Object-oriented Model Research Articles

Многокритериальное управление антропогенными рисками опасности электроустановок

An approach to the construction of a decision support system (DSS) is considered, including object-oriented models and software tools using ontology – a model representing a computer form of a knowledge base (BZ) in the form of semantic (information-logical) networks. With the help of these networks, the interrelationships of components of a human-machine system with different physical nature (human, electrical installation, environment) are established. At the same time, ontologies perform an integral function, providing a general conceptual basis in decision-making processes in the subject area under consideration. Keywords: MAN-MACHINE SYSTEM, MAN-MADE FIRES, LEAKAGE CURRENTS IN ELECTRICAL INSTALLATIONS, THERMAL OVERLOAD

Acausal equation-based and object-oriented modeling of heating systems: The College Thermal library

With the growing demand for adequate thermal comfort and increasingly sophisticated and interconnected energy systems, software tools able to easily and effectively study complex thermal systems need to be developed. Here, a novel acausal equation-based and object-oriented modeling (OOM) approach is used to model the seasonal performance of a residential heating system taken as a case study. To this end, a purpose-built library named College Thermal was developed using Modelica language in the Wolfram System Modeler simulation environment. In detail, dynamic simulations under varying operating conditions were performed to assess the ability of the system to ensure the design conditions, and to estimate the resulting energy consumption during the heating season. Then, the effect of key parameters of the thermal components on the overall energy performance of the system is analyzed. The developed OOM library, which is characterized by interoperability, modularity, and scalability features and thus could easily incorporate extensions/evolutions of the studied system, would be prospectively suitable for optimizing system layouts and testing control strategies in various thermal engineering applications.

A disaster scene simulation system in 3D for oil transmission stations: Design and implementation

The disaster scene in three-dimensional (3D) plays a crucial role in disaster emergency management and risk communication of oil transmission stations. However, existing research for the disaster scene mainly focuses on reproducing the disaster environment and rarely predicts the damage state of the disaster-affected object. This paper proposes an object-oriented modeling method that utilizes a multilevel decomposition pattern for disaster scenes. This method combines earthquake vulnerability assessment with 3D visualization technology to predict and characterize the damage state of critical infrastructure in oil transmission stations. To enhance earthquake risk perception, a simulation system is designed and developed, which allows for the construction of virtual scenes and quick simulation of disaster scenes in 3D. The case application shows that the system improves the 3D modeling efficiency of disaster scenes and enhances public awareness of earthquake risks. The simulation system can provide technical support for seismic mitigation planning and emergency management decision-making at oil transmission stations and has good application prospects.

Parametric geological model update and probabilistic analysis of shield tunnel excavation: A borehole-based conditional random fields approach

Shield tunnel construction has faced considerable challenges due to the uncertain geological conditions in real scenarios. The borehole data obtained from geological investigations are often too limited to effectively evaluate uncertainties at nonsampled points. Moreover, the existing probabilistic safety assessment (PSA) frameworks that consider the uncertainties of soil properties have encountered limitations in engineering practice due to the complexity of conditional random field (CRF) theory and the operability of numerical modeling. Based on the digitization of the underground infrastructure, this study implements the object-oriented parametric modeling (PM) to address these limitations. A PM-CRF engine is first developed to automate the process of parametric geological modeling using CRFs. Then, a PM-CRF-PSA interoperability framework is proposed to automatically generate a PSA model for comprehensive safety assessment considering the uncertainties of soil properties. Finally, a case study is conducted with the proposed framework to assess the whole process of parametric modeling from CRF characterization to PSA. The results of this study highlight the clear advantages of this framework compared to traditional deterministic safety assessment (DSA) methods in terms of characterization of the uncertainty of soil properties and the efficiency of PSA modeling. Thus, the proposed framework enables the efficient and comprehensive exploration of shield tunnel design schemes by considering the uncertainties of soil properties.

MATHEMATICAL MODEL AND DYNAMICS OF A VARIABLE THROTTLE (CHOKE VALVE) FOR X-MAS TREES

One of the main elements of the subsea production system (SPS) is an adjustable throttle that regulates the supply of the medium (liquid) moved along the wellbore. The drive that controls the position of the shut-off-and-regulating element (SCE) of the throttle should provide increased requirements for reliability and dynamics, based on the requirements for the stability of the SCE, since the occurrence of self-oscillations can be the cause of the «start of disasters». Modern methods for the development and analysis of technical systems are based on the widespread use of mathematical models based on detailed knowledge of the processes and phenomena occurring in the systems under consideration. The use of a mathematical model is of great and urgent importance – it allows not to carry out expensive and costly physical experiments both in terms of time and money. The results obtained in the course of computer simulation can be used to optimize systems, determine operating modes and the causes of possible failures. The article presents the developed mathematical model of the adjustable choke of the X-mas tree. The mathematical model, unlike the existing ones, takes into account the non-stationary nature of the emerging hydrodynamic force on the SCE, as well as the nonlinearity of the hydraulic equipment – the actuator and control distributor. The paper presents the results of a numerical experiment and compares the proposed mathematical model with the results of a numerical experiment. The scientific novelty of the work lies in the creation of an object-oriented mathematical model of an adjustable choke of X-mas trees, taking into account the non-stationary load on the actuator, as well as the non-linearities of the control equipment.

Vulnerability detection in the network traffic flow of the RADIUS protocol based on the object-oriented model


 
 
 The RADIUS protocol was analyzed from the point of view of its functionality and security. The internal structure and the division into functions were shown. There were described the structure of the RADIUS network, the functions of the network access server or NAS, and the RADIUS server. The advantages of the centralized secure data processing technology based on the RADIUS protocol were shown. Mechanisms of secure processing of requests at the authentication and authorization stage were described. Sources and types of protocol vulnerabilities were studied and possible attack scenarios were identified. The relevance of creating models for evaluating the vulnerabilities of the RADIUS protocol was substantiated, and the methodology for building the model was chosen. An object-oriented model of the RADIUS protocol has been developed. A software application was developed and various attacks on the RADIUS protocol were tested. A number of potential vulnerabilities have been identified.
 
 

Design and Development of ER MineTracer: A Mobile Emergency Response Application for Mining Industry

Most of the industries, especially mining companies, are facing nowadays an exciting future with growing demand as well as severe challenges. Several innovations in technology as well as in the organizational process and methods are developed in order to cope with the continuously advancing technologically-driven society and to address pressing issues that industries are facing, including emergency response-related problems. This study aimed to improve information access by developing ER MineTracer mobile emergency response application which combines web and mobile applications designed for reporters and rescuers in responding to employees’ emergency requests. It uses GPS to determine an employee’s current position and communicates the user’s name and present location straight to a web application installed in a command center for quick dispatching of emergency units. Descriptive-developmental research was employed in the study utilizing an object-oriented modeling tool in designing the ER MineTracer mobile application. Thirty (30) participants were purposefully chosen to assess the performance of the system and it was revealed that the developed ER MineTracer mobile application was efficient in terms of accessibility, accuracy, and usability. Hence, it is recommended to utilize ER MineTracer and optimize smartphones to assist individuals in saving lives during emergencies and accidents, especially in mining industries.

Research on Intelligent System of Computer Aided Ideological and Political Course Teaching

This paper focuses on the design scheme of the auxiliary teaching system for ideological and political theory courses using J2EE architecture design. In this paper, the overall planning of the system's architecture, work flow, system function, data structure, etc. is carried out, and it is designed and implemented in detail. The system adopts B/S three-tier structure and uses JSP technology to design dynamic pages. Consider using JavaBean to encapsulate the key code of the program from the aspects of system security and code reusability. Use CASE tools and object-oriented modeling language in system design. Through UML modeling language, use VISIO, ROSE and other modeling tools to analyze and design the system to generate conceptual models and entities of the system. Through requirement analysis and detailed design, the user login module, network course module, online examination module, learning resource module and exchange forum module are finally realized. Finally, the thesis assists the realization of the functions of each module of the teaching system, and carries out corresponding tests and verifications, and the system is in the testing stage and plays a great role in practice.

Automated system for assessing the structure of a dairy cattle herd

The article describes a model of an information system for assessing and forming the structure of a dairy cattle herd. Based on a brief description of this task, a logical model of a relational database is built using predefined SQL data types. Based on object-oriented modeling, a system behavior model is developed, presented in the form of a UML diagram of use cases and sequence diagrams. The option of using this model in the form of a local information system and the possibility of its integration with existing software systems is considered. The correctness of the model is confirmed by the developed local information system of the aforementioned assessment of the herd structure.

Ubiquitous Hand-Held Device’s Sigma LFSR Driven Security Model

Mobile data security is crucial in modern communication, especially in financial transactions. This paper introduces a data security mechanism for the banking and financial sectors based on the AES algorithm. Hackers often exploit various techniques to intercept, alter, or steal information during these transactions. The primary objective of this work is to identify effective encryption methods to secure data from such attacks during financial transfers. By integrating the AES algorithm into an Object-Oriented Model, with SIGMA LFSR in the pipeline, the proposed system enhances message confidentiality and aims to improve trust in mobile-based online banking, particularly on client-side applications for handheld devices. With mobile phones becoming an integral part of daily life, security concerns surrounding the storage of sensitive credentials on these devices have increased. This research focuses on applying cryptographic techniques to bolster the security of mobile devices.

Разработка имитационной модели определения координат воздушных объектов по отраженному от воздушного объекта и принятому на антенну навигационного приемника навигационному сигналу ГНСС

This article is devoted to the development of a simulation model for determining the coordinates of air objects based on the GNSS navigation signal reflected from the air object and received on the antenna of the navigation receiver. To solve the problem of radar of aerial objects using bistatic location based on the use of GNSS satellites, it was necessary to pre-evaluate the energy or energy potential of the satellite navigation signal reflected from the aerial object, which then comes to the receiving antenna of the navigation equipment of consumers. The results obtained in the form of the developed computational schemes will form the basis of the algorithmic and software of the passive radar system and will allow determining the requirements for its technical support carried out within the framework of the grant project of the Ministry of Education and Science of the Republic of Kazakhstan No. AP09260581. In this paper, simulation modeling is understood as such an approach to modeling complex systems, which allows us to develop a single meta-model that combines into an integral set of models of objects and processes of their interaction based on a single information and event space in a single discrete time scale, and implement the resulting meta-model in an electronically equivalent form on an electronic computer. One of the main tasks of the study of complex radio engineering systems by modeling is the choice of modeling principles that should allow the construction of the simulated system in accordance with the goals and objectives of the study in such a way that the model adequately reflects the processes and patterns of behavior of the system under study with the necessary degree of reliability and detail. One of the most productive methods of developing a software and hardware complex of simulation modeling is object-oriented modeling.

Object-oriented modelling of advanced computer cooling solutions

Modern computing systems are so energy-intensive to make efficient cooling vital for their operation. This is giving rise to a variety of innovative cooling solutions based on a mix of traditional and new techniques. The design and engineering of these solutions, as well as of the necessarily involved controls, requires dynamic simulation. Cooling simulation models must be capable of representing multi-physics cyber-physical systems, of connecting to specialised 3D chip simulators when high detail is needed, and at the same time of scaling up to the data centre – tailoring the detail level accordingly – when system-level studies need carrying out. In such a challenging scenario, an enabling technology is Object-Oriented Modelling (OOM). Along this approach we here present a Modelica library to serve the purposes just outlined, and that we are releasing as free software for the scientific and engineering community.

Estimation Model for Enhanced Predictive Object Point Metric in OO Software Size Estimation Using Deep Learning

The Software industry’s rapid growth contributes to the need for new technologies. PRICE software system uses Predictive Object Point (POP) as a size measure to estimate Effort and cost. A refined POP metric value for object-oriented software written in Java can be calculated using the Automated POP Analysis tool. This research used 25 open-source Java projects. The refined POP metric improves the drawbacks of the PRICE system and gives a more accurate size measure of software. This paper uses refined POP metrics with curve-fitting neural networks and multi-layer perceptron neural network-based deep learning to estimate the software development effort. Results show that this approach gives an effort estimate closer to the actual Effort obtained through Constructive Cost Estimation Model (COCOMO) estimation models and thus validates refined POP as a better size measure of object-oriented software than POP. Therefore we consider the MLP approach to help construct the metric for the scale of the Object-Oriented (OO) model system.

Software Engineering Classification Model and Algorithm Based on Big Data Technology

With the development of internet technology, cloud computing is becoming increasingly popular, and it has a wide range of applications in various fields, such as mobile payments and the Internet of Things. The big data model is a very important and valuable set of useful and unique information. This article mainly introduces the establishment of an object-oriented architecture-based machine learning system classification model using big data analysis methods, as well as the use of neural network algorithms to construct machine learning system classification patterns. Through examples, a comparative experiment is conducted to verify the effectiveness of traditional manual annotation modeling methods combined with parallel processing. Its experimental results show that the model has high accuracy, with an accuracy rate above 92% and a recall rate above 94%, and its F1 value is infinitely close to 1, indicating that the average accuracy and precision of the model is very high.

АВТОМАТИЗОВАНЕ КЕРУВАННЯ СИСТЕМОЮ ТЕПЛОПОСТАЧАННЯ ЗІ ЗМІННОЮ СТРУКТУРОЮ ПО ЗНАЧЕННЯМ ЦІЛЬОВОЇ ФУНКЦІЇ ОПТИМІЗАЦІЙНОЇ ЗАДАЧІ

Abstract. Object-oriented models of the object and the control system, based on data ware and software improvement, for elements of the computer-integrated control system designed for a heat supply system, have been worked out. Also, a complex criterion of optimal control of the heat supply system structure on the basis of engineering-and-economic performance, as well as control algorithms defining the optimal structure of the system and using genetic algorithms, have been proposed. Research of the control efficiency using a simulation model of the heat supply system has been carried out. Keywords: computer-integrated control system, structure variation control, optimal control criterion, object-oriented analysis, engineering-and-economic performance, genetic algorithm.

Object-Oriented Modeling of the Variation of Acceleration and Deceleration Characteristics in Relation to Speed Bands for Railway Vehicles

Object-Oriented Modeling of the Variation of Acceleration and Deceleration Characteristics in Relation to Speed Bands for Railway Vehicles

Модель архитектуры приложения, реализующего схему электронного тайного голосования he-SU

The article offers a description of an objectoriented model of an application that implements an electronic secret voting scheme based on the He-Su scheme. To implement the scheme, you need to choose three basic cryptographic schemes: hashing, a symmetric cryptosystem and an asymmetric cryptosystem with the ability to blindly sign. Based on the analysis of the constructed model, an architecture based on abstractions is proposed, which makes it possible to easily select and replace some basic cryptographic systems with others used in the scheme.

The development of the application for support the intellectual analysis of texts of the humanities and socio-economic cycle

The article is devoted to the consideration of the problems of didactic design of teaching materials by a teacher of disciplines of the humanities and socio-economic cycle associated with the study of a significant amount of information from various sources, the need to select a number of literary sources taking into account their specifics for different educational tasks and types of educational activities, as well as ranking the most important didactic units for the formation of working programs of disciplines. The possibilities of using automation tools for the analysis of text materials are revealed, which will allow a teacher engaged in the didactic design of a particular discipline to conduct a syntactic analysis of methodological materials, significantly reduce the complexity of this process when developing, making changes and adapting courses of social and humanitarian orientation. As a result of the analysis of the subject area, the authors determined a list of functional requirements, based on which the results of the physical and logical design of the system were presented, including a database model, system architecture, as well as a deployment diagram using an object-oriented modeling language.

Innovative cloud computing object-oriented model to unify heterogeneous data

Innovative cloud computing object-oriented model to unify heterogeneous data

THE PROCESS OF DESIGNING THE INFORMATION-ANALYTICAL MODEL OF UNIVERSITY MANAGEMENT IN THE ENTREPRENEURSHIP EDUCATION SYSTEM

The creation and implementation concept regarding the information-analytical system of university management is based on the idea of efficient and scientifically grounded usage of modern pedagogical and information-communication technologies. Structurally, the concept consists of three components: organizational, pedagogical and technological. Model of information-analytical system of entrepreneurship education & university management is built with the usage of modular architecture, which provides standardized realization of its particular parts (modules). This makes it possible to develop several independent modules simultaneously by different developers. It is revealed that the implementation of information system modules, which is based on the complex usage of different modeling technologies and takes into account the complex relationships between all educational process subjects, in particular, characterized by the integrated use of object-oriented modeling of complex systems and imitation systems modeling technologies is an effective tool for research and development of new technologies for managing the university's educational process.