lamb wave propagation in plates

Báo cáo sinh học: "Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and measurements" pot

Ngày tải lên : 18/06/2014, 22:20

... radio engineering tools to model the electromagnetic propagation in tunnels for radio planning and network tuning In this article, we propose an original method based on a Ray Launching method ... simulation is presented in Figure First step consists in extracting fast fading by using a running mean The window’s length is 40 λ on the first 50 m, and 100 λ elsewhere , according to the literature ... consists in a minimization of the path length, according to the Fermat Principle Finally, an adaptive IMR has been developed based on the localization of reflection points Results obtained in a straight...

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báo cáo hóa học:" Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and " potx

Ngày tải lên : 20/06/2014, 04:20

... radio engineering tools to model the electromagnetic propagation in tunnels for radio planning and network tuning In this article, we propose an original method based on a Ray Launching method ... simulation is presented in Figure First step consists in extracting fast fading by using a running mean The window’s length is 40 λ on the first 50 m, and 100 λ elsewhere , according to the literature ... consists in a minimization of the path length, according to the Fermat Principle Finally, an adaptive IMR has been developed based on the localization of reflection points Results obtained in a straight...

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Báo cáo toán học: " Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and measurements" docx

Ngày tải lên : 20/06/2014, 21:20

... calculation Using the Fermat Principle, indicating that the way followed by the wave between two points is always the shortest, we propose to reduce the geometrical approximation involved in each path ... simulation is presented in Figure First step consists in extracting fast fading by using a running mean The window’s length is 40 l on the first 50 m, and 100 l elsewhere, according to the literature ... consists in a minimization of the path length, according to the Fermat Principle Finally, an adaptive IMR has been developed based on the localization of reflection points Results obtained in a straight...

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A numerical study of wave propagation in poroelastic media by use of the localized differential quadrature (LDQ) method

Ngày tải lên : 26/09/2015, 09:39

... 50 Chapter Wave propagations in 2-D and 2-D holed poroelastic media by use of the LDQ method 61 4.1 General 61 4.2 Wave propagation in 2-D poroelastic media 62 4.3 Wave propagation in 2-D holed ... the propagation of plane, cylindrical and spherical Chapter Introduction waves in a fluid-saturated incompressible porous medium Based on Biot’s theory, most of the investigations on wave propagations ... statistically isotropic In this case the principal stress and principal strain directions coincide Taking into account the properties of symmetry of the material and using the invariance of tensor...

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Elastic stress wave propagation in cellular systems

Ngày tải lên : 05/10/2015, 19:03

... using Eqn (2-3) (a) Unplated ring chain (b) Plated ring chain Fig 2-9 Ring chains used in the experiments conducted by S R Reid et al [12] Table 2-1 Elastic wave speeds in mild steel ring chains ... constituting an interconnected network of struts or plates Many of these newer foams are increasingly used for insulation, as cushioning, and in systems for absorbing kinetic energy in impacts ... Elastic Wave Speed in a Single Ring by Impact Testing .32 §3.4 Determination of Wave Velocity in Ring Arrays… 37 §3.4.1 Experimental Procedure 37 §3.4.2 Results of Impact Tests on Ring...

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Báo cáo y học: "Prion propagation in vitro: are we there yet"

Ngày tải lên : 03/11/2012, 11:52

... robust in generating infectious prion particles than in vivo systems Nonetheless, prion strain properties of brain-derived PrPSc appeared to be conserved in the PMCA product by exhibiting indistinguishable ... expressed in tation, E.coli every Prion-infected crude brain homogenate PrP27-30 Purified PrPSc or crude homogenate of prion-infected brains Prion-infected crude brain homogenate rPrPC expressed in ... method to convert full-length rPrP encompassing residues 23-230 into amyloid fibrils by incubating in a 96-well plate with continuous agitation Combining the ThT fluorescence assay to this system...

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WAVE PROPAGATION THEORIES AND APPLICATIONS docx

Ngày tải lên : 15/03/2014, 23:20

... Shear Wave Propagation in Soft Tissue and Ultrasound Vibrometry Yi Zheng, Xin Chen, Aiping Yao, Haoming Lin, Yuanyuan Shen, Ying Zhu, Minhua Lu, Tianfu Wang and Siping Chen Chapter Acoustic Wave Propagation ... Haoming Lin, Yuanyuan Shen, Ying Zhu, Minhua Lu, Tianfu Wang and Siping Chen Department of Biomedical Engineering, School of Medicine, ShenZhen Univeristy, ShenZhen, China Xin Chen, Haoming Lin, ... Shear Wave Propagation in Soft Tissue and Ultrasound Vibrometry Yi Zheng, Xin Chen, Aiping Yao, Haoming Lin, Yuanyuan Shen, Ying Zhu, Minhua Lu, Tianfu Wang and Siping Chen Additional information...

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Báo cáo khoa học: " CONSTRAINT PROPAGATION IN KIMMO SYSTEMS" pdf

Ngày tải lên : 17/03/2014, 20:20

... than by trying out solutions to intertwined constraints We have begun exploring such methods in a preliminary and approximate way by implementing a modular, non-searching constraint -propagation ... constraints instead of being composed of independently derivable subparts There is little alternative to running through the possible cases in a combinatorial way In contrast to this picture, in ... lexical string (e.g t r y + a ) that is supplied as input Instead of considering the tuples in this space individually, the constraint -propagation algorithm summarizes whole sets of tuples in slightly...

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Báo cáo " A numerical model for the simulation of wave dynamics in the surf zone and near coastal structures " pot

Ngày tải lên : 28/03/2014, 15:20

... from the boundaries towards the ends of the wave absorbing zones. Finally, at the ends of the wave absorbing zones, the Summerfeld radiation condition for long waves are introduced to let remaining waves going out ... lost wave energy is transformed into turbulence energy. At the beginning of the wave breaking process, the turbulence is confined into a small portion of the breaking wave ... Coastal Engineering 34 (1998) 277. [14] H.A. Schaffer, P.A. Madsen, R. Deigaard, A Boussinesq model for waves breaking in shallow water, Coastal Engineering 20 (1993) 185. [15] F.C.K. Ting, J.T. Kirby, Observation of undertow ...

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The relationships of forest and watershed characteristics to soil water retention, storm, runoff, erosion, and wave attenuation in vietnam

Ngày tải lên : 03/04/2014, 12:22

... and nutrients in these environments They have a special role in stabilizing shorelines, minimizing wave damage, and trapping sediments However, in recent decades mangrove forests in Vietnam are ... relation to the index of increasing and deceasing flow rate Average elevation difference within a watershed is inversely significant with increasing and decreasing flow rate It explains about 28% of ... characteristics of incident waves (Massel et al., 1999; Alongi, 2008) The dissipation of wave energy inside mangrove forests is mostly caused by wave- trunk interactions and wave breaking (Luong et...

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elecromagnetic propagation in multi-mode random media

Ngày tải lên : 24/04/2014, 17:23

... in a retrieval system or transmitted in any form or by any means, electronic or mechanical, including uploading, downloading, printing, decompiling, recording or otherwise, except as permitted ... Single-Mode Input 4.2.2 Two-Mode Coherent Input 4.2.3 Two-Mode Incoherent Input 4.3 Power Fluctuations—Two-Mode Guide 4.3.1 Single-Mode Input 4.3.2 Two-Mode Coherent Input 4.3.3 Two-Mode Incoherent Input ... (3.49) j sin ck cos ck ∗ ∗ z cos ck ∗ z j sin ck cos ck z ∗ j sin ck · e− j sin ck · e− z z z ∗ cos ck ∗ j sin ck · e− cos ck · e− z cos ck · e− j sin ck · e− z j sin ck z j sin ck cos ck z j sin ck...

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Electronics Technician Volume 7 Antennas and Wave Propagation

Ngày tải lên : 27/05/2014, 02:43

... radio waves THE EARTH’S ATMOSPHERE IONOSPHERE While radio waves traveling in free space have little outside influence to affect them, radio waves traveling in the earth’s atmosphere have many influences ... knowledge of radiowave propagation to exercise good judgment when selecting transmitting and receiving antennas and operating frequencies Selecting a usable operating frequency within your given ... thin waveguide radiator Rather than a single focal point, this type of reflector has a series of focal points forming a straight line Placing the radiator, or radiators, along this focal line...

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