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Planar Tree Transformation through Flips
2007 International Conference on Information and Communication Technology, 2007A flip or edge-replacement is considered as a transformation by which one edge e of a geometric object is removed and an edge f (f ne e) is inserted such that the resulting object belongs to the same class as the original object. Here, we consider planar trees as geometric objects.
Md. Kamrul Islam, S M Rafizul Haque
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Transformation ratio of “ring-dot” planar piezoelectric transformer
Sensors and Actuators A: Physical, 2007Abstract A piezoelectric transformer (PT) is a device, which can be used for transforming an ac voltage via ultrasonic vibrations. The best characteristics are achieved in the vicinity of mechanical vibration resonance. “Ring-dot” type design of homogeneously poled disk PT was originally proposed by Berlincourt.
Petr Půlpán, Jiří Erhart
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Planar Polyline Drawings via Graph Transformations
Algorithmica, 2008zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Fourier transformation with a planar holographic doublet
Optics Letters, 1995The use of a single off-axis holographic lens for Fourier transformation results in phase errors that degrade its performance. A configuration of two identical off-axis holographic elements is proposed for performing Fourier transformation without phase errors. Such a configuration can be readily folded to form a compact and cascadable element that can
S, Reinhorn +3 more
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Broadband Planar 5:1 Impedance Transformer
IEEE Microwave and Wireless Components Letters, 2015This letter presents a broadband Guanella-type planar impedance transformer that transforms 50 $\Omega $ to 10 $\Omega $ with a 10 dB bandwidth of 1–14 GHz. The transformer is designed on a flexible 50 $\mu {\rm m}$ thick polyimide substrate in microstrip and parallel-plate transmission line topologies, and is inspired by the traditional 4 ...
Negar Ehsan +3 more
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Medial Axis Transformation of a Planar Shape
IEEE Transactions on Pattern Analysis and Machine Intelligence, 1982The medial axis transformation is a means first proposed by Blum to describe a shape. In this paper we present a 0(n log n) algorithm for computing the medial axis of a planar shape represented by an n-edge simple polygon. The algorithm is an improvement over most previously known results interms of both efficiency and exactness and has been ...
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Structure Design of Planar Transformer Winding
2020 3rd International Conference on Advanced Electronic Materials, Computers and Software Engineering (AEMCSE), 2020In order to reduce the volume of the magnetic component, the operating frequency of the magnetic component is generally increased. However, as the operating frequency increases, skin and proximity effects will increase the winding losses. At the same time, in the low-voltage and high-current DC/DC power supply module, method of parallel winding usually
Jie Zhang, Wandong Zhou
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Bidirectional battery charger with planar transformer
2013 Brazilian Power Electronics Conference, 2013This paper presents a proposal for Isolated Bidirectional battery charger. The charger in study has capacity to supply power 1.34KVA in a line of 400VDC and battery charging capability up to 5A at 192Vnom. For isolation of the batteries and improve energy efficiency in the conversion was used Planar transformer coupled to the switching transistors ...
Fabio Dalla Vecchia Rocha +3 more
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Acoustic planar hyperlens via transformation acoustics
Journal of Physics D: Applied Physics, 2011An acoustic planar hyperlens is designed using transformation acoustics. Magnification effects are added to a planar channelling lens to obtain the planar hyperlens. A layered system approach is employed to achieve an effective transformation medium.
Liang-Yu Wu, Lien-Wen Chen
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Augmented planar reflective symmetry transform
The Visual Computer, 2008Symmetry has been playing an increasing role in 3D shape processing. Recently introduced planar reflective symmetry transform (PRST) has been found useful for canonical coordinate frame determination, shape matching, retrieval, and segmentation. Guided by the intuition that every imperfect symmetry is imperfect in its own way, we investigate the ...
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