Information technologies, systems analysis and control
http://old.bulletin.kpi.ua/en/taxonomy/term/38/all
enComposite Design Pattern Application and Application of the LINQ Technology in the Context of the Prefix Encoding of Text Using the Huffman Algorithm
http://old.bulletin.kpi.ua/en/node/2782
<p>The designed methods are the implementation of the object-oriented architecture as the class diagram corresponding to the implementation of the Composite design pattern according to the requirements of the flexible implementation of the Huffman tree, the method of the dynamic iterative Huffman tree building. This tree uses the dynamic collection of the node interface using the Visual C# language and the creation method of the initial set of the leaf nodes using the LINQ technology.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2782" target="_blank">read more</a></p>Composite design patternentropyHuffman algorithmHuffman codinginformation and coding theoryInformation technologies, systems analysis and controlLINQobject-oriented designprefix encodingShannon lemmaSoloshenko O.M.Visual C#Fri, 29 May 2015 15:25:32 +0000admin.bulletin2782 at http://old.bulletin.kpi.uaApplication of Discrete Structures and Numerical Sequences in Block Codes
http://old.bulletin.kpi.ua/en/node/2779
<p>The purpose to compress information using composition of universal codes with the recursive algorithm of original data recovery was achieved in this work. It obtains compression coefficient higher than in symbolic coding. Proposed method of time coding has reasonable values of compression coefficient and its purpose is coding with compression. For this purpose, entirely new kind of universal coding with the polybasic numeral system was created.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2779" target="_blank">read more</a></p>algorithmarchivingcodeencryptionInformation technologies, systems analysis and controlSkuratovsky R.V.Trembovetska O.I.Fri, 29 May 2015 15:21:36 +0000admin.bulletin2779 at http://old.bulletin.kpi.uaThe Information Technology of Automated Data Processing in the Multi-Channel Ultrasonic Measurement Systems
http://old.bulletin.kpi.ua/en/node/2776
<p>The article is devoted to the application of information technology for the ultrasonic measurement of linear distances. The most attention is done on improving the accuracy and expansion bands of measurement. For that problem’s solving, using of the multi-channel ultrasonic measuring system that consists a plurality of sensors with various measuring characteristics is proposed.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2776" target="_blank">read more</a></p>improving accuracy and expansion bands of ultrasonic measurementInformation technologies, systems analysis and controlMenyaylenko A.S.multichannel measurement systemsultrasonic measurement systemsZakhozhay O.I.Fri, 29 May 2015 15:16:58 +0000admin.bulletin2776 at http://old.bulletin.kpi.uaImproving Adequacy of Type-2 Fuzzy Models by Using Type-2 Fuzzy Sets
http://old.bulletin.kpi.ua/en/node/2773
<p>An information approach to fuzzy modeling was considered. The present paper formulates the task of developing a formal approach, which would enable analyzing fuzzy systems in terms of their capability to describe uncertainties of input information using interval membership functions. The discussed approach would allow to introduce the information factor for evaluating the quality of fuzzy models functioning using interval membership functions, and to increase the adequacy of the application area representation by a developed fuzzy model.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2773" target="_blank">read more</a></p>entropyinformation approachinformation quality factorInformation technologies, systems analysis and controlinterval membership functionKondratenko N.R.optimization functiontype-2 fuzzy modelFri, 29 May 2015 15:11:58 +0000admin.bulletin2773 at http://old.bulletin.kpi.uaEstimation of Generalized Linear Models Using Bayesian Approach in Actuarial Modeling
http://old.bulletin.kpi.ua/en/node/2770
<p>The article deals with Bayesian methodology for estimating unknown parameters of mathematical models and the method of analysis statistic data in insurance based on generalized linear models. These models are extension of linear regression when distribution of random variable can differ from normal. For estimating the parameters of proposed models classical and Bayesian approach were used. The main advantage of Bayesian approach is its ability to generate not only accurate estimates but probability distributions too.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2770" target="_blank">read more</a></p>actuarial modelingBayesian parameter estimationBidyuk P.I.forecasting loss in insurancegeneralized linear modelInformation technologies, systems analysis and controlTrukhan S.V.Fri, 29 May 2015 15:07:53 +0000admin.bulletin2770 at http://old.bulletin.kpi.uaAdjustment of the Iterative Reclassification Method for Including the Rejected Appli-cations into the Credit Scoring
http://old.bulletin.kpi.ua/en/node/2722
<p>The objective of the research is the adjustment of the Iterative Reclassification Method for including the rejected applications into the credit scoring. The methodology of implementation uses partially classified data and the logistic regression generalization. The method of the adjustment the Weight Of Evidence and the Information Value indicators using the rejected loan applications is proposed at the first stage.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2722" target="_blank">read more</a></p>Information technologies, systems analysis and controlSoloshenko O.M.Tue, 23 Dec 2014 12:40:04 +0000admin.bulletin2722 at http://old.bulletin.kpi.uaA 2-Layer Perceptron Performance Improvement in Classifying 26 Turned Monochrome 60-by-80-Images Via Training with Pixel-Distorted Turned Images
http://old.bulletin.kpi.ua/en/node/2719
<p>There is tried 2-layer perceptron in classifying turn-distorted objects at acceptable classification error percentage. The object model is a letter of English alphabet, which is monochrome 60-by-80-image. Neither training 2-layer perceptron with pixel-distorted images, nor with turn-distorted images makes it classify satisfactorily. Therefore in classifying turn-distorted images a 2-layer perceptron performance might be improved via training under distortion modification.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2719" target="_blank">read more</a></p>Information technologies, systems analysis and controlRomanyuk V.V.Tue, 23 Dec 2014 12:35:52 +0000admin.bulletin2719 at http://old.bulletin.kpi.uaOptimization of Reinsurance Strategies Using DSS
http://old.bulletin.kpi.ua/en/node/2716
<p>The basic purpose of the work is a study of existing approaches to reinsurance directed towards modeling of distribution and minimization of risk for an insurance portfolio, and forming a strategy for its optimal reinsurance using developed decision support system. A method for a search of optimal reinsurance strategy is proposed. For this purpose statistical models were selected that correspond to the structure and volume of portfolio losses as well as the number of these losses. The simulation model for the total insurance losses is developed.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2716" target="_blank">read more</a></p>Bidyuk P.I.Information technologies, systems analysis and controlKozhukhivska O.A.Polishchuk V.Yu.Tue, 23 Dec 2014 12:30:45 +0000admin.bulletin2716 at http://old.bulletin.kpi.uaOptimization Models and Algorithms for Network Problems of Resours’ Distribution
http://old.bulletin.kpi.ua/en/node/2713
<p>The efficient algorithms for nonlinear programming problems for calculating networks have been offered, as well as the new network models to determine the optimal flows and distribution of resources have been constructed. The problems with nonlinear objective functions of general form and network structure of restrictions, which allow reaching quite a wide range of networks using common approach, were considered. For calculations the modifications of well-known methods of nonlinear programming were applied.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2713" target="_blank">read more</a></p>Alexandrova V.M.Information technologies, systems analysis and controlKirik O. Ye.Tue, 23 Dec 2014 12:13:10 +0000admin.bulletin2713 at http://old.bulletin.kpi.uaForecasting Actuarial Processes with Generalized Linear Models
http://old.bulletin.kpi.ua/en/node/2515
<p>The method for statistical data analysis in insurance based on application of generalized linear models is studied. These models are extension of linear regression when distribution of random variable can differ from normal however belongs to the class of elliptical distributions. The model constructed can be linear or non-linear (for example, logit or probit). For parameters estimation of the models proposed the generalized least squares (GLS) or the Markov chain Monte Carlo methods are used.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2515" target="_blank">read more</a></p>actuarial processesBidyuk P.I.exponential distributionsgeneralized linear modelsIASAInformation technologies, systems analysis and controllosses forecastingstatistical dataTrukhan S.V.Tue, 30 Sep 2014 07:54:46 +0000admin.bulletin2515 at http://old.bulletin.kpi.uaStability analysis of univariate and multivariate systems with multirate sampling
http://old.bulletin.kpi.ua/en/node/1039
<p>The present paper discusses stability and minimum phase of multirate univariate and multivariate dynamic systems. We demonstrate that transition from a singlerate to a corresponding multirate model does not violate properties of stability and minimum phase. Specifically, we establish the zeroespoles ratio of singlerate and multirate models. </p>
Information technologies, systems analysis and controlMilyavsky Yu.L.Romanenko V.D.Tue, 11 Jan 2011 12:21:22 +0000admin.bulletin1039 at http://old.bulletin.kpi.uaTrajectory Behavior of Weak Solutions of the Piezoelectric Problem with Discontinuous Interaction Function on the Phase Variable
http://old.bulletin.kpi.ua/en/node/2518
<p>The autonomous second order inclusion in a bounded domain, which is modeling the behavior of a class of the controlled piezoelectric fields with nonmonotonous potential, is studied. The investigated system describes not only controlled piezoelectric process with multivalued law “reaction-displacement”, but a wide class of controlled processes of Continuum Mechanics. Conditions on the parameters of the problem do not guarantee the uniqueness of solution of the corresponding Cauchy problem.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2518" target="_blank">read more</a></p>controlled piezoelectric fieldIASAInformation technologies, systems analysis and controlKasyanov P.O.Paliichuk L.S.trajectory attractorTue, 30 Sep 2014 08:06:28 +0000admin.bulletin2518 at http://old.bulletin.kpi.uaAdaptive Short-Term Forecasting of Selected Financial Processes
http://old.bulletin.kpi.ua/en/node/2473
<p>A computer based system is proposed for adaptive modeling and forecasting of financial and economic processes, that is constructed with application of system analysis principles. A hierarchical structure of decision making process during forecasts estimation was taken into consideration and the methods were used for describing uncertainties of structural, parametric and statistical nature.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2473" target="_blank">read more</a></p>adaptive forecastingBidyuk P.I.complex criterionInformation technologies, systems analysis and controlKonovalyuk M.M.Kuznyetsova N.V.model structure and parameters estimationnonlinear nonstationary processesPudlo I.V.system approachMon, 22 Sep 2014 16:03:35 +0000admin.bulletin2473 at http://old.bulletin.kpi.uaFormalization of the Problem or Risk Management in Systems of Different Natures
http://old.bulletin.kpi.ua/en/node/2428
<p>The paper considers the problem of formal statement of the general problem of integrated risk management in complex systems as a whole of different nature. Relevance of such formulations caused with the fact that the existing approaches are directed to local non-systemic risk analysis that do not focus on different and often multidisciplinary nature of the risks, and are not able to overcome the problem of cascaded development of risks. The statement of the problem based on the Merton model is considered.</p>
<p><a href="http://old.bulletin.kpi.ua/en/node/2428" target="_blank">read more</a></p>Bidyuk P.I.Information technologies, systems analysis and controlKorshevnyuk L.O.Fri, 12 Sep 2014 15:30:51 +0000admin.bulletin2428 at http://old.bulletin.kpi.uaСтратегическое планирование функциональности ERP/MRP-систем с учетом множественных замещений
http://old.bulletin.kpi.ua/en/node/526
<p>Much prominence is given in this paper to the extended problem of the strategic planning of the ERP systems functionality with the substitution relation, specified on the graph arcs. To solve this problem, a hybrid algorithm, composed of the polynomial and exponential parts is proposed to be used. This algorithm solves a polynomial component of the problem by reduction to the maximum network flow problem, and an exponential one – by means of the original genetic algorithm. Thus, we also provide the numerical experimental results. </p>
Grysha S.M.Information technologies, systems analysis and controlIotko O.A.Thu, 05 Aug 2010 15:16:44 +0000admin.bulletin526 at http://old.bulletin.kpi.ua