transient waves in linear viscoelastic media

... Deformations in Rectilinear Elastic Links 81 Equations of Motion for Large Deformations in Rectilinear Elastic Links 4.1 Planar equations of motion The Dynamics of Viscoelastic Links 5.1 Application ... values for small aspect ratios Interestingly, the addition of a linear torsional stiffness, k^, to our sliding block model can lead to instability The resulting linearized equations of motion ... friction may dominate for contacting components whose relative sliding speed repeatedly fluctuates through zero In this section, the joint dynamics resulting solely from nonlinear interface stiffness...

Ngày tải lên: 17/02/2016, 14:35

... Convergence of Coordinate X (Point A) Figure 12b: Illustrative Diagram for Convergence of Coordinate Y (Point A) 12.60000 11.40000 12.50000 11.30000 11.20000 co o rd in ate y coo rdinate x 12.40000 ... Coordinate X (Point B) Figure 13b: Illustrative Diagram for Convergence of Coordinate Y (Point B) 11 Vietnam National Commission On Large Dams www.vncold.vn In figure 12a,b, Convergence of coordinate ... about using the computing principle of inverse problem by means of heat transfer and the numerical tool used in the Boundary Element Method The aim of this method is used to detect cracks in two-dimensional...

Ngày tải lên: 13/08/2014, 22:21

... electromagnetic waves in layered lossy and dispersive medium and after the physical forward modeling experiment, in chapter 7, the delamination in polished wall paintings by wall coupling antennas using ... explained in chapter 10 Problems in plasma physics at the conductivity, dielectric constants and refractive index were defined according to the media parameters In the recent years, by developing ... explosion in the research with metamaterials according to two different mathematical viewpoints Finally, in the last chapter, beamforming of antenna arrays focused in near field zone or intermediate-field...

Ngày tải lên: 19/06/2014, 19:20

... scattering wave in complex  that the problem of a finding I s is reduced to a finding of the scattered field Es The scattered field we shall find behind Kirchhoff method [16], and considering ... =1 (3) 32 Behaviour of Electromagnetic Waves in Different Media Will-be-set-by -IN- TECH and Structures Bearing in mind that the scattered field obtained during the iteration process depends on the ... containing two dielectric cylinders per section, one obtains the wavelength response in reflection coefficient as depicted in Fig 21b In this case, the aggregate T-matrix of a single section in the...

Ngày tải lên: 19/06/2014, 19:20

... two kinds of electromagnetic waves in uniaxial crystal; three kinds of electromagnetic waves in biaxial crystal and three kinds of distorted 72 Behaviour of Electromagnetic Waves in Different Media ... electromagnetic waves in monoclinic crystal Also for bi-anisotropic media, there exist two electromagnetic waves in Dzyaloshinskii’s bi-anisotropic media, and the electromagnetic waves in bi-anisotropic ... Electromagnetic Waves in Complex Media Electromagnetic waves in bi-anisotropic media 5.1 Bi-anisotropic constitutive equations The constitutive equations of bi-anisotropic media are the following (Lindellm...

Ngày tải lên: 19/06/2014, 19:20

... probe terminal surface The electromagnetic field Ers , Hϕs in the material measured can be expressed as the integral sum of all plane waves (including high-order mode) in spectral domain ∞ Ers ... in beam inlet and beam outlet make the electric field maintain fairly high intensity in the gap region through which the electron beam passes to interact with RF Figure also show scattering parameter ... has only output terminal as one port system The bold line is the real value of S and the thin line is the imaginary one The resonator frequency is 5.78 GHz in the absence of finite conductivity...

Ngày tải lên: 19/06/2014, 19:20

... Electromagnetic Waves in Different Media and Structures Fig Delaminated wall paintings in Cave 329 of Mogao Grottoes Fig Delaminated wall paintings in Eastern Audience Hall of Potala Palace Wall paintings in ... material paintings Chinese ancient wall paintings can be generally distinguished according to different drawing site, such as palace paintings, temple paintings, grotto frescoes, coffin chamber ... to investigate the area and the degree of wall painting delamination Traditionally, the diagnosis of delamination in grotto wall paintings and palace wall paintings is achieved by distinguishing...

Ngày tải lên: 19/06/2014, 19:20

... Electromagnetic Waves in Different Media and Structures It is shown in the interpretation results (Fig 27, Fig 28, Fig 29) that the delamination in wall paintings in the detection region is mainly located ... of Delamination in Wall Paintings by Ground Penetrating Radar 139 Fig 30 Comprehensive interpretation of delamination in wall paintings, marked by arc Conclusion Focusing on the propagation of ... Z Ma, Z Li, and Z Fan, Preliminary Detection of Grouting Effect on Delaminated Wall Paintings in Tibet Architecture, Chinese Journal of Rock Mechanics and Engineering, vol 28, supp 2, pp 3776-3781,...

Ngày tải lên: 19/06/2014, 19:20

... acceleration; III: Intravalley scattering; IV: Intervalley scattering; (b) ideal acceleration of electrons in bulk GaAs Taking advantage of the novel experimental method, invaluable information on ... (Zener tunneling) Such Zener tunneling process may limit the increase in νc In summary, the power dissipation spectra under step electric field in bulk GaAs in THz range have been investigated ... single layer The combined effect of gravitationally decreasing densities of neutral atoms and molecules and increasing intensity of ionizing solar ultraviolet radiation with increasing altitudes, gives...

Ngày tải lên: 19/06/2014, 19:20

... exposing to SAR=4(W/Kg) at 15 minutes can cause an increasing 1oC in human body when there is no cooling system like blood circulation [6] Considering a ∆T(Deg)= 1oC temperature increase in human ... engineering techniques for measuring the intensity of radiation is named EMF Dosimetry which would be discussed in the next section and some 214 Behaviour of Electromagnetic Waves in Different Media ... direction As an instance, for the 216 Behaviour of Electromagnetic Waves in Different Media and Structures following TEM wave, the wave propagation is in x-axes and we consider this wave as a linear vertical...

Ngày tải lên: 19/06/2014, 19:20

... EMF exposing clinical effects [17, 18] 3.2 Burning and shocking Burning or shocking can be seen by contacting to conductive materials inside of the EMF This effect can be separated from indirect ... than adults In addition, since they are in their growing age, their growth hormones are in high level, so any even low interfering to their organic system of adjusting hormones, remains the un-returnable ... line Fig shows the equivalent circuit of the SMC including the on-chip inverter Q1 Z1 A -z B C z D VDD RT Power line Q2 G Signal line Fig Equivalent circuit of the SMC including the on-chip inverter...

Ngày tải lên: 19/06/2014, 19:20

... unconfined phonons (fig.3) in both of the nonlinear and the linear absorption In fig.4, some of resonance peaks have changed these position These points are quite similar to case of confined phonons ... nonlinear absorption coefficient contains the quantum number m characterizing confined phonons When quantum number m characterizing confined phonons reaches to zero, the expression of the nonlinear ... show the nonlinear and the linear absorption coeffcients in quantum wells in the presence of an external magnetic field for the case of confined electron - optical phonon scattering The dependence...

Ngày tải lên: 19/06/2014, 19:20

... is intrinsically right-handed, a particle which is intrinsically left-handed, or, by taking a linear combination of solutions, a particle such as the electron that has no intrinsic chirality In ... nonlinear absorption coefficient of a strong electromagnetic wave in a cylindrical quantum wire Eq.(30), we obtain the explicit expression of the nonlinear absorption coefficient α in cylindrical ... Electromagnetic Waves in Different Media and Structures Fig 17 The dependence of nonlinear absorption coefficient on R and m,k in case confined phonons Fig 18 The dependence of nonlinear absorption...

Ngày tải lên: 19/06/2014, 19:20

... Babinet’s principle can be invoked to obtain the propagation characteristics of an infinitely thin patch array As it has been indicated earlier, the reflection coefficient of an in nitely thin ... obtained at the onset of propagation that gives rise to the ET, as explained in (Beruete et a., 2007; Medina et al., 2008) and in the text below From this platform and invoking once again Babinet’s ... Waves in Different Media and Structures lossless small patch array obtained by interchanging air and metal in the previous hole array can be obtained from those of the hole array by considering...

Ngày tải lên: 19/06/2014, 19:20

... form of LDE must contain infinite terms The 360 Behaviour of Electromagnetic Waves in Different Media and Structures present method reducing the order of LDE contains infinite terms of τ at each ... zero-point radiation is Lorentz invariant indicating there is no preferred frame Thermal radiation involves radiation above the zero-point spectrum and involves a finite amount of energy and singles ... should keep in mind that Landau and Lifshitz equation (LLE) gaining the 354 Behaviour of Electromagnetic Waves in Different Media and Structures advantages over LDE is at the price of losing the...

Ngày tải lên: 19/06/2014, 19:20

... Electromagnetic Waves in Different Media and Structures In order to obtain internal information from the outside, the detecting “probe” must be inserted For a solid material, it is not possible to insert ... of solid insulating materials The dielectric strength of insulating materials generally increases in the order of gas < liquid < solid, but from the viewpoints of the selfrecovery of insulation ... being examined THz wave techniques are expected to be applied in a wide range of areas in the future 2.1 Transmission probability of THz wave for solid insulating materials Most solid insulating...

Ngày tải lên: 19/06/2014, 19:20

... signal level in FFZ of FAA can be obtained since FAA is focused in points of minimum signal level 428 Behaviour of Electromagnetic Waves in Different Media and Structures when it is focused in FFZ ... before in this section, FAA directivity can be improved by increasing element spacing jointly with using directed array elements (Hansen, 2009) or exciting wideband signal jointly with increasing ... approach that better reveals the principles of FAA radiation pattern forming, including FAA beamforming with 420 Behaviour of Electromagnetic Waves in Different Media and Structures various radiators...

Ngày tải lên: 19/06/2014, 19:20

... angular directivity in FFZ ratio is introduced in this chapter FAA directivity can be improved by increasing array elements spacing jointly with grating focal area supressing or by excitation ... Behaviour of Electromagnetic Waves in Different Media and Structures Conclusion In this chapter, beamforming of antenna arrays focused in NFZ or IFZ is studied and the new principles of this process ... coordinate are equal too The main focusing properties of antenna array are based on principle of inversion of the Fresnel and the Fraunhofer diffraction fields which is the result of focusing...

Ngày tải lên: 19/06/2014, 19:20

... part” and a nonlinear “reaction part.” However, Advances in Difference Equations the reaction part consists of a quadratic polynomial so that the investigation is reduced to a linear and homogeneous ... all i ∈ Z, if, and only a − b sin 2ikπ ξ 2ikπ ξ 2ijπ ξ c − d sin 2ikπ ξ 3.10 2ijπ a − b cos − a ξ 2ηjπ sin ξ ξ 1 ξ sin 2ηkπ ξ c − d cos 2ikπ − c ξ 2ijπ b sin ξ d sin 2ikπ ξ By 3.3 and 3.5 , we ... k,ξ ξ−k,ξ , cu du and −cu du are linear independent Hence we have that η au is a period of u if and only if cos 2ηjπ −1 ξ cos 2ηkπ −1 ξ sin 2ηjπ ξ sin 2ηkπ ξ 3.13 In other words, η is a period of...

Ngày tải lên: 21/06/2014, 20:20