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MODE-LOCKED LASER PULSE SHAPES
Applied Physics Letters, 1970The pulse shape of a mode-locked continuously pumped Nd:YAG laser has been studied using an optical correlation technique. The shape is found to be Gaussian under stable conditions with the phase-modulator frequency tuned to the cavity-mode difference frequency.
Archibald W. Smith, Alfred J. Landon
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A neural mode shape identifier
Proceedings of 3rd International Symposium on Uncertainty Modeling and Analysis and Annual Conference of the North American Fuzzy Information Processing Society, 2002A first stage for a fuzzy neural active controller is developed. Neural network technology is utilized in the real time identification of the mode of vibration of any structural system under seismic loading. The parallel processing nature of neural networks fit the nature of multi degree of freedom systems.
M.H.M. Hassan, B.M. Ayyub
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Rewards shape attentional search modes
Visual Cognition, 2015Visual attention can be configured for specific stimulus features (feature search mode) or it can be non-specifically set for salient pop-outs (singleton detection mode). Additionally, monetary rewards have been shown to bias attention toward specific features, but it is unknown whether secondary reinforcers (images of US$) can shape global attention ...
Zachary J. J. Roper, Shaun P. Vecera
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Computers & Structures, 1989
Abstract Given an arbitrary modal matrix describing the vibrational displacements of a discrete, linear, undamped shear building, a theoretical solution is presented to find the mass and stiffness coefficients of the system; thereby reversing the usual vibration problem.
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Abstract Given an arbitrary modal matrix describing the vibrational displacements of a discrete, linear, undamped shear building, a theoretical solution is presented to find the mass and stiffness coefficients of the system; thereby reversing the usual vibration problem.
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Surface vibrational modes in disk-shaped resonators
Ultrasonics, 2014The natural frequencies and distributions of displacement components for the surface vibrational modes in thin isotropic elastic disks are calculated. In particular, the research is focused on even solutions for low-lying resonant vibrations with large angular wave numbers.
A V, Dmitriev +2 more
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Detection of Soliton Shape Modes in Polyacetylene
Physical Review Letters, 1986We observed soliton shape modes by photoinduced absorption in partially isomerized ${(\mathrm{CH})}_{x}$ and ${(\mathrm{CD})}_{x}$, coexisting with the soliton translational modes. The shape modes' ir activity, their dependence on the degree of isomerization, and the photoinduced spectra are explained in detail by a symmetry-breaking interaction which ...
, Vardeny +6 more
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Mode Shape Identification and Orthogonalization
AIAA Journal, 1988An identification procedure to improve the mass-weighted orthogonality of measured mode shapes is introduced. The procedure takes into account the degree of mode isolation present during measurement. This is accomplished by establishing a set of new mode shapes, from the measured vectors, that satisfy cross-orthogonality constraints and are a minimum ...
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Lyon Statistical Mode Shape Functions
SAE Technical Paper Series, 2017<div class="section abstract"><div class="htmlview paragraph">From 1983 to 1995, Richard H. Lyon published several papers on Statistical Phase Analysis, showing that the average phase of the transfer functions in complex systems grows with frequency in proportion to the modal density of the system.
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SAE Technical Paper Series, 2014
<div class="section abstract"><div class="htmlview paragraph">A finite element (FE) model of vibro-acoustic coupling analysis, such as a vehicle noise and vibration, is utilized for the improvement of the performance in the vehicle development phase. However, the accuracy of the analysis is not enough for substituting a prototype phase with
Hiromichi Tsuji +4 more
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<div class="section abstract"><div class="htmlview paragraph">A finite element (FE) model of vibro-acoustic coupling analysis, such as a vehicle noise and vibration, is utilized for the improvement of the performance in the vehicle development phase. However, the accuracy of the analysis is not enough for substituting a prototype phase with
Hiromichi Tsuji +4 more
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The mode shapes of a tennis racket and the effects of vibration dampers on those mode shapes
The Journal of the Acoustical Society of America, 2009The vibrational behavior of a tennis racket was studied using a speckle-pattern interferometry system. Specifically, the first 12 mode shapes of a racket are shown and discussed. In addition, the speckle-pattern interferometry system was used to compare the effects of four commercially available vibration damping systems.
Nicholas, Timme, Andrew, Morrison
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