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Semi-supervised visual clustering for spherical coordinates systems
Proceedings of the 2008 ACM symposium on Applied computing, 2008In this paper we propose a method that combines the advanced data analysis of the automatic statistical methods and the flexibility and manual parameter tuning of interactive visual clustering. We present the Semi-Supervised Visual Clustering (SSVC) interface; its main contribution is the learning of the optimal projection distance metric for the star ...
Boris Chidlovskii, Loïc Lecerf
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Evolution of Transient Electromagnetic Fields in Spherical Coordinate System
2006 International Conference on Mathematical Methods in Electromagnetic Theory, 2006Transient electromagnetic fields in infinite space filled with inhomogeneous in radial direction transient medium without losses are presented by spherical modes. The initial nonstationary three-dimensional electrodynamic problem is transformed into the problem for one-dimensional evolutionary equations by means of the construction of modal basis for ...
O. Dumin, O. Dumina, V. Katrich
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Euler Deconvolution in Cylindrical and Spherical Coordinate Systems
Proceedings, 2012Euler deconvolution is a commonly used technique for the semi-automatic interpretation of potential field data. In the two dimensional case the known quantities are the field strength f, its horizontal and vertical gradients, and the structural index N. The unknown quantities are deltax and deltaz, the distance from a given point to the source location
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Spherical-Coordinate-Based Guiding System for Automatic 3D Shape Scanning
Transactions of the Korean Society of Mechanical Engineers A, 2014Several types of automatic 3D scanners are available for use in the 3D scanning industry, e.g., an automatic 3D scanner that uses a robot arm and one that uses an automatic rotary table. Specifically, these scanners are used to obtain a 3D shape using automatic assisting devices.
Sang Wook Park +4 more
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Spherical coordinates control system for accurate orientation of directional antennas
2012 IEEE 18th International Symposium for Design and Technology in Electronic Packaging (SIITME), 2012In this paper is presented a novel implementation of a spherical coordinates control system intended to be used for dynamic orientation of communication antennas. The proposed control system is composed by three electronic modules: the interface with the computer, the motor drivers and the stepper motors with mechanical elements for antenna orientation.
Ioan Lita, Daniel Alexandru Visan
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Journal of Applied Mathematics and Mechanics, 1986
On the basis of relationships between particular solutions of the torsion equation in toroidal and spherical coordinates, the Fourier method is applied to the solution of torsion contact problems for elastic bodies bounded by coordinate surfaces of toroidal and spherical coordinate systems.
Protsenko, V. S. +2 more
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On the basis of relationships between particular solutions of the torsion equation in toroidal and spherical coordinates, the Fourier method is applied to the solution of torsion contact problems for elastic bodies bounded by coordinate surfaces of toroidal and spherical coordinate systems.
Protsenko, V. S. +2 more
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Admissible coordinate systems for static, spherically symmetric stellar models
General Relativity and Gravitation, 1977For static, spherically symmetric stellar models it is shown that imposing the condition that the determinant of the metrical coefficients takes on its flat space-time value everywhere is sufficient to ensure that the coordinates are admissible in the sense of Lichnerowicz.
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Joint rotation between two attitudes in the spherical rotation coordinate system
Journal of Biomechanics, 2004Three-dimensional joint rotation between two attitudes rather than starting from neutral position is the most common pattern of human movement. This paper presents a method for determining the joint rotations starting from a non-neutral attitude in the spherical rotation coordinate system based on a two-step rotation method.
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Algebraic Treatment of the MIC-Kepler System in Spherical Coordinates
Chinese Physics Letters, 2007The MIC-Kepler system is studied via the Milshtein–Strakhovenko variant of the so(2,1) Lie algebra. Green's function is constructed in spherical coordinates, with the help of the Kustaanheimo–Stiefel variables and the generators of the SO(2,1) group. The energy spectrum and the normalized wavefunctions of the bound states are obtained.
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A nomogram for solving spherical triangles and transforming astronomical coordinate systems
Journal of Geophysical Research, 1957By preparing bases for a Rude Star Finder with various astronomical coordinate systems on them, it is possible to convert points in the horizon system of altitude and azimuth into points in the astronomical system of right ascension and declination, or into points in the ecliptic and galactic systems of latitude and longitude.
Pierre St. Amand +3 more
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