Press, 1995. http://dx.doi.org/10.1145/220279.220338.

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Svetlik, Jozef, and Naqib Daneshjo. "Modular Robots in Parallelogram System." In 2008 6th International Symposium on Applied Machine Intelligence and Informatics (SAMI '08). IEEE, 2008. http://dx.doi.org/10.1109/sami.2008.4469173.

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Qin, Lijuan, Yulan Hu, Yingzi Wei, Yue Zhou, and Hong Wang. "Novel Parallelogram Based Pose Estimation Method." In 2008 4th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM). IEEE, 2008. http://dx.doi.org/10.1109/wicom.2008.2547.

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Huerta, L. Ruiz, A. Caballero-Ruiz, E. Marin-Aguilar, G. Velasco-Herrera, T. Baidyk, and E. Kussul. "Parallelogram Micromachine for Low Cost Micromechanics." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62186.

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This paper describes the experience of the Laboratory of Micromechanics and Mechatronics in the production of low cost micromechanics. A case of study is discussed and explained. The importance of applying simple mechanisms and high level control systems is presented. The basic elements and components needed to develop a high resolution micromachine tool are presented. This case of study is a MicroMachine Tool of 800nm of resolution in its three translational axes. Every single axis is able to move along 20mm. The configuration of the axes is not conventional, thanks to the use of parallel ele
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Lee, Po-Chih. "One Novel Isoconstrained Parallel Robot With Schoenflies-Motion." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12502.

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The coupling between two opposite bars of the hinged parallelogram produces relative 1-DoF circular translation and the opposite bars can move but remain parallel. From the point of view of kinematics, a hinged parallelogram is equivalent to a prismatic pair for a small motion. On the basis of a special parallel mechanism with the limb architecture of type CPUh (C and P denote cylindrical and prismatic pairs; Uh indicates the pseudo-universal-joint having one revolute and one screw pairs with the intersecting axes), we provide one novel Schoenflies-motion isoconstrained CPaUh//CPaUh robot with
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Limin, Li, and Zhang Guoxiang. "A New Compatible Parallelogram Thin Plate Element." In 2009 Second International Symposium on Computational Intelligence and Design. IEEE, 2009. http://dx.doi.org/10.1109/iscid.2009.118.

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Varziri, Saeed, and Leila Notash. "Kinematic Calibration of the Central Linkage of a Wire-Actuated Parallel Robot: A Comparison Between Two Nonlinear Approaches." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61132.

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In this article kinematic calibration of the central linkage of a wire-actuated parallel robot, which has a parallelogram mechanism in its structure, is discussed. It is shown that the dependency between the parallelogram joint angles affect the conditioning of the identification Jacobian matrix. Through a sensitivity analysis, it is presented that some of the parallelogram link lengths are not identifiable. Two nonlinear calibration approaches, Gauss-Newton and Levenberg-Marquardt, have also been explained and their difference especially when the identification Jacobian matrix is ill-conditio
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Ge, Guangshuang, Kai Yang, Ruixin Ma, and Zilong Li. "Vibration Modal Analysis of Parallelogram Linkage Palletizing Robot." In 2018 IEEE 4th Information Technology and Mechatronics Engineering Conference (ITOEC). IEEE, 2018. http://dx.doi.org/10.1109/itoec.2018.8740609.

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Bhaskar, Harish, and Naoufel Werghi. "Comparing Hough and Radon transform based parallelogram detection." In 2011 IEEE GCC Conference and Exhibition (GCC). IEEE, 2011. http://dx.doi.org/10.1109/ieeegcc.2011.5752619.

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Reports on the topic "Parallelogram"

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Ungar, Abraham A. The Relativistic Hyperbolic Parallelogram Law. GIQ, 2012. http://dx.doi.org/10.7546/giq-7-2006-249-264.

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