643. Vacuum electrodynamic current measuring instrument for high frequencies

Vacuum ◽  
1971 ◽  
Vol 21 (7) ◽  
pp. 296
Keyword(s):  
Measuring Instrument ◽  
High Frequencies ◽  
Current Measuring

FEATURES OF MEASUREMENT OF REFLECTIVE FACTOR IN SUPERHIGH FREQUENCIES BY MEANS OF ANALYZERS OF CHAINS

2020 ◽  
pp. 116-124
Author(s):  
A.A. Belyaev ◽  
◽  
E.E. Bespalova ◽  
Keyword(s):  
Measuring Instrument ◽  
High Frequencies ◽  
Absorbing Materials

Features of measurement of factors of reflection of radio absorbing materials by means of analyzers of chains at super-high frequencies are described. Results of measurements of one of standard radio absorbing materials with use of the analyzer of chains are given and comparison with results of measurements by means of a measuring instrument of KSVN panoramic is carried out them. By results of the carried-out measurements conclusions are drawn on possibility of use of the described methods of measurements of factors of reflection of radio absorbing materials

Quasi-Periodic Oscillations in Dwarf Novae

1979 ◽  
Vol 46 ◽  
pp. 77-88
Author(s):  
Edward L. Robinson
Keyword(s):  
Binary Systems ◽  
Outer Edge ◽  
Light Curves ◽  
Close Binary ◽  
Bright Spot ◽  
Dwarf Novae ◽  
Periodic Oscillations ◽  
High Frequencies ◽  
Short Period ◽  
Typical Time

Three distinct kinds of rapid variations have been detected in the light curves of dwarf novae: rapid flickering, short period coherent oscillations, and quasi-periodic oscillations. The rapid flickering is seen in the light curves of most, if not all, dwarf novae, and is especially apparent during minimum light between eruptions. The flickering has a typical time scale of a few minutes or less and a typical amplitude of about .1 mag. The flickering is completely random and unpredictable; the power spectrum of flickering shows only a slow decrease from low to high frequencies. The observations of U Gem by Warner and Nather (1971) showed conclusively that most of the flickering is produced by variations in the luminosity of the bright spot near the outer edge of the accretion disk around the white dwarf in these close binary systems.

The Software «MMI–calibration 3.0»

Metrologiya ◽  
2020 ◽  
pp. 16-24
Author(s):  
Alexandr D. Chikmarev
Keyword(s):  
Power Series ◽  
Data Processing ◽  
Statistical Treatment ◽  
Correction Function ◽  
Calibration Function ◽  
Measuring Instrument ◽  
Working Standard ◽  
Calibration Protocol ◽  
Error Probabilities ◽  
Continuous Power

A single program has been developed to ensure that the final result of the data processing of the measurement calibration protocol is obtained under normal conditions. The calibration result contains a calibration function or a correction function in the form of a continuous sedate series and a calibration chart based on typical additive error probabilities. Solved the problem of the statistical treatment of the calibration protocol measuring in normal conditions within a single program “MMI–calibration 3.0” that includes identification of the calibration function in a continuous power series of indications of a measuring instrument and chart calibration. An example of solving the problem of calibration of the thermometer by the working standard of the 3rd grade with the help of the “MMI-calibration 3.0” program.

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