Results 221 to 230 of about 14,988 (268)
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Role of frequency changes in vibrational energy transfer
Chemical Physics Letters, 1984Abstract The interaction potential energy term quadratic in vibrational coordinate is shown to cause a disturbance in vibrational frequencies during the ...
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Vibration-based delamination detection in composite beams through frequency changes
Journal of Vibration and Control, 2014Delamination is a common damage in fibre reinforced composite laminates, usually hidden from external view, that can substantially reduce the structural stiffness which changes the dynamic response of the structures such as natural frequencies. Natural frequencies are the most reliable parameters for detecting damage while they do not directly provide
Zhifang Zhang +3 more
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Canadian Journal of Chemistry, 1951
An expression for the change in vibrational frequency in terms of changes in the kinetic and potential energy of a molecule has been derived.For numerical calculations approximations are given. The change in frequency due to configurational changes has also been estimated in a qualitative manner.
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An expression for the change in vibrational frequency in terms of changes in the kinetic and potential energy of a molecule has been derived.For numerical calculations approximations are given. The change in frequency due to configurational changes has also been estimated in a qualitative manner.
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International Applied Mechanics, 1998
A study is made of the effect of the laws governing changes in the frequency and amplitude of a disturbing load applied to a pinned cylindrical shell on unsteady vibrations of the shell. The results of the study are also presented.
I. Ya. Amiro, N. Ya. Prokopenko
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A study is made of the effect of the laws governing changes in the frequency and amplitude of a disturbing load applied to a pinned cylindrical shell on unsteady vibrations of the shell. The results of the study are also presented.
I. Ya. Amiro, N. Ya. Prokopenko
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Altering structures to move vibration frequencies using acceptable changes
International Journal of Solids and Structures, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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The effect of vibration frequency on changes in the salt system of milk.
Communications in agricultural and applied biological sciences, 2014This paper presents a model study into the effect of varied frequencies (10-60 Hz) of vertical and horizontal vibrations at a constant acceleration of 1g for 60-min. exposures on the changes in the salt system of milk. It was found that the tendencies of changes in the salt system of milk under vertical and horizontal vibrations are similar and are ...
M, Warmi ska, A, Kruk, W, Brandt
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Influence of low-frequency vibration on changes of biochemical parameters of living rats
The Journal of the Acoustical Society of America, 2004The aim of the research was to investigate how some selected biochemical parameters of living rats depend on exposure of low-frequency vibrations. Experiments were run on 30 Wistar rats randomly segregated into three groups: (I) 20 days old (before puberty), (II) 70th day after; (III) control group.
Cezary Kasprzak +2 more
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The Journal of Chemical Physics, 2011
The C-Hal (Hal = Cl, Br, or I) bond-length change and the corresponding vibrational frequency shift of the C-Hal stretch upon the C-Hal ⋯Y (Y is the electron donor) halogen bond formation have been determined by using density functional theory computations.
Weizhou, Wang +3 more
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The C-Hal (Hal = Cl, Br, or I) bond-length change and the corresponding vibrational frequency shift of the C-Hal stretch upon the C-Hal ⋯Y (Y is the electron donor) halogen bond formation have been determined by using density functional theory computations.
Weizhou, Wang +3 more
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The Journal of Physical Chemistry B, 2005
The chemical characteristics of the polar parts of phospholipids as the main components of biological membranes were investigated by using infrared (IR) spectroscopy and theoretical calculations with water as a probe molecule. The logical key molecule used in this study is methylphosphocholine (MePC) as it is not only a representative model for a polar
E, Mrázková +4 more
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The chemical characteristics of the polar parts of phospholipids as the main components of biological membranes were investigated by using infrared (IR) spectroscopy and theoretical calculations with water as a probe molecule. The logical key molecule used in this study is methylphosphocholine (MePC) as it is not only a representative model for a polar
E, Mrázková +4 more
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Aspects of change detection in vibrational processes based on time-frequency transforms
2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE), 2017The main goal of the work is to present some aspects in using time-frequency transforms, applied to the vibration signals and for change detection purposes, from signal processing point of view. The processed object is the time-frequency image (TFI), as result of the time-frequency transform.
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