Results 271 to 280 of about 1,871,500 (313)

HIGH-RESOLUTION TIME DOMAIN REFLECTOMETRY

Soil Science, 1995
When using the time domain reflectometry (TDR) technique in laboratory experiments, e.g., with packed soils columns, it is often of great importance to obtain high depth resolution with minimal disturbance of the soil and to be able to,measure close to the soil surface. This requires the use of fairly small TDR probes that can be placed near each other.
Petersen, Lis Wollesen, Thomsen, Anton, Moldrup, P., Jacobsen, Ole Hørbye, Rolston, D.E.   +4 more
openaire   +3 more sources

High-spectral-resolution time-frequency distribution kernels

SPIE Proceedings, 1992
A new class of time-frequency distribution (TFD) kernels is introduced. Members in this class satisfy the desirable TFD properties and simultaneously provide local autocorrelation functions (LAF) that are amenable to high-frequency resolution modeling techniques.
Moeness G. Amin, William J. Williams
openaire   +1 more source

A high resolution time measurement system

[1991] Conference Record. IEEE Instrumentation and Measurement Technology Conference, 2002
A high-resolution, less than 1-ps, time measurement system (TMS) has been developed using a time-to-voltage (T/V) conversion interpolation technique. In order to accomplish the high-resolution measurement, the authors developed two specific techniques. One is the generation of an accurate interpolation pulse from the measured signal that is realized by
Y. Yamaguchi, N. Koyanagi, K. Katano
openaire   +1 more source

High-Resolution PPM for Time-Based Architectures

2018 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), 2018
This paper presents a new high-resolution pulse-position modulator (HR-PPM) circuit based on two different designs. The proposed high-resolution PPM is presented for time-based serial communication links. The proposed HR-PPM has been combined with a lower-resolution PPM to achieve a dual-resolution PPM (DRPPM) circuit for time-based serial link ...
openaire   +1 more source

High resolution travel time tomography

SEG Technical Program Expanded Abstracts 2002, 2002
The velocity and interface depth determination is one of the most important tasks of exploration seismology. However the process of velocity-depth determination suffers from non-uniqueness of the solution. Traditional methods for imposing uniqueness suffer from loss of resolution and damping of the solution.
Yonadav Sudman, Dan Kosloff
openaire   +1 more source

A linear resistance-to-time converter with high resolution

IEEE Transactions on Instrumentation and Measurement, 2000
A resistance-to-time converter employing a bridge amplifier, an integrator and a comparator is described. While possessing a resolution and linearity of the same order as that of a recently reported resistance-to-frequency converter, the present circuit has the advantage of grounded detecting resistance.
openaire   +1 more source

AμSR apparatus with high time resolution

Hyperfine Interactions, 1984
A high time resolutionμSR apparatus is described. The set up is mainly used for precision measurements of the muonium hyperfine interaction.
E. Holzschuh, W. Kündig
openaire   +1 more source

High time resolution measurements in the magnetosphere

1990 Plasma Science IEEE Conference Record - Abstracts, 1990
Summary form only given. The physics of the magnetosphere are characterized by the formation of thin boundaries. It is within these narrow regions that energy conversion and particle acceleration processes occur. These processes are often controlled by nonlinear microphysics occurring on time scales as fast as a few microseconds.
C.A. Cattell, C.W. Carlson, F.S. Mozer, M.A. Temerin, J.R. Wygant   +4 more
openaire   +1 more source

A simple time stretcher with high resolution

Nuclear Instruments and Methods, 1976
Abstract A simple time stretcher has been built having a linearity over the range 500 ns to 10 μ s of ±0.6%, a resolution of ≲ 2 ns and a temperature coefficient of ⩽ 0.05%/°C. Time magnifications ≲ 10 were used.
W.D. Waddoup, R.J. Stubbs
openaire   +1 more source

High-time-resolution laser spectrometer

Soviet Journal of Quantum Electronics, 1980
A pulsed laser spectrometer was developed on the basis of a tunable He–Ar high-pressure laser. The accuracy of synchronizing the laser with an object being investigated was ~ 1 nsec. In order to automate the measurements, pulse voltmeters having a wide dynamic range and devices for analog processing of the signals were developed.
K V Kiryunikov, S A Kochubeĭ, V N Lisitsyn, P L Chapovskiĭ   +3 more
openaire   +1 more source