Results 161 to 170 of about 8,183 (207)

Time Domain Reflectometry: A new measuring technique for research on superionic conductors

Radiation Effects and Defects in Solids, 1991
We have used Time Domain Reflectometry, which appears to be a powerful and efficient technique, to study the ionic conductivity and permittivity of superionic conductors. The differences in the defect structure occurring for doping of SrF2 with different rare earth ions play an important role in the dielectric properties of these materials.
Ebens, W.O., den Hartog, H.W.
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THE SPATIAL SENSITIVITY OF TIME-DOMAIN REFLECTOMETRY

Soil Science, 1989
With any method for measuring soil water content it is useful to know the spatial sensitivity of the measurement, i.e., what volume of soil is measured and what the distribution of sensitivity is within that volume.
J. M. BAKER, R. J. LASCANO
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Optoelectronic time domain reflectometry

IEE Colloquium Microwave Measurements: Current Techniques and Trends, 1999
Demonstrates optoelectronic time domain reflectometry using two optoelectronic pulse generator systems. The use of LT-GaAs and electro-optical sampling (EOS) provides significantly better time resolution than conventional techniques. Direct comparison of results using pulses with conventional techniques using steps is discussed.
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Time-domain slicing optical frequency domain reflectometry

Optics Letters
A time-domain slicing (TDS) optical frequency domain reflectometry is proposed for large strain sensing with better spatial resolution. Compared with the conventional frequency domain slicing (FDS) method, the TDS with a Burg spectrum estimation is capable of enhancing the similarity of a local spectrum under large strain and mostly suppressing the ...
Qing, Bai, Zhen, Shen, Luxuan, Wu, Changshuo, Liang, Yu, Wang, Xin, Liu, Baoquan, Jin   +6 more
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On the Feasibility of Pressure Profile Measurements With Time-Domain Reflectometry

IEEE Transactions on Instrumentation and Measurement, 2009
Many applications in geotechnical engineering require knowledge of total pressure distributions. So far, only measurements at single points at individual locations of interest can be carried out with conventional geotechnical measurement devices. Time-domain reflectometry (TDR) has already been used to assess the amount of shearing at multiple distinct
Alexander Scheuermann, Christof Huebner
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Time domain reflectometry

1988
The abbreviation TDR stands for the instrument (Time Domain Reflecto-meter) and the technique (Time Domain Reflectometry). The context in which the letters are used generally make it obvious which is meant.
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Solitons for optical time-domain reflectometry

Journal of the Optical Society of America B, 1996
We describe the propagation of solitons in an optical time-domain reflectometry geometry. Intense nonsolitons usually broaden nonlinearly as they propagate out to a scatterer and broaden linearly as they return to their origin. In contrast, solitons propagate with a fixed pulse width or narrow on their way out to the scatterer.
Amikam Levanon, Stephen R. Friberg, Yoichi Fujii   +2 more
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Time Domain Reflectometry Uses In Geotechnical Engineering

18th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 2005
Time Domain Reflectometry (TDR) makes use of a device that propagates transverse electromagnetic waves through soils by means of special soil probes as shown in Figure 1 for field testing and in Figure 2 for testing a specimen. For field testing four spikes are driven into the soil while for testing a specimen in a mold, only a center rod is driven ...
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Energy Bounds for Time-Domain Reflectometry

IEEE Transactions on Instrumentation and Measurement, 1973
Bounds for the minimum energy reflected from certain reactive discontinuities, when excited by time-limited signals, are considered. The implications for the use of time domain reflectometers in detecting small discontinuities are considered.
Louis E. Roemer, Joseph T. Mayhan
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Practical aspects of time domain reflectometry

Chemical Physics Letters, 1975
Abstract Dielectric relaxation data for n-propanol are obtained in the time-domain and in the frequency-domain (via Fourier transformation) using the method of time-domain reflectometry. The frequency-dependent dielectric permittivity was deduced numerically using an exact solution and various approximate methods.
T.S. Clarkson, G. Williams
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