Technical News

13-14

Authors: Харченко Є., Палюх В.

We conducted studies of dynamic loads of suspension unit supports that are based on the specified mathematical model of spatial fluctuations of vehicle power-train. There were found the influence of the number of supports, their stiffness and dissipation characteristics of the efforts in the bearings. During the study was set the possibility of applying for engineering practice the linearized mathematical model of spatial fluctuations of the power unit.

20-22

Authors: Крайник Т., Луцик Я., Яцишин С., Семенистий А.

There are considered the acoustic thermometers with the sensitive elements made from Ni-based alloys. The last one sare characterized by the high reproducibility of propagation velocity of the acoustic pulses on temperature dependences and therefore may be recommended for high temperature applications in acoustic thermometers design. The attenuation of the measured signals has to be compensated by the corresponding raise of signal amplification coefficient in a controlled temperature range at 700 ΕС and higher for alumel and khromel.

26-29

Authors: Tchaban V., Kostiuchko S.

We proposed a joint algorithm of calculating of transient and steady-state parametric sensitivity of the three-phase induction motor. Differential equations of device are presented in normal Cauchy’s form. Transient process is obtained for given initial conditions, steady-state - for those that exclude the transient reaction. The results of simulations are given.

34-36

Authors: Bilyakovskyy I., Кasha L., Кrohmalnyy B., Guk V.

The electric drive on basis of the Switched Reluctance Motor with the parallel accumulator of energy is offered for the wheels drive to the trolleybus. Main characteristic allow an engine successfully to complete with traction collector engines. They have higher reliability and less volume of active part. Recommendations are grounded in relation to designing taking into account the features of construction and on the basis of theory of electromagnetic transformation of energy. These recommendations are taken as a basis of project calculation.

42-44

Authors: Цимбал Ю., Асіїв А., Грицько Т.

The problem of the search for optimal combinatorial designs on the example of Leech and Golomb trees has been considered. Criteria of optimality for these trees have been generalized. The application of a simulated annealing to the finding near-optimal trees has been suggested. Outcomes of the application of the algorithm to the finding some optimal trees with 10-12 edges have been presented.

49-50

Authors: Готра З., Яцишин Б., Вісьтак М.

Electronic states in W-like potential are investigated. Correlation of obtained results with current in the phenomenon of current generation in nanostructured objects is considered.

52

Authors: Різник В.

Mathematical models of optimum vector coding systems based on two - and multidimensional combinatorial configurations, which created from cyclic sequences of integer-value sub-sequences with ring topology structure, are regarded. Such models make it possible to vector date code using binary position codes with possibility on high speed detecting and correcting of errors due to arranging the same symbols to gether in all code combinations with optimum distributed of vector data binary bits in cyclic structure of the code combinations.

55-56

Authors: Білий Л.

The possibility of analysis of autonomous systems in which time isn't in the right part of the equation, based on the sensitivity model to initial conditions. To determine the stationary solutions of nonlinear systems using an iterative Newton method.

59-60

Authors: Дубук В.

The analysis for problem of monitoring values of electric voltage by means of intelligent in formation system is carried out. The features of modelling for intelligent in formation system for electric voltage monitoring are defined. The investigations of intelligent in formation system for electric voltage monitoring are elaborated on the base of model, which is built. The results of investigations and conclusions are given.

63-65

Authors: Боярський В.

Social network analysis is widely used in a wide range of applications and disciplines. Large amounts of data leads to the use of large-scale data processing. Apache Hadoop, which works on the programming model Map Reduce, is one of such systems. A modified Dijkstra algorithm has been applied to investigate the theory of six degrees of separation. The results of the studies revealed an average length between any users of social networks, and confirmed the theory.

68-70

Authors: Лиса Я., Беспалова О., Тиндик В.

The article is focused on the problem of monitoring the primary drying phase of freeze-drying of biological material in vials. It is necessary to control product temperature does not exceed the maximum to prevent destruction, as well as determination the position of a sublimation moving front, which gives information about the end of the primary drying stage. There are a lot of ideas for the development of temperature sensors, but none fully meets the needs of the freeze-drying. So research is concentrated on development of thermal sensor, which will give information about the two most important parameters of the primary drying stage. Experimental research will be conducted in Comsol, and then tested at the State Scientific Control Institute of Biotechnology and Strains.

72-73

Authors: Прийма А., Прийма Т.

The purpose of this article is the regulation of the risk management process for product quality, aimed at analyzing the production of chemical products.

76-77

Authors: Пукач П.

A general methodology to study some classes of nonlinear nonautonomous systems with strong nonlinearity is described. The methods of studying of resonance phenomena is designed. Research methods are based on the idea of using special Ateb-periodic functions.

79-81

Authors: Яцишин М.

A large number of public sector and residential sector buildings are reconstructed, resulting in reduced energy consumption. The technique, which facilitates the selection of energy saving methods and, consequently, in creases the energy efficiency of buildings in their capital repairs is considered.

85-86

Authors: Пристай Т., Петришак В.

The effect of nematic liquid crystal on the dielectric in sight multystinkovyh carbon nanotubes under the influence of a magnetic field.

89-90

Authors: Іванюк Х.

Аnalysis of the current state of OLEDs. A new approach exciton and eksypleksnoho radiation mechanism TADF, based on intramolecular spin conversion nevyprominyuvalnyh triplet states in the radiative singlet state.

95-98

Authors: Turek J., Bril J.

The article represents research conclusions of impact resistance of chosen hot-work tool steels. The research of impact resistance was conducted for tool steel in the temperature.