Results 11 to 20 of about 514,857 (263)
Energies, 2020 In concentrated solar power technology, the precise shape of the reflective surfaces is crucial for efficiency. Considering the geometry and size of a parabolic trough collector, measuring the actual shape is not trivial and some techniques can only be ...
Gabriele Guidi +7 more
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Computer simulation for prediction of thermal distortion of JIS ADC12 flat-shape die-casting
Nihon Kikai Gakkai ronbunshu, 2014 A computer simulation method to predict the thermal distortion value of a high-pressure die cast part was investigated. The evaluated product was a flat-shape JIS ADC12 part. The actual distortion value of the part was measured by an optical 3D digitizer
Hiroshi YAMAGATA +3 more
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Sensors, 2020 In shape measurement systems using a grating projection method, the phase analysis of a projected grating provides accurate results. The most popular phase analysis method is the phase shifting method, which requires several images for one shape analysis.
Yoshiharu Morimoto
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Sensitivity of halo shape measurements
Astronomy & Astrophysics, 2023 Shape measurements of galaxies and galaxy clusters are widespread in the analysis of cosmological simulations. But the limitations of those measurements have been poorly investigated. In this Letter, we explain why the quality of the shape measurement does not only depend on the numerical resolution, but also on the density gradient.
Moritz S. Fischer, Lucas M. Valenzuela
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Advances and Prospects of Vision-Based 3D Shape Measurement Methods
Machines, 2022 Vision-based three-dimensional (3D) shape measurement techniques have been widely applied over the past decades in numerous applications due to their characteristics of high precision, high efficiency and non-contact.
Guofeng Zhang +3 more
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Task support equipment for correcting deformed bicycle wheel
Nihon Kikai Gakkai ronbunshu, 2015 A bicycle wheel consists of a hub, spokes, nipples and a rim. The rim deforms from true circle to irregular circle when a worker assembles the wheel. People can ride a bicycle in safety when the rim is the true circle.
Mitsuhiro MATSUMOTO
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Shape Measures for Triangles [PDF]
IEEE Transactions on Visualization and Computer Graphics, 2012 We compare a variety of triangle shape measures using concepts such as smoothness and convexity. We show that one of these measures, the elongation measure, lends itself to an intuitive geometric interpretation.
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Projective invariance and the measurement of visual shape
Methods in Psychology, 2023 The problem of measurement in psychology is as old as experimental psychology. One narrow domain of psychology is privileged, in that it admits an absolute scale: a ratio scale of measurement with a point of origin. That domain is the assessment of shape
Keith K. Niall
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Measuring Shapes with Desired Convex Polygons [PDF]
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2020 In this paper we have developed a family of shape measures. All the measures from the family evaluate the degree to which a shape looks like a predefined convex polygon. A quite new approach in designing object shape based measures has been applied. In most cases such measures were defined by exploiting some shape properties.
Jovisa Zunic, Paul L. Rosin
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Gaussian‐like measurement likelihood based particle filter for extended target tracking
IET Radar, Sonar & Navigation, 2023 Extended target tracking based on the star‐convex model is a multi‐dimensional nonlinear estimation problem. To approximate the shape of an extended target, the star‐convex model requires a higher‐order Fourier series expansion, which will increase the ...
Yiduo Liu, Hongbing Ji, Yongquan Zhang
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