The article proposes a method for converting object geometry files from the SketchUP system into the Catt-Acoustic system. The proposed method has made it possible to accelerate the development of the premises models for their further acoustic analysis in the Catt-Acoustic system and to automate the process of determining the acoustic properties of the materials used in these premises.
The work is devoted to the problem of signal transducers of high-sensitivity differential temperature sensors. The conducted studies have shown that the scheme of the signal converter with the stabilization of the total emitter currents of a transistors pair is characterized by a combination of high sensitivity and stability of the steepness of a transformation function. In particular, as compared to the circuit with the stabilization of the collector current of a reference transistor, the instability of steepness is reduced 20-fold.
The aim of the research was to reduce ecological danger caused by vehicles through the use of combined fuel and improved designs converters of exhaust gases. The use of obsolete structures of a catalytic analyzer on cars and the provision of periodic purging of catalytic units can significantly reduce soot emissions without making changes to the design of the engine. It was established that the use of a mixture of diesel fuel with biofuels (made involving waste) reduces the toxicity of exhaust gases by 30–35 % and saves hydrocarbons.