Sevastopol State University

Sevastopol, Russia

Sevastopol State University

Sevastopol, Russia
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The paper considers the task of making schedules for processing data of various types in the conveyor system in the presence of time restrictions on its operation and under condition of forming sets from the processing results. The paper is dedicated to the first stage of solving the above problem. This stage is associated with the rationale of a multilevel model of making decisions on the composition of data batches; composition of groups of batches being processed within the specified time intervals of the system; scheduling of processing of data batches in groups taking into account the conditions of forming sets of various types from the processing results.

Gembaty Y.V.,Sevastopol State University | Nikitin Y.V.,Sevastopol State University
WMU Journal of Maritime Affairs | Year: 2017

When a ship gets an original list, and a weight is to be vertically shifted (or is to be suspended by a ship’s gear), two approaches for calculating the change in list of the ship have been developed as follows: the first one—for the case when the biggest list of a ship is not more than 5–6°, and the second one—when the biggest list of a ship is not more than 10–12°. These equations have been represented in dimensionless form and reviewed for different specific shapes of a ship’s sides: circle, tumblehome, and wall-sided ones. For wall-sided ships, in order to simplify the procedure of calculating the change in list, a graphical approach and corresponding nomogram has been proposed and designed. The developed method and equations can be also used for calculating the change in list of a ship when heavy-lift cargo is just suspended by the ship’s own gear during heavy-lift operations. © 2016, World Maritime University.

Varminska N.,Sevastopol State University | Chablat D.,French National Center for Scientific Research
Mechanisms and Machine Science | Year: 2017

In this article, a theoretical justification of one type of skew-symmetric optimal translational motion (moving in the minimal acceptable time) of a flexible object carried by a robot from its initial to its final position of absolute quiescence with the exception of the oscillations at the end of the motion is presented. The Hamilton-Ostrogradsky principle is used as a criterion for searching an optimal control. The data of experimental verification of the control are presented using the Orthoglide robot for translational motions and several masses were attached to a flexible beam. © Springer International Publishing Switzerland 2017.

Evstigneev M.P.,Belgorod State University | Lantushenko A.O.,Sevastopol State University | Golovchenko I.V.,Sevastopol State University
Physical Chemistry Chemical Physics | Year: 2016

It has become an axiom that the thermodynamic analysis of non-covalent molecular complexation is intrinsically model-dependent, i.e. the set of implicitly or explicitly introduced assumptions may strongly affect the thermodynamic parameters. This review deals with the entropy change accompanying molecular complexation, which results in the formation of ordered structures. In simple terms the key question may be formulated as follows: 'If the molecular complexation leads to the formation of supramolecular structures, then, the system entropy changes due to ordering. So, how is this factor accounted for in standard models of molecular complexation and does it have any effect on the magnitude of measured thermodynamic parameters of complexation?' The structure of the review is made as a collection of cases in which the hidden entropy change has been recognized among the most influential factors. © the Owner Societies 2016.

Bondarev V.,Sevastopol State University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

The models of multi-input pulse neuron in generalized vector-matrix form are proposed in order to solve digital signal processing problems. Nonrecursive and recursive digital models are considered. Nonrecursive models use the description of linear systems in a convolution form and the input signal is presented as a sequential or a parallel binary vector. Recursive models are based on the description of linear systems in the time domain and use an impulse response and a state space approaches. A learning rule for the mentioned models of a pulse neuron is derived to solve a problem of signal reconstruction and adaptive noise suppression. Results of a computer simulation are presented. © Springer International Publishing Switzerland 2016.

Vadim K.,Sevastopol State University
Annals of DAAAM and Proceedings of the International DAAAM Symposium | Year: 2015

The article discusses the technique of construction of the generalized mathematical model of spatial movement of the drilling vessel, taking into account the mutual influence of different types of movement. Ships of various design and deadweight are used in today's worldwide practice for marine drilling aimed at probing or extracting minerals. There are automatic keeping systems over the drilling site in some of them. However, the information contained in express materials and advertisement messages disables from figuring out on what principles these systems are built, and, moreover, what the applied technical facilities comprise and what features it has. These concerns require consideration in respect of theory as well as applying to technical implementation. We have an aggregated representation of drilling vessel spacial movement, figuring on mutual influence of various types of motion (rolling, pitching, heaving motions, vessel yaw and horizontal plane transfers), as well as dimensional changes of the vessel depending on the kind of performed activity.

Bezhin N.A.,Sevastopol State University | Dovhyi I.I.,Sevastopol State University
Russian Chemical Reviews | Year: 2015

The key approaches to the synthesis of crown ether-based sorbents, including immobilization both with and without covalent bonding, are reviewed. Examples of sorbent preparation using anodic oxidation, chemical modification of polymers, polycondensation reactions, chemical modification of inorganic supports and radiochemical synthesis for covalent bonding of crown ether moieties are considered. Immobilization methods without covalent bonding including support synthesis in the presence of crown ethers, impregnation of supports with a crown ether solution and the use of powdered crown ether as a sorbent are presented. The applications of sorbents for selective removal of strontium from solutions of radioactive waste and spent nuclear fuel, for radiochemical analysis (determination of strontium in water, soil and biological materials) and for separation of strontium and yttrium isotopes are discussed. The bibliography includes 114 references. © 2015 Russian Academy of Sciences and Turpion Ltd.

In this paper, a new method for in-plane free vibration analysis of rectangular orthotropic plate is presented. The cases for completely clamped and completely free plates are considered in detail. The boundary value problem is essentially reduced to infinite systems of linear algebraic equations. New mathematical theory and associated results are presented for investigating the asymptotic behavior of non-trivial solution of quasi-regular infinite system. By enhancing the theory, an effective and accurate algorithm for determining the natural frequencies and modes shapes vibrations is developed. The accuracy and computational efficiency of the method are demonstrated by examples. © 2016 Elsevier Ltd.

Kabanov A.A.,Sevastopol State University
2016 International Siberian Conference on Control and Communications, SIBCON 2016 - Proceedings | Year: 2016

The problem of feedback linearizing control design based on canonical similarity transformation is considered. The idea of proposed method consists in representing the original nonlinear system into a state-dependent coefficient form and applying the canonical similarity transformation to this system. The application of the proposed approach is illustrated through examples. © 2016 IEEE.

Shirokov I.B.,Sevastopol State University | Gimpilevich Y.B.,Sevastopol State University
Asia-Pacific Microwave Conference Proceedings, APMC | Year: 2016

The problems of operation of homodyne radio frequency identification system are discussed. The presence of microwave reflectivity of the body the tag is placed onto, disturbs the operation of homodyne system. In presented paper the way of abatement of this negative influence is discussed. The problem is solved by using of rotary-polarized waves. © 2015 IEEE.

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