Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan

About: Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan is a education organization based out in Dnipro, Ukraine. It is known for research contribution in the topics: Track (rail transport) & Bogie. The organization has 736 authors who have published 655 publications receiving 1468 citations. The organization is also known as: Institute of Railway Transport Engineers.

Free-piston engine-and-hydraulic pump for railway vehicles

Abstract: Purpose. The development of the free-piston diesel engine-and-hydraulic pump for the continuously variable hydrostatical transmission of mobile power vehicles. Methodology. For a long time engine builders have been interesting in the problem of developing free piston engines, which have much bigger coefficient of efficiency (40…80%). Such engines don’t have the conversion of reciprocating motion for inner combustion engine piston into rotating motion of crankshaft, from which the engine torque is transferred to the power machine transmission. Free-piston engines of inner combustion don’t have the crank mechanism (CM) that significantly reduces mechanical losses for friction. Such engines can be used as compressors. Free-piston engine compressor (FPEC) – is a free-piston machine in which energy received from engine’s cylinder is being transferred direct to compressor’s pistons connected with operational pistons of engine without crank mechanism. Part of the pressed air is being consumed for engine cylinder drain and the other part is going to the consumer. Findings. The use of free-piston engines-and-hydraulic pumps as power-transmission plants of power vehicles (diesel locomotives, combine harvester, tractors, cars and other mobile and stationary power installations) with the continuously variable transmissions allows cost effectiveness improvement and metal consumption reduction of these vehicles, since the cost effectiveness of FPE is higher by 25-30%, and the metal consumption is lower by 40-50%. Originality. One of the important advantages of the free-piston engines is their simplicity and engine balance. As a result of the crank mechanism absence their construction is much simplified and the vibrations, peculiar to the ordinary engines are eliminated. In such installation the engine pistons are directly connected through the rod to compressor pistons and therefore there are no losses in the bearing bushes. Practical value. The free-piston engines are now used only as gas generators and diesel compressors, and the hydraulic transmission is arranged with the ordinary heat-engine, which operates the hydraulic pumps.

Representation of nature and man in practical philosophy of descartes

Abstract: Purpose. Modern philosophy is presented as practical and is based on the necessity to give a new meaning and interpretation to moral and ethical problems. Purpose of the paper is to comprehend specifics of modern perception of Cartesian interpretation of nature and man that implies consistent stages of technomorphic perception, critical analysis of its authenticity in research literature and understanding of rehabilitation tendency of Descartes' ethics as practical philosophy. Originality. The research is focused on the problem of technomorphism authenticity in the process of understanding and interpreting Descartes' practical philosophy. The authors are trying to defend rationale for phenomena interpretation concerning Descartes' technocratic orientation in terms of his ethical search. Critical interpretations of limited technomorphic perception of nature and man should be understood as some transition period towards ethics rehabilitation as practical philosophy. The study of Descartes on nature in its broad sense as metaphysical basis of his ethics has been revealed and analyzed. Conclusions. Technocratic interpretation of Descartes study is a superficial and distorted form of his practical philosophy interpretation. Until recently technomorphic perception of Descartes' study dominated in scientific literature, which has significantly determined limited perception of nature and man combined with superficial ethics perception. Critical rethinking of the developed Descartes' interpretations in recent scientific papers solves at the same time the tasks of theoretical denial of simplistic world perception and gives grounds for ethics rehabilitation as authentic form of its practical philosophy expression. One form of rehabilitation expression is increased attention to the concept of nature in its broad sense, which is a basis for its humanistic and ethical vision of philosophical tasks.

Building models of freight cars refusals involving bayesian approach

Abstract: Based on the theoretical analysis and Bayesian statistics ordinary shown that Bayesian analysis begins with the known data from the following consideration changes in knowledge process of obtaining new information and mathematical statistics methods of sample observation comes only with the knowledge of some group of objects. Using Bayesian formula, we can determine the probability of any event, provided that there was another statistically correlated with it an event that counted with greater accuracy the likelihood. This used previously known information and data obtained as a result of new observations. The study of failures of freight cars, the Bayesian approach allows you to evaluate the occurrence of each failure of parts or assemblies separately, as well as through changes in the formula for the total probability. The paper, based on Bayesian method was done combining two models: the failures of freight cars and the changing physical and mechanical properties of composite materials. This posterior probability determined a priori probability of failures given using the model change of physical and mechanical properties and the likelihood function that takes into account the additional value failures. Using the expression for the posterior probability held specification mentioned developments (run) freight wagon to failure.

Big Data, Analyzing and Modelling: New Ways of Health Improvement and Regional Aspects

Abstract: The field of health improvement and life prolonging develops poorly, despite all the advances in medicine, chemistry and genetic engineering Among the main problems is the difficulty of using new scientific achievements in other industries due to the rapid development of specialized knowledge, the problem of returning costs for the creation of really effective and the problem of aging population in developed countries There are problems with data for this methods usage with privacy and security on different levels with regional peculiarities Effective timing of work on health at the personal level can result as a result of increased time and productivity But it's difficult for people to allocate their intellectual resources for that, so you have to connect artificial intelligence and machine learning Big Data model with methods and analysis techniques on different levels for health improvement was suggested The importance of the level of social networks and its regional aspects for the analysis of health improvement data was identified Big data processing results implementation and levels of interaction with human with request for changes model was proposed It consists from two levels of interaction with humans by level of quick reaction and discussion with smart personal assistance Regional aspects from possible AI implementation in undeveloped countries were analyzed on example of personal level big data for health usage