Results 261 to 270 of about 2,986,195 (299)

Astronomy in the Time Domain

Science, 2011
Coordination between various instruments provides a real-time aspect to observing transient astrophysical events.
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Optical time domain reflectometer

Applied Optics, 1977
By using an optical time domain reflectometer a new measurement technique which allows displaying the length dependence of the fiber attenuation by analyzing backscattered light has been developed. This paper compares the backscatter and insertion-loss techniques.
M K, Barnoski, M D, Rourke, S M, Jensen, R T, Melville   +3 more
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Time-domain Oustaloup approximation

2015 20th International Conference on Methods and Models in Automation and Robotics (MMAR), 2015
Paper presents a new method for implementing Oustaloup approximation of non-integer order systems in digital environment. Classical method and its limitations are presented and discussed. Method of realization is formulated and schemes for discretization are presented. Operation of method is illustrated with two examples.
Jerzy Baranowski, Waldemar Bauer, Marta A. Zagorowska, Tomasz Dziwinski, Pawel Piatek   +4 more
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Time domain right invertibility

2006 American Control Conference, 2006
Generalized systems (also called implicit, descriptor, etc.) usually offer more possibilities for solving control and observation problems. In this context, we use an important tool of System Theory, namely right invertible systems. In this paper we consider some possible dualizations results on time domain left invertibility and point out which ...
Moisés E. Bonilla, Michel Malabre, Maricela Figueroa Garcia   +2 more
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Nonlinear time-domain modeling by multiresolution time domain (MRTD)

IEEE Transactions on Microwave Theory and Techniques, 1997
A multiresolution time-domain (MRTD) scheme based on the expansion in scaling functions is applied to the modeling of nonlinear pulse propagation. Appropriate absorbers for the MRTD scheme are presented and their performance is discussed. The differences using pulse functions and nonlocalized basis functions like the Battle-Lemarie scaling functions ...
M. Krumpholz, H.G. Winful, L.P.B. Katehi
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Edge magnetoplasmons in the time domain

Physical Review B, 1992
We have studied edge magnetoplasmons (EMP's) created by pulses of 100 ps width in a high-mobility two-dimensional electron gas, using a cryogenic transistor. We find that magnetoplasmon motion along the edge occurs only in the direction expected for negatively charged electrons; there is no hint of propagation in the opposite direction expected for ...
, Ashoori, , Stormer, , Pfeiffer, , Baldwin, , West   +4 more
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Time-domain cepstral transformations

IEEE Transactions on Signal Processing, 1993
The realization of homomorphic systems for convolution is addressed, motivated by the limitations of the Fourier-transform-based method commonly used in homomorphic (complex cepstral) filtering. The time-domain cepstral transformation (TDCT) method, which is entirely based on time-domain calculations, thus avoiding or minimizing the problems associated
Radomir T. Sokolov, James C. Rogers
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Time domain approximations in the solution of fields by time domain diakoptics

International Journal for Numerical Methods in Engineering, 1982
AbstractThe numerical solution of field substructures in time domain diakoptics requires an interation time consistent with the numerical accuracy required. When storing and reconnecting the substructures, the information required can be obtained from considerably fewer samples.
Johns, P. B., Akhtarzad, K.
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Pulse and time-domain measurements

Proceedings of the IEEE, 1986
A review of the state of the art and science of pulse parameter measurements is given including recent advances in the use of real-time oscilloscopes, waveform recorders, equivalent time sampling oscilloscopes, and counter timers in the measurement of repetitive and single transient signals. Recent advances in the use of artifact waveform standards and
Robert A. Lawton, Sedki M. Riad, James R. Andrews   +2 more
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Subpicosecond-time-domain reflectometry

Optics Letters, 1981
We demonstrate a new method of optical time-domain reflectometry using subpicosecond pulses and nonlinear detection. The high-spatial-resolution ( approximately 15-microm) temporal resolution and sensitivity put new limits on the size and nature of defects that can be detected, localized, and analyzed in optical fibers.
J J, Fontaine, J C, Diels, C Y, Wang, H, Sallaba   +3 more
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