Software & Systems

Articles of journal № 1 at 2015 year.

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21. Software system of distributed design of complex VHDLobjects [№1 за 2015 год]
Authors: Afanasev A.N., Афанасьев А.Н., Khorodov V.S.
Visitors: 8078
The authors propose the architecture and describe the technologies of a distributed design system of complex VHDL objects. They also present the main functional modulesof subsystems and their interrelationships. A multi-agent approach is a basis for system organization, eight types of role agents are developed. The proposed description of existing agents which allows us to understand the role and place of each agent in the work of the whole system as well as the formation of a full design solution. A methodological basis of the design includes structural-functional linguistic models which are formed from the designed device VHDL description. The paper describes the program structure peculiarities on VHDL language to create a library of objects, solve design tasks by several designers in parallel, use objects from other projects and test projects with the same methodology. The article represents a design process in the system from development of designed devices specifications to saving design decisions in the knowledge base. It also describes the concept of MVC template in the form of sequence diagrams to represent functional authorization and broadcasting code on VHDL hardware description language in the structural and functionallinguistic model. The proposed system provides the development and filling of VHDL programs library which allows reusing design decisions with data modification according to requirements for new tasks. Implementation of this system allows making design more efficient due to the transfer of routine operations (search and synthesis of the design solutions) to agents as well as improving the quality of process control of collective design and reducing development costs.

22. Program complex for calculation and research of the inaccuracy of turning nonrigid blanks [№1 за 2015 год]
Authors: Shelikhov E.S., Serdyuk A.I., Chernousova A.M.
Visitors: 7252
The authors consider the problem of inaccuracy definitionarising when turning blanks with the length great-ly exceeding their diameter on CNC machines (computer numerical control). The authors have analysed mathematical models for definition of inaccuracies in the course of turning. The result showed that for the considered details the defining factor when forming inaccuracies is rigidity of MTTD (Machine-Tool-Tools-Detail) system. The paper also markes restrictions in the existing methods of research and practice of defyingdevia-tions taking into account constant and dynamic components of system elements flexibility. In particular, in terms of practi-cal significance, there are difficulties with accounting of elastic deformations caused by functional interrelations of cutting conditions with blanks parameters which are set by strength properties of the used material in the considered range of geo-metrical ratios. To increase the accuracy of processing, the authors offer a technique for determining optimum cutting pa-rameters. OptimRez software package allows the user to define cuttingmodes to minimize the considered inaccuracy taking into account the applied turning equipment capability and characteristics of processed blanks. Software package includes five in-terconnected modules, uses databases containing tools, machine tools and different workpieces. OptimRez can be used in process engineering, in research projects and educational process.

23. Software for representation and transformation of discrete knowledge structures [№1 за 2015 год]
Author: Subbotin S.A.
Visitors: 12744
The article shows developed software that allows representing different knowledge models in a common language. It also contains the procedures automating the conversion between different expert knowledge. The developed program has a modular structure and contains subsystems for different knowledge representation models. The semantic network modeling subsystem contains functions for creation of the semantic network structure, adding nodes and links, deletion nodes and links, for graphic display of a semantic network with a circular, random and hierarchical arrangements of nodes, as well as a function for searching a subnetwork-request in the knowledge base network. The frame network modeling subsystem contains functions for creating frame model structure, frame creating, adding frames as nodes in the network, removing frames from the network nodes, adding and removing links between frames, graphical displaying of hierarchical frame model, and searching frames. The production model modeling subsystem contains a set of functions for knowledge creation, modifying and processing based on production models. They are: creating a model structure, adding the variable and question, adding a rule, graphical displaying of rule network, searching the basis of production model using different strategies of rule conflict resolution. The subsystem of transformation and analysis of knowledge representation structures provides a mutual conversion of knowledge from semantic networks, frame and production models.

24. Human health controlling system: functional requirements and architecture [№1 за 2015 год]
Author: Nefedov O.Yu.
Visitors: 10614
Nowadays the demographic problem is a urgent issue in Russia. This situation is mostly caused by high mortality rate among Russian population from chronic no communicable diseases and low health level in general. It’s generally agreed that these mortality reasons are preventable and reduction of chronic disease risks is easily achievable with human health management system. Health management process requires significant resources of health system and first of all it is about staff. This problem is partially solved when shifting the health system focus to preventive care rather than dealing with the consequences of diseases. But it is also necessary to make a health management process effective and comfortable for patients and physicians, as well as to optimize the cost of the health system to support it. Health management information systems are an innovative approach to solving these problems. Herewith the information technologies in health management allow making continuous monitoring of health status and high efficiency in medical decisions which is the key to effective management. The article presents a developed of human health controlling system. The objective of the system is information support of health management process for patients with identified chronic diseases and patients wishing to maintain their health state at optimal level.The paper considers a variant of system implementation based on service-oriented architecture, as well as functional requirements for such systems. The article also considers the main principles of health management which are a base for this system and health management scheme using information systems.

25. Tasks specification in a self-organizing informationsystem [№1 за 2015 год]
Authors: Drozhdin V.V., Shalaev A.A.
Visitors: 9566
To ensure self-modification and self-improvement, a self-organizing system should identify intra-system problems and address them via tasks formulation and accomplishment. The article presents general task specification and defines its components. As a method of solution, we suggest using semantic and constructive descriptions. The paper defines corresponding rules between a task and a method of its accomplishment and discusses the ways of forming a method that addresses the task at hand. This article highlightes the advantages of using under-defined tasks in a self-organizing system and suggests a number of ways to complete task definitions in the following cases:a) incomplete coverage of the task definition domain by the problem definition domain, b) solution method partial constraint satisfaction in relation to the initial task conditions, c) deviations from the transformations of the initial data into a solution method equivalence and from the data conversion methods that were initiated by the problem. The paper proposes the semantic task specification as a concept-task and relationships between the concepts. The concept-task consists of an identifier, a composition, content, a solving method, an external description and macro properties. Possible relationships between concept-tasks include aggregation, classification, generalization and abstraction.Semantic specifications of the tasks that are known to the system and are to be resolved in it can be used to form a layer oftasks in the “problem – task – subtask – method of solution – knowledge” semantic domain. In conclusion, the problem formulation and solution allows the system to resolve any issues that arise during the course of its operation. In addition, the use of the under-defined tasks significantly enhances system troubleshootingand makes the process more efficient.

26. Multiprocessor systems memory testing [№1 за 2015 год]
Author: Lavrinov G.A.
Visitors: 9656
Memory is one of the basic elements of a computer system. Depending on the application sphere of mul-tiprocessor systems there are different memory requirements: information capacity, memory speed, etc. Memory test is one of the most important stages of system testing in general when creating such systems. A memory test includes test-ing address bus, data bus, and memory cells verifying of a device under the test. Depending on the method of testing RAM in an automatic data processing machine is divided into: local that is accessible directly from the processor ele-ment and remote that is accessible to read/write memory via communicative interface for distributed memory systems. This article considers the method of RAM remote testing in a multiprocessor system with RapidIO communicative in-terface. There is a testing procedure on the example of 1890VM6IA processors. Based on RAM tests (checking own address, walking one (or zero) and random values checking) the paper shows a comparison results of testing time de-pending on the test execution device. The author presents an assessment of this method efficiency. The approach al-lows using a minimum hardware set.

27. Pedestrian flows control at peak traffic [№1 за 2015 год]
Author: Anikeev E.A.
Visitors: 10939
The article shows the relevance of the problem of motorization growth comparing to road network. It highlightes the problem of transport and pedestrian traffic regulation at pedestrian crossings outside intersections with traffic lights ringing. The paper considers a traditional way of solving this problem. It shows the factors leading to traffic jam crea-tion during peak hours when using the conventional method. The authors display the previous solution to the problem. Then they give the cycles of traffic light functioning with rigid management and traffic fuzzy control. There are definitions of input and output variables to control the traffic lights at the intersection, as well as the membership functions of these variables. The authors propose principles of determining an outputvalue. These principles are a base for fuzzy rules designed for a con-trol algorithm. The authors also propose a model of the functioning of this intersection, as well as the algorithm ofthe pedes-trian traffic lights ringing based on fuzzy logic. Thepaper shows modeling of the vehicles queue accumulation process at a crosswalk located outside the intersection under peak vehicle and pedestrian traffic. The theory of fuzzy sets is used for mod-elling. It allows simulating the expert conclusions in thefield in making decisions about changing the durationof waiting pe-destrian phase. There is also a simulation of the transition regulatory process using a traffic light with a constant latency phase and a phase defined using fuzzy rules. The authors give simulation results that show cars queue accumulationin both cases and the advantages of the proposed method comparing to conventional rigid regulation.

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