Results 211 to 220 of about 72,920 (259)
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Journal of the Optical Society of America, 1957
A photoelectric scanning instrument is described which gives granularity values in terms that can be converted into the graininess values that would be obtained by an observer viewing a magnified image of the sample under standard conditions. The procedure is to determine the critical scanning aperture that results in a signal corresponding to the ...
L. A. Jones +3 more
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A photoelectric scanning instrument is described which gives granularity values in terms that can be converted into the graininess values that would be obtained by an observer viewing a magnified image of the sample under standard conditions. The procedure is to determine the critical scanning aperture that results in a signal corresponding to the ...
L. A. Jones +3 more
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Radiation standards and measurement techniques for personal-portable communications equipment
IEEE Transactions on Vehicular Communications, 1966Radiation characteristics of personal-portable communications devices tend to vary more widely than perhaps any other operating parameter, and yet in many cases, this characteristic is the determining factor in the range and effectiveness of these devices.
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A measurement technique for the analysis of magnetic field emissions by power electronic equipment
Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on, 2002The paper deals with measurement procedures to be adopted in the analysis of electromagnetic emissions by power electronic apparatus. Attention is focused on the characterization of the nonstationary magnetic induction field that can be revealed in the neighboring of adjustable speed motor drives.
ANGRISANI, LEOPOLDO +2 more
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Research on technique of measuring space position change of equipment action part
SPIE Proceedings, 2008At present, a large number of electronic machinery and equipment was launched into military or civilian field. Such kind of equipments can rotates and moves precisely under control of micro-electronics device. It is an important task how to measure space position change of the mechanical parts.
Wei Wang, Shijie Deng, Ping Wang
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Ultrasonic Measurement Techniques and Equipment Output Levels
1982The accurate measurement of the output levels of medical diagnostic and therapeutic ultrasound equipment have become important to manufacturers and users as a result of the increasing use of these devices. Such measurements are important for several reasons.
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A Technique for Measuring Effective RFI Radiated from Electrical and Electronic Equipment
1967 IEEE Electromagnetic Compatibility Symposium Record, 1967A method of measuring the "effective" radio frequency interference radiated from electrical and electronic equipment is under investigation. The method* employs measurement of current in the power supply or ground leads of the interference source. It has been highly developed in France, but is little known in the United States.
K. A. Peebles, R. M. Showers
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Measurement technique for EMC evaluation of military communications-electronics equipment
IEEE 1988 International Symposium on Electromagnetic Compatibility, 2003An integrated test methodology to evaluate command, control, communications, and intelligence (C/sup 3/I) systems in a combat electromagnetic environment is presented. The methodology allows the US Army to test and field major C/sup 3/I systems in less time, and with greater confidence in successful operation, than was previously possible. Modeling and
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Equipment and techniques for the measurement of radar reflections from model targets
WESCON/57 Conference Record, 2005One of the most important factors in radar system design is the radar cross section, or echo-area, of the target. To eliminate some of the difficulties of measuring this quantity with actual aircraft and radars, scale model techniques have been developed which permit a high degree of flexibility and accuracy in the determination of radar reflection ...
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Improvement of measurement techniques in PD pulse detection in large HV equipment
Seventh International Conference on Dielectric Materials, Measurements and Applications, 1996Partial discharge (PD) measurement has been used as a tool to assess insulation integrity for many years. In terms of detection of PD pulses, a proper assessment of insulation integrity relies on accurate acquisition of the PD pulse signal. However, measurement errors may arise due to the measurement facilities involved. This paper discusses one aspect
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2016 AEIT International Annual Conference (AEIT), 2016
The discharge and pre-discharge modelling plays an important role in the electric industry: important fields like partial discharges, radio frequency interference, live-line maintenance and HVDC can receive significant improvements thanks to a better understanding of these phenomena.
A. Villa +4 more
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The discharge and pre-discharge modelling plays an important role in the electric industry: important fields like partial discharges, radio frequency interference, live-line maintenance and HVDC can receive significant improvements thanks to a better understanding of these phenomena.
A. Villa +4 more
openaire +1 more source