The freely available tabular data represented in various digital formats, such as print-oriented documents, spreadsheets, and web pages, are a valuable source to populate knowledge graphs. However, difficulties that i...
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A spreadsheet is one of popular forms for presentation and transferring data of the same types. The area of using this kind of documents is very widespread. Extraction tables from spreadsheets and their understanding ...
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An approach to digital transformation of environmental monitoring of the Baikal natural territory is proposed, using digital platforms and a service-oriented paradigm, an infrastructure approach, declarative specifica...
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Nowadays geoportals provide some geospatial tools as services, usually implemented using the WPS standard. In this paper geoportal main principles are observed and existing methods and present technologies of classifi...
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New results related to rule-based reasoning component of knowledge-based systems development platform are considered in the paper. Namely, the technique for the alternative way of rule creation based on the decision t...
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The substantiation of the conceptual properties of complex technical systems (CTS) requires the use of knowledge of many engineering disciplines and the involvement of specialists from various subject areas. These pro...
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Spreadsheet data are a valuable source of knowledge in data science and business intelligence applications. However, most commonly, spreadsheets are not accompanied by explicit semantics which are necessary for a mach...
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The development of intelligent systems and their software components (modules) continues to be a complex and time-consuming task. One of the ways to improve the efficiency of this process is to use the principles of g...
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The article considers information technologies for monitoring pollution of lake systems. The authors created a geoportal that provides collection and generalization of the results of researches of anthropogenic impact...
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The paper deals with the problem of optimal packing of two sets of circles (2-D spheres) into a simply connected container. The number of circles is given. The radii of these circles are equal within each set, but, ge...
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The paper deals with the problem of optimal packing of two sets of circles (2-D spheres) into a simply connected container. The number of circles is given. The radii of these circles are equal within each set, but, generally speaking, they differ between sets. There are two different statements of a such problem. The simplest one is when the circles of a larger radius are located first, and then smaller circles are packed into the gaps. Solving of a such problem, in fact, reduces to a two-fold solution of the equal circles packing problem. However, the procedure is complicated by the fact that in the second solution the container will be a multiply connected set. We consider a more complex formulation: it is required to maximize the radii of the circles when their ratio is fixed. The circle packing problem is usually studied in the case when the distance between points is Euclidean and even then belongs to the class of NP-hard problems. We assume that the distance is determined by means of some special metric, which, generally speaking, is not Euclidean. The special numerical algorithm is suggested and implemented. It based on optical-geometric approach, which is developed by the authors in recent years and previously used only for packing circles of equal radius. The results of computational experiment are presented and discussed.
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