Software & Systems

Articles of journal № 1 at 2018 year.

Order result by: Public date | Title | Authors

31. Regularized orthogonal models of probabilistic characteristics with the condition of its basic properties execution [№1 за 2018 год]
Authors: Prokhorov S.A., Kulikovskikh I.M.
Visitors: 2955
The representation of a probabilistic characteristic model as Fourier series is one of the most effective methods for model complexity reduction. The orthogonal function systems are widely used to solve the problems of identification, filtering, and analysis of dynamic systems. This success is often connected to the ability of presenting long time series as a more compact model. There are different methods to guarantee stability and validity of such probabilistic characteristic orthogonal model. They include: optimizing orthogonal model parameters, using numerically stable schemes for computing Fourier coefficients, designing weighted models that allow taking into consideration the aspects of dynamic system behavior, in particular, non-stationary systems, delayed system and so on. Nevertheless, the primary focus of the paper is on the method that takes into account the requirement of executing basic probabilistic characteristics property by an orthogonal model. This method is based on the need of computing the corrections for Fourier coefficients, which are determined with regard to the basic properties of both probabilistic characteristics and basic functions. As a result, a set of orthogonal models requires different implementations depending on a problem statement and a dynamic system. This paper generalizes the previously proposed mathematical models to implement the method that allows the following: to propose a general description of modifying factors in order to take into account basic properties of functional characteristics in a matrix form; to show that the proposed estimates are identical to the estimates regularized with L2-norm; to introduce a kernel function for describing basic properties of functional characteristics. The findings of the present study prove the stability of the proposed regularized estimates. The generalized mathematical models reduce the method of computing the corrected estimates for various functional characteristics to a unique algorithm. Therefore, this significantly improves the computational efficiency of further software implementation.

32. Network-centric control based on micro and macro models of traffic flows [№1 за 2018 год]
Author: S.V. Mikheev
Visitors: 6925
A methodological basis of the technology of network-centric traffic management is taxonomic models of complex intelligent transport geoinformation environment ITSGIS. Geoinformation analysis and taxonomy design led to the de-velopment of an evolutionary technology model of flows behavior on a road network. Network-centric coordinated flow control allows organizing traffic, increasing network bandwidth and improving the environment by reducing transport delays. Any module of the simulation environment ITSGIS localized informationally, as a software equivalent of a class of transport infrastructure objects, is characterized by the triad <ТуреOb, TFunction, Algorithm>, where ТуреOb is a type of class objects, TFunction means actions with objects that are variables of the type ТуреOb, Algorithm means behavior schemes of class instance objects. TFunction and ТуреOb are exported from a module class, Algorithm are encapsulated in it, so that the passivation and activation of Algorithm elements outside the module is mediated. It is produced through the invoking TFunction elements. The ultimate goal of the local control is switching traffic lights within one intersection. ТуреOb for this task are objects of the class “Reguliruemy_Perekrestok”, TFunction is the method MLocalControl. This task is divided into partial tasks (Algorithm): phase formation, arrangement of phases, correction of durations, formation of transition intervals etc. A control purpose at an intersection is ensuring safe and efficient movement. A fundamental criterion of the algorithms efficiency is the amount of delay. When calculating network-centric control using coordination programs, the problems are solved using the graphical analytic method and determination of a phase shift. Object-oriented geotechnologies allow modeling a macrostructure of varying complexity with an arbitrary set of inherent properties in the ITSGIS. Simulation of transport flows passing through the transport network (waysides, intersections, rings, railway crossings, tunnels), which include transport infrastructure objects (regulated and unregulated pedestrian crossings, traffic lights, road signs, fencing, speed breakers, etc.), uses different representation models (micro models, macro models, multi-agent models, intelligent social objects).

33. System of geodynamic 3D-visualization of virtual tourist routes [№1 за 2018 год]
Authors: O.K. Golovnin, N.N. Kutovoy
Visitors: 7728
The paper presents a developed automated system for construction and geodynamic visualization of virtual tourist routes. The system is designed to increase the effectiveness of the decision support process when planning a tourist trip. The route in the software system is presented as a virtual tour containing an equidistant projection of panoramic video records with ref-erence to the terrain coordinates on an electronic map. The system provides dynamic 3D-visualization of a route in a web-oriented applica-tion with the SaaS architecture. The addition to the tourist dynamic video route on an electronic map displays static tourist (historical) ob-jects, also attached to map objects and equipped with a semantic characteristic (text, photos, links to Internet resources, audio recordings). The paper describes the concept of development of a system logical model based on a domain, a general structural system scheme, ap-plied interface modules, tools of connected libraries, software tools and algorithms of functioning. Interaction with the main loaded data in the system occurs using software functions implemented based on computer vision algorithms and image processing using the OpenCV li-brary. The system is based on the ITSGIS geoinformation platform and uses the specialized WayMark software to process the initial data received from mobile geo video laboratories: navigation coordinates, images and video from several cameras. The functionality of the system solves direct tasks of numerous tourist organizations. However, potential consumers of the system should be not only them, but also individuals who travel independently. The developed system provides the formation and visualization of a virtual tourist route and enhances the information mobility of tourists. The system provides search functions for geo video routes according to the following criteria: a minimum route time, a number of points of interest, a minimum or maximum distance.

34. System analysis of the transport infrastructure in gis environment [№1 за 2018 год]
Author: T.I. Mikheeva
Visitors: 7263
In terms of system analysis, among the tasks solved in the framework of managing transport infrastructure functioning, a separate task is monitoring of road network characteristics, traffic flows, means of traffic control. The solution of such problems requires tools that enable these processes by universal creation means and dynamic modification of objects. The models of the taxonomy serve as a methodological and information base for constructing a geoinformation control system for transport infrastructure operation. These models form the basis of object-oriented design tool environments that are focused on complex systems development. The intelligent transport GIS ITSGIS is a tool for geodata storing and processing. It has a great potential in the field of intelligent decision support. ITSGIS scope is based on tasks of network-centric management. Neural network technologies provide ITSGIS intelligence. Neural networks help forming a universal machine that solves a variety of specific tasks from different domains, including in management of transport processes. One of the ITSGIS subsystems is the system of expert deployment of traffic organization technical means on thematic layers of an electronic map, which is designed to check the correctness of road signs and traffic lights installation. To identify areas of accident clusters on the map, the system uses methods based on intelligent Data Mining technologies. A geoinformation component of ITSGIS keeps records on geoobjects (polygon, line, point) of an electronic map with their semantic content (geoobjects’ purpose, affiliation, scanned documents, citizensэ contacts).

35. Architecture and algorithms of the intellectual support system for household sector functioning control process [№1 за 2018 год]
Authors: E.A. Makarova, E.Sh. Zakieva, R.R. Valitov, E.S. Gizdatullina
Visitors: 5781
The paper presents the structure of the intellectual support system to manage a household sector functioning process. The sector interacts with other sectors incorporated within the multi-sectoral macroeconomic system in general. As a controlled object the paper considers functioning of a multi-sectoral macroeconomic system that includes four sectors (real sector, financial institutions and general government sectors, as well as household sector decomposed to regional clusters) and three macroeconomic markets (amenities market, labour market, and money market). The management system structure consists of three management levels. The first management level is based on the feedback control approach and includes computation algorithms of balanced planned rates of population resource earnings and expenditures in the built regional clusters. It is designed for adjusting behaviour of economic sectors during implementation of primary functional processes. The second management level is based on the adaptation principle and is designed for adjusting planned rates of resource expenditures by economical sectors considering a household sector cluster decomposition based on the information on volumes of accumulated resources of the economical sectors, including regional clusters of the household sector; as well as information on the current level of minimum subsistence level, price levels on the amenities markets, labour market, and money market. The third management level corresponds with the level of governmental control over economy in income policy. It is based on the situational management principle and considers controlling actions in fiscal policy and income policy correspondingly. In order to implement controlling actions at this level, intellectual data analysis algorithms and models should be used, as well as connectionist and neuro-fuzzy models and techniques. The structure of the intellectual support system to manage functioning process of the household sector can be used in the software development for decision making support and simulation MMES system including formation of its major functional components and teir interconnections.

36. A universal data model as a data storage tool when solving applied problems of crystal chemistry [№1 за 2018 год]
Author: D.E. Yablokov
Visitors: 6047
Any information system functions properly if its data model adequately represents real aspects of the subject domain it was developed for. The problem of a correct choice of a data modeling strategy, which will allow representing the information context, is very important. The main point of the article is that data modeling, as well as the choice of a data model, is a key stage in database development. It creates a basis of a conceptual framework with terms to work with a storage system. At the same time, a data model is considered as a concept that in the context of concrete data allows users and developers to consider these data as useful information, which re-flects objects states and their relationships within a concrete subject domain. A concept here is a combination of views based on complete and systematized representations, which allows defining a certain way of understanding or interpretation of any objects, events, processes or phenomena that are of information value. The paper gives an example of a simplified universal data model. It is quite general. It can be supported by many applications and provides the addition of any kind of data without specifying the names of tables or fields associated with the abstractions representing real world objects, which are necessary when a using relational data model. When using universal model, it is possible to input information with an undefined structure beforehand. The changing of structural relations such as “entity-attribute”, “entity-entity” or “relationship-attribute” can be made in a runtime mode.

◄ ← Preview | 1 | 2 | 3 | 4