After an extensive evaluation, the Eiffel objectoriented language has been selected for the design and implementation of the run control portion of the CEBAF Data Acquisition System. The OSF/Motif graphical user inte...
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After an extensive evaluation, the Eiffel objectoriented language has been selected for the design and implementation of the run control portion of the CEBAF Data Acquisition System. The OSF/Motif graphical user interface toolkit and Data Views process control system have been incorporated into this frame-work. We discuss the evaluation process, the status of the implementation and the lessons learned, particularly in the use of objectoriented techniques.
A formal object-oriented approach to the data structuring and data management of semiconductor wafer structure and device information is presented. The profile interchange format (PIF) is extended beyond a file format...
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A formal object-oriented approach to the data structuring and data management of semiconductor wafer structure and device information is presented. The profile interchange format (PIF) is extended beyond a file format "intersite" version in order to enhance the storage and access of profile information, the communication of profile information between cooperating tools, and the integration and portability of technology CAD tools. An intertool PIF toolkit is a programmatic interface to profile information, consisting of a library of objects for the storage and manipulation of data by technology CAD (TCAD) tools. PIF/Gestalt is presented as a test implementation of the toolkit which provides C and Common Lisp language interfaces, implemented on a data base for use in a CAD/CIM system for semiconductor process design and fabrication. Test applications using PIF/Gestalt demonstrate the desirability of the formal object model, the appropriateness of an object-oriented interface, and implementation of that model on an object-oriented data base.
Traditional database design methodologies are not appropriate for the specific requirements of object-oriented database systems and new database application areas. Apart from semantic complications arising from object...
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Traditional database design methodologies are not appropriate for the specific requirements of object-oriented database systems and new database application areas. Apart from semantic complications arising from object-oriented database structures with complex objects, arbitrary data types as attribute domains, or generalization hierarchies, specification and semantics of dynamic database behaviour has to be of main interest for typical object-oriented applications, too. We propose the use of a temporal logic as a specification language for dynamic object behaviour and point out the formal semantics of such database dynamics specifications. A layered conceptual database design methodology is presented together with a discussion on design support techniques for behaviour specifications. Finally, implementation aspects are treated.
The process control system can reduce the amount of scrap generated in the manufacture of rivets through the application of continuous corrective adjustments to the machines. In place of manual method, the system has ...
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The process control system can reduce the amount of scrap generated in the manufacture of rivets through the application of continuous corrective adjustments to the machines. In place of manual method, the system has a totally automatic closed loop control, whereby the rivets are fed to a vision system which after inspection can alter the machine setting via servomotors.
In order to prepare the next generation of network management systems, France Telecom/CNET experiments the newly standardized concepts of telecommunication management network. In this context a fault management protot...
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In order to prepare the next generation of network management systems, France Telecom/CNET experiments the newly standardized concepts of telecommunication management network. In this context a fault management prototype has been realised using an objectoriented environment. This prototype is composed of a network element simulator and a management system connected through a full Q3 interface. It provides alarm surveillance functions compliant with the OSI network management forum specifications. The software development allowed to prove that objectoriented techniques are well suited to implementation of network management applications, and to assess the various tools and design choices.
Most real-world systems are usually characterized by complex interactions between a variety of components that include distributed and parallel software, hardware and communication components. In particular, a manufac...
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Most real-world systems are usually characterized by complex interactions between a variety of components that include distributed and parallel software, hardware and communication components. In particular, a manufacturing system consists of a group of interaction subsystems. However, the architecture of a manufacturing system requires money and time when organization, products market constraints must change. This conclusion is due to the fact that the classical architectures of manufacturing systems is for representing static relationships, but it is not suitable for representing dynamic relationships. Advanced tools for design and simulation are required to help implement such systems. object-oriented methodologies are becoming the mainstream approach for software development in general because they enable software houses to develop applications in a manpower effective way. This applies all the way down from analysis and design to implementation, testing and maintenance (the latter includes the evolution that is caused by ever changing requirements). The increased modularity that is inherent to the use of objects is a crucial advantage when modifying specific parts of the product, when porting applications with respect to varying infrastructure, when isolating errors, etc. However, the design and implementation of concurrent programs has proven to be extremely difficult. Concurrent programs are difficult to design, implement and maintain because changes in a concurrent program (adding new components, modification of existing components) requires re-implementation of some or all components. The problem can be summarized by the fact that if the interaction constraints are implemented in the methods of an object, these methods may not be inherited because subclasses may not interact in the same way and with the same objects as their super-classes. To solve this problem, we propose to distinguish and to separate two behaviours: the behaviour which specifies the opera
This paper describes the implementation of a functional simulator for the interconnection of heterogeneous high-speed data networks. After trying several approaches, we use the object-oriented conception and language ...
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This paper describes the implementation of a functional simulator for the interconnection of heterogeneous high-speed data networks. After trying several approaches, we use the object-oriented conception and language to permit the use of dynamic control of each protocol (FDDI, DQDB, ATM). We studied the most interesting QOS parameters for our context. For the administration aspect of a heterogeneous network, the simulator permits the evaluation of the evolution of the QOS for the interworking units.
The integration of absorption refrigeration equipment into Cooling, Heating and Power systems must guarantee economic viability, operability and reliability. Accurate control design is mandatory to fulfill such requir...
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The integration of absorption refrigeration equipment into Cooling, Heating and Power systems must guarantee economic viability, operability and reliability. Accurate control design is mandatory to fulfill such requirements, and make system design successful. The use of model-based control techniques and the introduction of controls testing via numerical simulation rely on the availability of accurate, robust and flexible dynamic models. In this paper, a model library of absorption systems with different working mediums and cycle configurations is presented. Library flexibility and extensibility is achieved through the adoption of object-oriented modeling techniques, allowing considerable reduction of the development time through model reuse. The library has been used to simulate the transient behavior, including startup and shutdown, of several systems. Validation against experimental data has proven the accuracy of modeling assumption. (c) 2005 Elsevier Ltd. All rights reserved.
During the last two decades, many companies have made large investments in the development and implementation of production planning and control systems. However, only a few of these systems developed or installed hav...
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During the last two decades, many companies have made large investments in the development and implementation of production planning and control systems. However, only a few of these systems developed or installed have actually been used in practice, and even fewer have made a significant impact on manufacturing industries. systems, after being implemented, often remain in use for only for a limited time. Effective modelling is one of the most important and difficult steps in the development of reliable information systems and production planning and control in industry is very difficult. This paper presents an object-oriented analysis (OOA) and describes the design of a model for production planning and control in a customised industrial environment. The proposed model was designed for the development of innovative industrial software for the optimum management of production planning in a wide range of business areas.
Tactile Sensing is not simply the ability to detect that a contact has occurred between an object and a manipulator, but encompasses a more comprehensive ability to grasp and identify shape, surface features, material...
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Tactile Sensing is not simply the ability to detect that a contact has occurred between an object and a manipulator, but encompasses a more comprehensive ability to grasp and identify shape, surface features, material features, force and slippage, etc. As technology progresses, sensors able to detect these features have become a reality, and the problem of integrating the information from such sensors must be taken into account. To achieve this objective an appropriate system organisation is required to efficiently and correctly integrate the data into a robust world model. Since the number of sensors that may be applied to any kind of problem is increasing daily modularity, reusability and expandability are important properties and to achieve this flexibility an objectoriented approach has been followed in modelling the system. This paper considers the use of a multi-functional tactile system and its integration with an objectoriented Expert Identifier System (OOEIS) which is able to fuse data coming from a sensorized finger, with the aim of identifying the material properties of an object being touched.
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