Results 231 to 240 of about 14,974 (268)

Aspects of change detection in vibrational processes based on time-frequency transforms

2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE), 2017
The 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.
openaire   +1 more source

On the correlation between bond-length change and vibrational frequency shift in halogen-bonded complexes

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, Yu, Zhang, Baoming, Ji, Anmin, Tian   +3 more
openaire   +2 more sources

Relation between Thermodynamic Property Change and Vibrational Frequency Shift in Ethyl Halides

Nature, 1966
RELATIONS can be found by plotting the difference of the ideal gas state thermodynamic properties ΔS° and ΔCp°; formed between the thermodynamic property values of ethane, C2H6, and its homologues, C2H5X (X = F, Cl, Br, I), against the corresponding C–X bond stretching and C–C–X bond bending frequencies in ethyl halide series (Fig. 1).
openaire   +1 more source

Equivalent damping and frequency change for linear and nonlinear hybrid vibrational energy harvesting systems

Journal of Sound and Vibration, 2011
Abstract A unified approximation method is derived to illustrate the effect of electro-mechanical coupling on vibration-based energy harvesting systems caused by variations in damping ratio and excitation frequency of the mechanical subsystem.
M. Amin Karami, Daniel J. Inman
openaire   +1 more source

Frequency shift or intensity shift? The origin of spectral changes in vibrational spectra

Vibrational Spectroscopy, 2012
Abstract It has been shown that the frequency shift for a single band can be reconstructed by a linear combination of contributions from adjacent bands with fixed positions. Assuming discrete distribution of the peaks in a specified spectral range and an appropriate response function one can generate diverse patterns of spectral changes.
openaire   +1 more source

Studying Nanoparticle-Induced Structural Changes within Fatty Acid Multilayer Films Using Sum Frequency Generation Vibrational Spectroscopy

Journal of the American Chemical Society, 2004
The nonlinear optical technique of sum frequency generation (SFG) vibrational spectroscopy has been used for the first time to study CdS nanoparticle/arachidic acid multilayer structures. Using a combination of per-deuterated and per-protonated arachidic acid, it is possible to study individual layers anywhere within the film, buried or on the surface.
Jasper, Holman, Shen, Ye, David J, Neivandt, Paul B, Davies   +3 more
openaire   +2 more sources

[Changes of vibration frequency due to root resorption of deciduous tooth].

Shoni shikagaku zasshi. The Japanese journal of pedodontics, 1992
The purpose of this study was to investigate the changes of vibration frequency of a deciduous tooth due to physiological root resorption. The author developed an analysis system for tooth vibration by applying an impact-hammer to the tooth. Peak frequency (Hz) of the tooth stimulated by the impact-hammer was observed by the analysis system.
openaire   +1 more source

The effect of vibration frequency on changes in the salt system of milk.

Communications in agricultural and applied biological sciences, 2014
This 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
openaire   +1 more source

Prototype Small Force Sensor Based on Resonant Frequency Change Using Piezoelectric Vibrator

The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec), 2023
Aoto YAMAZAKI, Takuma AKIDUKI, Atsuo HONNA, Michiteru KITAZAKI, Tomoaki MASHIMO   +4 more
openaire   +1 more source

Vasomotor changes in human skin elicited by high frequency low amplitude vibration

Acta Physiologica Scandinavica, 1985
C R, Skoglund, E, Knutsson
openaire   +2 more sources