Begell House Inc.
Journal of Automation and Information Sciences
JAI(S)
1064-2315
40
9
2008
Periodic Solutions of Evolutionary Equations in the Class of Nonreflexive Banach Spaces
1-19
Sperantsa
Toscano
Salerno University, Italy
Pavel O.
Kasyanov
Kiev National Taras Shevchenko University, Ukraine
Nina V.
Zadoyanchuk
Kiev National Taras Shevchenko University, Ukraine
Valeriy S.
Melnik
Institute of Applied System Analysis of National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kiev
We consider the differential-operator equations with nonlinear mappings of the wλ0-pseudomonotone type in the class of nonreflexive Banach spaces. On the basis of the Dubinsky method the theorem about the existence of a periodic solution is proved. A priori estimates of solutions are obtained.
Research of Method of Multidimensional Discrete Systems Iterative Identification
20-35
Aleksey O.
Zhukov
National Technical University of Ukraine "Kiev Polytechnical Institute", Kiev, Ukraine
Vyacheslav F.
Gubarev
Institute of Space Research of National Academy of Sciences of Ukraine and State Space Agency of Ukraine, Kiev, Ukraine
The method of iterative identification of multidimensional discrete systems is investigated. On the basis of this method the algorithms oriented on sequential recovering of separate clusters of modes called submodes are developed and proved. Therewith the dimension of approximating model is in accordance with the input data, that is important especially during identification with the bounded uncertainty.
Numerical Solution of Incorrect Problem of Single-phase Flow in Two-dimensional Oil Pool
36-47
Hanlar Mekhvali ogly
Gamzayev
Azerbaijan State Oil Academy, Baku, Azerbaijan
Consideration is given to motion of a single-phase fluid in a circular oil pool in the course of its development by means of system of wells. Distribution of pressure on external boundary of an oil pool is assumed to be unknown. The technique of determining fields of pressure during oil pool development based on data received from wells is offered.
Is the Theory of Automatic Control not only Engineering but also Basic Science, Fundamentally Different from Physics and Biology Related?
48-52
Yuriy I.
Alimov
The Company "Data Center", Ekaterinburg, Russia
Some reasons are given in favour of the positive answer to the question posed in the title of the article
Automatic Text Documents Summarization through Sentences Clustering
53-63
Ramiz Magamed ogly
Alyguliev
Institute of Information Technologies of National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
Rasim Magamed ogly
Alguliev
Institute of Information Technologies of National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
To provide minimum redundancy in summary and maximum possible covering of the document content one has proposed the method of automatic summarization of the text documents based on sentence clustering. Sentence clustering is applied to determining topics and informative sentences. The clustering problem is formulated as a binary quadratic interger programming problem. The number of clusters (topics) is determined by deliberately developed algorithm. The synthesis algorithm of neural net for solving clustering problem has been described.
Formalized Methods of Paralleling the Goldberg−Tarjan Algorithm
64-75
Sergey D.
Pogorelyi
Kiev National Taras Shevchenko University, Ukraine
Yuriy V.
Boyko
Kiev National Taras Shevchenko University, Ukraine
Sergey I.
Lozitskiy
Kiev National Taras Shevchenko University, Ukraine
Artem D.
Gusarov
Kiev National Taras Shevchenko University, Ukraine
We describe the transformation of the Goldberg−Tarjan algorithm, which solves the significant network problem of finding the maximum flow in an oriented graph. The concept of its parallel realization and the corresponding scheme of the algorithm, using the mathematical apparatus of the modified systems of the Glushkov algorithmic algebras, are formed. Two optimized schemes of the algorithm are obtained.
On One Model of Access Differentiation to Resources of Information System "Population and Migration" by using Petri Nets
76-79
Fargana
Abdullayeva
Institute of Information Technology, ANAS
The authorization model that allows users to gain access to required resources of information system "Population and migration" has been offered. For this purpose the mechanism of granting and revoking privileges to users has been applied. The authorization model implements the functions of the role-based access control of a user by means of colored Petri nets.