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Requirements analysis and UML - Interaction diagrams and state transition diagrams (Reprinted from Developing Web Information Systems, 2003)

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COMPUTING & CONTROL ENGINEERING JOURNAL 2003年第3期14卷 7-11页

作者： Vidgen, R Univ Bath Sch Management Bath BA2 7AY Avon England

UML provides a powerful framework and notation for modelling business processes and objects. In part 1 of this article four arguments for conceptual modelling were advanced: to clarify our thinking about an area of concern; as an illustration of a concept; as an aid to defining structure and logic; and, as a prerequisite to design. The unified modelling language (UML) is a widely accepted object-oriented notation for modelling and specifying system requirements. In part 1, the UML use case diagram and class diagram were introduced and applied to the fictional Barchester Playhouse, an organisation investigating the implementation of an Internet theatre ticket booking system. Use cases represent the system from a functional, user-centred perspective, while the class diagram exposes the structure of the system. In this article, the behavioural and dynamic aspects are explored using interaction diagrams and state transition diagrams.

关键词： programming support business processes modelling High level languages system requirements object-oriented programming Formal methods specification languages conceptual modelling formal specification object-oriented languages interaction diagrams UML state transition diagrams Internet theatre ticket booking system object-oriented notation systems analysis

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An individual-based model of Plasmodium falciparum malaria transmission on the coast of Kenya

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TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE 2003年第1期97卷 43-50页

作者： Gu, WD Killeen, GF Mbogo, CM Regens, JL Githure, JI Beier, JC Tulane Univ Hlth Sci Ctr Sch Publ Hlth & Trop Med Dept Trop Med New Orleans LA 70112 USA Kenya Govt Med Res Ctr KEMRI Kilifi Kenya Univ Oklahoma Inst Sci & Publ Policy Norman OK 73019 USA ICIPE Nairobi Kenya

Individual-based models provide powerful tools to model complex interactions characterized by individual variability. This paper presents an object-oriented design for individual-based modelling of Plasmodium falciparum malaria transmission. Two kinds of objects, human and mosquito, that exhibit variability among individuals for parameters such as recovery and survival rates are defined. The model tracks the dynamics of human hosts and adult female mosquitoes individually. Immunity, modelled as a function of exposure history, is represented by reduced susceptibility and increased recovery rate. The model was calibrated using epidemiological data collected at 30 sites along the coast of Kenya. The sites were grouped into low, intermediate and high transmission based on mean daily human-biting rates. Simulation results show that malaria transmission was stable even in low transmission areas where the human-biting rate is approximately 0.5 bite per day. The model was used to examine the effect of infection control programmes that aim at interrupting transmission by reducing human-vector contact rates and implementing active case detection and drug treatment of infections. With this intervention, local elimination of malaria is likely with a probability of extinction of approximately 0.8 in low transmission areas. However, a small amount of immigration (> 0.3%) by infected people into the community could prevent local extinction of the parasite. In intermediate and high transmission areas, reduction in prevalence is short-lived and the probability of local elimination is low, even at high coverage levels of the intervention.

关键词： malaria Plasmodium falciparum individual-based model object-oriented programming transmission infection control Kenya

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The development of the software for the controller of an automatic machine workshop by object-oriented programming

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JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 2000年第1-3期101卷 231-237页

作者： Hsu, CL Liu, YS Chung Shan Inst Sci & Technol Mech Design & Mfg Ctr Lungtan Taiwan

The material presented is to introduce how an advanced object-oriented programming (OOP) technique can be applied to an automatic machine workshop. It is a user-friendly and well-manipulated software which uses a semantic net of information representation by applying a hierarchy of various object components and/or structures. It has already been proven to be a very useful software concept in handling a flexible, automatic manufacturing system. In order to discuss further the application of the OOP concept in detail, an automatic machine workshop is used as an example to illustrate the applications. It is found that this kind of object-based approach offers a swift tool to integrate objects into a manufacturing environment to make the control of an automatic machine workshop possible. (C) 2000 Elsevier Science S.A. All rights reserved.

关键词： object-oriented programming flexible manufacturing system semantic net

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Teaching programming broadly and deeply: The Kernel language approach

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Conference on Informatics Curricula, Teaching Methods and Best Practice

作者： Van Roy, P Haridi, S Univ Catholique Louvain Dept Comp Sci & Engn INGI B-1348 Louvain Belgium

ISBN: (纸本)140207266X

We present the kernel language approach;a new way to teach programming that situates most of the widely known programming paradigms (including imperative, object-oriented, concurrent, logic, and functional) into a uniform setting that shows their deep relationships and how to use them together. Widely different practical languages (exemplified by Java, Haskell, Prolog, and Erlang) with their rich panoplies of abstractions and syntax are explained by straightforward translations into closely related kernel languages, simple languages that consist of small numbers of programmer-significant concepts. Kernel languages are easy to understand and have a simple formal semantics that can be used by practicing programmers to reason about correctness and complexity.

关键词： computer programming education curriculum science engineering programming concepts programming paradigms kernel language dataflow concurrency functional programming object-oriented programming logic programming imperative programming programming techniques

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The structured complexity of object-oriented programs

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MATHEMATICAL AND COMPUTER MODELLING 2003年第7-9期38卷 815-827页

作者： Fóthi, A Nyéky-Gaizler, J Porkoláb, Z Eotvos Lorand Univ Dept Gen Comp Sci H-1117 Budapest Hungary

There are several methods measuring the complexity of object-oriented programs. Most of them are based on some special object-oriented feature: number of methods/classes, cohesion of classes, inheritance, etc. In practice, however, object-oriented programs are constructed with the help of the same control structures as traditional ones. Moreover, recent ideas of multiparadigm programming (i.e., emerging use of generic programming and aspect-oriented programming) has the effect that in modern programs-and even in class libraries-object-orient at ion is only one (however major) construction tool among others. An adequate measure therefore should not be based on special features of one paradigm, but on basic language elements and construction rules which could be applied to many different paradigms. In our model discussed here, the complexity of a program is the sum of three components: the complexity of its control structure, the complexity of data types used, and the complexity of the data handling (i.e., the complexity of the connection between the control structure and the data types). We suggest a new complexity measure. First, we show that this measure works well on procedural programs, and then we extend it to object-oriented programs. There is a software tool under development based on gnu g++ compiler which computes our new measure. We can apply this tool to C and C++ sources to gain a number of quantitative results with our measure. (C) 2003 Elsevier Ltd. All rights reserved.

关键词： software metrics object-oriented programming complexity

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Computer-Aided Planned Maintenance System for Medical Equipments

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Journal of Medical Systems 2003年第4期27卷 393-398页

作者： Müldür, Serdar HAVELSAN A.Ş. Ankara Eskişehir Yolu 7 km Turkey

In this study, a software package is introduced, which has been developed to monitor and administer preventive maintenance activities for healthcare devices and system components in a hospital to provide uninterruptible operation in a computer-aided fashion. This software with its object-oriented and graphic user interface (GUI) nature aims to standardize preventive maintenance activities while providing overall optimization of material used in preventive maintenance activities;personnel administers the maintenance and time dedicated for the activities.

关键词： Medical equipment object-oriented programming Planned maintenance system Preventive maintenance

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The optimal switching operation of distribution systems with stochastic load models by object-oriented programming

The optimal switching operation of distribution systems with...

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International Conference on Power System Technology (POWERCON 2000)

作者： Lin, CH Chen, CS Wu, CJ Kao Yuan Inst Technol Dept Elect Engn Kaohsiung Taiwan

ISBN: (纸本)0780363388

This paper is to solve the optimal switching operation considering the stochastic load models by object-oriented programming for the Distribution Automation System in Taiwan Power Company. The attributes of 4-way line switches in the underground distribution network are defined to store the information of switch on-off status, current loading phase voltage, and the up and down stream line switches. With the object-oriented programming, the distribution network configuration can be easily identified by connectivity trace according to the line switch status. Besides, the current flows of line switches can be updated when the optimal switching operation is performed to balance the loads on feeders and reduce the risk of overloads. The optimal switching operations perform the load transfer among the feeders and main transformers to achieve the load balance and loss minimization. To support these functions more effectively the stochastic load models of service customers are derived. The probabilistic load flows of line switches are solved by the stochastic power system analysis. By this manner, the dynamic load behavior can be included in the derivation of optimal switching operation. In this paper, the binary integer programming which incorporated with probabilistic load flow is proposed to help system operators determine the optimal switching operation and to balance the loading of feeders. The current flows of line switches and feeder configuration are updated according to the switching operation. In this study, the practical distribution system feeders are selected for computer simulation to demonstrate the effectiveness of the proposed methodology to solve the optimal switching operation.

关键词： object-oriented programming stochastic load plow

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HydroJ: object-oriented pattern matching for evolvable distributed systems

HydroJ: Object-oriented pattern matching for evolvable distr...

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18th Annual Conference on object-oriented programming, Systems, Languages and Applications (OOPSLA 2003)

作者： Lee, K LaMarca, A Chambers, C Univ Washington Seattle WA 98195 USA Intel Res Seattle WA USA

In an evolving software system, components must be able to change independently while remaining compatible with their peers. One obstacle to independent evolution is the brittle parameter problem: the ability of two components to communicate can depend on a number of inessential details of the types, structure, and/or contents of the values communicated. If these details change, then the components can no longer communicate, even if the essential parts of the message remain unaffected. We present HydroJ, an extension of Java that addresses this problem. In HydroJ, components communicate using self-describing, semi-structured messages, and programmers use pattern matching to define the handling of messages. This design stems from two central ideas: first, that self-describing messages reduce dependence on inessential message format details;and second, that object-oriented pattern matching naturally focuses on the essential information in a message and is insensitive to inessential information. We have developed these ideas in the context of Rain, a distributed, heterogeneous messaging system for ubiquitous computing. To evaluate the design, we have constructed a prototype HydroJ compiler, implemented some Rain services in HydroJ, studied the evolution of an existing Rain service over time, and formalized HydroJ's key features in a core language.

关键词： languages pattern matching dynamic dispatch XML semi-structured data software evolution object-oriented programming distributed systems ubiquitous computing HydroJ

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PC-NC communication by dual-port memory 7

PC-NC communication by dual-port memory

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7th IFAC Workshop on Intelligent Manufacturing Systems

作者： Deák, F Budapest Univ Technol & Econ Dept Mfg Engn H-1111 Budapest Hungary

ISBN: (纸本)0080442897

The application of standard Intel processor based personal computers and the Windows operating system is a trend that cannot be ignored. An integrated PC card is described which extends NC controllers with new feature: network communication, floppy disk and hard disk and flash drive. PC and NC unit communicate by using dual port memory, which has two sets of address, data and read/write control signals, each of them access the same set of memory cells. Copyright (C) 2003 IFAC

关键词： CNC communication systems computer interfaces driver embedded systems object-oriented programming numeric control operating systems

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An object-oriented graphical representation for engineering network analysis in power system

An object-oriented graphical representation for engineering ...

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IEEE-Power-Engineering-Society General Meeting

作者： Maricar, NM Shahidehpour, SM Kolej Univ Teknikal Kebangsaan Malaysia Fac Elect Engn Malaka 75450 Malaysia IIT Dept Elect & Comp Engn Chicago IL 60616 USA

ISBN: (纸本)0780379896

Analyzing the power system network is becoming difficult task because of the volume of data that must be examined. A more serious problem than the over massive of data in analyzing the power system is the manner in which data is presented. It is difficult to visualize an electrical network by examining tabular data output. Converting the data into computer graphic presentations has solved many similar problems. The user will be able to discover problems in the network much faster and easier than traditional methods have previously allowed.

关键词： power system visualization graphical user interface visual programming graphical representation electrical network digraph object-oriented programming

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