object-oriented programming [9], which treats objects as processes in execution, has shown significant effectiveness in distributed systems. This effectiveness is greatly influenced by how objects are assigned to node...
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object-oriented programming [9], which treats objects as processes in execution, has shown significant effectiveness in distributed systems. This effectiveness is greatly influenced by how objects are assigned to nodes. In this paper, we present a colored generalized stochastic Petri net (CGSPN) model to analyze the behavior of object invocations when an assignment strategy is applied. The effectiveness of an object assignment is also analyzed by our CGSPN model. Moreover, this analysis provides guidelines to develop an efficient object assignment strategy. [4-8].
This research article demonstrates the use of constraint networks for modelling the knowledge which is necessary for concurrent product and process design. A knowledge;based constraint network system has been develope...
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This research article demonstrates the use of constraint networks for modelling the knowledge which is necessary for concurrent product and process design. A knowledge;based constraint network system has been developed to maintain design consistency and to support the selection of appropriate manufacturing processes according to pre-defined constraints. A number of constraints related to existing manufacturing facilities and expertise are formulated and modelled using the rules of the knowledge-based toolkit. These constraints are implemented to identify the appropriate machining processes and to show the feasibility of a product's design as it progresses and before making the final prototype. The combination of design and manufacturing constraints enables designers to examine whether the designed part can be manufactured with the available manufacturing facilities. (C) 1998 Elsevier Science Ltd. AII rights reserved.
Software metrics serve as a significant issue to improve software quality. It is an important research of software engineering. In line with the methodologies of object-oriented analysis and design widely developed, m...
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Software metrics serve as a significant issue to improve software quality. It is an important research of software engineering. In line with the methodologies of object-oriented analysis and design widely developed, many software metrics techniques have been proposed. However, not many focus on the metrics evaluation of an inheritance hierarchy. In this paper, we propose a novel concept named unit repeated inheritance (URI) in Z notation to realize object-oriented software metrics. The approach describes an inheritance level technique (ILT) method as a guide to measure the software complexity of an inheritance hierarchy. The measures of inheritance metrics are formed based on the proposed mechanism. Also, we use Lex and Ya;cc to construct a windowing tool which is used in conjunction with a conventional C++ programming environment to assist a programmer to analyze and measure his/her C++ programs.
This paper presents a class library dedicated to digital image processing which provides resources for essential digital image processing operations. Besides its practical value, the class library is used to teach bot...
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This paper presents a class library dedicated to digital image processing which provides resources for essential digital image processing operations. Besides its practical value, the class library is used to teach both object-oriented software engineering methodology and digital image processing. The resulting module can be accessed from independent specialized applications through its public interface while its implementation details are perfectly encapsulated. First of all it is used as the inner part of an integrated environment designed for students and researchers in the field of digital image processing. This software component was built aiming for both portability and extendibility. It contains attributes and methods that allow for a wide range of digital image processing algorithms: point and geometric operations;filter, edge detection, segmentation and texture operations;and fast Fourier transforms, discrete cosine transforms, and wavelet and Gabor transformations. All these can be used for image enhancement, restoration, compression, analysis, and synthesis.
The Java programming language is an architecture-independent, objectoriented language, designed for secure local and network applications. Programs written in Java can either be embedded within hypertext documents on...
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The Java programming language is an architecture-independent, objectoriented language, designed for secure local and network applications. Programs written in Java can either be embedded within hypertext documents on the World Wide Web (so-called applets), or be fully stand-alone, as software written in other programming languages. In this article, we present two sample quantum chemistry applications written in Java. The first is an educational applet, illustrating an LCAO-SCF calculation of the ground state of the helium atom using a double-zeta basis set. The second is a prototype one- and two-electron integral package for Gaussian-type atomic orbitals. The potential for Java applications to play an educational role and for the construction of object-oriented libraries of basic functionality for quantum chemical software is discussed. (C) 1998 John Wiley & Sons, Inc.
Opposed to traditional mathematical methods, the technique of individual-oriented modelling chooses distinguishable individuals as the basic entities of description. An ecosystem is described by all static and dynamic...
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Opposed to traditional mathematical methods, the technique of individual-oriented modelling chooses distinguishable individuals as the basic entities of description. An ecosystem is described by all static and dynamic properties of the individuals involved in the system as well as time varying properties of the environment. Individuals change their state over lime or due to internal and external events. Using the individual-oriented approach, programming skills are indispensable. Coding individual-oriented models is a complex, tedious and error prone task, which leads to a long list of problems. Many, although not all, problems may be solved using object-oriented software libraries. ECOSIM is a C++-class library especially designed to support individual-oriented modelling and simulation of ecological systems. ECOSIM brings together new advances in object-oriented discrete-event simulation and ecology. The process of implementing individual-oriented models is facilitated by providing classes for those parts, that are common to all such models. This covers among others the specification of static and dynamic properties of 'individuals', the specification of dynamically changing environments as well as support for 'on the fly' analysis and animation of generated data. Using ECOSIM ecologists may therefore concentrate on the unique parts of their models. (C) 1998 Elsevier Science B.V. All rights reserved.
This paper proposes a code reuse mechanism called module embedding that enables the building of new modules from existing ones through inheritance, overriding of procedures, and overriding of types;the paper also desc...
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This paper proposes a code reuse mechanism called module embedding that enables the building of new modules from existing ones through inheritance, overriding of procedures, and overriding of types;the paper also describes an implementation scheme for this mechanism. Module embedding is beneficial when modules and classes are used in combination and need to be extended together, or when modules are a more appropriate medium than classes.
We show how SymbolicC++, a symbolic and numeric computer algebra system written in C++, can be used to find exact solutions of soliton equations in (2 + 1)-dimensions.
We show how SymbolicC++, a symbolic and numeric computer algebra system written in C++, can be used to find exact solutions of soliton equations in (2 + 1)-dimensions.
An object-oriented extension to the real-time programming language PEARL is presented in this paper. The new language preserves PEARL's expressiveness for timeliness and industrial processes and, at the same time,...
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An object-oriented extension to the real-time programming language PEARL is presented in this paper. The new language preserves PEARL's expressiveness for timeliness and industrial processes and, at the same time, improves the language's readability and manageability through the adoption of a better encapsulation paradigm, derived from the object concept. Some extensions are also proposed, to enhance the language's testability and safety. The proposed language is fully backward compatible with PEARL, while allowing powerful abstraction concepts. (C) 1998 Elsevier Science Ltd. All rights reserved.
Agent orientedprogramming(AOP)([2]) is a special kind of object-oriented programming. It can be worked out best for open systems and has the potentials to become a very attractive technique in the future. In this pap...
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ISBN:
(纸本)0818684321
Agent orientedprogramming(AOP)([2]) is a special kind of object-oriented programming. It can be worked out best for open systems and has the potentials to become a very attractive technique in the future. In this paper, we describe a specification and programming language-SPLAW. The syntax and operational semantics of SPLAW are presented, and by means of labeled transition system, the proof theory is also provided. SPLAW is based on KQML, the standard infer-agent communication language, which makes it possible for agents written in SPLAW to interoperate with of her agents obeying KQML.
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