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No 10 (2018)

STATE STANDARDS

3-8 137
Abstract
The composition and the metrological characteristics of the State primary measurement standard of units of radiometric and spectroradiometric quantities in the wavelength range from 0,2 to 14,0 μm are presented. The technical characteristics and principles of operation for the following new standard facilities, created as a result of improvement of the measurement standard, are described: a set of optical radiators in the form of high-temperature blackbody models based on phase transitions of metal-carbon compounds of cobalt, rhenium and tungsten, a facility based on goniometer and spectroradiometer for the total spectral radiant flux scale realization and dissemination, a diffuse monochromatic radiation source with a tunable wavelength based on «white laser», monochromator and integrating sphere for realization and dissemination of scales of irradiance and radiance

GENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUES

14-18 94
Abstract
This paper gives the construction ways of vectors close to the initial vector (neighbour vectors) based on the analyses of time series composed of the controlled parameter values. Using constructed neighbour vectors coordinates together with the initial vector ones allows to increase sample volume to calculate statistic characteristics applied for parameter drift forecast and thus to improve these characteristics estimates reliability.
19-23 139
Abstract
Proposed fast technique bandwidth selection for kernel function in multivariate nonparametric density estimation of the Rosenblatt-Parzen type. The method is based on the results of an analysis of the asymptotic properties of the multivariate density estimate. The properties of a fast algorithm bandwidth selection for multivariate kernel density estimation are investigated.

LINEAR AND ANGULAR MEASUREMENTS

24-27 90
Abstract
The article contains the description of sample displacement measurement peculiarities in the probe microscope positioning system. The necessity of coordination a positioning step value with a microscopes field of view is shown. The application of accelerometer and an images statistical differentiation tool for a samples movement size determination is described. It is shown, that complex processing of shift calculation results, received by means of accelerometer and images processing tools, allows to increase results reliability

OPTICOPHYSICAL MEASUREMENTS

28-30 198
Abstract
The method of attenuating the high power of laser radiation on a wavelength of 1,06 μm with use of a diffraction grating is considered. The thermal regimes of the attenuator operation and various cooling systems are considered. The uncertainities in the attenuation coefficient associated with the polarization and spectral composition of the radiation, the absorption of radiation, mechanical deformation, and the temperature regime of the diffraction grating are estimated. It is shown that the described attenuator can be used as a calibrated attenuator of powerful laser radiation with a wavelength of 1.06 μm with an uncertainity of 0,64 %.
31-34 73
Abstract
Dependences have been obtained that make it possible to estimate the error in measuring the beam diameter, the divergence angle, and the centroid coordinates determined in accordance with GOST R ISO 11146-2008, related to the sensitivity instability of the matrix receiver elements.
35-40 116
Abstract
Parametric information theory is applied for investigation of the minimum variance boundary of the Stokes parameter estimates of a partially polarized quasi-monochromatic radiation in a polarimetric scheme with the analyzer and phase compensator at the normal additive noise. Based on the analysis of the information density distributions in the factors of the rotation angle and the phase shift the optimal measurement plans and the associated dispersion matrixes are found. The formulas for obtaining effective estimates are derived. The error limits of the various polarization parameters and their distributions over the Poincare sphere are calculated.

TIME AND FREQUENCY MEASUREMENTS

41-46 129
Abstract
SATRE modems are usually used for time and frequency transfer via geostationary satellite (method TWSTFT). In this work, modems are applied for fiber-optical time and frequency transfer with distances up to 200 km. The experimental estimates of uncertainty of time scale comparison via Two Way Optical Time and Frequency Transfer (method TWOTFT) using SATRE modems are given.
47-49 88
Abstract
The research results of device for the transmission of highly stable time signal from hydrogen mazer over 150 km optical fiber communication line using the active electronic compensation of time delay are presented. The signal transmission error (standard deviation) is 80 ps on the daily averaging interval. The device allows you to synchronize the time scales of remote from each other oscillators included in the primary and secondary standards of units of time and frequency.

RADIO MEASUREMENTS

50-56 104
Abstract
The results of studies of the estimation of the average power of the signal with phase fluctuations of harmonic components with a view to the spectral composition of the signal, characteristics of the phase fluctuations, the aperture uncertainty, and the sampling frequency of the analog-to-digital converter are presented. Analytic expressions are obtained for the numerical characteristics of the distribution of the above estimate for the normal probability distribution of random variables for uncorrelated random processes.

PHYSICOCHEMICAL MEASUREMENTS

57-60 98
Abstract
A dielectric moisture meter is described in which a moisture content of a studied material is measured in the radio frequency range by the angle of a phase shift between changes of the total conductivity of an instrument capacitor of a sensor and its reactive component. These changes are caused as a result of placing a measured material sample inside the capacitor volume. It is shown that such moisture meter is not sensitive to a mass of the material sample, but is rather sensitive to its moisture content. It is simpler in a design than the known mass-insensitive moisture meters and can surpass them in accuracy of measurements because of reducing a number of measuring operations.
61-65 98
Abstract
The technique of design of electrical devices control of agricultural products on the example of dielcometric moisture measurement and the conductivity of the grain in a systemic way in the studied «system of OCTS», which includes a control Object, Controlling the electrical device, Technological process and Service management. The analysis of the structural scheme of the proposed system allowed us to identify three features: a description of the system, providing links to other elements; connection with the operation of the upper levels of the system and contribution to its effectiveness. Built a real model of the measuring cell according to its influencing factors and environmental factors

ECONOMIC PROBLEMS OF METROLOGY

66-72 106
Abstract
The mathematical model intended for long-term planning and target management of indicators of efficiency (modernity and serviceability) of Park of measuring equipment is presented. As control function there used procurements, repairs and write-offs. The model is based on a system of finite - difference equations describing The model is based on a system of finite - difference equations, describing the dynamics of changes of number of measuring equipment samples with different level of modernity and serviceability and algorithms based on the properties of stationary solutions of dynamic systems. A distinctive feature of the model is the visibility and ease of use. The results of calculations are presented


ISSN 0368-1025 (Print)
ISSN 2949-5237 (Online)