Results 81 to 90 of about 107,717 (203)
Advanced methods for assessing sealing ability of valve seals
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2017 The paper deals with the processes that arise when sealing valve contact surfaces. A mathematical model of elastic contact is proposed that allows solving the problem of deformation of contacting surfaces with allowance for their rigidity by solving a ...
Yu. I. Kondrashov, R. N. Sergeev
doaj +1 more source
Studies in speckle interferometry [PDF]
, 1982 Initial studies were undertaken concerning laser speckle photography (sometimes called single-beam speckle interferometry) to obtain information about the technique and determine methods to enable specklegrams of high contrast and definition to be produced.
openaire +1 more source
Medição de tensões residuais com indentador instrumentado e interferômetro radial [PDF]
, 2012 Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia MecânicaEste trabalho envolve o aprimoramento e a avaliação de alguns aspectos de uma técnica de medição de tensões residuais ...
Reis, Frederico Aires Rodrigues da Costa
core
Single-axis combined shearography and digital speckle photography instrument for full surface strain characterization [PDF]
, 2005 Full characterization of the surface strain requires the measurement of six displacement gradient components of the surface strain tensor. The out-of-plane displacement gradient component may be directly measured using the full-field speckle ...
Fu, S. +3 more
core +1 more source
The Astronomical JournalThe large number of exoplanets discovered with the Transiting Exoplanet Survey Satellite (TESS) means that any observational biases from TESS could influence the derived stellar multiplicity statistics of exoplanet host stars. To investigate this problem,
Colin Littlefield +8 more
doaj +1 more source
Speckle Interferometry in Astrometry [PDF]
Symposium - International Astronomical Union, 1986 Speckle interferometry, which is characterised by diffraction limited resolution and enhanced accuracy, offers a wide range of possibilities for astrometry. Speckle applications are limited by the constraint of isoplanicity with the result that only differential rather than absolute astrometry can be carried out with the technique.
openaire +1 more source
Medição de tensões residuais por indentação associada à holografia eletrônica [PDF]
, 2005 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Tecnológico. Programa de Pós-Graduação em Engenharia MecânicaEste trabalho desenvolve e avalia um novo caminho para medir tensões residuais combinando a holografia eletrônica (ESPI ...
Suterio, Ricardo
core
Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements [PDF]
, 2008 We report the effects of self-mixing interference on gas detection using tunable diode laser spectroscopy. For very weak feedback, the laser diode output intensity gains a sinusoidal modulation analogous to that caused by low finesse etalons in the ...
Hodgkinson, Jane +2 more
core +1 more source
Speckle-based off-axis holographic detection for non-contact photoacoustic tomography
Current Directions in Biomedical Engineering, 2015 A very fast innovative holographic off-axis non-contact detection method for Photoacoustic Tomography (PAT) is introduced. It overcomes the main problems of most state-of-the-art photoacoustic imaging approaches that are long acquisition times and the ...
Buj C. +3 more
doaj +1 more source
ESPI nondestructive testing for coating interface failure
工程科学学报, 2016 A detection platform of coating failure processes was designed and constructed on the basis of laser electronic speckle pattern interferometry(ESPI).
GAO Jin +4 more
doaj +1 more source