bluuebunny/crossref_metadata_2025_split huggingface dataset:
PARAMETRIC IDENTIFICATION OF STOCHASTIC SYSTEM BY NON-GRADIENT RANDOM SEARCHING
Authors: Lobaty A. A. , Stepanov V. Y. 
Published: July 2018

At this moment we know a great variety of identification objects, tasks and methods and its significance is constantly increasing in various fields of science and technology. The identification problem is dependent on a priori information about identification object, besides that the existing approaches and methods of identification are determined by the form of mathematical models (deterministic, stochastic, frequency, temporal, spectral etc.). The paper considers a problem for determination of system parameters (identification object) which is assigned by the stochastic mathematical model including random functions of time. It has been shown that while making optimization of the stochastic systems subject to random actions deterministic methods can be applied only for a limited approximate optimization of the system by taking into account average random effects and fixed structure of the system. The paper proposes an algorithm for identification of parameters in a mathematical model of the stochastic system by non-gradient random searching. A specific feature of the algorithm is its applicability practically to mathematic models of any type because the applied algorithm does not depend on linearization and differentiability of functions included in the mathematical model of the system. The proposed algorithm ensures searching of an extremum for the specified quality criteria in terms of external uncertainties and limitations while using random searching of parameters for a mathematical model of the system. The paper presents results of the investigations on operational capability of the considered identification method while using mathematical simulation of hypothetical control system with a priori unknown parameter values of the mathematical model. The presented results of the mathematical simulation obviously demonstrate the operational capability of the proposed identification method.
ELECTROLYTE-PLASMA TREATMENT UNDER NON-STATIONARY MODE IN A HIGH-GRADIENT ELECTRIC FIELD
Authors: Aliakseyeu Yu. G. , Korolyov A. Yu. , Parshuto A. E. , Niss V. S. 
Published: July 2018

Electrolyte-plasma treatment has become widespread in the industry as an alternative to traditional chemical, electrochemical and mechanical methods of improving the surface quality of products made of metallic materials. Advantages ofelectrolyte-plasma treatment are a high intensity of microroughness smoothing, the use of low concentration salts solutions as electrolytes, the possibility of processing products of complex shape. The main disadvantage of this method is high power consumption, so the method can be considered in its classical form to the power-consuming. A possible way of reducing power consumption is treatment in unsteady modes that arise in the transition zone between a switching and stable electrolyte-plasma treatment process and is characterized by the periodic formation of a stable vapor-gas shell and a transition to an electrochemical process. The paper presents the results of a study of the influence of a high-gradient electric field under unsteady electrolyte-plasma treatment modes on the energy parameters of the process and the characteristics of the surface being treated. It is established that a high-gradient electric field has a significant effect on the decrease in specific power consumption, which is explained by a decrease in losses in the electrolyte and the influence of the field on the formation and maintenance of the vapor-gas shell. As a result of the study of the effect of a high-gradient electric field in unsteady EPT modes on characteristics of the surface layer was established that a significant impulse current density in the zone of predominantly electrochemical treatment leads to a selective etching of the surface and the formation of a characteristic micro relief of the surface with a developed porous microstructure with pore sizes from 0.3 to 2.5 microns. The most pronounced porous microstructure is provided at a voltage of 270–300 V and an additional inductance of 3.2 mH.
COMPUTER MODELING AND ANALYSIS OF VIBRATIONS IN ANNULAR CONCENTRATOR OF ULTRASONIC SYSTEM
Authors: Lugovoi V. P. , Pronkevich S. A. , Lugovoi I. V. , Dovnar S. S. 
Published: July 2018

The paper provides substantiation on application of elastic annular concentrators of ultrasonic systems which allows to increase an intensity of tool vibrations. It has been shown that elastic elements are used as resonators and tools in a number of ultrasonic technological systems. However an application of the elastic elements as concentrators of ultrasonic vibrations has been insufficiently studied and requires research and development of recommendations for usage. For this purpose theoretical studies have been carried out and they have helped to perform modal and harmonic analysis of several variants for a computer model of a ring with outer diameter D = 50 mm. Models of rings with various hole sizes from 20 to 40 mm have been analyzed while changing hole axis position relative to ring axis. The paper shows modes of ring flexural vibrations which can be either flat or three-dimensional depending on frequency of forced oscillations. It has been pointed out that an increase in a ring internal diameter is accompanied by higher amplitude of bending oscillations in the thinnest ring section. The same effect is achieved by increasing eccentricity of a hole axis. The paper contains recommendations for determination of rational geometric parameters which allows to increase an oscillation amplitude gain ratio and it is determined as ratio of ring section thickness. It has been established that decrease in section thickness is accompanied by higher number of frequencies for ring resonance oscillations. So, if a concentric ring and a ring with small hole diameter have only one resonance frequency, then thin-walled rings with a variable cross-section have not less than three natural resonance frequencies of oscillations that makes it possible to increase a range of vibration frequencies and technological capabilities of the ultrasonic system. It has been also found that an intensity in fluctuations of the ultrasonic system is increased even more if at the same time a cross-section of a ring with variable stiffness is decreased as along thickness so across the width.
THE APPROACH TO IMMITATION DECISION-MAKING PROCESS IN SYSTEM OF MODELLING OF MILITARY OPERATIONS
Authors: Rulko E. V. 
Published: July 2018

The main requirement to imitating modeling of military operations adequacy. Proceeding from it is necessary that the behavior of modeling objects has been as much as possible approached to behavior of real objects in the same conditions of conditions or, at least, did not contradict logic of common sense and requirements of authorized documents. It creates necessity of working out of the mechanism, allowing to formalize administrative experience of commanders of corresponding levels and automatically to deduce decisions, on the basis of parameters of a current situation and preliminary set solving rules.As a rule, in decision-making process, the commander operates with difficult formalizable information at level of complex categories. Contrary to it, the object condition in modeling system is described in the form of a set of values of concrete parameters. For transformation of set of parameters of objects to parameters of higher level the method of the analysis of hierarchies is used.Thus there is the second problem demanding the permission synthesis of the device of decision-making on the basis of the received complex concepts. Use of the mechanism of an indistinct logic conclusion for this purpose is offered. In this case preference of a choice of this or that variant of behavior is set depending on character of crossing of the indistinct sets defined by the expert which functions of an accessory are constructed on axes generated before complex parameters. In quality konsekvents solving rules in advance generated strategy of behavior of modeling objects in this connection in offered algorithm actually there is no stage defuzzyfication act, and for accumulation of the conclusions the formula of algebraic association isused. The offered approach allows to carry out an automatic choice of alternative of behavior during modeling without participation of the operator.
SEARCH ALGORITHM FOR THE PARAMETRIC IDENTIFICATION OF THE ELECTRIC DRIVE OF THE MONITORING SYSTEM
Authors: Abufanas A. S. , Lobaty A. A. , Shvedko A. G. 
Published: July 2018

The problem of parametric identification of a mathematical model of a technical system or a device is considered, which considers the electric drive of a monitoring system installed on an unmanned aerial vehicle. Identification of the parameters of elements of a complex technical system is an actual scientific task, since when developing a new technical system for its synthesis and research, it is necessary to have mathematical models of the elements of the system.It is proposed to solve the problem by applying the search gradient identification algorithm for a given objective residual function in the form of a difference in the output signal of the identified element of the system and its model. When solving the problem, the random character of the processes occurring in the system and at the output of the output signal meter is taken into account. The identification algorithm is developed on the basis of the representation of the model of parameters in the form of an ordinary vector-matrix equation, on the right side of which there is a model of the driving influence in the form of a given deterministic function of time. A general structural diagram of the parametric identification search system with a gradient algorithm is presented.As an example for evaluating the operability of the proposed algorithm, we consider the simplest model of an electric drive, given by a transfer function in the form of an inertial link. Qualitative illustrations of the operability of the proposed algorithm and quantitative characteristics of the signal and parameter changes of the identified object are presented.
HASHING ALGORITHM BASED ON TWO-DIMENSIONAL CHAOTIC MAPPINGS
Authors: Sidorenko A. V. , Shakinko I. V. 
Published: July 2018

A new hashing algorithm based on dynamic chaos is proposed. Owing to the use of chaotic mappings, this algorithm is irreversible and a search for two messages with identical hash-values becomes computationally difficult. The proposed algorithm consists of the stages: selection of the variables and of the parameters of two-dimensional chaotic mappings; realization of iterations of the chaotic mappings with the addition of the original-message elements to the variables; realization of iterations of the chaotic mappings without the addition of the original-message elements to the variables; the hash-value formation. The formation of the two hash-values h1 and h2realized with different orders of the variables. The resultant hash-value is obtained by the modulo-2 addition operation applied to the hash-values h1 and h2. The proposed algorithm has been tested. It has been found that this algorithm is characterized by the avalanche effect. The statistical characteristics of the sequence formed of hash-values are identical to those of the sequence with the randomly obtained values of the elements, pointing to the adequate performance of this algorithm. The computational experiment has been realized using the Chirikov, «Arnold’s cat» and Henon maps. It is demonstrated that, with the use of Henon and «Arnold’s cat» maps for the messages exceeding 4 KB, the proposed algorithm outperforms «Keccak» algorithm, being faster by 20% and more.The proposed hashing algorithm may be used in solving the problems of data integrity in modern telecommunication systems.
LINGUISTIC DATABASE FOR AUTOMATIC GENERATION SYSTEM OF ENGLISH ADVERTISING TEXTS
Authors: Metlitskaya N. A. 
Published: July 2018

The article deals with the linguistic database for the system of automatic generation of English advertising texts on cosmetics and perfumery. The database for such a system includes two main blocks: automatic dictionary (that contains semantic and morphological information for each word), and semantic-syntactical formulas of the texts in a special formal language SEMSINT. The database is built on the result of the analysis of 30 English advertising texts on cosmetics and perfumery. First, each word was given a unique code. For example, N stands for nouns, A – for adjectives, V – for verbs, etc. Then all the lexicon of the analyzed texts was distributed into different semantic categories. According to this semantic classification each word was given a special semantic code. For example, the record N01 that is attributed to the word «lip» in the dictionary means that this word refers to nouns of the semantic category «part of a human’s body».The second block of the database includes the semantic-syntactical formulas of the analyzed advertising texts written in a special formal language SEMSINT. The author gives a brief description of this language, presenting its essence and structure. Also, an example of one formalized advertising text in SEMSINT is provided.
MODEL OF RATING OF NON PHYSICAL QUANTITY
Authors: Romanchak V. M. 
Published: July 2018

Physical quantities are distinguished from non-physical quantities the method of measurement. In addition, when measuring physical quantities, the concept of identical objects is considered. For example, is equally likely outcomes in classical probability theory or equality of scale interval of a measuring scale. For nonphysical size we will take measurements by subjective estimation in an order scale, but also to use an undefined notion of the sequence of equally different objects. This approach has been used successfully in some researches for subjective characteristics of the objects. For example, the sequence of stars in the sky of various brightness or levels of difficulty of the test. The numbers of members of such a sequence are called ratings. Having defined rating, it is possible to find values of size if to consider that to equally different objects there corresponds the identical result of paired comparison. As the expert compares objects, without determining the sizes of objects, it is natural to assume that the way of comparison is not known to him. It means that as mathematical model we defined an indirect way of finding of values of nonphysical size at an unknown way of comparison. Having chosen a way of comparison, each object can put number which we will call the subjective size of an object in compliance. In a metrology of ways of numerical comparison of physical quantities only two is a difference and the relation. Therefore at assessment of subjective sizes we will be limited in two ways – a difference and the relation of the sizes of sizes.As an example of application of the theory the functional communication, between physical quantity and nonphysical size, established by empirical laws is analyzed. It is noted that Fekhner and Stephens’s empirical laws use a difference or the relation of subjective sizes. But the difference or the relations of sizes can be expressed through the difference of ratings. Therefore there is an opportunity for each law to receive a ratio between the difference of ratings and physical quantity. Coincidence of two laws of Fekhner and Stephens, after transition to rating, confirms reliability of our model.
USING THE ADAPTED DLP SYSTEM FOR BLOCKING INFORMATION LEAKS
Authors: Andryianava T. A. , Salomatin S. B. 
Published: July 2018

The importance of using the adapted DLP-system in the «Blocking» mode of leaking confidential information of the company is investigated. The scheme of interception of information security events in the «Copy» mode is given, the analysis of which reflects the main drawback of using this mode – the DLP-system works only with copies of confidential documents, while the originals were delivered to the recipient. Such cases inflict enormous damage on companies, so the transfer of critical information beyond the corporate network is unacceptable.A solution is proposed for transferring the operation of the DLP-system from the «Copy» mode to the «Blocking» mode. It is important that the operation of the DLP-system does not hinder the staff members from performing regular operations and does not hinder business processes. Therefore, it is mandatory to adapt the standard DLP-system to the specifics of the company’s activities. After that the transition of the adapted DLP-system to the «Blocking» mode is carried out.Developed: the transition procedure of the adapted DLP-system from the «Copy» mode to the «Blocking» mode, the scheme of the event capture by the DLP-system for the two modes. The main channels of data leaks were investigated, the main leaks were identified by the data type and by the transmission channel. The analysis of the DLP-system operation in the «Blocking» mode is performed.
CAPABILITIES OF APPLYING VISIBLE LIGHT RAYS IN THE SYSTEMS OF HIDDEN INFORMATION TRANSMITTING
Authors: Pyslar I. V. , Brailovsky V. V. , Rozhdestvenska M. G. , Ivanchuk M. M. 
Published: July 2018

Security In the paper some aspects of visible light pulses using for hidden information transmitting are considered. We have investigated perception of the human vision to visual light pulses which have different power and frequency. It is established that pulsed light source becomes invisible at certain ratio of radiating light stream and ambient light level (background lighting (BL)). For example, in the case of background lighting E = 400 lx light pulses following with frequency 50 Hz are invisible when their power is less than 0.12 W. In the paper we represented experimental frequency dependence of the power of light pulses which are invisible for human eye at BL preset level.To eliminate the influence of distracting and masking factors (for example, BL pulsations) we offer to choose LED matrixes powered by stabilized adjustable DC power supply unit as an optimal BL source. Based on experimental data about current and temperature dependences of light stream power and LED matrix radiation spectra we developed a method of assignment of BL level by changing LED current. Approximating equation for dependence of light stream quantity versus LED current in the case of thermostatting is obtained. Temperature self-regulation effect of the heater, which has positive temperature coefficient of resistance, can satisfactorily solve the problem of temperature stabilization of LED background lighting source. In the case of thermostat heater made from material with positive temperature coefficient of resistance 0.48 K-1 the change of LED matrix temperature was 7 times less than without thermostat.To provide research in wide frequency and duration ranges of pulse sequences (10–3–103 Hz and 10–7–1 s) a pulse generator was developed and made using microcontroller PIC18F2550.
USE OF INTELLEGENT AND BLOCK CHAIN TECHNOLOGIES IN INFORMATION MANAGEMENT Minsk Innovation University
Authors: Vishniakou U. A. 
Published: July 2018

The aim of this work is the analysis of methods, approaches, technologies, means of information management (IM), using both conventional technologies and adding new intellectual and block chain. Trends in the use of intelligent technologies in information management are given. The developments in the field of intelligent agents based on semantic web, web-services and semantic web-services, the use of cloud computing (CC) are shown. The main ideas of semantic technologies, in which a page of the semantic network contains information in two languages: the natural and special, understood only by intelligent software agents (IA) are discussed.The use of block chain technology for the control of various material and non-material assets are done. Technically, the block chain technology is another application layer on top of the stack of the Internet protocols and can be integrated with the semantic level. The use of intelligent technologies in the information management in the cloud area with the work of IA. The intelligent web (web 3.0), which became the next stage in the development of the Internet is discussed. It forms the semantics on the ontology dase, creating new opportunities for IA to perform various user requests. Analyzes the major developments in the field of intellectualization of IM, and the main tendencies of their development. The result was a list of criteria and their values, which must meet an intelligent system for IM.As trends in the development of IM is considered the improvement of models and methods of joint activity of IA in the cloud area using block chain technology. Three directions of development of intellectual control system are proposed. As the development of information management proposed the creation of an instrumental platform based on multi agent approach, integrating semantic and block chain technology in the cloud area.
Soil Carbon and Nitrogen Transformations under Soybean as Influenced by Organic Farming
Authors: Tian X.M. , Fan H. , Zhang F.H. , Wang K.Y. , Ippolito J.A. , Li J.H. , Jiao Z.W. , Li Y.B. , Li Y.Y. , Su J.X. , Li W.T. , An M.J. 
Published: July 2018

Organic farming significantly increased or improved many soil properties, including the mean weight diameter of aggregates, soil organic matter, available N, soil microbial diversity, and soil C and N transformation rates. Soybean yield was also 13.7 % greater in the organic farming treatment than in conventional farming treatment.Organic farming increased soil Cu and Ni; however, their concentrations were still less than the allowable limits for organic production.Organic farming with composted manure application improved soil properties and altered the structure and function of the microbial community. The <0.25‐mm aggregate fraction had a major influence on microbially mediated C and N transformations and soybean yield.Organic farmers use natural inputs and ecological principles to produce crops in ways that protect soil, the environment, and human health. The objectives of this study were to determine (i) how organic farming with composted manure application affects soil properties under soybean and (ii) how soil C and N transformations in this system are related to soil microbial community structure, soil nutrient and heavy metal content, and soybean yield and quality. The results showed that three years of organic farming promoted soil aggregation and significantly increased aggregate associated C and N concentrations by 11.7 to 24.1% and 9.4 to 17.0%, respectively. Microbial biomass and species diversity (i.e., Shannon, Simpson, and Pielou indexes) were significantly greater in the organic farming than in the conventional farming. Organic farming also increased soil respiration by 56%, nitrification by 51%, and dentrification by 75%. Soybean yield was 13.7% in the organic farming than in conventional farming. Organic farming increased soil Cu and Ni; however, their concentrations were still less than the allowable limits for organic production. Redundancy analysis indicated that the increases in soil nutrient content, heavy metal content, and soybean yield in the organic farming were closely linked with C and N concentrations in the <0.25‐mm size fraction. In summary, organic farming with composted manure application improved soil properties and altered the structure and function of the microbial community. The <0.25‐mm aggregate fraction had a major influence on microbially mediated C and N transformations and soybean yield.