Model Of Operation Process Research Articles

МЕТОДЫ АНАЛИЗА И СИНТЕЗА ИССЛЕДОВАНИЯ ЭФФЕКТИВНОСТИ ПРОЦЕССОВ ФУНКЦИОНИРОВАНИЯ СИСТЕМЫ ОБНАРУЖЕНИЯ ПРЕДУПРЕЖДЕНИЯ И ЛИКВИДАЦИИ ПОСЛЕДСТВИЙ КОМПЬЮТЕРНЫХ АТАК

The article considers characteristics used in the study of military and technical system efficiency. It determines the function and the sensitivity coefficient in relation to the theory problems of operation efficiency. The authors describe distinctive features of aspect, parametric and aspect and parametric synthesis, as well as an algorithm to determine the parameters of the analytical model of the operation process for the system under consideration. The article discloses an influence of the operational situation characteristics on efficiency of the computer attacks detection, prevention and consequences elimination system. The authors have developed a method to analyze influence of the parameters of the system operation process model on the efficiency parameter.

Application of Markov Model for Determination of Average Lifetime of a Transformer Distribution System

Abstract The study presents an analysis of the operation process of elements of a system for electrical energy transformation in natural conditions of their usage. The research object is a system of HV and MV distribution transformer operation. The method of construction and an example of the Markov operation process have been presented for the analyzed technical objects. The model of the operation process was built on the basis of analysis of spatial states and events involved in operation of the analyzed technical objects. An average lifetime of the analyzed technical system was determined for assumptions accepted for a stochastic process which is a mathematical model of the distribution transformer operation process.

COVID-19, a Breakthrough in Educational Systems: Keeping the Development of Language Learners’ Autonomy at Self-Access Language Centres

This article presents two flexible operational process models (OPM) that could serve as guidelines for a self-access language centre (SALC) in the provision of advising services and workshops not only at difficult times such as the one caused by COVID-19, but also on a regular basis The aim of the models is to provide a vision to plan, monitor, evaluate and improve the processes involved in the provision of the above mentioned services which have been described by a number of authors as approaches to fostering autonomy in language learners Tassinari (2010) sees these two approaches at SALCs as a way to offer support and guidance for learners on their path towards autonomy The OPMs presented in this paper include a reconsideration of the relationships between the implementation of a quality management system (QMS) offered by the International Organization for Standardization (IOS) and the processes involved in the planning, monitoring and eventually evaluating the steps involved in the enhancement of learner autonomy and language learner competence in a SALC Keeping in mind that if a SALC opts to implement a quality approach in the provision of their services, it will require a fundamental transformation in its managerial strategies, not only to obtain a quality award, but also if they choose to improve their management processes related to the provision of its services as well

Modeling of disk sowing apparatus operation process

As foreign and domestic experience in livestock breeding shows, cultivated pastures are highly efficient and are considered to be a reliable source of consistent provision of animals with green feed during the pasture period. Free feeding of animals on pastures is a natural way of feeding them, which is created by nature within the framework of a single ecosystem in which natural grassland vegetation grows. One of the most expensive items in animal breeding is feed production. To exemplify this, when keeping animals on cultural pastures, there is a decrease in the relevant share of expenses for feed production in the structure of aggregate expenses compared to their management in livestock buildings by 2 times (from 60 … 65% to 30%), and the expenses on purchasing fuels and lubricants by 6 … 7 times. It has been established that in the North Caucasus region three methods of creating cultural pastures are used: based on existing natural and artificial grasses through their surface improvement (by carrying out cultural work, regulating the water-air regime of the soil, combating weed and poisonous vegetation, sowing grass, fertilizing); radical improvement of natural fodder farmland, i.e. the creation of artificial cultural pastures; using pasture crops of perennial grasses cultivated on strongly eroded slope lands to reduce or eliminate erosion processes. As can be seen from the above, the problem of creating cultural pastures on sloping lands is of great current interest.

Designing the organizational process of managing logistic events in restaurant business

The block diagram of logistic system intercommunication in hotel business restaurant business is elaborated. The local modeling of operation processes of goods purchase taking into account the limits of financial resources is made. The sales point of goods is determined. At the present stage of the development of the economy of services in the world and Ukraine, the need to optimize the hotel and restaurant product is urgent. The application of logistic management principles can be significantly beneficial in the tourism and recreation industry thanks to the accumulated experience in the creation, implementation, monitoring and control of supply chains. In the case of the formation of a supply chain in the tourism industry, especially important skills, advanced and professional knowledge in the transport system of cargo and passengers, knowledge in information and financial logistics. The problems of logistics management point to the need for a systematic approach to the management of each tourist enterprise. Thus, an expedient direction to improve logistics management is to provide mechanisms for the intensive development of regional tourism on the basis of a systematic approach to management through the cooperation of tourist enterprises, as well as the introduction of a unified information system with a new data bank, first of all, on the features of regional tourist products. The results of logistic and marketing analysis indicate the expediency of reforming the organizational structure of management of tourism enterprises through the creation of logistics departments. The article describes the basic principles of stimulation of labor at enterprises of the tourism industry. The systems of payment and stimulation of work of employees at the enterprise are described. Differences in wage systems are investigated. The main factors of satisfaction with the work of the tourism industry are revealed. Recommendations for optimizing the incentive system are given A significant number of tourist enterprises, we were invited to improve the existing organizational structure. Thus, we can conclude that in most domestic hotel and restaurant enterprises, logistic control systems, as such, are practically absent.

Mathematical modeling of operation processes of refrigerant compressor self-acting valves of domestic refrigerators

The article presents a mathematical model of refrigerant compressor self-acting valves for domestic refrigerators providing a set of data characterizing compressor operating cycle: change in the cylinder pressure, change in cylinder volume, and change in gas flow entering or leaving the cylinder, change in moving trajectory of the valve plate. The technique and algorithm for calculating valves parameters in the compressor operating cycle is proposed. The presented mathematical model provides valves calculation and ensures calculation analysis of the valves depending on their parameters for a particular model of a refrigerant compressor.

An Optimization Method for Operation Adjustment of High-Speed Delayed Trains

Train delays have a great impact on the schedule of high-speed railways including overall efficiency and the quality of the travel service of the passengers. Therefore, the development of an approach to recover a schedule via timely and rapid operation adjustments must be investigated. In this paper, a complete final real-time adjustment scheme is proposed for the train dispatcher of a railway enterprise for delayed trains. A train operation process model based on the Max-Plus algebra method is proposed. Six operation adjustment strategies are analyzed including section acceleration, operation based on the original timetable, dwell time reduction, increase in overtaking, reduction in overtaking, and train postponement. An approximate model is then built based on the minimum number of delayed trains considering the constraints of the adjustment strategies and the feasible adjusted schemes can be quickly obtained without any record specific time data and constraints. The set of feasible solutions of the approximate model is then regarded as the importation of the second model. In addition, the second model is an optimization model for operation adjustment with the least average delay time of each train at each station by updating the state matrixes of the train operation process model. The algorithms are designed for these models, and this approach can reduce the computation time. Finally, the timetable of the Beijing-Shanghai high-speed railway is considered as the actual case for analysis. Thus, the method was proven feasible for operation adjustment of delayed trains.

Технология оценивания качества процесса эксплуатации инструмента с упрочненной рабочей частью

The paper reports the technology allowing the assessment of the operation process of a cutter of which an operation part is hardened by the impact of low-temperature plasma with the combined category. A basis for the assessment makes a modeling of a tool operation process allowing the formation of a change path of its state through defect parameters formed on the hardened working part and a design circuit of its self-organization. On the basis of modeling results there is defined an index characterizing the time of tool steady operation. An experimental test of technology is carried out which has shown that it allows obtaining information on basic regularities and reasons of changes in the state of the hardened tool, carrying out the search of directions to increase its operational reliability and estimating the increase quantitatively.

A coloured Petri net framework for modelling aircraft fleet maintenance

The aircraft fleet maintenance organisation is responsible for keeping aircraft in a safe, efficient operating condition. Through optimising the use of maintenance resources and the implementation of maintenance activities, fleet maintenance management aims to maximise fleet performance by, for example, ensuring there is minimal deviation from the planned operational schedule, that the number of unexpected failures is minimised or that maintenance cost is kept at a minimum. To obtain overall fleet performance, the performance of individual aircraft must first be known. The calculation of aircraft performance requires an accurate model of the fleet operation and maintenance processes. This paper aims to introduce a framework that can be used to build aircraft fleet maintenance models. A variety of CPN (coloured Petri nets) models are established to represent fleet maintenance activities and maintenance management, as well as the factors that have a significant impact on fleet maintenance including fleet operation, aircraft failure logic and component failure processes. Such CPN models provide an ideal structured framework for Monte Carlo simulation analysis, within which calculations can be performed in order to determine numerous fleet reliability and maintenance performance measures.

Electromagnetic Interference Issue in Safety Systems Applied at Airports

Abstract The proper operation of electronic devices used in transport facilities is possible by protecting them against the effect of adverse electromagnetic fields. At present, all kinds of facilities, including critical infrastructure facilities, intended for functioning in peace conditions and emergency states, are equipped with power systems and numerous electronic devices, including electronic safety systems. On the basis of observing the process of their operation, it can be concluded that an artificially generated intended or unintended electromagnetic field, within various frequency ranges, may negatively affect the operation of electronic devices. It was found that the operation of the electronic safety systems applied at airports may be subject to interference as a result of the impact of adverse electromagnetic fields. Therefore, it is necessary to analyse the impact of electromagnetic interference on the operation of these systems. This article presents a developed author’s operation process model including electromagnetic interference within low frequencies. The reliability and operation analysis of the electronic safety systems carried out by the authors allows for numerical assessment of various types of solutions – both technical and organisational ones. As a result, they can be implemented, in order to minimise the impact of electromagnetic interference on the system functioning. This is a new approach to this issue, as there are currently designed and installed security systems at airports, but there is no analysis of the impact of electromagnetic interference on their functioning. In further research concerning this issue, the authors plan to further develop reliability-operational models, which will differentiate between the states of partial fitness. It will allow for more accurate mapping of the operation of the electronic safety systems which are applicable at airports.

Modeling of ATC Operation Process based on Extended Colored Petri Net

Modeling of ATC Operation Process based on Extended Colored Petri Net

Research and Analysis of Low-Carbon Manufacturing Operation Model in Life-Cycle Oriented Mechanical Manufacturing Enterprises

Mechanical manufacturing industry is an important part of China's national economy, it is the main source of material used in people's life, which provide large-scale production materials for the society. Based on the previous work experience, this paper introduces the framework model of low-carbon operation process in machinery manufacturing enterprises oriented to life-cycle, and discusses the construction process of multi-dimensional process model of low-carbon operation in mechanical manufacturing enterprises from four aspects, including target system framework, low-carbon operation strategy, life cycle process and support system.

To aggregate or to eliminate? Optimal model simplification for improved process performance prediction

Operational process models such as generalised stochastic Petri nets (GSPNs) are useful when answering performance questions about business processes (e.g. ‘how long will it take for a case to finish?’). Recently, methods for process mining have been developed to discover and enrich operational models based on a log of recorded executions of processes, which enables evidence-based process analysis. To avoid a bias due to infrequent execution paths, discovery algorithms strive for a balance between over-fitting and under-fitting regarding the originating log. However, state-of-the-art discovery algorithms address this balance solely for the control-flow dimension, neglecting the impact of their design choices in terms of performance measures. In this work, we thus offer a technique for controlled performance-driven model reduction of GSPNs, using structural simplification rules, namely foldings. We propose a set of foldings that aggregate or eliminate performance information. We further prove the soundness of these foldings in terms of stability preservation and provide bounds on the error that they introduce with respect to the original model. Furthermore, we show how to find an optimal sequence of simplification rules, such that their application yields a minimal model under a given error budget for performance estimation. We evaluate the approach with two real-world datasets from the healthcare and telecommunication domains, showing that model simplification indeed enables a controlled reduction of model size, while preserving performance metrics with respect to the original model. Moreover, we show that aggregation dominates elimination when abstracting performance models by preventing under-fitting due to information loss.

Numerical Simulation of the Process of a Technical Object State Changes

Abstract The article presents a construction method and an example of a model of a technical object operation process as well as the main stochastic assumption which is a mathematical model of an object state changes. The model of the operation process was built using an analysis of the state space and operation-related events of the analyzed technical objects. An example of numerical simulation of the technical object state change process as a tool to be used to support the analysis of the considered process. Numerical simulation of the stochastic process being a model of a technical object state change process makes it possible to determine the process characteristics impossible to determine in an analytical way.

Principles of process modeling of the heat supply systems operation

The problem of process modeling of heat supply systems operation with the appropriate of the special software is presented in the article. The purpose of the simulation is to identify the most likely and dangerous accidents, the quantitative and qualitative assessment of them, the frequency of their occurrence, the size of the damage, etc. The implementation of the solution presented in the work is already useful at present to improve the design and further operation of heat supply systems, and as a consequence also for consumers of thermal energy. The use of simulated modeling of heat supply system operation processes significantly reduces the strength calculation time, allows simulating various pipeline route configurations, performing their comparative analysis, and choosing optimal characteristics for the simulated system.

Method for initial assessment of unit costs of public city transport means operation

The study deals with the problems connected with modeling and simulation of technical objects operation processes carried out within a certain class of complex technical systems. The analyzed system is a city bus transport system. The study presents a method for assessment of unit costs involved in a technical object’s being in selected operational states. One of the subsets of data to be used for modeling the process of a technical object operational state changes, includes data concerning the costs borne by the system when the object is in the analyzed operational states. In order to determine this data, it is often necessary to modify the system of costs registration used in a given operation system. Since it is a very expensive and log process, a method of initial assessment of indispensable data has been proposed, on the basis of a costs registration method and simulation of the operation process. The study also includes basic assumptions of the operation process model, being an important element of the developed method. The assumptions of the operation model have been formulated on the basis of identification of a real operation system of city bus transport system and experimental tests carried out in system.

Analysis of the vehicle operation process including diagnostic information

Modern telecommunications techniques allow for continuous transmission of information from vehicles to dispatch centres during the operation process. The information included in this transmission may contain diagnostic data that make it possible to monitor the state of responsible components of the vehicle construction. The article presents the issues related to the analysis of the vehicle operation process including information received with the use of a CAN bus. The model of the vehicle operation process was presented, and the diagnosis state was taken into account. The use of transport telematics systems and intelligent transport systems in transport allow for the rolling stock profiling at the next stage. Owing to the rolling stock profiling, operational databases powered by a telematics interface are created. This, in turn, will allow to carry out the operational application process along with further optimisation of the operation process.

Review of car operation safety system elements

The paper includes a review of the following terms: anthropotechnical system, a layered model of an object operation process, safe car operation system structure. The current and predicted solutions in terms of car equipment impact on the safety of a driver-vehicle-road system were presented in detail.

Numerical Simulation of the Process of a Technical Object State Changes

Abstract The article presents a construction method and an example of a model of a technical object operation process as well as the main stochastic assumption which is a mathematical model of an object state changes. The model of the operation process was built using an analysis of the state space and operation-related events of the analyzed technical objects. An example of numerical simulation of the technical object state change process as a tool to be used to support the analysis of the considered process. Numerical simulation of the stochastic process being a model of a technical object state change process makes it possible to determine the process characteristics impossible to determine in an analytical way.

Method of Availability Control in the Transport System using Simulation Model of Operation and Maintenance Process

Abstract The paper presents the description of algorithm for calculation characteristics of simulation model for the operation and maintenance process of transport means. The model presented in the paper constitutes an integral element of the developed complex method of quality control in elaborate technical object performance systems. In the example presented in the paper, the evaluation criteria consist of the availability of technical object as well as unit profit generated in the states of the modeled operation and maintenance process. On the basis of the results of research carried out at an existing operation and maintenance system, entry data for the model were obtained and simulation experiments were carried out.