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Realization control volume method for calculation of non-stationary task of heat conductivity is presented in the article. This method can be applied for simulation of metal casting solidification in sand mold and other application. Distinctive feature of the developed method is possibility of application of the distributed computing which provides a good result on calculation speed, however demands the bigger volume of random access memory. In the calculation example, for a grid from 1 million elements the increase in calculation speed by 15÷20% was reached when using 2 cores of the Intel Core I-5 processor and by 30% when using 3 cores. Also there is a possibility of increase of calculations accuracy for the account of increase in quantity of calculated elements at identical calculation time.

Abstract. The paper presents a methodology for optimal construction of telecommunication system for corrective information distribution based on the criterion of minimizing of expendable resources. A calculation method of range of control and correction stations (CCS) action transmitting the corrective information to mobile consumers under various conditions (sea, land areas with various electrical properties) is developed. A construction algorithm of the optimal telecommunication system has been created. The software in the software shell MATHLAB was developed for implementation of the obtained algorithm. The obtained algorithm and the developed program were tested. The results of comparison of calculations with the analytical solution and experimental data for the specific example are given. These results gave a good matching between the computations obtained by the algorithm and the analytical calculations. The developed algorithm and program were applied to optimize the composition of CCS of the local differential subsystem in the rivers basins of Siberia and the Far East. An example of the formation of action zones of CCS in the basin of the Ob River on inland waterways of Russian Federation is given. In conclusion, the inference is made about the effective optimization of the local differential subsystem, as a result of which it became possible to provide all inner waterways in the Ob basin by a continuous field of the differential correction.

The results of investigations on the use of additive technologies for manufacturing geometrically complex patterns in foundry technology are presented. The purpose of this work is the investigation of possibility to use as pattern materials – PLA and ABS plastic according to the technology of the layer-by-layer application of melted pattern material through an extruder. In the paper there is considered an alternative method which consists in printing basic units on a 3D printer with subsequent manufacturing patterns made of them for casts. For 3D pattern conversion into a set of instructions for the motion of a printing head there was used Replicator G (free software). The parameters of dimension accuracy and a rate of pattern material burning were investigated inasmuch as a slow gasification can result in unsatisfactory filling of a mold with melt and as a consequence in the defect formation in a subsequent cast because gas dissolution in metal.