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Solving Inheritance Anomaly with OMNets

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维普期刊数据库

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Journal of Computer Science & Technology 2002年第1期17卷 101-105页

作者：喻坚王生原袁崇义 Department of Computer Science and Technology Peking University Beijing 100871 P.R. China

This paper presents a concurrent object-oriented modeling language based on Petri nets: OMNets, which helps greatly to avoid the inheritance anomaly problem appeared in concurrent OO languages. OMNets separates the functional part and the synchronization part of objects and uses Petri nets to describe the synchronization part. Both parts are reusable through inheritance.

关键词： inheritance anomaly concurrency object-orientation Petri net

Measuring Class Cohesion Based on Dependence Analysis

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维普期刊数据库

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Journal of Computer Science & Technology 2004年第6期19卷 859-866页

作者： Zhen-QiangChen Bao-WenXu Yu-MingZhou DepartmentofComputerScienceandEngineering SoutheastUniversityNanjing210096P.R.China StateKeyLaboratoryofSoftwareEngineering WuhanUniversityWuhan430072P.R.China JiangsuInstituteofSoftwareQuality Nanjing210096P.R.China

Classes are the basic modules in object-oriented (OO) software, which consist of attributes and methods. Thus, in OO environment, the cohesion is mainly about the tightness of the attributes and methods of classes. This paper discusses the relationships between attributes and attributes, attributes and methods, methods and methods of a class based on dependence analysis. Then the paper presents methods to compute these dependencies. Based on these, the paper proposes a method to measure the class cohesion, which satisfies the properties that a good measurement should have. The approach overcomes the limitations of previous class cohesion measures, which consider only one or two of the three relationships in a class. Keywords cohesion - object-orientation - class - program complexity - dependence analysis Supported by the National Natural Science Foundation of China under Grant No.60073012; the National Basic Research 973 Program of China under Grant No.2002CB312000; the Program for Cross-Century Outstanding Teachers of the Ministry of Education; the National Research Foundation for the Doctoral Program of Higher Education of China under Grant No.20020286004; the Natural Science Foundation of Jiangsu, China, under Grant ***2001004; the Jiangsu Key Science and Technology Project under Grant ***2001025; the Opening Foundation of State Key Laboratory of Software Engineering in Wuhan University; the Opening Foundation of Jiangsu Key Laboratory of Computer Information Processing Technology in Soochow University.Zheng-Qiang Chen was born in 1976. He received the M.S. and Ph.D. degrees in computer science in 2000 and 2003, respectively. His current research interests include program analysis, understanding and testing as well as other topics related to reverse engineering. He has published more than 30 technical papers.Bao-Wen Xu was born in 1961. He received the M.S. and Ph.D. degrees in computer science in 1984 and 2002, respectively. He is a professor in the

关键词： cohesion object-orientation class program complexity dependence analysis

Towards Restructuring and Normalization of Types in Databases

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维普期刊数据库

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Journal of Computer Science & Technology 1995年第1期10卷 65-73页

作者：杨立 Institute of Automation The Chinese Academy of Sciences Beijing

The equivalence- preserving transformation and normalization of types inobject-oriented databases are discussed. Specifically a normal form of typesbased on set-theoretic equivalence is proposed, rewrite rules which transformtypes into normal forms are presented, and the uniqueness of normal form andthe completeness of rewrite rules are proved. The emphasis of this work ison normal forms and corresponding rewrite rules. It provides a new formalapproach for the study of restructuring of database schema and other manipu-lations in object-oriented databases.

关键词： object-orientation object-restructuring database normalization

An approach to software development based on heterogeneous component reuse and its supporting system

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Science China(Technological Sciences) 1997年第4期40卷 405-413页

作者：杨芙清梅宏吴穹朱冰 Department of Computer Science and Technology Peking University Beijing 100871 China

Software reuse is considered as a practical approach to solving the software crisis. The BD-HCRUS, a software development supporting system based on heterogeneous component reuse, is introduced. The system has a reusable component library as its kernel in charge of the organization, storage and retrieval of the heterogeneous components, an object-oriented integrated language for the specification and composition of the heterogeneous components, and program comprehension tools for reverse-engineering and extracting reusable components from source code, then re-engineering the components. Therefore, a whole support is lent systematically to the acquisition, specification, organization, storage, retrieval and composition of reusable components.

关键词： software reuse heterogeneous component component library object-orientation program comprehension.

Dynamic object-Oriented Model of Concurrent Design Process

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High Technology Letters 1996年第2期2卷 5-8页

作者：来可伟 Dept.of Computer Science Dept.of Mechanical EngineeringTianjin UniversityTianjin 300072P.R.China

This article reports our research progress in concurrent design theory and *** idea of Micro-Design-Cycle is introduced to provide a mechanism of coordinating variousdesign activities in parallel as much as *** object-Life-Cycle diagram is developedas an instrument to visualize the Micro-Design-Cycle and as a practical tool of timing variousactivities being performed in Micro-Design-Cycles.

关键词： Concurrent design Design theory and methodology object-orientation

Monitoring of vegetation coverage based on high-resolution images

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Forestry Studies in China 2007年第4期9卷 256-261页

作者： Zhang Li Li Li-juan Liang Li-qiao Li Jiu-yi Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P. R. China Graduate University of the Chinese Academy of Sciences Beijing 100039 P. R. China

Measurement of vegetation coverage on a small scale is the foundation for the monitoring of changes in vegetation coverage and of the inversion model of monitoring vegetation coverage on a large scale by remote sensing. Using the object-oriented analytical software, Definiens Professional 5, a new method for calculating vegetation coverage based on high-resolution images （aerial photographs or near-surface photography） is proposed. Our research supplies references to remote sensing measurements of vegetation coverage on a small scale and accurate fundamental data for the inversion model of vegetation coverage on a large and intermediate scale to improve the accuracy of remote sensing monitoring of changes in vegetation coverage.

关键词： vegetation coverage remote sensing measurement high-resolution image object-orientation

ENTITY-ROLES MODEL AND object-ORIENTED KNOWLEDGE/DATA BASES

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Journal of Central South University 1994年第1期6卷 74-77页

作者： Pan Jiuhui Liu Zhimin Wang Yunyi(Department of Computer Science, Central South University of Technology, Changsha, 410083, China) Department of Computer Science Central South University of Technology Changsha China

A Model, called 'Entity-Roles' is proposed in this paper in which the world of Interest is viewed as some mathematical structure. With respect to this structure, a First order (three-valued) Logic Language is *** world to be modelled can be logically specified in this Language. The integrity constraints on the database and the deducing rules within the Database world are derived from the proper axioms of the world being modelled.

关键词： expert systems data model object-orientation database logic deductive query

DEVELOPMENT OF A GIS DATA MODEL WITH SPATIAL,TEMPORAL AND ATTRIBUTE COMPONENTS BASED ON object-ORIENTED APPROACH

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Geo-Spatial Information Science 2000年第1期3卷 17-23页

作者： SHI Wenzhong ZHANG Minwen Department of Land Surveying and Geoinformatics The Hong Kong Polytechnic University Kowioon Hong Kong

This paper presents a conceptual data model, the STA-model, for handling spatial, temporal and attribute aspects of objects in GIS. The model is developed on the basis of object-oriented modeling approach. This model includes two major parts: (a) modeling the signal objects by STA-object elements, and (b) modeling relationships between STA-objects. As an example, the STA-model is applied for modeling land cover change data with spatial, temporal and attribute components.

关键词： object-orientation GIS data modeling spatial, temporal and attribute model

Assessing Internal Software Quality Attributes of the object-Oriented and Service-Oriented Software Development Paradigms: A Comparative Study

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Journal of Software Engineering and Applications 2011年第4期4卷 244-252页

作者： Yaser I. Mansour Suleiman H. Mustafa 不详

Service-Oriented Architecture (SOA) is becoming the dominant approach for developing and organizing distributed enterprise-wide applications. Although the concepts of SOA have been extensively described in the literature and in-dustry, the effects of adopting SOA on software quality are still unclear. The aim of the paper is to analyze how adopt-ing SOA can affect software quality as opposed to the object-Oriented (OO) paradigm and expose the differential implications of adopting both paradigms on software quality. The paper provides a brief introduction of the architectural differences between the Service-Oriented (SO) and OO paradigms and a description of internal software quality metrics used for the comparison. The effects and differences are exposed by providing a case study architected for both paradigms. The quantitative measure concluded in the paper showed that a software system developed using SOA approach provides higher reusability and lower coupling among software modules, but at the same time higher complexity than those of the OO approach. It was also found that some of the existing OO software quality metrics are inapplicable to SOA software systems. As a consequence, new metrics need to be developed specifically to SOA software systems.

关键词： Service-Oriented Architecture object-orientation Internal Software Quality Attributes Software Quality Metrics