In this paper, we propose a pair of shape features for shape-similarity search of 3D polygonal-mesh models. The shape features are extension of the D2 shape functions proposed by Osada et al. [Osada01, Osada02]. Our proposed shape features are tolerant of topological variations and geometrical degeneracies. Our shape feature is also invariant to similarity transformation. Experiments showed tha...

Two kinds of wavelet features are proposed: (a) Kirsch edge enhancement based 2D wavelets and (b) 2D complex wavelets. The two sets of hybrid features are congregated by combining them with the geometrical features for the recognition of handwritten numerals. Experiments conducted on handwritten numeral recognition and verification show that the two hybrid feature sets can achieve high recognit...

The Raychaudhuri equation is derived by assuming geometric flow in space–time M of n+1 dimensions. turns into a harmonic oscillator form under suitable transformations. Thereby, relation between geometrical entropy and mean geodesic deviation established. This has connection to chaos theory where the trajectories diverge exponentially. We discuss its application cosmology black holes. Thus, we ...

This article presents the results of numerical and experimental studies on impacts selected geometrical features liquid solar collectors their thermal efficiency. The experiments were carried out while meeting requirements ISO 9806:2017 standard. Selected changes in analysed by using fully functional prototypes modified collectors. correlations between design performance properties determined a...

Abstract FGH95 nickel-base superalloy powders were coated on GH4169 by coaxial single-track laser cladding. The effects of process parameters cladding width and height studied based the three-factor three-level orthogonal experiment. experimental results are nonlinearly fitted MATLAB software, mathematical model between geometrical features is set up. show that effect factor clad in order first...