Kovalevsky v a (6 Ergebnisse)

Zustand: New. In English.

Paperback. Zustand: Fair. 127 p. Russian.

XVIII,426 S., kt. 2, N. (Int.Astronomical Union).

Zustand: New. In English.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - The driving idea, in organizing this Symposium on 'Relativity in Celestial Mechanics . and Astrometry' was that, in recent years, the ac curacy of several Astrometric techniques has so much increased that re lativistic effects are no more marginally mentioned in academic presen tations but have become an intrinsic part of the interpretation of all the positional data. Techniques such as V. L. B. I. , space probes, lunar lasers, etc . . . have greatly contributed to reduce the accuracy level to an angular equivalent of a few milliarc-seconds. HIPPARCOS will extend this trend to stellar astrometry and new proposals aim at gaining ano ther one or two orders of magnitude in observing precision. In paral lel, great progress has also been made in the theories of motion of ce lestial bodies and more rigourous treatments within the frame of general relativity become necessary. The definition of reference frames and of various coordinate times become also a major problem in the intercompa rison of observations produced by different methods. This Symposium gave to people using relativistic corrections in reducing their measurements or in constructing various theories of mo tion a chance to exchange their experience in the field and to confront it with theoreticians in general relativity. The Symposium was approved by the IAU in 1983 and it was organi zed by the Institute of Theoretical Astronomy of the USSR Academy of Sciences on May 28-31, 1985.…

Hardcover. Zustand: Fine. ix, 267 pp. ; illustrated with figures, photos and diagrams ; black cloth ; no dustjacket ; ex-lib, stamps, label, date due, pocket ; LCCN: 67-17216 ; Contents: The theory of character recognition -- The problem of character recognition form the point of view of mathematical statistics -- Spontaneous character differentiation -- On the correlation method of recognition -- On the effect of the number of indexes upon recognition reliability when determining the A priori probability of occurrence of classes with an error -- Experiments and calculations with the use of machines -- General purpose device for processing optical information by means of computers -- Algorithm for the recognition of typed symbols on the basis of ideal reference standards -- Calculation of the mutual correlation matrix of ideal reference standards -- Statistical research on the reliability of a character reader with optical correlation -- Designing of character readers -- On the accuracy of the calculation of correlation factors by the optical method -- On the selection of averaged reference standard patterns -- Character readers and their components -- Some works by foreign authors in the field of recognizing standard print -- Correlation-type character reader with shift register (ChARS) -- Character reader based on the principles of optical correlation -- Recognition of handwritten characters by means of a servo scan -- Sequential action correlation type character reader -- Designing extremum position indicators for correlation character readers -- Calculating and designing code voltage converters with diode keys -- Triode tube indicators of instant of voltage increase. ; "The nineteen articles in this collection focus on [pattern recognition] problems and computer simulation of various algorithms and recognition systems. All aspects of character recognition circuits and readers described here were developed at the Institute of Cybernetics, Academy of Sciences of the Ukrainian SSR.These problems first arose when it became evident to Soviet researchers that it would be useful to handle original documents without any encoding.all the work is strictly based on mathematically substantial procedures and methods used in the development of actual equipment at the Institute." ; covers the mathematics of OCR software and beginnings of the OCR scanner ; FINE. Book.…