sound absorption in structural materials

... plays an important role in the development of Mechanical Engineering The thesis studies the English – Vietnamese translation of terms in the materials for Mechanical Engineering First, the thesis ... applied in the English-Vietnamese translation of terms in materials for mechanical engineering Hopefully, the result of the study would be useful in technical translation especially translation in ... translation in mechanical engineering, dictionaries editing, English language teaching as well as for the standardization of Vietnamese mechanical engineering terminology ...

Ngày tải lên: 07/09/2013, 13:04

... automotive engineering, as well as people working in infrastructure maintenance, monitoring, management and cost analysis of structures and infrastructures Some volumes are monographs defining the ... obtaining a value of Y in the interval [y = g(x), y + dy = g(x + dx)] is equal to the probability of obtaining a value of X in the interval [x, x + dx] (cf Fig 2.9) For monotonically increasing ... Before joining the University of Colorado, he worked for four years (1979–1983) in structural design with A Lipski Consulting Engineers in Brussels, Belgium In 1976, he received his doctorate in Applied...

Ngày tải lên: 12/01/2014, 22:04

... mechanical engineering In dictionaries editing, the editor may order mechanical engineering terms based on their structural features by classifying English mechanical engineering terms into the groups ... Vietnamese mechanical engineering terms, the author finds out that Vietnamese mechanical engineering terms can be classified into two main kinds: simple terms and complex terms In this part, the author ... Specifically combined words usually consist of a noun which plays the most important role in naming things, phenomena, processes in mechanical engineering, the other words in each specific word combination...

Ngày tải lên: 29/01/2014, 10:43

... protection materials discussed in these pages include the following: 1In January 2011 the National Materials Advisory Board (NMAB) and the Board on Manuacturing and Engineering Design combined to ... applications documented in the report Integrated Computational Materials Engineering.2 It can be focused on the most promising opportunities in lightweight protection materials, bringing such current ... brazing/soldering materials Development of adhesives and active brazing/ soldering materials and their processing methods to match the elastic impedance of current materials while minimizing...

Ngày tải lên: 05/03/2014, 12:20

Ngày tải lên: 08/03/2014, 12:20

Ngày tải lên: 08/03/2014, 16:20

Ngày tải lên: 27/03/2014, 12:21

... drops and the reflectivity increases as the incident fluence is increased since the free electron plasma density ␳ increases with increasing fluence leading to greater change in the dielectric constant ... temporal dependence of laser intensity inside the fused silica At the airsample interface, the transmitted and reflected field intensity is calculated by multiplying the incident intensity by the time-dependent ... proportional to the laser intensity as shown in Eq ͑4͒ because of the negligible free electron density, resulting in the slight increase in reflectivity When the laser fluence is further increased, the effect...

Ngày tải lên: 06/05/2014, 08:55

... calculated transmissivity allows determination of the absorption mechanisms in the laser-induced plasma The laser intensity used in this work is limited in the range between 90 MW/cm2 and 400 ... transmission signals when the laser intensity is at 163 MW/cm2 The reference signal is obtained by recording the probing signal going through the pinhole in the specimen (Fig 2) while the ablation ... intensities 483 In Fig 11, the absorption coefficients by inverse bremsstrahlung and photo-ionization are calculated using (2) and (1) The inverse-bremsstrahlung absorption coefficient, κIB , increases...

Ngày tải lên: 06/05/2014, 08:55

... technological processes in which interaction of sound and structural vibration is important Examples abound in marine, aeronautical, mechanical and nuclear engineering, in physiological processes, ... any line or point which becomes the line or point of plate discontinuity Classical point models use this possibility and formulate contact conditions in the midpoint of the obstacle 1.4.1 Point ... point models 1.4.1 Point models in two dimensions 1.4.2 Scattering by crack at oblique incidence 1.4.3 Point models in three dimensions 1.5 Scattering...

Ngày tải lên: 03/06/2014, 01:14

... Yalta, Ukraine from 19-23 September 2005 The lively discussion sessions in the evenings, unfortunately, could not be included in the proceedings but in some sense they were continued during a rigorous ... Kruchinin (eds.), Electron Correlation in New Materials and Nanosystems, 9–21 c 2007 Springer N CHANDRASEKHAR 10 measures, it is uncertain whether the integrity of the organic is maintained ... related materials S Akutagawa, T Muranaka, J Akimitsu Shape resonances in the interband pairing in nanoscale modulated materials A Bianconi, M Filippi, M Fratini, E Liarokapis, V Palmisano, N.L Saini,...

Ngày tải lên: 04/06/2014, 14:23

... complete spectrum of materials physics, including fundamental principles, physical properties, materials theory and design Recognizing the increasing importance of materials science in future device ... N N N N N N N N N N N N N pyridine pyridazine pyrimidine pyrazine triazine tetrazine 10 11 12 13 14 N N N N N 4,4'-bipyridine 2-methylpyrazine 15 16 N quinoxaline 17 Scheme 2.3 Selected N-Heterocycles ... and G Camino 90 Internal Friction in Metallic Materials A Reference Book By M.S Blanter, I.S Golovin, H Neuh¨ user, and H.-R Sinning a 98 Physics of Negative Refraction and Negative Index Materials...

Ngày tải lên: 04/06/2014, 15:02

... gases in porous media and also brings morphological information, in the case of amorphous materials, and structural information, in the case of crystalline and ordered materials Crystalline, ordered, ... electronic, mechanical, or other means, now known or hereafter invented, including photocopying, microfilming, and recording, or in any information storage or retrieval system, without written permission ... significant insight into the mechanism responsible for the analyzed problem [5,7,38] The first theory explaining Brownian motion was developed by Einstein in 1905 [36] Later, Langevin created another...

Ngày tải lên: 04/06/2014, 15:13

... report an experimental investigation on the photon absorption in Ge QDs (2 to 10 nm in size) embedded in silica, providing the thermal evolution of the absorption spectra in connection with the ... Ostwald ripening mechanism, similar to the Si QD case [33], leading to a size increasing of precipitates with a concomitant a-c transition occurring in the 600°C to 800°C range [20] The inset in Figure ... open triangles in Figure 5, revealing that after 800°C annealing, the DOS in Ge QDs involved in the light absorption (proportional to B) is strongly reduced to about one third, independently of...

Ngày tải lên: 21/06/2014, 05:20

... consists initially in obtaining a new integrated series Zi , i Zi = zj − z , (9) j =1 the average z being taken over all points, L z = zi L i=1 (10) After dividing the series into intervals, the points ... estimating the size of a discontinuity in a material by measuring the difference in time between ultrasonic signals scattering off the opposite tips of the discontinuity For welding-joint inspection, ... of α and H are obtained by averaging the slopes of all curves in the corresponding intervals, as shown by the solid lines 4.2 Welding Defects in Metals from TOFD Ultrasonic Inspection The TOFD...

Ngày tải lên: 21/06/2014, 16:20

... truncated accordingly In detector modelling, the training instances for the sound model are generated from the segments containing the target drum, and the remaining frames are used to train the “silence” ... train the “silence” model In combination modelling, the training instances for each combination are collected from the data, and the remaining frames are used to train the background model 2.3 ... combination modelling which was found to have problems with overfitting the limited amount of training data This was indicated by the following observations: performance degradation with increasing...

Ngày tải lên: 21/06/2014, 20:20

... ultra-long single-crystal ZnAl2O4 spinel nanotubes were fabricated through a spinel-forming interfacial solid-state reaction of core-shell ZnO–Al2O3 nanowires involving the Kirkendall effect [38] Singlecrystal ... top In situ Template Method Based on Chemical Etching Reaction Currently, the template-directed synthesis of functional materials is arousing increasing interest due to its unique advantages in ... reduce its interfacial energy Moreover, changes in the reaction energy and the height of reaction barriers inevitably accompany the wellknown increase in diffusion rate The increased interface...

Ngày tải lên: 22/06/2014, 01:20

... in parabolic potential approximation and their gap is increased with L1 This fact is explained by higher SQ portion in the particle energy One can see from Fig 2, with increasing of x¨ coordinate ... respectively, R0 is the intersection point of the circles and X-axes The motion of the charged particle in the plane of cross section is localized in the dashed area as it is shown in Fig 1b In the strong ... following well-known result: the transitions are allowed between the energy levels having quantum numbers in z-direction nz ¼ n0z ; in y-direction, n ¼ n0 and, different parity (see [8]) In the...

Ngày tải lên: 22/06/2014, 01:20

... direct inter-band light absorption inside SPEQDs in the strong SQ regime The absorption coefficient is given by the relation (20) In this particular case for the K and AE we obtained the following ... are growing when the magnetic field intensity is increased This is conditioned by growth of the magnetic quantization contribution into the CC energy increase Inter level distance is increased ... half-axis) obtained during the QD technological growth process So, for making the comparison the absorption coefficient should be multiplied by concentration of QDs Then, instead of the distinct absorption...

Ngày tải lên: 22/06/2014, 19:20

... reach the probing energy states lower to the initial excitation level providing the maximum coupling efficiency which results in the maximum induced change in the absorption Close examination of ... mechanism becomes more important with increasing probing wavelength for the 5-nm film (see amplitude component represented by parameter-A in Table 1) With increasing probing wavelengths, the decays appear ... carrier dynamics within the probing region [8] In this work, optical absorption fluence of *0.5 mJ/cm2 has been used to excite the nanocrystalline silicon films and determine its temporal behavior...

Ngày tải lên: 22/06/2014, 19:20