The algorithm of calculation of autocorrelated function of Markov sequence with a limited range of possible increments for creation of an optimum linear filter in the conditions of normal white noise is offered. Results of experimental check of the received expressions by methods of program modeling are presented.

The importance of the agricultural machinery testing in solving problems of modernization in agricultural production is shown. There have been noted shortcomings of the existing methodology for field trials of machines which are largely caused by the lack of tried-and-true methodology of metrological support for tests based on the latest achievements of the measurement technique. Based on the analysis the task has been set to develop methods of metrological assurance of agricultural machinery comparative tests that allow to rise reliability of test results under conditions of real operation.

The experimental study is made and the results presented of thermal conductivity of the system of diethyl ether+CNTs within the temperature range of 293-670 and pressure of 0,101-49,1 MPa, including for the critical region (3,6 MPa) and with concentration of CNTs from 0,1 to 0,5 %. The method of regular heating regime of the first kind is used to measure thermal conductivity of rhenium samples. The empirical equations are obtained, using the law of thermodynamical similarity, when processing the experimental data.

The purpose of the work was to study the possibility of using gas chromatography-desorption systems (CDS) for the preparation of volatile organic compounds calibration. Various methods for preparation are considered: according to standardized methods and with the use of calibration gas mixtures obtained CDS method. Comparative evaluation of the viewed and standardized methods has shown that the use of CDS leads to improve the accuracy as the calibration mixture, so analyzing samples of air, when uses such a mixture.

The article discusses the non-destructive, namely, a microwave method and apparatus for controlling the humidity of solid, granular and fibrous materials. A verification schedule for microwave moisture meters of raw cotton and cotton materials.

Quantitative determination of micro-components is complicated by large systematic errors. The proposed methods ensure an acceptable trueness (complete exclusion of systematic error) of the measurement results of small and ultra -small contents of components in samples of substances, materials and environments, including contents close to the detection limit.