The analysis of asymptotic distributions of various tests for trend detection in expectations and variances of the values under observation is conducted. The disadvantages of some tests are shown and the results of a comparative test power analysis are presented.

The rapid method of separate measurements of jointly acting harmonic signals vectors their special frequency-dependent discretization and using discretes summation is considered. The theoretical justification of the method is carried out, the measurement errors and the possibilities of its technical realization are discussed.

Questions of the even temperature distribution creation in the volumetric materials with different dielectric losses placed in the beam-type microwave device are examined. The volumetric material was irradiated by two types of antennas which provided perpendicular and parallel flux direction of the electric-field vector relatively to the material's surface. Experimental data on the temperature field distribution in the volume of material is presented. It is shown that the total temperature dispersion is less than 5ºC inside the material heated up to 80ºC.