The object of the research, the result of which is the presented work, is a comprehensive system of spatial data of the railway infrastructure, within which a high-precision system of coordinates of the Russian Railways has been created, and methods definition of normal heights in the Baltic Heights System 1977. The strategy and prospects for the development of high-speed transport highways (VSM) have been described. Methods for determining normal heights at research sites are given.
Keywords: Global navigation satellite systems (GNSS), GLONASS, high-speed highway (Navy), high-precision coordinate system (WCC), altitude system, quasi-geoid
In this article, in terms the language of queuing networks, the problem is formulated finding the optimal value the average response time of the system to the requests all users for distributed information processing systems implemented on the basis of the file-server architecture, two-level and three-level client-server architecture with a fixed cost of downtime, including the cost downtime for users, the cost of downtime for a data transmission channel and the cost downtime for service nodes. An algorithm for solving this optimization problem is presented.
Keywords: distributed information processing system, file-server architecture, two-level client-server architecture, three-level client-server architecture state space, average system response time, loss cost, stationary probabilities
It is shown that in the analysis of self-determination it is expedient to use the tools of cognitive modeling. This allows us to identify all the cause-and-effect relationships that provide logical and semantic focus on the desired (target) result of a particular system. The problem of analysis is a special case of the study of the fundamental philosophical category of development, as the relationship and interaction of "things, properties and relations". Formally, the analysis can be reduced to the procedure of semantic and causal interpretation of the original cognitive model. The model allows to study the internal structural organizations that affect the implementation of self-determination of the system. Analysis of self-determination in turn opens the way to effective cognitive modeling, construction of dynamic models, application of game and scenario analysis methods.
Keywords: cognitive analysis, cognitive model, structure, system, self-determination, management, interpretation
A comparison was made between two methods for analyzing trends recorded by the scanner — EMD and EF. Informative components are given to build a forecast that can be used to change the controller in the system.
Keywords: Empirical Decomposition (EMD), Extreme Filtering (EF), Paper Machine (BDM), Real-Time Systems, Frame-by-Frame Signal Processing
The article proposes a structural-functional model of a data storage system based on solid-state drives, implementing deduplication technology to optimize the use of disk space. The concept is based on systems approach. The functioning model is presented in the form of interaction between the control subject (the system administrator) and the control object (the storage system). The system is exposed to external stream of requests from user applications over the Internet. The output parameters of the system include such performance indicators as storage capacity, storage time, storage cost, performance and reliability. The data storage system is presented in the form of four main integrated components, sequentially connected with each other: Network Service; deduplication system based on VDO technology; write management system, software RAID Control System; array of SSD drives. While the flow of requests passes through the system, the delay at each component is determined by the appropriate mathematical model. Such a structural and functional representation of the system allows applying the methods of statistical modeling and queuing theory to its analysis. The use of the proposed model will allow to design a data storage system of the given volume and service life with a minimum storage cost for a consumer with given performance and reliability indicators.
Keywords: data storage system, solid-state drives, deduplication, SSD-drive, RAID-array, modeling, optimization
In the course of the system analysis of scientific and technical information, including patents, it has been established that currently the forestry sector is actively patenting technical and technological solutions for basic operations, but not enough attention is paid to building knowledge bases in the field of technologies and equipment for non-timber forest resources. The formation of databases in this area is caused by identified trends in product development from various types of natural raw materials for the pharmaceutical, food, cosmetic industry and other areas of the social sphere and economy. Among the types of natural raw materials, an important place is occupied by raw materials with a wide range of biological effects, including chaga birch fungus. The development of the knowledge base in the field of engaging chaga in various spheres of the social sphere and economy is based on system analysis and patent search.
Keywords: knowledge base, birch mushroom, intellectual property, forest complex, non-timber forest resources, patent, intellectual property, chaga
The authors consider the issue of assessing partial failure in the technical system from the standpoint of parametric reliability. Evaluation of failure behavior is carried out according to such parameters as time between hours to failure and the achievement of goals, risks. Under the risk in this paper refers to the likelihood of a subsequent failure (full or partial) or the transition occurred in full. The authors propose to expand the range of parameters that characterize hitting a failure state by adding characteristics of possible degradation processes and values of destructive environmental factors in the predicted period of continued operation of the object under study. Also, special attention is paid to the fact that the likelihood of partial failure is influenced by factors that can be divided into external and internal, while the internal ones may depend on external ones. Ishikawa diagram shows the dependence of the rate of degradation of the PR on various factors.
Keywords: partial failure, parametric reliability, risk, time of failure degradation, Ishikawa diagram
A new method, including fuzzification operation, representing the calculation of the membership functions of the key parameters of the R, G, B, RG, RB, GB components of the original color RGB photographs of plant leaves and the GLCM adjacency matrix, the formation of fuzzy conclusions about the type of plant disease, defusing using threshold binarization signs and majority voting on 24 parameters.
Keywords: GLCM - matrix, fuzzy logic, functions of accessories, binarization of key characteristics, majority voting
This article describes a software complex simulation, which allows you to evaluate the impact of the main integrated indicators of the distributed information processing system on its reactivity, taking into account the properties of self-similarity of traffic, TCP/IP data transfer Protocol, and various architectures. The software package consists of software-implemented mathematical models of distributed information processing systems based on file-server, two-level client-server and three-level client-server architecture, as well as the algorithm of distributed information processing system objects distribution. The platform AnyLogic PLE was used as a software tool.
Keywords: a distributed information processing system architecture "file-server", two-tier architecture "client-server", three-tier architecture "client-server", simulation, self-similar traffic, agent-based modeling, discrete event simulation, system dynamics
The article is devoted to the study of the possibility of applying the methods of system analysis in modeling the process of pasteurization of milk. The paper discusses structural-parametric, functional-operator, informational and target management models for a convenient "description" of the pasteurization process. The resulting models and their coefficients describing the process of pasteurization, based on the methods of system analysis, are suitable for the practical solution of the problem of managing the production process. The authors applied functional risk analysis and identified the risks of milk pasteurization.
Keywords: system analysis, pasteurization, milk, risk, modeling, process, functional risk analysis, system analysis, model, production
The article discusses an integrated approach based on the use of expert knowledge to develop a conceptual domain model in terms of monitoring the required operational reliability of technical systems. The need to formalize the key task of logistics analysis is necessary to provide support for the operation of equipment and the creation of an integrated logistics system.
Keywords: integrated logistic support, life cycle, functional failure, operational reliability, severity of consequences
Innovative organizations have begun to use fixed-wing Unmanned Aerial Vehicles (UAVs) for healthcare delivery since they can fly faster and provide a proper solution in locations with difficult access or unsafe to human life. Moreover, they assure greater utility and better cost effectiveness than manned aircraft. However, the wind affects both the longitudinal and the lateral variables of the fixed-wing UAV contributing to its nonlinear and due to such external disturbances the UAV can fail its mission. Therefore, this review paper discusses on effects of wind disturbances on navigation of fixed-wing UAV. Full nonlinear equations of motion by including the effects of the wind on the fixed-wing UAV performance are developed. Also an overview of different approaches is presented.
Keywords: Unmanned aerial vehicle, fixed-wing UAV, navigation control, wind disturbances
In the past few years, China has seen a surge in the use of building information modeling (BIM), and the industry has seen many of the benefits of virtual design and construction. The integration of BIM technology into the industrialization of construction is seen as a promising opportunity to improve the performance of modular and industrial construction. This article first reviews the history of the industrialization of the Chinese construction industry, and then discusses the recent introduction of BIM in China. This paper focuses on using BIM to support modular construction and industrial construction in China. It also discusses the use of some advanced hardware, including the use of 3D laser scanners to collect the collected data and create a point cloud model for better coordination of the MEP system, as well as the use of a robotic total station for quick installation.
Keywords: architecture, BIM, modular construction, industrialization, MEP.
The article presents an analysis of promising research on the formation of vibrational mechanochemical coatings from the point of view of practical use in the real sector of the economy
Keywords: combined methods of treatment, vibration treatment, the vibration mechano-chemical (chemical-mechanical) coverage webrevolve technological system, mechanical coating, fragmentary nature, plastic deformation, uniform coating, vibrowave impact, microstructu
The quantitative methods of risk assessment of technological processes of manufacture and the analysis of level of deficiency of products in the conditions of nondeterministic stochastic parameters are considered. The properties defining reliability of process are its controllability, stability and reproducibility. The main methodical device by assessment and the analysis of these properties are provisions of standards on statistical methods of quality control. In the analysis and assessment of risk it is necessary to consider that borders of a tolerance zone of parameters of products and control limits of reliability of technological processes of its production are always considered as acceptable (admissible) risk levels. Overcoming these levels is considered a negative consequence in the form of increase in level of deficiency of products and decrease in accuracy of technological processes of its production. Technical solutions are always bound to risk as it is never impossible to be sure of the end estimated result in advance. To check whether this risk was justified, it is possible always only after realization of technical solution and approach of an undesirable event. Therefore technical activity in principle can't be completely free from any risk, and it is always necessary to go on necessary and justified risk consciously.
Keywords: technical system, technological process, risk, indeterminacy, management of reliability, negative event, damage, nondeterministic stochastic parameter
The article presents the implementation results of the methods of linear contrasting, image histogram equalization, adaptive histogram equalization (AHE) and contrast limited adaptive histogram equalization (CLAHE) as test software for thermal image processing. It also proposes some ways of enhancement of the CLAHE method that eliminate the necessity to manually select the parameters to be changed.
Keywords: image processing, computer processing, histogram processing, histogram equalization
This article formulates the main stages of the process of constructing analytic-numerical models of functioning of distributed information systems with non-exponential (self-similar) input traffic of requests. Each separate stage of modeling, at the conceptual level, is reduced to solving a certain class of mathematical problems. The basis of the mathematical apparatus for obtaining the basic integral characteristics of the quality of distributed information systems functioning lies in the method of analyzing the average values of networks of queues. The basic relationships for calculating the reactivity of distributed information systems operation are given.
Keywords: distributed information system, discrete self-similar process, Hurst parameter, Pareto distribution, queuing network, Kendall classification, Polacek-Khinchin formula, average system response time
The model of the occurrence of failures as a result of aging of insulation materials of power cable lines is considered. It is shown that the residual life depends on the ratio of the safety margin and the ultimate strength of the materials used. A simulation of the resource actuation processes was carried out using a mathematical model of the insulation state that relates the time and probability of its trouble-free operation with certain parameters of it. The model allows to predict the state of the insulation and the service life of the power cable lines.
Keywords: Reliability, life, insulation materials, heat aging
In the paper the authors attempt to present the author’s model of reproduction of social scenarios from the prism of the interaction of language with social culture, and also a weighty rationale for the practical value of this model is given, which can serve as a methodical key to decoding whole blocks of social space perception. Such an approach may indicate the discovery of new modes in understanding social reality. Although the interpretation of the facts of a language is characterized by methodological difficulties, such a vision can help identify, on an empirical level, changes in the sociocultural sphere, as well as trace the dynamics of social scenarios of perception of reality by different categories of the population
Keywords: social scenario, semantic reproduction, language, language situation, scenario installations, social culture, language modeling, social world, conventionality, language situation
The authors analyzed the accident statistics with the participation of motorcyclists in the Russian Federation. The results of an expert study of a road accident involving a motorcyclist and a car are presented. Determined the cause of the accident. On known mathematical dependences it is established that at observance by the driver of the motorcycle Of traffic rules road accident could not occur. This conclusion is confirmed with the help of the program "Automaker".
Keywords: traffic accident, expert analysis, motorcycle, accident
The following work looked into sensitive analysis. Sensitive analysis is used to gather some data of analysed problem and further to reduce the time required to run a simulation. The work explains importance of the tool in field of mechanics engineering. The work briefly outline applications of the tool in industries. Also I-beam analysis was done to better understand influence of sensitive analysis. The results illustrated that by reducing nodes in the geometry of the I-beam the output values stay the same, but too much reduction will lead to incorrect results. The comparison of the two methods also took a place in this work, to see the correlations and discrepancy of the problem.
Keywords: sensitive analysis, time reduction, finite element, I-beam, simulation
In the article, the authors present the results of studies related to the effect of partial failures (PF) on the reliability characteristics of the system, determined through the probability of continuous operation over the interregional period under the conditions of continued operation after PF. The computational model is based on the assumption that the process of continuing to function after a spacecraft can be considered as redundancy by substitution, when the reserve appears capable of performing post-failure functions, but with some change in the reliability characteristics. The entire work interval is divided into separate sections inside, which the technical system operates with new reliability characteristics, with the sequential occurrence of several PF. A model with an exponential law of distribution of probabilities of partial failures is considered. It is believed that testing the device of the entire interregional period without a complete failure can be characterized as the product of the probabilities of the absence of a complete failure on the considered time interval, the absence of the occurrence of destructive external influences exceeding the critical values, the error-free processing of the program by the expert system and the absence of errors in the operator's actions. The results of the illustrative calculation are presented and conclusions are made.
Keywords: partial failure, redundancy, indicators of reliability of working out in the interregional period, calculated ratios for assessing reliability in case of partial failure
An important aspect in the creation of information and training systems for training and advanced training of technological personnel of industrial enterprises is the development and implementation of mathematical models of the studied technological processes at the stage of forming algorithmic and software of such systems. The considered information and training system is associated with the blending and casting of aluminum alloys of various grades. The system contains the necessary amount of theoretical information that describes the basic principles of aluminum production using the most well-known technological operations aimed at the formation of the required metal alloys with a given chemical composition. The information-training system is based on a mathematical model of the technological process, in the development and description of which both the principles of informational similarity and the physicochemical laws are used using experimental-statistical modeling methods. The structure of the information and training system consists of structural units that interact logically with each other, which allow the formation and solving of various technological problems of melting aluminum melting in smelting furnaces. Each unit has a certain meaning and performs the required amount of load. The system consists of seven important and weighty structural units. The interactions of the studied production object with the control actions and external disturbances make it possible to form the initial parameters of the task, which in turn become the basis for user interaction with the training system. The user interface of the system allows visualizing the aspects of technological change that are taking place and storing the student’s corrective actions for further analysis in the computer’s memory. If necessary, the system can provide the user with the opportunity to use the potential of an interactive assistant, in the event that he is difficult or unable to determine the weight of the next corrective adjustment. The interactive assistant based on the current parameters of the technological problem is able to determine and suggest to the user the use of the most optimal control action for the best solution of the problem. Thus, when introducing these principles of training, the system should show its effectiveness by reducing the final cost of the finished metal products, by reducing errors in technological operations and empirical calculations of the masses of the components used, increasing its consumer qualities.
Keywords: mathematical model, model-simulator, technological problem, system structure, physico-chemical patterns, chemical composition, control actions, control mode
To form a knowledge base, a systematic analysis of patentable technologies and equipment for handling spent nuclear fuel was carried out. In the analysis, intellectual knowledge bases were formed regarding the technology and equipment objects being improved or replaced, taking into account their role in the end-to-end technologies and related operations of these processes. The research results showed the effectiveness of the formation of a knowledge base and its use for the synthesis of new intellectual property. As a result of the work done, new technical solutions were found regarding the design of containers for transporting and storing spent nuclear fuel from nodular cast iron. The significance of the solutions found is confirmed by obtaining patents for invention in their respect.
Keywords: spent nuclear fuel, patent, transportation and storage, transport and packaging containers
This article discusses the use of regression analysis in violation of the assumption of the normal distribution of observations. The analysis of the following work illustrated that the theoretical distribution of observations may differ significantly from practical research if normal law is rejected. To solve this problem, which is one of the central ones in statistical analysis, stable estimation methods were studied and applied. Based on the results obtained, a software product was developed that implements this statistical method.
Keywords: Normal law distribution of observations, stable estimation methods, M-estimates, software implementation