Using three-dimensional laser scanner system to measure the Turtle Mountain Han tomb and obtained the point cloud. To the noise points and large holes on the surface, this paper first present an approach that based on the basic principle of least-squares to eliminate the noise points. Then on the basis that there is certain continuity between the holes and their surrounding surface, an approach...

Single image techniques may be very useful for heritage documentation purposes, not only in the particular instances of damaged or destroyed objects but also as auxiliary means for a basic metric reconstruction. In the general case, single images have unknown interior orientation, thus posing the fundamental question of camera calibration (as in several cases no ground control is available). To...

Polarization singularities, describing the points where state of polarization is indeterminate, reveal topology in vectorial optical fields, which include two-/three-dimensional topologies such as C-points, V-points, L-lines, Möbius strips, links, and knots. Compared with phase it has more parameters to manipulate, bring forth a series novel phenomena potential applications. In this Perspective...

Several basic classes of three-phase high-quality rectifiers are described. Both single-switch and six-switch three-phase rectifier topologies can be derived from parent dc-dc converters. Single-switch rectifiers are compared with the basic six-switch PWM rectifiers performing similar power conversion functions, using the measures of total semiconductor stress and active semiconductor utilizati...

This paper unifies the mathematical foundation of three multidimensional scaling algorithms: FastMap, MetricMap, and Landmark MDS (LMDS). All three algorithms are based on the Nyström approximation of the eigenvectors and eigenvalues of a matrix. LMDS is applies the basic Nyström approximation, while FastMap and MetricMap use generalizations of Nyström, including deflation and using more points...

Goryunov proved that the space of local invariants of Vassiliev type for generic maps from surfaces to three-space is three-dimensional. The basic invariants were the number of pinch points, the number of triple points and one linked to a Rokhlin type invariant. In this paper we show that, by colouring the complement of the image of the map with a chess board pattern, we can produce a six-dimen...

This paper presents a new three-dimensional continuous autonomous chaotic system with ten terms and three quadratic nonlinearities. The new system contains five variational parameters and exhibits Lorenz and Rossler like attractors in numerical simulations. The basic dynamical properties of the new system are analyzed by means of equilibrium points, eigenvalue structures. Some of the basic dyna...

Production of Metallogenic-prognostic map (MPM) was preceded by the preparation of instructions that define three phases of work: preparation (with preparation of the Project), realization of field and laboratory research and data processing with production of different maps and, finally, production of the prognostic map with the accompanying instruction book. During the Project realization, th...

in the present paper we study convolution properties for subclasses of univalent harmonic functions in the open unit disc and obtain some basic properties such as coefficient characterization and extreme points.