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object-oriented methodology for intersection simulation model under heterogeneous traffic conditions

ADVANCES IN ENGINEERING SOFTWARE 2009年第10期40卷 1000-1010页

作者： Gowri, Asaithambi Venkatesan, Kanagaraj Sivanandan, Ramaswamy Indian Inst Technol Dept Civil Engn Transportat Engn Div Madras 600036 Tamil Nadu India

In developing countries like India, the traffic on roads is highly heterogeneous in nature, with vehicles of widely varying static and dynamic characteristics. In this type of traffic, vehicles do not follow lane discipline and they move freely over the entire width of roadway based on availability of space, To study this type of complex traffic flow and associated vehicular interactions, simulation is considered as an effective tool. An object-oriented methodology (OOM) for heterogeneous traffic simulation is proposed in this paper with focus on mid-block and intersection flow modeling. The paper presents the basics and advanced features of object-oriented programming (OOP) in detail in the context of traffic flow. The sample C++ code is discussed in detail to demonstrate the implementation of OOP features, such as encapsulation, inheritance and polymorphism. The contribution of this research work is the development of software objects for various components such as vehicle, traffic, link and node. This software can be adopted for heterogeneous traffic simulation programs, in general. (C) 2009 Elsevier Ltd. All rights reserved.

关键词： Heterogeneous traffic Mid-blocks Intersections Traffic simulation object-oriented programming

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Habitation: A Domain-Specific Language for Home Automation

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IEEE SOFTWARE 2009年第4期26卷 30-38页

作者： Jimenez, Manuel Rosique, Francisca Sanchez, Pedro Alvarez, Barbara Iborra, Andres Tech Univ Cartagena Dept Elect Technol Cartagena Spain

The appearance of model-driven engineering (MDE) has invigorated research on domain-specific languages (DSLs) and automatic code generation. MDE uses models to build software, thereby displacing source code as the development process\'s main feature. DSLs provide easy, intuitive descriptions of the system using graphic models. In this new context, DSLs facilitate work in the first design stages. In addition, MDE helps reduce DSL development costs. It therefore represents a synergistic union that can significantly improve software development.

关键词： computer graphics home automation object-oriented programming program compilers specification languages Habitation-domain-specific language automatic code generation graphic model model-driven engineering software development source code domain-specific languages visual languages Software design compilers Model driven engineering Graphical models object oriented programming visual languages COMPUTER GRAPHICS home automation Source code computer software specification description language Code generation

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Formal modelling of a sheet metal smart manufacturing system by using Petri nets and first-order predicate logic

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JOURNAL OF INTELLIGENT MANUFACTURING 2021年第4期32卷 1043-1063页

作者： Lu, Juan Ou, Chengyi Liao, Chen Zhang, Zhenkun Chen, Kai Liao, Xiaoping Guangxi Univ Guangxi Key Lab Mfg Syst & Adv Mfg Technol Nanning 530004 Peoples R China Beibu Gulf Univ Dept Mech & Marine Engn Qinzhou 535011 Peoples R China Guangxi Univ Dept Mech Engn Nanning 530004 Peoples R China Guangxi Automobile Grp Co Ltd Liuzhou Peoples R China Shenzhen Cyberspace Lab Pengcheng Lab Shenzhen 518055 Peoples R China

This study introduces a developed method to a smart computer-aided design/manufacturing (CAD/CAM) system, where layout design, process planning, and comprehensive computerized numerical control (CNC) code generation can be implemented to satisfy laser cutting holes, tapping, irregular and complicated profile processing, engraving, and burr back-scraping. The smart CAD/CAM(SCAM) system is developed as a commercial software product or application and firstly applied to flexible sheet metal machining center (BGL 130R). In this study, a formal modeling method involving Petri nets and first-order predicate logic is proposed to develop the smart manufacturing system. High-level Petri nets are employed to achieve the formal application architecture design of data flow for various functions, and the first-order logic used to represent the process plan is defined and deduced according to the machining methods. The developed system possesses the following characteristics: (1) a sound and complete deductive system to implement various types of trajectory planning, automatic generation, and validation of the CNC code;(2) a convenient design input environment and readiness for re-design and modification by adding specific design functions and using standard design procedures on a widely used CAD/CAM package;(3) helpful for designers in sheet metal layout designing, layout interference detection, process planning validation, preprocess manufacturing operation of CNC code generation, and autodefinition of storable file names;and (4) formal and simple in human-computer interaction, automatic and intelligent in process operations, and satisfactory in terms of the requirements of the flexible sheet metal machining center (BGL 130R).

关键词： Smart CAD CAM High-level petri nets object-oriented programming First-order predicate logic Process planning Layout design

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A methodology for the efficient computer representation of dynamic power systems: Application to wind parks

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WIND ENERGY 2013年第1期16卷 109-121页

作者： Pena, Rafael Medina, Aurelio Anaya-Lara, Olimpo Univ Michoacana Div Estudios Posgrad Fac Ingn Elect Morelia 58030 Michoacan Mexico Univ Strathclyde Inst Energy & Environm Glasgow G1 1XW Lanark Scotland

This contribution presents a methodology to efficiently obtain the numerical and computer solution of dynamic power systems with high penetration of wind turbines. Due to the excessive computational load required to solve the abc models that represent the behavior of the wind turbines, a parallel processing scheme is proposed to enhance the solution of the overall system. Case studies are presented which demonstrate the effectiveness and applications of the proposed methodology. Copyright (C) 2012 John Wiley & Sons, Ltd.

关键词： computer simulation object-oriented programming parallel programming numerical differentiation wind energy

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object-oriented virtual sample library: a container of multi-dimensional data for acquisition, visualization and sharing

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MEASUREMENT SCIENCE AND TECHNOLOGY 2005年第1期16卷 285-291页

作者： Todoroki, S Natl Inst Mat Sci Adv Mat Lab Tsukuba Ibaraki 3050044 Japan

Combinatorial methods bring about enormous data not only in size but also in dimension. To handle multi-dimensional data easily, the concept of a virtual container for combinatorially acquired data is demonstrated which is called 'virtual sample library' (VSL). VSL stores the data hierarchically in the order of (1) coordinates in the sample library, (2) names of the measurements performed and (3) data obtained from each measurement. Thus, the stored data are accessed intuitively just by tracing this tree-like structure and are provided for Visualization and sharing with others. This framework is constructed with the aid of an object-oriented scripting language which is good at abstracting complicated data structure. In this paper, after summarizing the problems of handling data acquired from combinatorially integrated samples and the availability of software tools to solve them, the concept of VSL is proposed and its structure and functions are demonstrated on the basis of one set of specific experimental data. Its extensibility as a platform for numerical simulation is also discussed.

关键词： combinatorial research data management object-oriented programming scripting language

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object oriented microwave circuit simulation

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INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING 2000年第3期10卷 164-182页

作者： Christoffersen, CE Mughal, UA Steer, MB N Carolina State Univ Dept Elect & Comp Engn Raleigh NC 27695 USA Intel Corp PTD Portland OR 97124 USA Univ Leeds Sch Elect & Elect Engn Inst Microwaves & Photon Leeds LS2 9JT W Yorkshire England

An object-oriented microwave circuit simulation environment is described. The design of the program is intended to offer flexibility,without sacrificing efficiency. Recent developments in object-oriented techniques and in C++ compilers are used to obtain a flexible and robust system ideally suited to the development of a global modeling strategy for the integration of circuit, field, thermal, and mechanical analyses. The simulation of spatial power combining systems is used as a vehicle to illustrate the architectural developments of the system. (C) 2000 John Wiley & Sons, Inc.

关键词： circuit simulation microwave CAE object-oriented programming circuit field interaction global modeling

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On efficiency and optimization of C++ programs

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SOFTWARE-PRACTICE & EXPERIENCE 1996年第4期26卷 453-465页

作者： Wu, PC Wang, FJ Department of Computer Science and Information Engineering National Chiao Tung University 1001 Ta-Hsueh Road Hsinchu Taiwan(email {pcwu fjwang}@csie.nctu.edu.tw) Department of Computer Science and Information Engineering National Chiao Tung University 1001 Ta-Hsueh Road Hsinchu Taiwan(email {pcwu fjwang}@csie.nctu.edu.tw)

The efficiency of object-oriented programs has become a point of great interest, One necessary factor for program efficiency is the optimization techniques involved. This paper presents the performance of several variations of a given C++ program and compares them with a version that uses no object-oriented features, Our result indicates that some object-oriented features in C++ are not well optimized in current C++ compilers. We thus discuss some code optimization techniques that can improve the efficiency based on the given C++ program.

关键词： object-oriented programming code optimization C++ efficiency C++ compiler optimizations

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A METHODOLOGY FOR DERIVING AN object-oriented DESIGN FROM FUNCTIONAL SPECIFICATIONS

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SOFTWARE ENGINEERING JOURNAL 1992年第4期7卷 247-263页

作者： ALAGAR, VS PERIYASAMY, K CONCORDIA UNIV DEPT COMP SCIMONTREAL H3G 1M8QUEBECCANADA UNIV MANITOBA DEPT COMP SCIWINNIPEG R3T 2N2MANITOBACANADA

A recent paradigm in software engineering is object-oriented software development. However, object-oriented methods still remain ad hoc, and the process of deriving an object-oriented design from the early analysis has not yet been formalised. In this paper, we advocate deriving a formal specification from informal requirements, conducting static analysis on the formal functional specifications to reason about the intended behaviour of the system, and then transforming the flat specification to an object-oriented design. The transformations discussed in this paper can be formalised and can be applied to any model-oriented specification to get a corresponding object-oriented design. The methodology is illustrated for a simple library management system using the model-oriented specification technique VDM.

关键词： object-oriented design software engineering formal specification model-oriented specification Software engineering techniques software development object-oriented programming functional specifications Library automation VDM library management system static analysis library automation object-oriented programming informal requirements

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Fractals, fuzzy logic and expert systems to assist in the construction of musical pieces

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EXPERT SYSTEMS WITH APPLICATIONS 2012年第15期39卷 11911-11923页

作者： Lopez-Ortega, Omar Ioana Lopez-Popa, Shani Univ Autonoma Estado Hidalgo Area Acad Sistemas Comp Mexico City 42084 DF Mexico Acad Mus Gandara Mexico City 42090 DF Mexico

The authors present a suite to assist in the creation of musical pieces, whose foundation lies on fractals, fuzzy logic and expert systems. Even though algorithmic music has been explored, some gaps still exist. The favored approach has consisted in mapping numbers to notes to create appealing pieces. This, we contend, is a necessary but not a sufficient condition. Our suite, besides the necessary mapping, possesses the following advantages. First, it is possible to define notes, tempos, and notes durations. Notes evolve according to the selected fractal. Tempos and durations can remain fixed or they also can follow a fractal. Second, it is possible to translate the resultant fractal notes into notes belonging to a musical scale. This is done by firing appropriate rules in a rule base. Third, interpretation templates are provided. Also, melodies or harmonies are available. The suite currently contains several known fractal systems, and we also proposed one dynamical, recursive computation based on Mamdani fuzzy rule bases. The suite we present helps promoting and monitoring the creative process of composing musical scores. The actual implementation of the suite was done on the Java language. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： Artificial creativity Fractal systems Fuzzy rule bases object-oriented programming Algorithmic music Computer-assisted creativity Expert systems

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Structural Complexity and Programmer Team Strategy: An Experimental Test

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 2012年第5期38卷 1054-1068页

作者： Ramasubbu, Narayan Kemerer, Chris F. Hong, Jeff Univ Pittsburgh Joseph M Katz Grad Sch Business Pittsburgh PA 15260 USA King Abdulaziz Univ Jeddah Saudi Arabia Singapore Management Univ Sch Informat Syst Singapore 178902 Singapore

This study develops and empirically tests the idea that the impact of structural complexity on perfective maintenance of object-oriented software is significantly determined by the team strategy of programmers (independent or collaborative). We analyzed two key dimensions of software structure, coupling and cohesion, with respect to the maintenance effort and the perceived ease-of-maintenance by pairs of programmers. Hypotheses based on the distributed cognition and task interdependence theoretical frameworks were tested using data collected from a controlled lab experiment employing professional programmers. The results show a significant interaction effect between coupling, cohesion, and programmer team strategy on both maintenance effort and perceived ease-of-maintenance. Highly cohesive and low-coupled programs required lower maintenance effort and were perceived to be easier to maintain than the low-cohesive programs and high-coupled programs. Further, our results would predict that managers who strategically allocate maintenance tasks to either independent or collaborative programming teams depending on the structural complexity of software could lower their team's maintenance effort by as much as 70 percent over managers who use simple uniform resource allocation policies. These results highlight the importance of achieving congruence between team strategies employed by collaborating programmers and the structural complexity of software.

关键词： object-oriented programming complexity measures software quality software productivity programming teams maintenance process CK metrics software management

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