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Articoli di riviste sul tema "Waves topology"

Autore: Grafiati

Pubblicato: 14 settembre 2024

Ultima modifica: 31 luglio 2025

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1

BUĞDAYCI, NECMI. "SCALAR WAVES IN A WORMHOLE TOPOLOGY." International Journal of Modern Physics D 15, no. 05 (2006): 669–93. http://dx.doi.org/10.1142/s0218271806008395.

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Global monochromatic solutions of the scalar wave equation are obtained in flat wormholes of dimensions (2+1) and (3+1). The solutions are in the form of infinite series involving cylindrical and spherical wave functions, and they are elucidated by the multiple scattering method. Explicit solutions for some limiting cases are illustrated as well. The results presented in this work constitute instances of solutions of the scalar wave equation in a space–time admitting closed time-like curves.

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Shabana, A. A., and W. H. Gau. "Propagation of Impact-Induced Longitudinal Waves in Mechanical Systems With Variable Kinematic Structure." Journal of Vibration and Acoustics 115, no. 1 (1993): 1–8. http://dx.doi.org/10.1115/1.2930309.

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In previous publications by the authors of this paper it was shown that elastic media become dispersive as the result of the coupling between the finite rotation and the elastic deformation. Impact-induced harmonic waves no longer travel, in a rotating rod, with the same phase velocity and consequently the group velocity becomes dependent on the wave number. In this investigation, the propagation of impact-induced longitudinal waves in mechanical systems with variable kinematic structure is examined. The configuration of the mechanical system is identified using two different sets of modes. Th

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3

Bokhari, Ahmad H., Abbas Mousavi, Bin Niu, and Eddie Wadbro. "Topology optimization of an acoustic diode?" Structural and Multidisciplinary Optimization 63, no. 6 (2021): 2739–49. http://dx.doi.org/10.1007/s00158-020-02832-9.

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AbstractBy using topology optimization, we consider the problem of designing a passive acoustic device that allows for one-way flow of sound waves; such a device is often colloquially referred to as an acoustic diode. The Helmholtz equation is used to model the time harmonic linear wave propagation together with a Dirichlet-to-Neumann (DtN) type boundary condition, and the finite element method is used for discretization. The objective of this study is to maximize the wave propagation in one direction (from left to right) and minimize the wave propagation in the reverse direction (from right t

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4

Hua, Yifei, Chao Qian, Hongsheng Chen, and Huaping Wang. "Experimental topology-optimized cloak for water waves." Materials Today Physics 27 (October 2022): 100754. http://dx.doi.org/10.1016/j.mtphys.2022.100754.

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5

Hasan, S. S., O. Steiner, and A. van Ballegooijen. "Inferring the chromospheric magnetic topology through waves." Proceedings of the International Astronomical Union 3, S247 (2007): 78–81. http://dx.doi.org/10.1017/s1743921308014695.

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AbstractThe aim of this work is to examine the hypothesis that the wave propagation time in the solar atmosphere can be used to infer the magnetic topography in the chromosphere as suggested by Finsterle et al. (2004). We do this by using an extension of our earlier 2-D MHD work on the interaction of acoustic waves with a flux sheet. It is well known that these waves undergo mode transformation due to the presence of a magnetic field which is particularly effective at the surface of equipartition between the magnetic and thermal energy density, the β = 1 surface. This transformation depends se

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6

Rak, Gašper, Marko Hočevar, and Franci Steinman. "Water surface topology of supercritical junction flow." Journal of Hydrology and Hydromechanics 67, no. 2 (2019): 163–70. http://dx.doi.org/10.2478/johh-2018-0042.

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Abstract The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow phenomenon, where standing waves with non-stationary water surface are formed. To analyse the hydrodynamic conditions at an asymmetric right-angled junction with incoming supercritical flows at Froude numbers between 2 and 12, an experimental approach was used. For a phenomenological determination of the relations between the integral parameters of incoming flows and the characteristics of standing waves at the junction area, water surfac

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7

Lin, Mengnan, Zhongwei Tian, Siyuan Chang, Kai Cui, and Shulan Dai. "Three-Dimensional Shock Topology Detection Method via Tomographic Reconstruction." Aerospace 10, no. 3 (2023): 275. http://dx.doi.org/10.3390/aerospace10030275.

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Shock waves and shock-shock interaction are typical phenomena in supersonic or hypersonic flows that have significant impacts on aerodynamic performance. To obtain a comprehensive understanding of the mechanism of shock wave interaction, shock wave detection (SWD) methods are required. However, it is often challenging for most current SWD methods to identify the relationship between shock waves (also known as shock topology). To address this issue, this paper proposes a novel three-dimensional shock topology detection method based on the tomographic reconstruction strategy. This method involve

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8

Mirev, Andrei, Anton Andonov, and Yovko Rakanov. "Photovoltaic’s inverter directly connected to the grid." Science, Engineering and Education 1, no. 1 (2016): 32–35. http://dx.doi.org/10.59957/see.v1.i1.2016.5.

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The paper describes a modification of the topology of a photovoltaic’s inverter with a flying inductor connected to a single phase grid in absence of any transformer. The topology advanced provides the application of buck-, boost- and buck-boost modes of transforming at both half-waves of the grid voltage. It works as a three level inverter reducing high frequency disturbances. The symmetric work in both half-waves facilitates the control required.

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9

Ables, S. T., B. J. Fraser, C. L. Waters, D. A. Neudegg, and R. J. Morris. "Monitoring cusp/cleft topology using Pc5 ULF waves." Geophysical Research Letters 25, no. 9 (1998): 1507–10. http://dx.doi.org/10.1029/98gl00848.

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10

Liu, Ze, Hao-Wen Dong, and Gui-Lan Yu. "Topology optimization of periodic barriers for surface waves." Structural and Multidisciplinary Optimization 63, no. 1 (2020): 463–78. http://dx.doi.org/10.1007/s00158-020-02703-3.

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11

Zieske, Katja, Jakob Schweizer, and Petra Schwille. "Surface topology assisted alignment of Min protein waves." FEBS Letters 588, no. 15 (2014): 2545–49. http://dx.doi.org/10.1016/j.febslet.2014.06.026.

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12

Han, Sihao, Qiang Han, and Chunlei Li. "Deep-learning-based inverse design of phononic crystals for anticipated wave attenuation." Journal of Applied Physics 132, no. 15 (2022): 154901. http://dx.doi.org/10.1063/5.0111182.

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Bandgaps of phononic crystals dominating the propagation of evanescent waves have received significant attention recently, which can be determined and tuned by the topology of a unit cell. Predicting a band structure and designing topological structures with desirable characteristics have become a research hotspot. In this study, a data-driven deep learning framework is applied to arrive at the prediction of the band structure and the inverse design of topology. A convolutional neural network is trained to predict band structures of phononic crystals. After training a generative adversarial ne

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13

Wang, Hai-Xiao, Guang-Yu Guo, and Jian-Hua Jiang. "Band topology in classical waves: Wilson-loop approach to topological numbers and fragile topology." New Journal of Physics 21, no. 9 (2019): 093029. http://dx.doi.org/10.1088/1367-2630/ab3f71.

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14

Ivanov, S. T., K. M. Ivanova, and E. G. Alexov. "Rayleigh surface waves along the boundary between a plasma and a metallic screen." Journal of Plasma Physics 49, no. 2 (1993): 227–35. http://dx.doi.org/10.1017/s0022377800016949.

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Electromagnetic wave propagation along the interface between a magnetoactive plasma and a metallic screen is investigated analytically and numerically. It is shown that the waves have a Rayleigh character: they are superpositions of two partial waves. It is concluded that electromagnetic waves propagate only at frequencies lower than min (ωp, ωc), where ωpis the plasma frequency and ωcis the cyclotron frequency. The field topology is found, and the physical character of the waves is discussed.

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15

He, Jingjie, and Zhan Kang. "Achieving directional propagation of elastic waves via topology optimization." Ultrasonics 82 (January 2018): 1–10. http://dx.doi.org/10.1016/j.ultras.2017.07.006.

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16

Kiritsis, Elias, and Costas Kounnas. "Dynamical topology change, compactification and waves in string cosmology." Nuclear Physics B - Proceedings Supplements 41, no. 1-3 (1995): 311–30. http://dx.doi.org/10.1016/0920-5632(95)00440-k.

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17

Deng, Yongbo, and Jan G. Korvink. "Topology optimization for three-dimensional electromagnetic waves using an edge element-based finite-element method." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2189 (2016): 20150835. http://dx.doi.org/10.1098/rspa.2015.0835.

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This paper develops a topology optimization procedure for three-dimensional electromagnetic waves with an edge element-based finite-element method. In contrast to the two-dimensional case, three-dimensional electromagnetic waves must include an additional divergence-free condition for the field variables. The edge element-based finite-element method is used to both discretize the wave equations and enforce the divergence-free condition. For wave propagation described in terms of the magnetic field in the widely used class of non-magnetic materials, the divergence-free condition is imposed on t

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18

Zhang, W. Z., H. S. Fu, J. B. Cao, Z. Wang, and Y. Y. Liu. "Properties of the Turbulence and Topology in a Turbulent Magnetic Reconnection." Astrophysical Journal 953, no. 1 (2023): 23. http://dx.doi.org/10.3847/1538-4357/acdacf.

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Abstract Magnetic reconnection is a crucial process responsible for energy conversion and particle acceleration in space, astrophysical, and laboratory plasmas. Turbulence and magnetic reconnection can be mutually driven, but the underlying nature of energy dissipation, intrinsic turbulence waves, and magnetic field topologies in turbulent magnetic reconnection is still poorly understood. Here, using advanced multi-spacecraft mission and innovative methods, we provide a few new perspectives to investigate the properties of the turbulence and topology in a turbulent magnetic reconnection in the

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19

Kolobov, D. Y., and N. I. Kobanov. "Two modes of propagating waves in sunspots." Proceedings of the International Astronomical Union 3, S247 (2007): 105–9. http://dx.doi.org/10.1017/s1743921308014749.

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AbstractThe observations of sunspot chromosphere are presented. The authors suggest the existence of two modes of propagating waves at the chromospheric level. The connection between these modes and magnetic field topology can be inferred from the analysis of mode propagation velocity and spatial localization. Two hypotheses are tested to explain the phenomenon: “Visual pattern” and “Trans-sunspot wave”.

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20

Zhuo, Rui, Jiansen He, Die Duan, Xingyu Zhu, and Chuanpeng Hou. "Oblique Compressible Waves in the Reconnection Exhaust Region Embedded in the Inner Heliospheric Current Sheet Observed by Parker Solar Probe." Astrophysical Journal 969, no. 1 (2024): 47. http://dx.doi.org/10.3847/1538-4357/ad4bd9.

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Abstract Magnetic reconnection is an important physical process of energy conversion in the heliosphere. Parker Solar Probe (PSP) passes through current sheets of the inner heliosphere and is likely to encounter magnetic reconnection events there. PSP traversed a magnetic reconnection exhaust region that occurred in the coronal streamer during its perihelion Encounter 8. We report an observation of the counterstream of strahl electrons and compressible waves in the exhaust region on the antisunward side of the reconnection site. We analyze the wave characteristics using electromagnetic singula

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21

Asgari-Targhi, M., A. Asgari-Targhi, and S. R. Habbal. "Magnetic Topology and the Structure of the Slow Solar Wind." Journal of Physics: Conference Series 2544, no. 1 (2023): 012003. http://dx.doi.org/10.1088/1742-6596/2544/1/012003.

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Abstract We present a 3D reduced magnetohydrodynamic (RMHD) model of reflection driven Alfvén wave turbulence in an open magnetic field positioned near the solar equator. The non-linear interactions between outward and inward propagating waves generate turbulence. The RMHD equations describing the turbulence include the effects of solar wind outflow velocity on the dissipation of waves. For Alfvén wave turbulence to be a viable mechanism for heating the corona and accelerating the slow solar wind, there must be sufficient counter-propagating waves to generate the turbulence. In our previous st

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22

Noguchi, Yuki, and Takayuki Yamada. "Level set-based topology optimization for programmable acoustic structures." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 7 (2023): 1001–8. http://dx.doi.org/10.3397/in_2023_0155.

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Controlling acoustic waves is essential in noise-reduction applications. Acoustic structures, which can efficiently manipulate acoustic waves based on their structural design, have been used to achieve the desired wave propagation behaviors. To meet various demands on sound propagation, it is crucial to design acoustic structures with multiple functionalities. In this research, we propose a level set-based topology optimization method for acoustic structures with desired acoustic performances that depend on their deformation. Firstly, we introduce a mathematical model that represents acoustic

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23

Deng, Yongbo, and Jan G. Korvink. "Self-consistent adjoint analysis for topology optimization of electromagnetic waves." Journal of Computational Physics 361 (May 2018): 353–76. http://dx.doi.org/10.1016/j.jcp.2018.01.045.

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24

Jensen, Jakob S. "Topology optimization problems for reflection and dissipation of elastic waves." Journal of Sound and Vibration 301, no. 1-2 (2007): 319–40. http://dx.doi.org/10.1016/j.jsv.2006.10.004.

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25

Egedal, J., and H. Bindslev. "Topology of relativistic refractive index surfaces for electron cyclotron waves." Plasma Physics and Controlled Fusion 36, no. 3 (1994): 543–59. http://dx.doi.org/10.1088/0741-3335/36/3/011.

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26

KAYANUMA, Tetsurou, and Garuda FUJII. "Controlling thermal waves of conduction and convection via topology optimization." Proceedings of OPTIS 2022.14 (2022): U00024. http://dx.doi.org/10.1299/jsmeoptis.2022.14.u00024.

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27

Xu, Jie, Hui Li, You-Ling zhou, et al. "Performance analysis of vortex acoustic wave based on uniform circular array." Journal of Physics: Conference Series 2078, no. 1 (2021): 012069. http://dx.doi.org/10.1088/1742-6596/2078/1/012069.

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Abstract As a carrier for information and energy, acoustic waves have been applied in underwater communication widely, however, the narrow band and low transmission speed are the main problems. Whether in the field of optics or electromagnetic waves, the orbital angular momentum (OAM) represents the natural properties of the spiral phase structure. By introducing the OAM into the acoustics field, the transmission capacity and spectrum efficiency of the underwater acoustic communication system can be expanded. Based on the analysis and detection of the vortex acoustic wave generated by the circ

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28

Altynnikov, Andrey, Roman Platonov, Andrey Tumarkin, Peter K. Petrov, and Andrey Kozyrev. "Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum." Coatings 11, no. 5 (2021): 569. http://dx.doi.org/10.3390/coatings11050569.

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A method for forming electromagnetic waves with a tunable nonzero orbital angular momentum (OAM) is proposed. The approach is based on transforming an incident plane wave into a helical one using an electrically tunable ferroelectric lens. It uses high-resistive thin/thick film electrodes with a special discrete topology. The correlation between film electrodes topology and the highest order of OAM modes that the lens can form is described. A lens prototype based on Ba0.55Sr0.45TiO3 ferroelectric material and operating at a frequency of 60 GHz was designed, manufactured, and tested. The amplit

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29

Kühnel, W., and H. B. Rademacher. "Conformal Geometry of Gravitational Plane Waves." Geometriae Dedicata 109, no. 1 (2004): 175–88. http://dx.doi.org/10.1007/s10711-004-2453-4.

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MIRANDA, ALEX S., and VILSON T. ZANCHIN. "GRAVITATIONAL PERTURBATIONS AND QUASINORMAL MODES OF BLACK HOLES WITH NON-SPHERICAL TOPOLOGY." International Journal of Modern Physics D 16, no. 02n03 (2007): 421–26. http://dx.doi.org/10.1142/s0218271807010201.

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In the present work we investigate the physical interpretation of gravitational perturbations of static asymptotically anti-de Sitter black holes with non-spherical topology. For zero wavenumber modes, the axial perturbations yield only small rotations on the system, while the polar perturbations lead to a change in the mass and may also produce gravitational waves. Additionally, it is verified that perturbations with any nonzero wavenumber are able to produce gravitational waves in these space–times. On the basis of these results, the quasinormal frequencies corresponding to polar perturbatio

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31

Prodanov, Dimiter. "Topology of Locally and Non-Locally Generalized Derivatives." Fractal and Fractional 9, no. 1 (2025): 53. https://doi.org/10.3390/fractalfract9010053.

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This article investigates the continuity of derivatives of real-valued functions from a topological perspective. This is achieved by the characterization of their sets of discontinuity. The same principle is applied to Gateaux derivatives and gradients in Euclidean spaces. This article also introduces a generalization of the derivatives from the perspective of the modulus of continuity and characterizes their sets of discontinuities. There is a need for such generalizations when dealing with physical phenomena, such as fractures, shock waves, turbulence, Brownian motion, etc.

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32

Tsukerman, Igor, and Vadim A. Markel. "Topology of Bloch impedance: traveling waves, dispersive media, and electromagnetic energy." Journal of Optics 27, no. 2 (2025): 025103. https://doi.org/10.1088/2040-8986/ada6d5.

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Abstract The bulk-boundary correspondence (b-bc) principle, which relates interface modes between two periodic structures to topological invariants of the respective Bloch bands, is widely accepted in electrodynamics. However, this acceptance stems largely from condensed matter (CM) theories. It is desirable to establish direct connections between the topological principles and Maxwell electrodynamics, rather than relying on CM results. Such connections have in recent years been found in the case of standing evanescent waves in periodic dielectric media. This paper extends these analyses to wa

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33

Prosovetsky, Dmitry. "Coronal waves in coronal loops during non-flare stage." Proceedings of the International Astronomical Union 4, S257 (2008): 245–49. http://dx.doi.org/10.1017/s1743921309029354.

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AbstractUsing SOHO/EIT Fe XII λ195 Å observations the new type of oscillations in coronal loops was detected. The oscillation corresponds to wave propagated to outer area of atmosphere of active area. As opposed to most kind of oscillations associated with coronal loops the waves are observed at non-flare stage of active areas evolution. Velocities of the wave propagation were 8-20 km s−1 and had quasi-perpendicular direction with magnetic field. Such waves were detected in active areas located on solar disk and loops structures outside solar limb. Investigation of EIT data shows the waves are

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34

FOURNIER, J. D., and S. GALTIER. "Meromorphy and topology of localized solutions in the Thomas–MHD model." Journal of Plasma Physics 65, no. 5 (2001): 365–406. http://dx.doi.org/10.1017/s002237780100887x.

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The one-dimensional MHD system first introduced by J.H. Thomas [Phys. Fluids 11, 1245 (1968)] as a model of the dynamo effect is thoroughly studied in the limit of large magnetic Prandtl number. The focus is on two types of localized solutions involving shocks (antishocks) and hollow (bump) waves. Numerical simulations suggest phenomenological rules concerning their generation, stability and basin of attraction. Their topology, amplitude and thickness are compared favourably with those of the meromorphic travelling waves, which are obtained exactly, and respectively those of asymptotic descrip

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Graf, Gian Michele, Hansueli Jud, and Clément Tauber. "Topology in Shallow-Water Waves: A Violation of Bulk-Edge Correspondence." Communications in Mathematical Physics 383, no. 2 (2021): 731–61. http://dx.doi.org/10.1007/s00220-021-03982-7.

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Marchesin, Dan, and C. Frederico B. Palmeira. "Topology of elementary waves for mixed-type systems of conservation laws." Journal of Dynamics and Differential Equations 6, no. 3 (1994): 427–46. http://dx.doi.org/10.1007/bf02218857.

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Ahn, Byungseong, Hyuk Lee, Joong Seok Lee, and Yoon Young Kim. "Topology optimization of metasurfaces for anomalous reflection of longitudinal elastic waves." Computer Methods in Applied Mechanics and Engineering 357 (December 2019): 112582. http://dx.doi.org/10.1016/j.cma.2019.112582.

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Noguchi, Y., T. Yamada, M. Otomori, K. Izui, and S. Nishiwaki. "An acoustic metasurface design for wave motion conversion of longitudinal waves to transverse waves using topology optimization." Applied Physics Letters 107, no. 22 (2015): 221909. http://dx.doi.org/10.1063/1.4936997.

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MYONG, R. S., and P. L. ROE. "Shock waves and rarefaction waves in magnetohydrodynamics. Part 1. A model system." Journal of Plasma Physics 58, no. 3 (1997): 485–519. http://dx.doi.org/10.1017/s002237789700593x.

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The present study consists of two parts. Here in Part 1, a model set of conservation laws exactly preserving the MHD hyperbolic singularities is investigated to develop the general theory of the nonlinear evolution of MHD shock waves. Great emphasis is placed on shock admissibility conditions. By developing the viscosity admissibility condition, it is shown that the intermediate shocks are necessary to ensure that the planar Riemann problem is well-posed. In contrast, it turns out that the evolutionary condition is inappropriate for determining physically relevant MHD shocks. In the general no

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Doss, M. Arun Noyal, K. Mohanraj, Sayantan Bhattacharjee, Maulik Tiwari, and Devashish Vashishtha. "Photovoltaic fed multilevel inverter using reverse voltage topology for standalone systems." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 3 (2019): 1347. http://dx.doi.org/10.11591/ijpeds.v10.i3.pp1347-1354.

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<span lang="EN-US">Multilevel Inverters are generally utilized for medium voltage and high power applications. Invented in 1975, MLIs have brought huge change in the field of Electrical and Electronics. It contains distinctive topologies. This paper proposes a photovoltaic aided multilevel inverter with Reverse Voltage topology with diminished number of switches. In comparison to other existing topologies this topology utilizes minimum number of switches and less number of carrier signals which in turns diminishes the complexity of the system as well as cost. The proposed framework conta

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Cheng, Xianming. "Injection signal coding based topology identification method and system for low voltage substation." Journal of Physics: Conference Series 2378, no. 1 (2022): 012067. http://dx.doi.org/10.1088/1742-6596/2378/1/012067.

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Abstract In view of the low efficiency and low reliability of the traditional topology identification method of distribution station area, this paper proposes a low-voltage station area topology identification method based on injection signal coding. The signal transceiver terminal sends the topology identification signal, which is composed of preamble, equipment ID number and characteristic code composed of multiple groups of characteristic waves. The rest of the signal transceiver terminals judge whether it is on the same branch and the hierarchical relationship through the characteristic co

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M., Arun Noyal Doss, Mohanraj K., Bhattacharjee Sayantan, Tiwari Maulik, and Vashishtha Devashish. "Photovoltaic fed multilevel inverter using reverse voltage topology for standalone systems." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 3 (2019): 1347–54. https://doi.org/10.11591/ijpeds.v10.i3.pp1347-1354.

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Abstract (sommario):

Multilevel Inverters are generally utilized for medium voltage and high power applications. Invented in 1975, MLIs have brought huge change in the field of Electrical and Electronics. It contains distinctive topologies. This paper proposes a photovoltaic aided multilevel inverter with Reverse Voltage topology with diminished number of switches. In comparison to other existing topologies this topology utilizes minimum number of switches and less number of carrier signals which in turns diminishes the complexity of the system as well as cost. The proposed framework contains five MOSFETs, five di

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Ghodake, Pravinkumar R. "Design optimization of metamaterials to control waves in cylindrical rods." Journal of the Acoustical Society of America 151, no. 4 (2022): A56. http://dx.doi.org/10.1121/10.0010642.

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Metamaterials can control different modes of waves by tuning their bandgap structures. Various design strategies are implemented to obtain desired responses of metamaterials by solving multiple forward problems using parametric sweeps, topology, and shape optimization problems. This study focuses on the design of cylindrical metamaterials to control wave propagation in a cylindrical rod using a shape optimization approach. Topology optimization requires relatively more computational resources and time as well as it also gives relatively complex structures in comparison with shape optimization.

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Rao, S. Nagaraja, D. V. Ashok Kumar, and Ch Sai Babu. "Implementation of Cascaded based Reversing Voltage Multilevel Inverter using Multi Carrier Modulation Strategies." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (2018): 220. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp220-230.

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Abstract (sommario):

In this paper, a cascaded based reversing voltage (CBRV) multilevel inverter structure is proposed inorder to compensate the major drawbacks in the conventional multilevel inverters. The proposed topology requires less number of components, less carrier signals and gate drives when compared to existing multilevel inverters particularly at higher levels. Therefore, the complexity and overall cost are greatly reduced particularly for higher output voltage levels. This paper also presents the most relevant control and modulation methods by a triangular based multi carrier pulse width modulation (

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45

Mirev, Andrey, Yovko Rakanov, Juliana Javorova, and Anton Andonov. "A topology of grid connected photovoltaic inverter with variable power factor." MATEC Web of Conferences 287 (2019): 08003. http://dx.doi.org/10.1051/matecconf/201928708003.

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Abstract (sommario):

By outlying renewable energy sources, the reactive electric power of local consumers at the same area must be carried by the grid. This loads and causes losses in the same grid. This can be avoided if the necessary reactive power is generated on the spot by the inverter. For that purpose is proposed and investigated a new modified topology for operating with variable power factor. Features of this topology are: transformerless connection to single-phase grid, symmetrical operation in both half waves and the presence of flying inductor, which eliminate the necessity from a separate boost conver

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46

HADZHIEV, BORISLAV, KATJA WINDT, WERNER BERGHOLZ, and MARC-THORSTEN HÜTT. "A MODEL OF GRAPH COLORING DYNAMICS WITH ATTENTION WAVES AND STRATEGIC WAITING." Advances in Complex Systems 12, no. 06 (2009): 549–64. http://dx.doi.org/10.1142/s0219525909002386.

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Abstract (sommario):

Recently, Kearns et al. [Kearns, M., Suri, S. and Montfort, N., An experimental study of the coloring problem on human subject networks, Science313 (2006) 824–827] studied the topology dependence of graph coloring dynamics. In their empirical study, the authors analyze, how a network of human subjects acting as autonomous agents performs in solving a conflict-avoidance task (the graph coloring problem) for different network architectures. A surprising result was that the run-time of the empirical dynamics decreases with the number of shortcuts in a Watts–Strogatz small-world graph. In a simula

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47

Ball, L. T. "Non-relativistic thermal effects on parallel-propagating ion cyclotron waves." Journal of Plasma Physics 38, no. 1 (1987): 117–38. http://dx.doi.org/10.1017/s0022377800012447.

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We investigate strictly non-relativistic thermal effects on the dispersion of lefthanded (LH) ion cyclotron waves (ICW's) with real frequency and complex wave vector, propagating parallel to a uniform ambient magnetic field. Changes to the topology of the cold-plasma dispersion relations in the vicinity of the ion gyrofrequencies are studied in plasmas consisting predominantly of protons with a small admixture of a heavy ion. The two branches of the LH mode reconnect near the heavy-ion gyrofrequency as the heavy-ion temperature is increased or its relative density is reduced. The reconnection

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48

Liu, Chen-Xu, and Gui-Lan Yu. "Deep learning-based topology design of periodic barrier for full-mode waves." Construction and Building Materials 314 (January 2022): 125579. http://dx.doi.org/10.1016/j.conbuildmat.2021.125579.

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49

Deymier, Pierre, and Keith Runge. "One-Dimensional Mass-Spring Chains Supporting Elastic Waves with Non-Conventional Topology." Crystals 6, no. 4 (2016): 44. http://dx.doi.org/10.3390/cryst6040044.

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50

Delplace, Pierre, and Antoine Venaille. "From the geometry of Foucault pendulum to the topology of planetary waves." Comptes Rendus. Physique 21, no. 2 (2020): 165–75. http://dx.doi.org/10.5802/crphys.28.

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