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Port-Hamiltonian Modeling of Thermofluid systems and object-oriented implementation With Modelica I: Thermodynamic Part

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IEEE ACCESS 2021年 9卷 131496-131519页

作者： Marquez, Francisco M. Zufiria, Pedro J. Yebra, Luis J. Univ Alcala UAH Dept Automat Alcala De Henares 28801 Spain Univ Politecn Madrid UPM Informat Proc & Telecommun Ctr Dept Matemat Aplicada Tecnol Informac & Comunicac ETSI Telecomunicac Madrid 28040 Spain CIEMAT Plataforma Solar Almeria Tabernas 04200 Spain

In this paper, we present the physical foundations and the development of the thermodynamic part of a Modelica library with the fundamental components for modeling thermofluid systems. We have chosen Modelica because it is an object-oriented modeling language that allows an elegant design of the library, with a top-down conception that starts from very general components where we model the thermodynamic properties common to all simple substances and descend by inheritance to model the properties of each particular substance. To model the behavior of each component, we have used: classical thermodynamics to define the equilibrium states, the local equilibrium hypothesis of Classical Irreversible Thermodynamics to model the changes of state, and the port-Hamiltonian approach to obtain the equations of the system dynamics. With this formulation, we implement the thermodynamic behavior of ideal gases (including monatomic gases as a particular case), the 2073 substances defined for the CEA (Chemical Equilibrium with Applications) NASA Glenn computer program, the IAPWS Formulation 1995 for the Thermodynamic Properties of Water Substance for General and Scientific use, and the Syltherm 800 HTF (Heat Transfer Fluid). We also define graphical symbols for each library component that facilitate modeling complex systems with simple drag-and-drop manipulations, component connection, and parameter selection. These symbols are a slightly modified version of those used in bond graphs to facilitate their reading and the representation of the structure of complex systems. We also show the modeling, simulation, and comparison for accuracy, performance, and scalability of some thermodynamic systems implemented with the Modelica Standard Library (MSL) and the proposed library.

关键词： object oriented modeling Mathematical models Thermodynamics Computational modeling Libraries Entropy Solid modeling Bond graphs Modelica language object oriented modeling port-Hamiltonian systems thermodynamic systems thermofluid systems

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design and implementation of Model-Driven Development for Nursing Information System 18

Design and Implementation of Model-Driven Development for Nu...

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18th World Congress on Medical and Health Informatics: One World, One Health - Global Partnership for Digital Innovation, MEDINFO 2021

作者： Wen, Pei-Ying Chang, Shien-Young Institute of Medical Sciences Tzu Chi University Hualien Taiwan

ISBN: (纸本)9781643682648

Current healthcare industries are more focusing on quality, efficiency, and safety. Nursing information systems are among the key components of healthcare information systems;they can help nurses to use data more effectively while managing their nursing activities, allowing them to improve patient care and develop their knowledge. According to clinical various needs and various hospitals, so as to develop a flexible Nursing Information System, this study based on the MVC, object-oriented Programming is used to develop the web interface, and web service is used to exchange data with HIS. This design and implements a flexible Nursing Information System which is applied and summarized clinically on the function of acquiring clinical data from the different clinical requirements and showing the web pages and different kinds of forms from the device browser. Under the software development environment of high variability, high complexity, and high customization in the medical industry, a scalable and maintainable nursing information system is realized through the MVC architecture and the Master-Detail data table design, which can meet the needs of different organizations. © 2022 International Medical Informatics Association (IMIA) and IOS Press.

关键词： object oriented programming

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Board 329: Investigating the Impact of Context Choice on Learning Experience via Immersive Simulations in an object-oriented Programming Course

Board 329: Investigating the Impact of Context Choice on Lea...

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2023 ASEE Annual Conference and Exposition - The Harbor of Engineering: Education for 130 Years, ASEE 2023

作者： Ozden, Sabahattin Gokhan Negahban, Ashkan Ashour, Omar Knight, Daniel Pennsylvania State University Abington United States Pennsylvania State University Great Valley United States Pennsylvania State University Behrend United States University of Colorado Boulder United States

Researchers have looked into ways to make computer science assignments more engaging, practical, and beneficial to students to improve learning outcomes by increasing student appeal. Offering a pool of assignments and allowing students to choose their preferred assignments is considered as a potential method for improving learning outcomes. In this paper, we investigate the effect of context choice for assignments in an object-oriented programming course that covers various topics such as object-oriented programming concepts, database design and implementation, graphical user interface design, and web application development. Students complete three immersive simulation-based learning (ISBL) modules as course assignments. ISBL modules involve technology-enhanced problem-based learning where the problem context is represented via a three-dimensional (3D), animated discrete-event simulation model that resembles a real-world system or context, in this case, we have three simulated systems/contexts around which ISBL assignments are defined: an airport, a manufacturing system, and a hospital emergency department. The research experiments involve four groups: (1) students with no choice who use the same assigned simulated system for all three ISBL assignments;(2) students with no choice who are given a different simulated system for each ISBL assignment;(3) students who can choose their preferred simulated system at the beginning but cannot change their choice for future assignments;and, (4) students who can choose at the beginning and switch between the three simulated systems for subsequent assignments. Data are collected over multiple semesters and statistical analyses are conducted to compare the four groups in terms of motivation, experiential learning, and self-assessment of learning. We also conduct qualitative assessments in the form of interviews to support and explain our statistical results. © American Society for Engineering Education, 2023.

关键词： Students

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Visualization of object-oriented software in a city metaphor: Comprehending the implemented variability and its technical debt

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JOURNAL OF systems AND SOFTWARE 2024年 208卷

作者： Mortara, Johann Collet, Philippe Dery-Pinna, Anne -Marie Univ Cote Azur CNRS I3S Nice France

While many large-scale software systems intensively implement variability to reuse software and speed up development, they often do not document it, hampering its comprehension. This is especially the case for variability -rich object -oriented (OO) systems that heavily rely on existing OO mechanisms (i.e. , inheritance, overloading and some patterns) to implement it in a single codebase. With no traceability information, the variability is buried in the codebase, hampering its identification, analysis, and understanding. While variability management becomes increasingly difficult over the system evolution, the implementation mechanisms also bring additional complexity to the codebase, which eventually leads to technical debt, threatening even more the software quality. In this article, we report on the design and evaluation of an extensible visualization, VariCity , that exhibits zones of high density of OO variability implementations. It relies on the city metaphor to represent the classes of the system as buildings whose dimensions are used to show variability metrics inherent to the implementation classes. They are linked together through streets depicting usage relationships and grouping in neighborhoods classes using each other. The extensibility of VariCity is demonstrated with VariMetrics , which highlights OO quality metrics on the buildings, revealing quality -critical classes concentrating variability implementations. We evaluate the visualization capacity to reveal zones concentrating variability implementations and being quality -critical by applying it to multiple variability -intensive open source software systems. We also report on a controlled experiment comparing the gain brought by the visualization to the use of an IDE.

关键词： Software variability Reverse-engineering Software visualization Software cities Program comprehension Software quality

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A novel model object oriented approach to the software design 8th

A novel model object oriented approach to the software desig...

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8th International Conference on Frontiers of Intelligent Computing: Theory and Applications, FICTA 2020

作者： Yadav, Rahul Singh, Vikrant Prabhu, J. School of Information Technology and Engineering Vellore Institute of Technology VelloreTamil Nadu632014 India

ISBN: (纸本)9789811556784

This paper discusses the problems concerning several object-oriented approach developed by researchers, academies, designers and developers which has led to the use of various object-oriented methods for the software system development. The technique and approach used in various object-oriented designs lack in process model and do not include mechanisms necessary for user requirements, specifications, understanding ability and better identification with end user during software development process. These aspects are very important in software system design, where the user interaction with software is very high and significant. The software systems developed as per the user’s requirements without proper approach lead to unsustainable, robust and of no use to the end user. Therefore, it is important for the designers and developers to make proper design model and then start the implementation process. This paper explains the existing object-oriented models and the problems faced by designers in design and implementation process and it also proposes a new technique. The proposed technique will provide a better object-oriented approach to different level of designers in software design. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2021.

关键词： Software design

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A cost-effective adaptive random testing algorithm for object-oriented software testing

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JOURNAL OF INTELLIGENT & FUZZY systems 2021年第3期41卷 4415-4423页

作者： Zhou, Yue Wang, Xiujun Guo, Shu Wen, Yi He, Jingsha Zhongguancun Software Pk Natl Applicat Software Testing Labs Beijing Peoples R China Zhongguancun Software Pk Beijing Software Testing & Qa Ctr Beijing Peoples R China Zhongguancun Software Pk Beijing Key Lab Software Testing Technol Beijing Peoples R China Beijing Univ Technol Fac Informat Technol Beijing Peoples R China

The rapid development of object oriented programming (OOP) technology has made it one of the mainstream programming technologies that has been widely used in the design and development of object oriented software (OOS). The inheritance, encapsulation and polymorphism properties of object-oriented language can improve the reusability, scalability and interoperability of software while increasing the difficulty of testing OOS. Researchers have proposed a variety of testing methods to test OOS among which random testing (RT) has been widely used due to its simplicity and ease of use. An OMISS-ARTsum algorithm is proposed in this paper that uses improved OMISS random test FSCS-ART with max-sum standard, which is an implementation version of fixed-sized-candidate-set ART. The OMISS-ARTsum algorithm calculates the total distance between a candidate test case and the executed test case set before the next test case is selected from the set of candidate test cases. Unlike the traditional max-sum based FSCS-ART algorithm, OMIS S-ARTsum does not calculate the distance between each executed test case and the candidate case and then sum up the total distance, but uses the method of summing up all the executed test cases and the candidate cases. The information of executing test cases is saved as a whole and the distance between the executed test case set and candidate cases is calculated at the same time. Experiment shows that compared to the OMISS-ART algorithm, the proposed OMISS-ARTsum algorithm can reduce the time overhead.

关键词： object oriented software adaptive random testing test input time cost

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pyFOOMB: Python framework for object oriented modeling of bioprocesses

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ENGINEERING IN LIFE SCIENCES 2021年第3-4期21卷 242-257页

作者： Hemmerich, Johannes Tenhaef, Niklas Wiechert, Wolfgang Noack, Stephan Forschungszentrum Julich Inst Bio & Geosci IBG 1 Biotechnol D-52425 Julich Germany Rhein Westfal TH Aachen Computat Syst Biotechnol AVT CSB Aachen Germany Forschungszentrum Julich Bioecon Sci Ctr BioSC Julich Germany

Quantitative characterization of biotechnological production processes requires the determination of different key performance indicators (KPIs) such as titer, rate and yield. Classically, these KPIs can be derived by combining black-box bioprocess modeling with non-linear regression for model parameter estimation. The presented pyFOOMB package enables a guided and flexible implementation of bioprocess models in the form of ordinary differential equation systems (ODEs). By building on Python as powerful and multi-purpose programing language, ODEs can be formulated in an object-oriented manner, which facilitates their modular design, reusability, and extensibility. Once the model is implemented, seamless integration and analysis of the experimental data is supported by various Python packages that are already available. In particular, for the iterative workflow of experimental data generation and subsequent model parameter estimation we employed the concept of replicate model instances, which are linked by common sets of parameters with global or local properties. For the description of multi-stage processes, discontinuities in the right-hand sides of the differential equations are supported via event handling using the freely available assimulo package. Optimization problems can be solved by making use of a parallelized version of the generalized island approach provided by the pygmo package. Furthermore, pyFOOMB in combination with Jupyter notebooks also supports education in bioprocess engineering and the applied learning of Python as scientific programing language. Finally, the applicability and strengths of pyFOOMB will be demonstrated by a comprehensive collection of notebook examples.

关键词： bioprocess modeling object oriented modeling ODEs Python

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OGRePy: An object-oriented General Relativity Package for Python

arXiv

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arXiv 2024年

作者： Shoshany, Barak Department of Physics Brock University 1812 Sir Isaac Brock Way St. CatharinesONL2S 3A1 Canada

We present OGRePy, the official Python port of the popular Mathematica tensor calculus package OGRe (object-oriented General Relativity) - a powerful, yet user-friendly, tool for advanced tensor calculations in mathematics and physics, especially suitable for general relativity. The Python port uses the same robust and performance-oriented algorithms as the original package, and retains its core design principles. However, its truly object-oriented interface, enabled by Python, is more intuitive and flexible than the original Mathematica implementation. It utilizes SymPy for symbolic computations and Jupyter as a notebook interface. OGRePy allows calculating arbitrary tensor formulas using any combination of addition, multiplication by scalar, trace, contraction, partial derivative, covariant derivative, and permutation of indices. Transformations of the tensor components between different index configurations and/or coordinate systems are performed seamlessly behind the scenes as needed, eliminating user error due to combining incompatible representations, and guaranteeing consistent results. In addition, the package provides facilities for easily calculating various curvature tensors and geodesic equations in multiple representations. This paper presents the main features of the package in great detail, including many examples of its use in the context of general relativity research. © 2024, CC BY.

关键词： Tensors

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Software and Algorithmic Aspects of Automating Finite-element Discretization 16

Software and Algorithmic Aspects of Automating Finite-elemen...

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IEEE 16th International Conference on the Experience of designing and Application of CAD systems (CADSM)

作者： Sokolovskyy, Yaroslav Nechepurenko, Andriy Herasymchuk, Olha Mokrytska, Olha Samotii, Tetiana Ukrainian Natl Forestry Univ Dept Informat Technol Lvov Ukraine SoftServe Ivano Frankivsk Ivano Frankivsk Ukraine

ISBN: (纸本)9781665438940

A software package has been developed for automating finite-element discretization of two-dimensional and three-dimensional areas in the C # programming language in the Microsoft Visual Studio environment (.NET Framework). Within the framework of the object-oriented approach, the information model of the system is presented in the form of designed graphical UML diagrams of use cases, classes and relationships between them. The created graphical user interface allows you to set the discretization parameters for two-dimensional and three-dimensional areas and control changes in the geometric dimensions of the discretes for the purpose of grid condensation in the specified areas of the region. The developed classes reflect the essence of object-oriented implementation of iterative methods of triangulation based on the Delaunay criterion. This makes it possible to integrate the developed software into existing CAE / CAD / CAM systems in order to expand their functionality.

关键词： triangulation Delaunay criterion iterative method finite element method object-oriented design

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designing a pattern language to enhance model composability and reusability: An example with component-based probabilistic models

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ENVIRONMENTAL MODELLING & SOFTWARE 2023年第1期169卷

作者： Aly, Ebrahim Elsawah, Sondoss Turan, Hasan H. Ryan, Michael J. Univ New South Wales Sch Syst & Comp Canberra Australia Univ New South Wales Capabil Syst Ctr Canberra Australia Capabil Associates Pty Ltd Canberra Australia

This paper presents a pattern language for developing object-oriented Bayesian Networks (OOBN), as a member of the component-based probabilistic models family, to tackle complex problems. The proposed pattern language integrates knowledge from various domains, such as modeling, software engineering, and Bayesian networks, to provide a comprehensive solution for developing OOBNs. The paper also provides a validation framework to evaluate the pattern language. As a practical application for the OOBN pattern language, a case study of using it to develop an OOBN is presented. The model in the case study aims to represent the complex interconnections among the Sustainable Development Goals (SDG), long-term sustainability and resilience. The results of the case study validate the effectiveness of the pattern language and highlight its potential for future applications. The proposed OOBN pattern language provides a systematic approach to the development of OOBN, reducing the complexity and increasing the efficiency of their modeling process

关键词： design patterns object-oriented Bayesian networks Complex systems Sustainable Development Goals (SDG) Resilience

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