Software & Systems

Articles of journal № 3 at 2019 year.

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21. Information support for decision-making in the case of an emergency at gas pipeline facilities based on production rules [№3 за 2019 год]
Authors: O.I. Khristodulo, A.S. Samoylov
Visitors: 4979
Specialized organizations provide gas to industrial enterprises using a set of complexes of hierarchical-ly and geographically distributed objects that are interconnected at the regional level, but at the same time they are part of the gas providing system at the federal level. The process of providing gas to industrial enterprises is associated with the processing of infor-mation about objects with a special feature consisting in the important role of a spatial component. The paper analyzes the problem of gas providing to industrial enterprises and considers the features of information and spatial objects used in the process of gas provision. It also demonstrates the need in using the geographic information system to keep up to date, process, analyze, monitor the integrity and consistency of information about spatial objects of a gas distribution organization. There is a description of the spatial information on gas supply facilities of industrial enterprises (gas distribution stations, high and medium pressure gas pipelines, stop valves, gas reduction points, places of possible accidents, etc.) and the main characteristics of these objects. Moreover, the paper presents production rules based on the formal knowledge of experts and describing the actions of a dispatcher in the case of an emergency on a gas pipeline. There is a scheme of using a knowledge base based on production rules for information decision support in the case of an emergency. Information support for making decisions on the localization of an emergency at gas supply facilities of industrial enterprises is based on using spatial information about objects directly from a distributed spatial database. Data analysis using formalized expert knowledge allows simulating an emergency, calculating the amount of gas in the pipeline and generating necessary reports.

22. Graphical shell development for parallel calculations based on the OpenFOAM platform [№3 за 2019 год]
Author: Chitalov, D.I.
Visitors: 5196
Graphical interfaces are an essential element of human-computer interaction. They form input data for programs and visualize results. Commercial software mainly comes with built-in graphical interaction tools. At the same time, some open software solutions (the OpenFOAM platform in particular) do not have built-in interaction tools. This problem remains relevant since the existing graphical interfaces have disadvantages. This paper presents a step-by-step process of developing a graphical shell for implementing user in-teraction with the OpenFOAM platform, i.e for setting up numerical experiments applied to problems of continuum mechanics in the parallel execution mode. To achieve this goal, there is a defined list of tasks and necessary tools: Python 3.5 programming language, PyQt5 interface element description framework, PyCharm integrated development environment. The paper gives diagrams showing the interconnection of program modules and a program operation mechanism. The results of the application development and testing are formed by the example of a pro-ject of one of the standard tasks of continuum mechanics, which are a part of the OpenFOAM platform distribution kit. The authors provide scientific novelty of the research, in particular: serialization of numerical experiment parameters using the Python Pickle module and database tables in the SQLite format; the ability to create different versions of files with continuum mechanics task parameters; the ability to run console commands using bash scripts. They also identify the practical value of the work and future prospects.

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