Articoli di riviste: "Discrete lines"

1

Vince, A. "Discrete Lines and Wandering Paths". SIAM Journal on Discrete Mathematics 21, n. 3 (gennaio 2007): 647–61. http://dx.doi.org/10.1137/050642009.

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Braun, Volker. "Discrete Wilson Lines in F-Theory". Advances in High Energy Physics 2011 (2011): 1–18. http://dx.doi.org/10.1155/2011/404691.

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F-theory models are constructed where the7-brane has a nontrivial fundamental group. The base manifolds used are a toric Fano variety and a smooth toric threefold coming from a reflexive polyhedron. The discriminant locus of the elliptically fibered Calabi-Yau fourfold can be chosen such that one irreducible component is not simply connected (namely, an Enriques surface) and supports a non-Abelian gauge theory.

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3

Suri, Rajan, e Bor-Ruey Fu. "On using continuous flow lines to model discrete production lines". Discrete Event Dynamic Systems: Theory and Applications 4, n. 2 (maggio 1994): 129–69. http://dx.doi.org/10.1007/bf01441209.

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4

ARRIBAS, E., C. GALLARDO, M. MOLINA e V. SANJOSÉ. "Electric Field Lines". International Journal of Modern Physics C 02, n. 01 (marzo 1991): 216–19. http://dx.doi.org/10.1142/s0129183191000196.

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We present the computer program called LINES which is able to calculate and visualize the electric field lines due to seven different discrete configurations of electric point charges. Also we show two examples of the graphic screens generated by LINES.

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5

MOHAUPT, THOMAS. "ORBIFOLD COMPACTIFICATIONS WITH CONTINUOUS WILSON LINES". International Journal of Modern Physics A 09, n. 26 (20 ottobre 1994): 4637–68. http://dx.doi.org/10.1142/s0217751x94001850.

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We identify the untwisted moduli of heterotic orbifold compactifications for the case where the gauge twist is realized by a rotation. The Wilson lines are found to have both continuous and discrete parts. For the case of the standard Z3 orbifold we classify all possibilities of breaking the gauge group E(6) ⊗ SU (3) by nine of the eighteen Wilson moduli and by additional discrete Wilson lines.

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Basdevant, A.-L., N. Enriquez, L. Gerin e J.-B. Gouéré. "Discrete Hammersley’s lines with sources and sinksm". Latin American Journal of Probability and Mathematical Statistics 13, n. 1 (2016): 33. http://dx.doi.org/10.30757/alea.v13-02.

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7

Chen, Hui, Lei Li e Zhichao Zhang. "Similarity Transformation of Discrete Part Production Lines". Journal of Physics: Conference Series 1885, n. 3 (1 aprile 2021): 032024. http://dx.doi.org/10.1088/1742-6596/1885/3/032024.

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8

Kailath, T., A. Bruckstein e D. Morgan. "Fast matrix factorizations via discrete transmission lines". Linear Algebra and its Applications 75 (marzo 1986): 1–25. http://dx.doi.org/10.1016/0024-3795(86)90178-3.

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9

Babaei, Vahid, e Roger D. Hersch. "Juxtaposed Color Halftoning Relying on Discrete Lines". IEEE Transactions on Image Processing 22, n. 2 (febbraio 2013): 679–86. http://dx.doi.org/10.1109/tip.2012.2221727.

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Želinský, Tomáš, Jason Wei Jian Ng e Martina Mysíková. "Estimating subjective poverty lines with discrete information". Economics Letters 196 (novembre 2020): 109545. http://dx.doi.org/10.1016/j.econlet.2020.109545.

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11

McIlroy, M. D. "A Note on Discrete Representation of Lines". AT&T Technical Journal 64, n. 2 (febbraio 1985): 481–90. http://dx.doi.org/10.1002/j.1538-7305.1985.tb00359.x.

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12

Xiang, Q. "Difference Families From Lines and Half Lines". European Journal of Combinatorics 19, n. 3 (aprile 1998): 395–400. http://dx.doi.org/10.1006/eujc.1997.0193.

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13

Du, L., J. Ben, Y. Li e R. Wang. "GENERATION ALGORITHM OF DISCRETE LINE IN MULTI-DIMENSIONAL GRIDS". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W7 (12 settembre 2017): 11–15. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w7-11-2017.

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Discrete Global Grids System (DGGS) is a kind of digital multi-resolution earth reference model, in terms of structure, it is conducive to the geographical spatial big data integration and mining. Vector is one of the important types of spatial data, only by discretization, can it be applied in grids system to make process and analysis. Based on the some constraint conditions, this paper put forward a strict definition of discrete lines, building a mathematic model of the discrete lines by base vectors combination method. Transforming mesh discrete lines issue in n-dimensional grids into the issue of optimal deviated path in n-minus-one dimension using hyperplane, which, therefore realizing dimension reduction process in the expression of mesh discrete lines. On this basis, we designed a simple and efficient algorithm for dimension reduction and generation of the discrete lines. The experimental results show that our algorithm not only can be applied in the two-dimensional rectangular grid, also can be applied in the two-dimensional hexagonal grid and the three-dimensional cubic grid. Meanwhile, when our algorithm is applied in two-dimensional rectangular grid, it can get a discrete line which is more similar to the line in the Euclidean space.

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14

Csajbók, Bence, Peter Sziklai e Zsuzsa Weiner. "Renitent lines". European Journal of Combinatorics 114 (dicembre 2023): 103792. http://dx.doi.org/10.1016/j.ejc.2023.103792.

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15

Khoshnoudirad, Daniel. "Farey lines defining Farey diagrams and application to some discrete structures". Applicable Analysis and Discrete Mathematics 9, n. 1 (2015): 73–84. http://dx.doi.org/10.2298/aadm150219008k.

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The aim of the paper is to study some of the analytical properties of Farey diagrams of order (m,n), which are associated to the (m,n)-cubes, that is the pieces of discrete planes, occurring in discrete mathematics. We give a closed formula for the number of Farey lines defining Farey diagrams. This number asymptotically behaves as mn(m+n)=?(3). Then we establish the relation with some discrete structures in the field of discrete geometry in particular.

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16

Abdoulkary, Saïdou, Alidou Mohamadou e Tibi Beda. "Exact traveling discrete kink-soliton solutions for the discrete nonlinear electrical transmission lines". Communications in Nonlinear Science and Numerical Simulation 16, n. 9 (settembre 2011): 3525–32. http://dx.doi.org/10.1016/j.cnsns.2010.12.029.

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17

Atkin, I. L., e E. Abraham. "Control of chaos in discrete Josephson transmission lines". IEEE Transactions on Appiled Superconductivity 7, n. 2 (giugno 1997): 2894–96. http://dx.doi.org/10.1109/77.621898.

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18

Love, A., W. A. Sabra e S. Thomas. "Background symmetries in orbifolds with discrete Wilson lines". Nuclear Physics B 427, n. 1-2 (settembre 1994): 181–202. http://dx.doi.org/10.1016/0550-3213(94)90274-7.

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19

Jinook Song e In-Cheol Park. "Pipelined Discrete Wavelet Transform Architecture Scanning Dual Lines". IEEE Transactions on Circuits and Systems II: Express Briefs 56, n. 12 (dicembre 2009): 916–20. http://dx.doi.org/10.1109/tcsii.2009.2035257.

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20

Karabati, Selcuk, Panagiotis Kouvelis e Gang Yu. "The Discrete Resource Allocation Problem in Flow Lines". Management Science 41, n. 9 (settembre 1995): 1417–30. http://dx.doi.org/10.1287/mnsc.41.9.1417.

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21

Fovell, Robert G., Gretchen L. Mullendore e Seung-Hee Kim. "Discrete Propagation in Numerically Simulated Nocturnal Squall Lines". Monthly Weather Review 134, n. 12 (1 dicembre 2006): 3735–52. http://dx.doi.org/10.1175/mwr3268.1.

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Abstract Simulations of a typical midlatitude squall line were used to investigate a mechanism for discrete propagation, defined as convective initiation ahead of an existing squall line leading to a faster propagation speed for the storm complex. Radar imagery often shows new cells appearing in advance of squall lines, suggesting a causal relationship and prompting the search for an “action-at-a-distance” mechanism to explain the phenomenon. In the simulations presented, the identified mechanism involves gravity waves of both low and high frequency generated in response to the latent heating, which subsequently propagate out ahead of the storm. The net result of the low-frequency response, combined with surface fluxes and radiative processes, was a cooler and more moist lower troposphere, establishing a shallow cloud deck extending ahead of the storm. High-frequency gravity waves, excited in response to fluctuations in convective activity in the main storm, were subsequently ducted by the storm’s own upper-tropospheric forward anvil outflow. These waves helped positively buoyant cumulus clouds to occasionally form in the deck. A fraction of these clouds persisted long enough to merge with the main line, invigorating the parent storm. Discrete propagation occurred when clouds developed into deep convection prior to merger, weakening the parent storm. The ducting conditions, as diagnosed with the Scorer parameter, are shown to be sensitive to vertical wind shear and radiation, but not to the microphysical parameterization or simulation geometry.

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22

Feng, Xianqun, e Jiafu Wan. "Digital Twins for Discrete Manufacturing Lines: A Review". Big Data and Cognitive Computing 8, n. 5 (26 aprile 2024): 45. http://dx.doi.org/10.3390/bdcc8050045.

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Along with the development of new-generation information technology, digital twins (DTs) have become the most promising enabling technology for smart manufacturing. This article presents a statistical analysis of the literature related to the applications of DTs for discrete manufacturing lines, researches their development status in the areas of the design and improvement of manufacturing lines, the scheduling and control of manufacturing line, and predicting faults in critical equipment. The deployment frameworks of DTs in different applications are summarized. In addition, this article discusses the three key technologies of high-fidelity modeling, real-time information interaction methods, and iterative optimization algorithms. The current issues, such as fine-grained sculpting of twin models, the adaptivity of the models, delay issues, and the development of efficient modeling tools are raised. This study provides a reference for the design, modification, and optimization of discrete manufacturing lines.

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23

Kara, M., A. Seçgin e T. Baygün. "Discrete Singular Convolution Method for Acoustic Transmission Lines". Acoustics Australia 48, n. 2 (3 aprile 2020): 271–85. http://dx.doi.org/10.1007/s40857-020-00185-3.

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24

Schilli, Bruno, Günther Mechler, Alexander Fay, Peter Bort e Rainer Drath. "EFFICIENT ENGINEERING OF FLEXIBLE ASSEMBLY LINES IN DISCRETE MANUFACTURING". IFAC Proceedings Volumes 39, n. 3 (2006): 479–84. http://dx.doi.org/10.3182/20060517-3-fr-2903.00251.

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25

Sato, M., S. Yasui, M. Kimura, T. Hikihara e A. J. Sievers. "Management of localized energy in discrete nonlinear transmission lines". Europhysics Letters (EPL) 80, n. 3 (9 ottobre 2007): 30002. http://dx.doi.org/10.1209/0295-5075/80/30002.

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26

Wang, Wenjie, Zhao Li, Liwen Jing, Qingfeng Zhang e Ross D. Murch. "Super-Resolution of Discrete Point Faults in Transmission Lines". IEEE Transactions on Antennas and Propagation 68, n. 4 (aprile 2020): 3111–23. http://dx.doi.org/10.1109/tap.2019.2957088.

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27

Dulcic, A., R. H. Crepeau e J. H. Freed. "Discrete microwave absorption lines in YBa2Cu3O7−δ single crystals". Physica C: Superconductivity 160, n. 3-4 (settembre 1989): 223–26. http://dx.doi.org/10.1016/0921-4534(89)90053-1.

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28

Chattopadhyay, S., e P. P. Das. "A new method of analysis for discrete straight lines". Pattern Recognition Letters 12, n. 12 (dicembre 1991): 747–55. http://dx.doi.org/10.1016/0167-8655(91)90072-t.

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29

Mehrez, Abraham, e B. Eddy Patuwo. "Discrete unreliable transfer lines with exogenous random unit demand". Computers & Industrial Engineering 26, n. 2 (aprile 1994): 307–20. http://dx.doi.org/10.1016/0360-8352(94)90064-7.

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30

Gu, Xi, Seungchul Lee, Xinran Liang, Mark Garcellano, Mark Diederichs e Jun Ni. "Hidden maintenance opportunities in discrete and complex production lines". Expert Systems with Applications 40, n. 11 (settembre 2013): 4353–61. http://dx.doi.org/10.1016/j.eswa.2013.01.016.

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31

Rörig, Thilo, e Gudrun Szewieczek. "The Ribaucour families of discrete R-congruences". Geometriae Dedicata 214, n. 1 (11 marzo 2021): 251–75. http://dx.doi.org/10.1007/s10711-021-00614-1.

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AbstractWhile a generic smooth Ribaucour sphere congruence admits exactly two envelopes, a discrete R-congruence gives rise to a 2-parameter family of discrete enveloping surfaces. The main purpose of this paper is to gain geometric insights into this ambiguity. In particular, discrete R-congruences that are enveloped by discrete channel surfaces and discrete Legendre maps with one family of spherical curvature lines are discussed.

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32

Nguyen, Duc Manh, e Sunghwan Kim. "The fog on: Generalized teleportation by means of discrete-time quantum walks on N-lines and N-cycles". Modern Physics Letters B 33, n. 23 (16 agosto 2019): 1950270. http://dx.doi.org/10.1142/s0217984919502701.

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The recent paper entitled “Generalized teleportation by means of discrete-time quantum walks on [Formula: see text]-lines and [Formula: see text]-cycles” by Yang et al. [Mod. Phys. Lett. B 33(6) (2019) 1950069] proposed the quantum teleportation by means of discrete-time quantum walks on [Formula: see text]-lines and [Formula: see text]-cycles. However, further investigation shows that the quantum walk over the one-dimensional infinite line can be based over the [Formula: see text]-cycles and cannot be based on [Formula: see text]-lines. The proofs of our claims on quantum walks based on finite lines are also provided in detail.

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33

ERLER, JENS, e MICHAŁ SPALIŃSKI. "MODULAR GROUPS FOR TWISTED NARAIN MODELS". International Journal of Modern Physics A 09, n. 25 (10 ottobre 1994): 4407–29. http://dx.doi.org/10.1142/s0217751x94001758.

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We demonstrate how to find modular discrete symmetry groups for ZN orbifolds. The Z7 orbifold is treated in detail as a nontrivial example of a (2, 2) orbifold model. We give the generators of the modular group for this case which, surprisingly, does not contain SL (2; Z)3 as had been speculated. The treatment models with discrete Wilson lines are also discussed. We consider examples which demonstrate that discrete Wilson lines affect the modular group in a nontrivial manner. In particular, we show that it is possible for a Wilson line to break SL (2, Z).

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34

Froeschlé, Claude, e Elena Lega. "On the Diffusion Along Resonant Lines in Continuous and Discrete Dynamical Systems". International Journal of Modern Physics B 17, n. 22n24 (30 settembre 2003): 3964–76. http://dx.doi.org/10.1142/s0217979203023033.

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We detect and measure diffusion along resonances in a discrete symplectic map for different values of the coupling parameter. Qualitatively and quantitatively the results are very similar to those obtained for a quasi-integrable Hamiltonian system, i.e. in agreement with Nekhoroshev predictions, although the discrete mapping does not fulfill completely, a priori, the conditions of the Nekhoroshev theorem.

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35

Aronov, Boris, Otfried Cheong, Xavier Goaoc e Günter Rote. "Lines Pinning Lines". Discrete & Computational Geometry 45, n. 2 (21 settembre 2010): 230–60. http://dx.doi.org/10.1007/s00454-010-9288-6.

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36

Beaudou, Laurent, Adrian Bondy, Xiaomin Chen, Ehsan Chiniforooshan, Maria Chudnovsky, Vašek Chvátal, Nicolas Fraiman e Yori Zwols. "Lines in hypergraphs". Combinatorica 33, n. 6 (dicembre 2013): 633–54. http://dx.doi.org/10.1007/s00493-013-2910-5.

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37

Deza, M., e V. P. Grishukhin. "Cut Lattices and Equiangular Lines". European Journal of Combinatorics 17, n. 2-3 (febbraio 1996): 143–56. http://dx.doi.org/10.1006/eujc.1996.0013.

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38

REZAI-RAD, GHOLAMALI, e AHMAD CHELDAVI. "DISCRETE TIME-DOMAIN ANALYSIS OF NONUNIFORM LOSSLESS COUPLED TRANSMISSION LINES". Journal of Circuits, Systems and Computers 14, n. 05 (ottobre 2005): 973–86. http://dx.doi.org/10.1142/s0218126605002763.

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In this paper, a discrete time-domain method to analyze multiple coupled nonuniform lossless transmission lines has been presented. The solution is based on the steplines approximation of the nonuniform transmission lines and quasi-TEM assumptions. Using steplines approximation, the system of coupled nonuniform transmission lines is decomposed into a large number of coupled steplines with different characteristics. Then, using modal decomposition method, the system of coupled partial differential equations for each step is decomposed to a set of uncoupled ordinary wave equation. Using time-domain approach and invoking the boundary condition at the discontinuities of the adjacent steps, each step is modeled as continuous time linear filter characterized by a time-domain transfer matrix. Finally, this continuous time linear filter (for band limited input signal), is modeled as a discrete time-domain linear filter with constant matrix coefficients using sampling theorem. The method proposed here can be implemented using general purpose software packages like MATLAB.

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39

Caputo, P., M. Darula, A. V. Ustinov e H. Kohlstedt. "Fluxon dynamics in discrete Josephson transmission lines with stacked junctions". Journal of Applied Physics 81, n. 1 (gennaio 1997): 309–14. http://dx.doi.org/10.1063/1.364110.

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40

Modeste Nguimdo, Romain, Samuel Noubissie e Paul Woafo. "Waves Amplification in Discrete Nonlinear Electrical Lines: Direct Numerical Simulation". Journal of the Physical Society of Japan 77, n. 12 (15 dicembre 2008): 124006. http://dx.doi.org/10.1143/jpsj.77.124006.

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41

Ho, K. P. "Broadcast digital subscriber lines using discrete multitone for broadband access". Microprocessors and Microsystems 22, n. 10 (maggio 1999): 605–10. http://dx.doi.org/10.1016/s0141-9331(99)00006-x.

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42

Demongodin, Isabel, e François Prunet. "Production Lines Modeling by Discrete / Continuous Aspect in Petri Nets". IFAC Proceedings Volumes 30, n. 19 (settembre 1997): 199–205. http://dx.doi.org/10.1016/s1474-6670(17)42299-3.

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43

Lim, Yun Fong, e Yue Wu. "Cellular Bucket Brigades on U-Lines with Discrete Work Stations". Production and Operations Management 23, n. 7 (23 ottobre 2013): 1113–28. http://dx.doi.org/10.1111/poms.12091.

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44

Bauer, Ulrich, Konrad Polthier e Max Wardetzky. "Uniform Convergence of Discrete Curvatures from Nets of Curvature Lines". Discrete & Computational Geometry 43, n. 4 (12 gennaio 2010): 798–823. http://dx.doi.org/10.1007/s00454-009-9237-4.

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45

Schramm, Oded, e Scott Sheffield. "Contour lines of the two-dimensional discrete Gaussian free field". Acta Mathematica 202, n. 1 (2009): 21–137. http://dx.doi.org/10.1007/s11511-009-0034-y.

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46

RABENSTEIN, R., e H. KRAUß. "DISCRETE SIMULATION OF UNIFORM TRANSMISSION LINES BY MULTIDIMENSIONAL DIGITAL FILTERS". International Journal of Numerical Modelling: Electronic Networks, Devices and Fields 9, n. 4 (luglio 1996): 271–94. http://dx.doi.org/10.1002/(sici)1099-1204(199607)9:4<271::aid-jnm239>3.0.co;2-x.

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47

CHANG, FUNG-YUEL, e OMAR WING. "TRANSIENT SIMULATION OF LOSSY COUPLED TRANSMISSION LINES CHARACTERIZED WITH FREQUENCY-DEPENDENT PARAMETERS". International Journal of High Speed Electronics and Systems 02, n. 04 (dicembre 1991): 319–53. http://dx.doi.org/10.1142/s0129156491000156.

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The method of characteristics is generalized to simulate the transient response of coupled transmission lines, which are characterized with frequency-dependent parameters. The discrete-time transient simulation is carried out from the equivalent decoupled transmission lines with an arbitrary set of characteristic impedances. The method eliminates the time-consuming convolution integration and has been adapted for iterative waveform relaxation simulation using the Fast Fourier Transform (FFT) for reduction of simulation cost. Examples are given to substantiate the accuracy and the efficiency of both discrete-time and waveform relaxation simulations.

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Bai, Yuchan, Jinyu Liu, Huihao Wu, Lei Fan, Renqing Li e Jun Xing. "Sinusoidal Frequency Estimator by Using Interpolation of Four DTFT Spectral Lines". Journal of Physics: Conference Series 2564, n. 1 (1 agosto 2023): 012016. http://dx.doi.org/10.1088/1742-6596/2564/1/012016.

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Abstract This paper proposes a sinusoid frequency estimator by interpolating four Discrete Time Fourier Transform (DTFT) samples. Firstly, Discrete Fourier Transform (DFT) is performed on the received sinusoid. Then we find the positional information of the maximal DFT bin and obtain the coarse estimation results. Next, the proposed method uses four symmetrical DTFT samples on both sides of the maximal DFT bin to interpolate the signal frequency and obtain accurate estimation results. Simulation experiment results illustrate that the proposed method’s accuracy is higher than that of the competitive methods. When the signal-to-noise ratio (SNR) increases from 0dB to 90dB, the presented estimator performs better than the competitive methods.

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Ballereau, D., J. Chauville, H. Cao, M. Floquet, A. M. Hubert e J. Zorec. "Discrete Structures in the CS Envelope of the Be star ζ Tau". International Astronomical Union Colloquium 175 (2000): 539–42. http://dx.doi.org/10.1017/s0252921100056451.

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AbstractThe recent cycle of the V/R ratio and RV variations in ζ Tau has been found similar to that reported by Delplace (1970). As a rule, in both cycles, singly-ionized metallic shell lines display discrete components when the descending branch of RV curve of Balmer lines crosses the stellar RV value; a narrow sharp feature is mainly superimposed on a broad and bluer one, both being slowly varying over some months; very weak additional components are suspected on stronger Fe II lines. On another hand, in the ascending branch of RV curve (RV ≥ RVstar), secondary shell components varying in intensity are conspicuous on V and R emissions of the first Balmer lines.

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BARRERA VARGAS, WALDEMAR DEL JESÚS, ANGEL CANO CORDERO e JUAN PABLO NAVARRETE CARRILLO. "The limit set of discrete subgroups of PSL(3, ℂ)". Mathematical Proceedings of the Cambridge Philosophical Society 150, n. 1 (2 settembre 2010): 129–46. http://dx.doi.org/10.1017/s0305004110000423.

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AbstractIf Γ is a discrete subgroup of PSL(3, ℂ), it is determined the equicontinuity region Eq(Γ) of the natural action of Γ on ℙ2ℂ. It is also proved that the action restricted to Eq(Γ) is discontinuous, and Eq(Γ) agrees with the discontinuity set in the sense of Kulkarni whenever the limit set of Γ in the sense of Kulkarni, Λ(Γ), contains at least three complex lines in general position. Under some additional hypothesis, it turns out to be the largest open set on which Γ acts discontinuously. Moreover, if Λ(Γ) contains at least four complex lines and Γ acts on ℙ2ℂ without fixed points nor invariant complex lines, then each connected component of Eq(Γ) is a holomorphy domain and a complete Kobayashi hyperbolic space.

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Articoli di riviste sul tema "Discrete lines"

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