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Relevant bibliographies by topics / Distortion curve

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Academic literature on the topic 'Distortion curve'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Distortion curve"

1

Liu, Yuqi, Yihang Ran, Yi Yang, Lin Chen, Tuling Xiong, and Hongchen Pan. "Analysis of impact of group delay on slope distortion of S-curve in delay locked loop." Journal of Navigation 74, no. 3 (2021): 698–712. http://dx.doi.org/10.1017/s0373463321000035.

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AbstractAs essential specifications of correlation domain for signal quality evaluation, distortions of the S-curve, including bias and slope distortions of the zero-crossing point, are usually selected as indicators of optimisation in the process of designing the channels of receivers or navigation satellites. Focusing on this issue, we present a detailed analysis of slope distortion in the presence of group delay and amplitude distortions. After validating the theoretical results, we present further discussions about the impacts of different group delay terms on slope distortions. The result

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Zhang, Bao Long, Shao Jing Zhang, Wei Qi Ding, and Hui Shuang Shi. "Fisheye Lens Distortion Calibration Based on the Lens Charactetic Curves." Applied Mechanics and Materials 519-520 (February 2014): 636–39. http://dx.doi.org/10.4028/www.scientific.net/amm.519-520.636.

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The fisheye lens is a kind of ultra wide angle lens, which can produce a big super-wide-angle lens distortion. In order to cover a large scope of light, barrel distortion is artificially added to the optical system. However, in some cases this distortion is not allowed, then it requires calibrations of those distortions. Most of the traditional distortion calibration method uses target plane calibration to do it. This paper discusses the way of design fisheye lens, through which we can know the forming process of distortion clearly. Based on this paper, a simple and effective calibration metho

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Denne, Elizabeth, and John M. Sullivan. "The distortion of a knotted curve." Proceedings of the American Mathematical Society 137, no. 03 (2008): 1139–48. http://dx.doi.org/10.1090/s0002-9939-08-09705-0.

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Ikokou, G. B., and J. Smit. "HYPERBOLIC DISTORTION MODEL FOR RADIAL DISTORTION CORRECTION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W13 (June 5, 2019): 1667–71. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w13-1667-2019.

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<p><strong>Abstract.</strong> When information derived from the imagery is used for metric purposes and not as communication tools the impact of small imaging errors can be significant on the accuracy of derived information. As the number of photogrammetry applications grows and the technology advances, camera calibration becomes more complex. In fact, most lenses suffer from at least one kind of distortion profile such as barrel, pincushion or ‘moustache’ profiles. Commonly observed on wide angle lenses, barrel distortions curve straight lines inwards to give the image shape

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Parmar, Anisha, Niraj Kinariwala, Nirav Parekh, Vishwesh Joshi, Riya Modi, and Urooj Desai. "Evaluation of surface topography of two different heat treated NiTi file systems used with sodium hypochlorite: A stereomicroscope and SEM study." Bioinformation 21, no. 05 (2025): 1257–65. https://doi.org/10.6026/973206300211257.

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The surface grooves on endodontic files act as stress concentration and it lowers their susceptibility to fatigue fracture. Hence, 80 first mandibular molars were prepared with 40 rotary instruments, 20 One Curve (OC; Micro-Mega) and 20 TruNatomy (TN; Dentsply Sirona,) rotary files. The files were rotated in mesial curved canals with irrigation with 5.25% sodium hypochlorite (Normal temperature and preheated) and inspected under SEM for surface roughness. Stereomicroscope analysis was done for Unwinding and Distortion. One Curve files showed signs of deformation and distortion earlier as compa

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Kolesnikov, Alexander, and Tuomo Kauranne. "Unsupervised segmentation and approximation of digital curves with rate-distortion curve modeling." Pattern Recognition 47, no. 2 (2014): 623–33. http://dx.doi.org/10.1016/j.patcog.2013.09.002.

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Hahn, Michael, and Richard Futrell. "Estimating Predictive Rate–Distortion Curves via Neural Variational Inference." Entropy 21, no. 7 (2019): 640. http://dx.doi.org/10.3390/e21070640.

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The Predictive Rate–Distortion curve quantifies the trade-off between compressing information about the past of a stochastic process and predicting its future accurately. Existing estimation methods for this curve work by clustering finite sequences of observations or by utilizing analytically known causal states. Neither type of approach scales to processes such as natural languages, which have large alphabets and long dependencies, and where the causal states are not known analytically. We describe Neural Predictive Rate–Distortion (NPRD), an estimation method that scales to such processes,

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Chen, Tianfei, Lijun Sun, Qiuwen Zhang, Xiang Wu, and Defeng Wu. "Nonmetric Correction of Lens Distortion Based on Entropy Measure." Scientific Programming 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/4230185.

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In the real vision system, lens always inevitably contains nonlinear distortion, which leads to geometric distortion of digital image, so it must be corrected. In this paper, a nonmetric correction algorithm for lens distortion based on entropy measure is proposed. The algorithm uses the imaging characteristics of the space line in the ideal perspective model, and the distortion entropy is defined to measure the degree of lens distortion. For distortion curves with different distribution, the calculation dimension of distortion entropy measure is uniform, which can reduce the influence of curv

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Sun, Yufen, and Gang Liu. "Rolling shutter distortion removal based on curve interpolation." IEEE Transactions on Consumer Electronics 58, no. 3 (2012): 1045–50. http://dx.doi.org/10.1109/tce.2012.6311354.

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Mejía, Yobani, and Rufino Díaz-Uribe. "Third order distortion analysis from an envelope curve." Optics Communications 454 (January 2020): 124492. http://dx.doi.org/10.1016/j.optcom.2019.124492.

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Dissertations / Theses on the topic "Distortion curve"

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Purcell, Andrew. "Analysis of quasiconformal maps in Rn." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001598.

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Grant, James D. E. "Spacetime distortion and quantum gravity." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321392.

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Garstka, Tomasz. "Separation of process induced distortions in curved composite laminates." Thesis, University of Bristol, 2005. http://hdl.handle.net/1983/399a3721-ffcf-40b7-9e47-86d8b00c82c8.

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Ankrum, Matthew Todd. "K3 Endo, Pro Taper, and Pro File Systems: Breakage and Distortion in Severely Curved Roots of Molars." VCU Scholars Compass, 2003. http://scholarscompass.vcu.edu/etd/842.

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K3 ENDO, PRO TAPER, AND PRO FILE SYSTEMS: BREAKAGE AND DISTORTION IN SEVERELY CURVED ROOTS OF MOLARS.By Matthew T. Ankrum, D.D.S.A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University.Virginia Commonwealth University, 2003Major Director: Gary R. Hartwell, D.D.S., M.S.Chairman and Professor, Department of EndodonticsIt was the aim of this study to investigate the incidence of file breakage and distortion when the Pro Taper, K3 Endo and ProFile systems were used to instrument canals in the severely curved roots of e

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Bettelli, Mercedes Amelia. "Effect of Induction-Heat Post-Curing on Residual Stresses in Fast-Curing Carbon Fibre Reinforced Composites." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80527.

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Manufacturing induced shape distortions is a common problem for composite materials. Due to the non-isotropic nature of carbon fibre reinforced polymers (CFRP) unavoidable deformations occur during part production. During fabrication of polymer composites, the material obtains its final shape at elevated temperatures. The curing process involves a transition from the liquid state to the solid, glassy state, allowing bonding between fibres and matrix. As the material cools the mismatch in thermal expansion coefficients and cure shrinkage obtained during the matrix polymerization leads to residu

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Moretti, Laure. "Simulation des distorsions de cuisson de pièces composites élaborées par co-bonding en autoclave." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2019. http://www.theses.fr/2019EMAC0009.

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Les composites stratifiés en fibres de carbone et à matrices thermodurcissables sont, grâce à leurs propriétés spécifiques, des matériaux très performants pour les pièces de structure primaire en aéronautique. Cependant, durant leur élaboration, de nombreux phénomènes multi-physiques conduisent à l’apparition de contraintes et de déformations résiduelles qui impactent la géométrie finale de la pièce. Ces écarts de géométrie sont critiques pour les pièces de grandes dimensions et les assemblages. Il est donc primordial de prédire ces déformations par la simulation. Le travail effectué au cours

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Mendes, Ricardo António Dias Costa Carvalho. "The market system demand curve : a fundamental distortion." Master's thesis, 2018. http://hdl.handle.net/10362/38858.

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Dissertation presented as the partial requirement for obtaining a Master's degree in Statistics and Information Management, specialization in Information Analysis and Management<br>Since the mid-1970s, the global economy has been dominated by the spread of capitalist market economies, growing inequality and increasing ecological degradation. The latter may be the most serious of these trends. Human economic activities have reached a level that is bound to instigate irreversible change to the global environment, creating conditions likely to be less conducive to human development. The mark

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Mullikin, Chad A. S. "On length minimizing curves with distortion thickness bounded below and distortion bounded above." 2006. http://purl.galileo.usg.edu/uga%5Fetd/mullikin%5Fchad%5Fa%5F200608%5Fphd.

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Hsieh, Kuan-shen, and 謝冠申. "Automated Surface Distortion Defect Inspection of Curved Car Mirrors." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/79319018431466742518.

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碩士<br>朝陽科技大學<br>工業工程與管理系碩士班<br>101<br>Comparing with plane car mirrors, curved car mirrors have characteristics of higher reflectance and wider field of view. Currently, the curved mirrors have been widely used in vehicle rearview mirrors and security mirrors on the driving roads and make drivers have better fields of views and driving information. In the production process of curved car mirrors, mirrors with surface distortion defects results from the unstable temperature changes of ovens and inappropriate control of over-flow fusion process. It is not easy to measure the magnitudes of dis

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Hsu, Kai-Chieh, and 許凱傑. "Distortion Reduction for Curved Hat Channel of AHSS(DP980)." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5cvj99.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>105<br>As the global warming becomes worse and the environmental consciousness rises, AHSS has been widely used as the material of automobile structural parts. However, as the strength of steels increases, stamping defects such as sidewall curl and distortion become worse. This study investigates the distortion in sheet metal forming. A-pillar is an automobile structural part. Among all automobile structural parts, A-pillar is most likely to be distorted. This study induces the geometric parameters of A-pillar. This study also establishes a model for curved hat c

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Books on the topic "Distortion curve"

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Robinson, John. Distortion measures for quadrilaterals with curved boundaries. NAFEMS, 1987.

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Rajaram, Navaratna Srinivasa. Nationalism and distortions in Indian history: Causes, consequences and cure. Naimisha Research Foundation, 2000.

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Geier, János, and Mariann Hudák. The Curved Grid Non-Illusions. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0045.

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The generally accepted explanation of the Hermann grid illusion is Baumgartner’s hypothesis that the illusory effect is generated by the response of retinal ganglion cells with concentric ON-OFF or OFF-ON receptive fields. To challenge this explanation, some simple distortions to the grid lines were introduced that make the illusion disappear totally, while all preconditions of Baumgartner’s hypothesis remained unchanged. Psychophysical experiments in which the distortion tolerance was measured showed the level of distortion at which the illusion disappears at a given type of distortion for a

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Scheel, John R., and Diana L. Lam. Enhancing Mass on MRI. Edited by Christoph I. Lee, Constance D. Lehman, and Lawrence W. Bassett. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190270261.003.0032.

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The ACR BI-RADS Atlas defines a “mass” on MRI as a space-occupying lesion with convex borders. Masses are characterized by their morphology and their internal enhancement characteristics. Mass morphology descriptor categories include shape (oval, round, irregular), margins (circumscribed, irregular, spiculated), and internal enhancement (homogeneous, heterogeneous, rim enhancement, dark internal septations). Suspicious morphology descriptors of MRI masses include irregular shape, irregular or spiculated margins, and heterogeneous internal enhancement. This chapter, appearing in the section on

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Book chapters on the topic "Distortion curve"

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Kolesnikov, Alexander, and Elena Trichina. "Determining the Number of Clusters with Rate-Distortion Curve Modeling." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31295-3_6.

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Takashima, Katsuyuki. "Efficiently Computable Distortion Maps for Supersingular Curves." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-79456-1_5.

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Boguslawsky, Iliya, Nikolay Korovkin, and Masashi Hayakawa. "Methods of Decreasing Nonlinear Distortion Factor in Voltage Curve of Salient-Pole Generator: Investigation of EMF Tooth Harmonics of Its Multiphase Winding with q per Pole and Phase as Integer." In Large A.C. Machines. Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56475-1_19.

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Ribeiro, Eraldo, and Edwin R. Hancock. "Analysis of Curved Textured Surfaces Using Local Spectral Distortion." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-44732-6_42.

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Bruni, Vittoria, Elisa Rossi, and Domenico Vitulano. "Optimal Image Restoration Using HVS-Based Rate-Distortion Curves." In Computer Analysis of Images and Patterns. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23678-5_31.

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Boguslawsky, Iliya, Nikolay Korovkin, and Masashi Hayakawa. "Methods of Decreasing Nonlinear Distortion Factor in Voltage Curve of Double-Fed Machines: Investigation of EMF Tooth Harmonics of Its Multiphase Stator and Rotor Windings with q Per Pole and Phase as Integer." In Large A.C. Machines. Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56475-1_20.

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Peerhossaini, H., and Y. Le Guer. "Effect of Curvature Plane Orientation on Vortex Distortion in Curved Channel Flow." In NATO ASI Series. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3438-9_27.

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Li, Fangfang, Vladimir Vasilyevich Lukin, Krzysztof Okarma, Yanjun Fu, and Jiangang Duan. "Intelligent Lossy Compression Method of Providing a Desired Visual Quality for Images of Different Complexity." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220050.

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Lossy compression plays a vital role in modern digital image processing for producing a high compression ratio. However, distortion is unavoidable, which affects further image processing and must be handled with care. Providing a desired visual quality is an efficient approach for reaching a trade-off between introduced distortions and compression ratio; it aims to control the visual quality of the decompressed images and make them not worse than the required by a user. This paper proposes an intelligent lossy compression method of providing a desired visual quality, which considers the comple

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Simencio Otero, Rosa L., Patricia M. Kavalco, Lauralice C. F. Canale, George E. Totten, and Lemmy Meekisho. "Quench Factor Analysis." In Encyclopedia of Aluminum and Its Alloys. CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000233.

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One of the steps of the heat treatment process of age-hardenable aluminum alloys is the quenching process in which the alloy is cooled from the solutionizing temperature. The objective is to quench sufficiently fast to avoid undesirable concentration of alloying elements in the defect and grain boundary structure while at the same time not quenching faster than necessary to minimize residual stresses, which may lead to excessive distortion, or cracking. Various studies have been conducted to predict the relative quench rate sensitivity to yield different properties for age-hardenable alloys. O

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Hsia Connie C.W. "Pulmonary Diffusion, Ventilation-Perfusion Ratio and Arterial Oxygen Homeostasis." In Biomedical and Health Research. IOS Press, 2010. https://doi.org/10.3233/978-1-60750-497-9-95.

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The lung derives from two distinct embryonic origins, has two separate circulations, undergoes extensive branching morphogenesis, experiences the highest blood flow and the largest continuous distortion among organs due to wide fluctuations in ventilation, perfusion and mechanical stresses. The inflated lung volume consists of about 85% air and 15% cells, fibers, matrix and blood. Both gravitation-dependent and -independent gradients contribute to spatial heterogeneity in structure and function. Dynamic factors such as surface folding, the surfactant layer, and capillary erythrocytes distribut

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Conference papers on the topic "Distortion curve"

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Batum, Ismail Hakki, and William Menninger. "Modeling Traveling-Wave Tube Distortion via Transfer Curve Fitting." In 2024 Joint International Vacuum Electronics Conference and International Vacuum Electron Sources Conference (IVEC + IVESC). IEEE, 2024. http://dx.doi.org/10.1109/ivecivesc60838.2024.10694880.

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Luo, Wenbin, Takafumi Iwaguchi, Ryusuke Sagawa, and Hiroshi Kawasaki. "Multi-Path Interference Mitigation For Indirect Time-of-Flight Camera By the Distortion of Coding Curve." In 2024 IEEE International Conference on Image Processing (ICIP). IEEE, 2024. http://dx.doi.org/10.1109/icip51287.2024.10648103.

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Wang, Feng, Jin Tao, Yixiang Li, Hongcheng Zhao, and Haobo Li. "Analysis of the influencing factors of the power angle curve distortion of the grid-forming doubly fed induction generator." In Ninth International Conference on Energy System, Electricity and Power (ESEP 2024), edited by Mohan Lal Kolhe, Yunfei Mu, Ze Cheng, and Qian Xiao. SPIE, 2025. https://doi.org/10.1117/12.3060027.

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Dørum, Cato, Johannes Veie, and Simen Hellgren Holtberget. "Laser- and laser-hybrid welding of steel bridge structures." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.2599.

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<p>This paper presents experience from the innovative application of laser welding and laser-hybrid welding techniques in the construction of three pilot bridges in Norway: Ya Bridge, Frønes Bridge, and Elverhøy Bridge. The aim of this work is to develop and demonstrate the efficiency, structural integrity, and environmental benefits of laser welding in bridge fabrication. Laser- and laser-hybrid welding is less energy intensive compared with traditional arc welding methods, give less distortion, and reduces the need for heat straightening. The technology qualification programme consists

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Dong Zheng, Liang Zhang, Demin Wang, and Andre Vincent. "Rate distortion optimized curve determination for curved wavelet image coding." In 2009 16th IEEE International Conference on Image Processing (ICIP 2009). IEEE, 2009. http://dx.doi.org/10.1109/icip.2009.5414479.

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Ma, Wenjuan, and Yuncai Liu. "A Curve-Fitting Method for Correcting Radial Distortion." In 2009 2nd International Congress on Image and Signal Processing (CISP). IEEE, 2009. http://dx.doi.org/10.1109/cisp.2009.5303248.

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Kolesnikov, Alexander. "Nonparametric polygonal and multimodel approximation of digital curves with Rate-Distortion curve modeling." In 2011 18th IEEE International Conference on Image Processing (ICIP 2011). IEEE, 2011. http://dx.doi.org/10.1109/icip.2011.6116152.

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Lopera-Mazo, Edwin Herlyt, and Carlos Mario Londono-Parra. "Experimental Magnetization Curve of a Transformer Considering Harmonic Distortion." In 2019 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA). IEEE, 2019. http://dx.doi.org/10.1109/pepqa.2019.8851565.

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Zou, Furong, Shengnan Tang, Xiaowen Li, and Tao Yu. "Book Image Distortion Correction Based on Bezier Curve Model." In 2022 IEEE 10th Joint International Information Technology and Artificial Intelligence Conference (ITAIC). IEEE, 2022. http://dx.doi.org/10.1109/itaic54216.2022.9836847.

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Lim, Hyungjun, DongYoon Kim, Joonsung Choi, et al. "An optimal motion vector regularization method using variance-distortion curve." In 2012 19th IEEE International Conference on Image Processing (ICIP 2012). IEEE, 2012. http://dx.doi.org/10.1109/icip.2012.6467162.

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Reports on the topic "Distortion curve"

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Cavallo, Eduardo A., and Christian Daude. Public Investment in Developing Countries: A Blessing or a Curse? Inter-American Development Bank, 2008. http://dx.doi.org/10.18235/0010897.

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This paper analyzes the impact of public investment on private investment in 116 developing countries between 1980 and 2006. It finds a strong crowding-out effect that seems to be the norm rather than the exception, both across regions and over time. This effect is dampened (or even reversed) in countries with better institutions that are more open to international trade and financial flows. These results confirm that while public infrastructure may complement private capital, distortions associated with the public investment process might crowd out private investment in the course of building

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EXPERIMENTAL STUDY ON INTERACTION OF DISTORTIONAL AND GLOBAL BUCKLING OF STAINLESS STEEL LIPPED CHANNEL COLUMNS. The Hong Kong Institute of Steel Construction, 2023. http://dx.doi.org/10.18057/ijasc.2023.19.2.7.

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This paper presents an experimental program to investigate distortional and global interaction buckling of stainless steel lipped channel columns in compression. Appropriate cross-sections and lengths were chosen so as to observe distortional-overall interaction buckling. In total, 21 buckling tests were conducted. After a brief introduction to the choice of column specimen geometries, key experimental results have been presented and discussed. The tests aim to study and observe the effect of distortional-global interactive buckling, study member under pin-ended boundary conditions, and provid

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