During the citation study of serial publications with the use of Journal Citation Reports^® (JCR) a number of items are being revealed (among others) which abbreviated titles cannot be identified with the use of the JCR itself. Typically, such sources are considered unimportant, because they do not have an «impact factor». However, our analysis of the information sources, which abbreviated titles could not be identified with the use of the Journal Citation Reports® itself, convinced us that such sources can be really useful for the specialists. It was also discovered that in the JCR there are mistakes of writing of abbreviated titles in two different ways that relate even the periodicals included in the «master list», i. e. the sources having abbreviated titles established for JCR. The content of the present citation study of serial publications in relation to their ability to support research in the subject of «energy security and energy efficiency, energy efficient technologies and appliances» has made it possible to identify a number of different consequences of such mistakes and the reasons for them. It was found, for example, that the use of double and multiple different abbreviations for the titles of the same serial publication is either due to their objectively existing dual title misinterpreted by the indexers, or due to the inclusion in the citation data of the JCR full titles of the serial publications along with the abbreviated ones, and also by the inclusion in such data in some cases the year of publication or by indicating that the publication issue represents the conference proceedings. All the hard-to-identify abbreviations compel a bibliometrician to take time-consuming laborious identifications and verifications of such titles often followed by the recount of the resulting data.

The results of many years of research in the field of formalizing the task of selecting automated systems for various areas of design and office activities are given. The purpose of the study is the development of methods for qualitative and quantitative evaluation when choosing an automated system, taking into accounts the operating conditions and customer requirements. Qualitative assessment is based on the theory of choice and decision making, which examines the mathematical models of this type of activity. In view of the fact that in the problem under consideration, many alternatives, which are automated systems, are known, it can be related to the choice problem. The peculiarity of this approach is that it does not require a complete restoration of the principle of optimality, but allows us to confine ourselves to information sufficient to identify the optimal variant. The quantitative assessment is based on the determination of the projected annual economic effect from the introduction of an automated system. The described technique can be used by enterprises and organizations in the evaluation of automated systems at the stage preceding the tender for their purchase.

The aim of this paper is the linear synthesis of two loops SISO systems with discreet time proportional integral (PI) controllers. This linear synthesis is dedicated for the systems with plant parameters uncertainty. The synthesis is based on the time scale method, providing the separate slow and fast components of the control low. The PI- controller parameters calculation is based on the modal control and plant model reduction. The conditions carried out for the each control loop dynamics still similar to the second order one. The discrete time microcontroller based numerical control restricts the stability domain of the system and each control loop in it. The stability domain of each loop is the round on the complex plane with radius, depending on the time period. Each inner loop must be more fast, then each outer one. Hence, in the outer loop the time period, required for the PI controller reaction computation, can be more then in the inner loop. This PI- controller parameter calculation method is approximate, and it is efficient for the systems, whose dynamics contains the slow and fast components. In particular, the electrical drives control systems contain the fast electromagnetic component and the slow mechanical part. The effectiveness of this method is illustrated by the example and simulation.

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.

The article gives a classification of the main components of unmanned aerial vehicle (UAV) systems, gives the areas in which the application of UAVs is actual in practice today. Further, the UAV is considered in more detail from the point of view of its flight dynamics analysis, the equation necessary for creating a mathematical model, as well as the model of an ordinary dynamic system as a non-stationary nonlinear controlled object, is given. Next, a description of the developed software for modeling and a description of program algorithm are given. Finally, a conclusion describes the necessary directions for further scientific researches.

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.

The paper presents results of our experiments on compression of the high dynamic range SAR images. The range is equal to 16-bit. Objectives of study were comparison of known approaches to compression of the high dynamic range images; selection of optimal parameters for compression algorithms, and selection of a no-reference measure for image quality assessment after compression. Tone-mapping transformations like gamma correction, Ashikhmin-operator, mu-transformation, as well as no-reference image quality assessment measures were tested. The results of the experiments are presented in the article. It was concluded that further research and analysis of various functions and approaches to compression of dynamic range of SAR images is necessary, since including in the article approaches do not give stable and positive results on all SAR images. It was also concluded that after transformation 16-bit images, it is very difficult to estimate which image is better, and it is necessary to use no-reference image quality assessment measure.

This article presents recommendations on the selection of parameters of the encryption algorithm with variable fragmentation of the block, developed on the basis of a study of the obtained results of the algorithm with different encryption parameters (p and q). The investigation of the algorithm’s work with variable block fragmentation in the selection of various parameters is performed using pseudorandom sequence testing techniques, including statistical and graphical tests on encrypted sequences using various parameters in a binary representation. The statistical test is selected from a selection of D. Knuth tests, namely the correlation check. As a graphic test, we constructed a k-gram distribution. Based on the results of the study of the operation of the algorithm with various encryption parameters (p and q), the following recommendations for the selection of parameters are formulated: p and q are mutually prime numbers, the partition of the sequence into p-subblocks is greater than the partition into q-subblocks (p > q).

Being a part of applied linguistics a language test plays an important role in a modern society. It is used for evaluating person’s language skills not only at educational establishments but also while acquiring citizenship or getting a job. The purpose of the article is the development of a special technique for language test estimation using Item Response Theory (IRT). Short historical review of methods for learning ability estimation is represented. Fundamental principles of Classical and Modern Test Theory is described. The author considers a linguodidactical test as a classical test that patterns four main principles by Kockota V. A. The methodology for the evaluation process of English linguodidactical test with the help of IRT is described in details. Such a linguodidactical test will take into account the level of tasks difficulty, the total amount of tasks, the level of person’s knowledge and testing conditions. This methodology helps to create a test that can assess the real grade of a person being tested.

The main advantage of using information technologies in education, which consists in speeding up and simplifying of information exchange, is also its drawback, because it raises the problem of plagiarism. The purpose of this paper is to develop testing text software for uniqueness in learning management systems. To achieve this goal, it is necessary to solve a range of problems related to the choice of a method for determining plagiarism, its algorithmization and software implementation. The work deals with the methods of shingles, super-shingles, signature methods, vector models of text representation, as well as cluster analysis of text information. The authors suggest a modification of the vector model to improve the accuracy of determining similar documents by creating an N-list of each document separately. As a result, a pairwise comparison of the documents and the formation of the image of one document relative to the N-list of the other will occur. Thus, in the i-th row of the similarity matrix, the coefficients of similarity of all the documents considered relative to the i-th document will be recorded. The proposed modification will also speed up the calculation process, since there is no need to search for common terms for all documents. To analyze a large number of student’s works in order to test them for plagiarism, the authors propose using a cluster approach. Its application showed that the time for determining duplicates for one document and for all documents included in the sample is the same. For the same time it is possible to get all the options for the same works of students. Thus, the use of cluster analysis of text information in determining plagiarism significantly saves both the teacher’s time and computing resources. The software implementation of the proposed algorithms is implemented as a web service in the Java language.