Volume 5 Issue 4
ELECTRONIC NETWORK JOURNAL "RUSSIAN TECHNOLOGICAL JOURNAL"
Volume 5 Issue 4
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INFORMATION SYSTEM. INFORMATICS. PROBLEMS OF INFORMATION SECURITY |
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B.M. Basok, |
ITERATIVE APPROACH TO INCREASING QUALITY OF PROGRAMS TESTING 28 AbstractThe article deals with the problem of improving the quality of applied software (AS) testing. This testing begins with the pre-alpha version and ends at the stage of acceptance testing of the AS. This period includes the process of multiple execution of designed and developed system tests of AS, and includes additional analysis of the program in other ways. We refer to the testing process for a given period of time as a testing cycle (TC), which is usually implemented using the "black box" method without the tester's access to the program code. An analysis of existing methods of tests synthesis showed that these methods not always guarantee an acceptable completeness of testing. Therefore, in this paper we propose an approach to the development of additional tests, based on the analysis of the database of errors (DB) and the capabilities of programmers and testers. These additional tests should confirm or disprove the conclusions about the sufficient completeness of the testing of AS functions during the TC. The work analyzes the types of errors recorded in the database, the level of their influence on the AS, the time spent on their detection and correction. Based on the results of the error analysis, the AS functions that are subject to additional testing are selected. In this approach, the sequence of TC is considered as an iterative process of identifying possible program errors, in which new segments of tests are constructed according to the results of previous cycles. The article gives some practical results obtained in accordance with the proposed methodology and outlines new directions in the study of the effectiveness of AS testing. Keywords: the database of errors, additional tests, testing cycle. |
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MODERN ELECTRONIC AND TELECOMMUNICATION SYSTEMS |
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V.K. Bityukov, |
OPERATION OF DC-DC CHARGE PUMP CONVERTER MCP1253 IN BUCK MODE 25 AbstractThe algorithm of operation of MCP1253 charge pump converter in buck mode is studied for the first time by detailed measurements of ripples of output voltage and flying capacitor voltage. Some experimental results for MCP1253 operation in regulation buck mode at combinations of input voltage 5.1 V and output voltage 3.5 V, input voltage 5.1 V and output voltage 4.8 V and input voltage 2.2 V and output voltage 1.7 V for the range of load current from 2 to 100 mA are presented as examples. Realized investigations revealed that algorithm of MCP1253 operation in buck mode, described by its manufacturer, is not defined the all different cases of its use. The algorithm depends on the ratio between input and output voltages, their values and load currents. Keywords: integrated circuit, DC-DC converter, charge pump, buck mode, flying capacitor, voltage doubler, algorithm of operation. |
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V.K. Bityukov, |
Abstract A motherboard for computer-aided investigation of characteristics of secondary power supply sources has been developed, manufactured and adjusted. A version of such circuit board is made for the purpose of studying a controlled compensating voltage regulator with continuous control function, based on the integrated circuit LM317L. Software for microcontroller PIC18F4550 has been developed which allows to display information on seven-segment LED indicators, respond to the input from a matrix keyboard, exchange data, via interface RS-232 by means of protocol, with a personal computer. A virtual front panel of the test bench for training is created, reproducing a real one, and the developed software allows to use this panel for carrying out laboratory experiments related to studying of principles of operation, the basics of physics and circuit technique of secondary power supply sources, and also remotely controlling of the test bench through USB cable connected to the PC. Besides, the additional software allows to easily design laboratory experiments on the test bench. The additional software enables to easily introduce changes into the virtual front panel, to set different tasks during experiments and even change types of secondary power supply sources under investigation. Keywords: trainer, integrated circuit, linear voltage regulator, virtual front panel, programming of new virtual front panel, programming of new laboratory experiments. |
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M.S. Kostin |
Abstract The results of program-numerical studies of the features of the change in the electrodynamic characteristics of subnanosecond signals during their propagation in inhomogeneous media are presented: in reflection from an ideally conducting surface and propagation through a dielectric. The features of the form-time and spectral transformation of the electric field strength distribution of Gaussian ultrashort impulse signals without carrier frequency filling during their propagation, reflection and absorption are shown. A method of quasioptimal detection of such radio pulses is proposed taking into account their form-time and spectral transformation. Analysis of electrodynamic processes affecting the form-stable change in ultrashort radio pulses in inhomogeneous media has shown results: a change in the angle of inclination of the reflecting surface affects the redistribution of the electric field strength of the reflected wave; It is established that the Gaussian radio pulse, in contrast to the Gaussian, undergoes a slight change in the electric field profile as it passes through the dielectric, due to the effect of dielectric losses in the high-frequency region. The mechanism of the spectroscopic transformation of the distribution of the electric field strength of Gaussian radio pulses makes it possible to judge the possibility of using subnanosecond pulses in radiovision problems. Keywords: subnanosecond radio pulse, Gaussian model, current electric field transformation, electric tension, inhomogeneous medium, effective scattering area, conductive surface, dielectric, quasioptimal detection. |
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M.S. Kostin, |
THE SPECIAL PROJECT REVERSE ENGINEERING STUDY OF RADIOELECTRONIC PRODUCTS 32 AbstractWith the constant dynamics of the complicated development of the designs of radio electronic products, the development of the ECB, the material and technical and production base of modern radioelectronic facilities, the previously applied reverse engineering methods and technologists become ineffective, and therefore knowledge of them can not fully form the New Implementation Strategy Reverse reaction. While the study and analysis of modern methods and means of prototyping of the Defense industrial complex. In this work, methods and means of special design reverse engineering of the topology of multi-layer printed circuit boards and case integrated circuits are considered. The concept of reengineering repair of radioelectronic equipment in security and video sur-veillance is formulated. The presented basic technological processes of reverse engineering of the circuit configuration of printed-film radio electronic products based on various physical principles of destructive and non-destructive special design research: machining and chemical etching, optical scanning, radio vision, X-ray analysis. For the first time, a method of thermal imaging (electro-induction) analysis of printed circuit boards with multilayer topology is proposed. It is shown that reverse engineering allows not only to repeat the design in the form of a modification, but also completely to completely recreate the whole technological production cycle for the sample under study. Keywords: special project reengineering, prototyping, technical counteraction, printing module, integrated microcircuit. |
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MATHEMATIC MODELING |
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I.V. Veselov, |
ENGINEERING METHOD OF MODELING AND OPTIMIZATION OF CHEMICAL-TECHNOLOGICAL PROCESSES 10 AbstractIn the proposed work, the engineering method of modeling and optimization will be described using the example of tire development and rubber products. A new kind of objective function is proposed that allows to determine almost completely optimal technological process parameters (including properties of raw materials and raw materials) taking into account the robustness. Examples of application of the proposed method are given. Keywords: modeling, optimization, regression equations, objective function, technological process, tire production. |
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PHILOSOPHICAL FOUNDATIONS OF TECHNOLOGY AND SOCIETY |
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E.V. Gladysheva |
Abstract The article deals with the problem of combining economic activity and moral principles. Today students often believe that the market economy is incompatible with the morality, the topicality of this topic is grounded in the pedagogical and educational activity of teachers. The steps in this direction are indicated by Moscow Technological University, G.V. Plekhanov Russian Economic University. An article by O.A. Volnyakova on this topic is analyzed. The author of the article analyzes the moral qualities of the native entrepreneurs of the 19th-20th centuries, which contributed to their successful economic activity. It is concluded that the economic success of native entrepreneurs was largely related to such qualities as honesty, diligence, patience, thrift, striving for learning, innovation, philanthropy and charity. The article points out that Russian merchants aspired not only to economic gain, but also to spiritual values. The author of the article shows the modern development of this topic in social entrepreneurship, which only starts developing in our country. The author of the article tells how the theme of the moral dimension of the economy is used by the staff of the Department of Philosophy, Sociology and Political Science of MTU in their pedagogical and educational work with students. This topic can be used by other employees of the Moscow Technological University. Keywords: moral values, economic activity, domestic entrepreneurs, charity, patronage, social entrepreneurship. |
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E.I. Khabarova, |
Abstract The transition to sustainable development requires rejecting unsustainable patterns of production and consumption, it demands that environmental protection policy should be raised to state level. One of the central causes of the ecological crisis is a consumer's attitude to nature. We now realize that market interests are often opposite to the humanitarian interests of citizens in social and environmental security. The attitude to the issues of environmental protection is becoming a permanent component of the management system. Even the ordinary staff of the enterprise has to realize fully the responsibility and obligations for preservation and protection of a favorable ecological situation. Thus, the correlation of economic and ecological interests, only a strictly scientific approach to the industrial technological development can be reached by environmental education of society and professionals. That is why the authors focus on the importance of Foundation of culture for environmentally sustainable production and consumption primarily for the future specialists. The basis for the formation of an ecologically oriented worldview of people can be laid by General and continuous ecological education. It is necessary to give an initial impulse and to teach "to catch up" with the student promptly "running away" technological organization of life. For training of new generation of engineers at leading universities of the world the new principle of the innovative educational environment is implemented: concept of CDIO (Conceive, Design, Implement, Operate). Ecological education in Russia is a set of elements of education and training of all segments of the population today. As a result the following chain is built: ecological education, professional competence, ecological culture. Professional competence of the modern competitive specialist and the head of an enterprise suggests systemic functional knowledge on environmental issues and formed ecological thinking. The possibility of further existence of a civilization depends on competence of today's students. Keywords: "space economy", environmental safety, industrial safety, system approach, the principle of co-evolution, natural sovereignty. |
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