作者: Exploit 時間: 2025-3-21 21:59
Locally Resonant Structures for Low Frequency Surface Acoustic Band Gap Applications,ubstrate. Through the computation of the acoustic band diagram and transmission spectra of periodic pillars arranged in different symmetries, we show that these structures possess acoustic metamaterial features for surface acoustic waves. The pillars on the top of the surface introduce new guided mo作者: Glucocorticoids 時間: 2025-3-22 01:36
Band-Gap Properties of Prestressed Structures,lastic metamaterials. In these structures prestress has a strong influence, ‘shifting’ in frequency, but also ‘a(chǎn)nnihilating’ or ‘nucleating’ band gaps. The effects of prestress are demonstrated with examples involving flexural waves in periodic and quasiperiodic beams and periodic plates. Results hi作者: shrill 時間: 2025-3-22 07:04 作者: 沙漠 時間: 2025-3-22 12:25 作者: laxative 時間: 2025-3-22 13:56
Subwavelength Focussing in Metamaterials Using Far Field Time Reversal,m. Time reversal mirrors have been demonstrated first in acoustics, then with electromagnetic waves, and are being intensively studied in many fields ranging from underwater communications to sensing. In this chapter we review the principles of time reversal and in particular its ability to focus wa作者: 吃掉 時間: 2025-3-22 20:33
Anisotropic Metamaterials for Transformation Acoustics and Imaging,d engineering flexibility opens up a wide range of applications and provides an effective route in molding the flow of energy. By drawing analogies between electromagnetic and acoustic wave frameworks, many concepts like invisibility cloaking and subwavelength imaging can be transplanted from electr作者: 抗生素 時間: 2025-3-23 01:14 作者: Invertebrate 時間: 2025-3-23 01:58 作者: debble 時間: 2025-3-23 07:47 作者: 劇毒 時間: 2025-3-23 09:44
Cloaking Liquid Surface Waves and Plasmon Polaritons,r to control their trajectories using geometric transforms. These two routes towards cloaking are emerging areas of physics known as transformational acoustics and plasmonics. We first analyze cloaking of LSWs propagating through a circular cloak, which consists of concentric layers cut into a large作者: 簡潔 時間: 2025-3-23 15:06
Transformation Elastodynamics and Active Exterior Acoustic Cloaking,rdinate transformations to manipulate waves propagating in an elastic material. Then we study the effect of transformations on a mass-spring network model. The transformed networks can be realized with “torque springs”, which are introduced here and are springs with a force proportional to the displ作者: 驕傲 時間: 2025-3-23 21:43
,Acoustic Metamaterials for?Sub-wavelength, Broadband, and?Perfect Absorption in Ventilated Problemsoblems, i.e., accounting for both reflected and transmitted waves. We discuss the problem of perfect acoustic?absorption both in the reflection and ventilated problems reviewing the different acoustic metamaterials?described in the literature to achieve these two goals. The general one-dimensional r作者: Fibrin 時間: 2025-3-24 00:37 作者: CYT 時間: 2025-3-24 03:01
Phononic Subsurfaces: Phononic Crystals and Metamaterials for Passive Flow Control,low. This is enabled by attaching a finite phononic structure perpendicular to an elastic?surface exposed to a flowing fluid. This structure, called a . (PSub), experiences ongoing excitation by an unstable flow mode, or more than one mode, travelling in conjunction with the mean flow. The excitatio作者: TOXIC 時間: 2025-3-24 07:16 作者: Tincture 時間: 2025-3-24 13:12 作者: addition 時間: 2025-3-24 17:22
Waves Over a Periodic Progressive Modulation: A , Tutorial,on one-dimensional spring-mass?chains whose properties are modulated in space and time in a periodic?progressive fashion. The chapter is written for the uninitiated newcomer as well as for the theoretically inclined numerical empiricist. Thus, whenever possible, deployed theory is motivated and expl作者: 明智的人 時間: 2025-3-24 21:55 作者: Saline 時間: 2025-3-25 02:19
Umsetzung digitaler Gesch?ftsmodelle show how anisotropic metamaterials can be constructed to control the constitutive parameters of the effective medium through positioning hard plates in different preferred directions. We will then use them to construct an acoustic carpet cloak, an acoustic hyperlens and a superlens as examples.作者: 清醒 時間: 2025-3-25 03:40
Fundamentals of Acoustic Metamaterials,ics behind the physical scene are illustrated by numerical simulations including cloaking, absorption,?lensing and confinement effects via artificial anisotropy (motivated by transformational optics and acoustics), negative refraction and slow waves.作者: 離開可分裂 時間: 2025-3-25 08:00
Anisotropic Metamaterials for Transformation Acoustics and Imaging, show how anisotropic metamaterials can be constructed to control the constitutive parameters of the effective medium through positioning hard plates in different preferred directions. We will then use them to construct an acoustic carpet cloak, an acoustic hyperlens and a superlens as examples.作者: 酷熱 時間: 2025-3-25 14:12 作者: 刺激 時間: 2025-3-25 16:21
Informationssysteme für das Managementf recent progress in the discovery of topological phenomena in acoustics and the associated underlying realizations, ranging from simple one-dimensional analogues of the Su–Schrieffer–Heeger model to Chern insulators, spin-Hall insulators, valley-Hall insulators, Weyl semimetals, and higher order TIs.作者: Myosin 時間: 2025-3-25 21:53
0933-033X t theoretical and numerical results on negative refraction, .The revised edition of this book offers an expanded review of acoustic metamaterials; novel materials which can manipulate sound waves, surface Rayleigh waves and water waves, in surprising ways, which include collimation, focusing, negati作者: SPURN 時間: 2025-3-26 02:01 作者: 震驚 時間: 2025-3-26 07:14
Datendarstellung und -verarbeitungsing transformation acoustics. After briefly describing some theoretical offshoots from the original idea, we conclude with a summary of approaches for engineering composite materials with the smoothly inhomogeneous and anisotropic properties needed for many transformation acoustics devices.作者: 柳樹；枯黃 時間: 2025-3-26 09:13 作者: contrast-medium 時間: 2025-3-26 13:37 作者: HUMID 時間: 2025-3-26 19:47 作者: ANTE 時間: 2025-3-27 00:59 作者: 細(xì)頸瓶 時間: 2025-3-27 01:21 作者: Torrid 時間: 2025-3-27 08:26 作者: 到婚嫁年齡 時間: 2025-3-27 13:00 作者: Adj異類的 時間: 2025-3-27 15:28
Betriebliche Informationssysteme,te. This chapter lays out a framework encompassing theoretical and experimental results, and in which inverse scattering and modern array technology can be combined together to achieve super-resolution, quantitative imaging.作者: backdrop 時間: 2025-3-27 21:22 作者: 芭蕾舞女演員 時間: 2025-3-27 23:10
Rechnersysteme und systemnahe Softwareently introduced, paying special attention to slow-sound?systems. Finally, two examples of acoustic?metamaterials based on these acoustic metamaterials are shown, exhibiting perfect absorption either with or without mirror symmetry.作者: characteristic 時間: 2025-3-28 02:17
Ultrasound Transmission Through Periodically Perforated Plates,d by the mass law is observed. Finally, we find a strong interplay between Wood anomaly minima and intrinsic plate modes (Lamb modes), which results in fundamentally unique behavior of sound as compared to light.作者: 表示向下 時間: 2025-3-28 09:14 作者: 記憶 時間: 2025-3-28 13:41
Acoustic Cloaking via Homogenization,plates cylindrically corrugated. We also propose solutions to remove the divergences appearing in the design of cloaking shells. It is therefore predicted that, although difficult to realize, cloaking shells are not impossible by using metafluids based on the homogenization of periodic structures.作者: 刺穿 時間: 2025-3-28 15:19
,Acoustic Metamaterials for?Sub-wavelength, Broadband, and?Perfect Absorption in Ventilated Problemsently introduced, paying special attention to slow-sound?systems. Finally, two examples of acoustic?metamaterials based on these acoustic metamaterials are shown, exhibiting perfect absorption either with or without mirror symmetry.作者: 宇宙你 時間: 2025-3-28 19:16
Book 2024Latest editionigh waves and water waves, in surprising ways, which include collimation, focusing, negative refraction,?passive and active cloaking, sonic screening and extraordinary transmission. It covers both experimental and theoretical aspects of acoustic and elastic waves propagating in structured composites作者: Charade 時間: 2025-3-29 00:34
Book 2024Latest editionand metasurfaces including acoustic impedance gratings and mirror symmetric metamaterials, phononic subsurfaces, time-modulated and topological crystals. The latter two are illustrated by simple Python program examples.??..The broad scope gives the reader an overview of the state of the art in acous作者: 異端邪說2 時間: 2025-3-29 06:04 作者: 地牢 時間: 2025-3-29 08:56 作者: HPA533 時間: 2025-3-29 13:08 作者: 怒目而視 時間: 2025-3-29 18:40
Enterprise-Resource-Planning-Systemeor cloaking problem for the Laplace equation is reformulated as the problem of polynomial approximation of functions. An explicit solution is given that allows cloaking of larger objects at a fixed distance from the cloaking device, compared to previous explicit solutions. In the third part we consi作者: Bph773 時間: 2025-3-29 20:09 作者: glomeruli 時間: 2025-3-30 01:24
Grundkurs Wirtschaftsinformatik surface and subsequently to their attenuation over the spatial extent of the control region. This entire mechanism is passive and is engineered offline without the need for coupled fluid-structure simulations; only the frequency?and modal nature of the flow instability must be known. Disturbance st作者: 開始沒有 時間: 2025-3-30 04:27
Funktionsbegriff und Funktionseigenschaften. Moreover, the factorization allows to reduce the computational complexity of dispersion?diagrams and of long term behaviors. Chosen simulations illustrate salient features of non-reciprocity such as strong left-right biases in the speed and power of propagated waves.作者: 蚊子 時間: 2025-3-30 09:29 作者: Mri485 時間: 2025-3-30 15:11 作者: acrobat 時間: 2025-3-30 17:22
Subwavelength Focussing in Metamaterials Using Far Field Time Reversal,this original approach. Those results are explained in terms of the coherent excitation of subwavelength modes. In particular, we show that a finite size medium consisting of coupled subwavelength resonators, which we call a resonant metalens, supports modes which radiate spatial information of the 作者: effrontery 時間: 2025-3-30 21:45 作者: BARB 時間: 2025-3-31 02:39 作者: 上釉彩 時間: 2025-3-31 07:17
Acoustic Surface Waves on Metasurfaces,ments of the acoustic surface waves?supported on a simple 2D array?of open-ended cavities. We show that the metasurface array supports a highly anisotropic?surface wave?over a narrow frequency?band, which leads to the ‘a(chǎn)coustic beaming’ phenomenon, where acoustic power flow is confined to specific a作者: eczema 時間: 2025-3-31 11:14
Phononic Subsurfaces: Phononic Crystals and Metamaterials for Passive Flow Control, surface and subsequently to their attenuation over the spatial extent of the control region. This entire mechanism is passive and is engineered offline without the need for coupled fluid-structure simulations; only the frequency?and modal nature of the flow instability must be known. Disturbance st作者: 不透明性 時間: 2025-3-31 17:01
Waves Over a Periodic Progressive Modulation: A , Tutorial,. Moreover, the factorization allows to reduce the computational complexity of dispersion?diagrams and of long term behaviors. Chosen simulations illustrate salient features of non-reciprocity such as strong left-right biases in the speed and power of propagated waves.作者: Enervate 時間: 2025-3-31 20:20
Richard Craster,Sébastien GuenneauPresents an updated overview of the state of the art in acoustic metamaterials and their applications.Offers a comprehensive review of recent theoretical and numerical results on negative refraction, 作者: 廢墟 時間: 2025-3-31 23:03
Springer Series in Materials Sciencehttp://image.papertrans.cn/b/image/167120.jpg作者: 虛弱的神經(jīng) 時間: 2025-4-1 04:08
