The current period of creation of the electronic equipment of a responsible and special purpose is characterized by universal introduction of the Quality Management Systems at the enterprises developers and producers of electronic equipment. Quality Management System and its component – Dependability Management System are aimed at providing the guaranteed level of indicators of...
Abstract – in this study, the synthesis method of tolerance deviations on the geometrical parameters of microstrip devices was developed. The synthesis and the research of tolerance limits of the geometric parameters single-link hairpin microstrip low-pass filter was provided. Method of calculation of the filter circuit is based on a quasi-dynamic and quasi-static approximation...
The existing approach to the optimization of the technological processes does not adequately account for differences in quality of products, manufactured by different embodiments of technological process, if output control is not guaranteed to detect all defects. Also not taken into account correction of products quality, which is based on results of control operations. The...
The reasons for nuisance tripping of residual current devices (RCD) are analyzed in the article and the affect of many external factors is discussed. Solutions are described for avoiding faulty tripping of an RCD.
In the article a possibility is considered as to decrease information features at discrimination of vegetable objects. The multiple discriminant Fisher analysis with step-by-step inclusion of variables was used as an algorithm of discrimination. The information features were selected on the basis of the subjectively individual approach. The features were selected from frequency...
Simple analytical relations for calculating parameters of microstrip directional couplers are obtained. It is shown that depending on the power splitting ratio k in the output ports of the circuit the technological restrictions of couplers are changed. At k ≥1 for double-stab four-port directional coupler, unlike three- and four-stab couplers, the range of characteristic...
In this article we propose a method to adapt canceller at the beginning of the range sweep. The analysis of the extent of clutter from meteorological formations and chaff has been provided. It was found that the most difficult conditions to adapt canceller weights occur when exposed to the combined interference in the presence of reflections from the cumulonimbus. We have come up...
The problems of analysis and modeling of requirements while development of e-learning systems with feedback are considered. Subject area of requirements development is determined, choice of CASE-tools for creating models from generated subject area is explained. Visual models of functional requirements and user requirements in the form of diagrams showing the development of...
The problem of optimal distribution of orders among multiple contractors participating in the tender is considered. During tendering when contract is prepared for signing, some additional requirements can appear. If the selected contractor can’t satisfy them, client should choose another contractor or organize one more tender. To avoid this situation client may want to split job...
Research of changes of entropy and energy on signal decomposition is presented. Coifman’s method for the purpose for signal delineation was modified. The method of complex signal delineation based on wavelet transformation and information theory is proposed. The algorithm for the signal components separation is developed. The proposed method based on research of total entropy of...
Object classification problem is considered, where neocognitron and multilayer perceptron may be applied. As neocognitron, solving almost any classification problem, performs too slowly and expensively, then for recognizing shifted monochrome images there is attempted the 2-layer perceptron, being fast only for pixel-distorted monochrome images, though. Having assumed the...
Formed the structure of the orientation and stabilization system for ensuring its active fault tolerance. Parameterized types of failures of the system functional elements, characterized by changes in the properties of the conversion elements. Received diagnostic functional models for solving problems of detection, search the place and establish a class of failure for system...
Arbitrary nature digital binary images signs automatic modeling, naming and recognition are actual scientific and practical problems, which are existing in many areas of information technologies application scopes, particularly in electronic documents processing and analyzing. This article is devoted to a constructive definition of images structure components, that are modeled...
The emergence of a market risk due to performing operations with currency can result insubstantial financial losses. That is why such situations require carrying out of profoundanalysis and management of respective risks. The market risk of this kind is characterized withpossible losses of financial resources due to incorrectly performed operations with currency.The paper...
The problem of computational intelligence systems synthesis in on-line mode, capable for processing stochastic signals with missing observations in the data is considered. An adaptive approach based on using of orthogonal polynomials is developed.
Nowadays engineers and researchers are faced with solving very complex problems in a mathematical modeling and design. Numerical analysis naturally finds applications in all fields of engineering and the physical sciences. The finite element method is a powerful tool for the numerical simulation of a wide range of problems. Implementation of the finite element method in CAD...
The dependence of volume, mass and size on the number of boards and the distance between them in sealed unit of electronic devices is researched. Mass and size characteristics are calculated excluding the mass of electronic components, wiring harness and connectors. During packaging the total mounting of electronic components does not change. Dimensions of each board are included...
The article describes the boundary-value problem of the theory of optimal control for matrix differential equations in the critical case. This problem is urgent for wide range of applications like modeling of linear technological and economic processes. A problem of controlling movement is reduced to solutions of boundary-value problems of n× n systems of ordinary differential...
Digital signature schemes can fulfill an actual task of ensuring fairness and transparency of electronic election. However, existing standards and protocols need modification into blind signature and additional security check by the anonymity criterion. The author examines blind signature protocol provided by Russian scientists. It is proposed to improve scheme‘s efficiency by...
The given work presents the methodology of R-peaks detection in an electrocardiogram signal based on Discrete Wavelet Transformation. The optimal level decomposition of the detail coefficients can be determined by energy, frequency and cross-correlation analyses. The effectiveness of the proposed algorithm has been tested by using records obtained from the MIT/BIH Physionet...
Our article considers the problem of optimization of incompletely specified functions, namely, functions which parameters are given within range of possible values. It is shown that solution of this problem also requires solving problem of determining stability of optimum of such functions to variation of values of their parameters. A method for obtaining such optimum of...
This paper deals with the procedure of synthesis of a nonlinear position controller for the «feeder» of packaging mechanism. The mathematical model of «feeder» drive with regard to the restriction on the control output of external PLC. Linearization of nonlinear characteristic by the «secants» method is implemented and selected functional quality that defines the minimal time of...
Aim of this article is significant improving the quality of services delivered by the software, hardware, and cyberspace networks, as well as reducing the operation cost through the creation of infrastructures IP, providing user-friendly operation, testing and removal of non-functional destructive components. A model of evolving cyberspace is proposed, where the subjects are...
The analytical tools for the number of the redundant measurers and their layout in the unit definition are suggested as a result of the research. The criteria, execution of which provides the functional stability in situation of a measurer’s single complete failure at the classical majority circuit level, are defined. Relatively to a single axis the majority circuit allows to...
At present time, search for ways of improving ergatic systems is going on several fronts. The article highlights the direction related to the reevaluation of the role of the human factor. The urgent need for the development of this trend is due to the fact that for modern ergatic systems the function and role of human operator in them have changed. In the experimental study of...