To increase product competitiveness, current manufacturing enterprises have to deliver their products at reduced cost and high quality in a short time. Traditional production patterns and manufacturing technologies ma...
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Buffering inside a distributed monitoring software system that runs inside a LAN and stores readings on a central component is a very important issue. This paper presents the structure of a buffering application that ...
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ISBN:
(纸本)9783901509834
Buffering inside a distributed monitoring software system that runs inside a LAN and stores readings on a central component is a very important issue. This paper presents the structure of a buffering application that is based on a DB4objects object database. The application is designed to operate inside a distributed monitoring software system between the data acquisition and server components. Its main purpose is to offer persistent storage for the readings in the case of communication problems between the two components. When the communication problems are fixed, the application resumes sending real time readings and starts transferring the buffer's contents to the server. For optimal performance, the buffer is divided in partitions that contain the readings associated to one hour.
In this paper, we presented our technique to extract and to use the spatial relationships between two or more salient objects. Using an objectoriented hypergraph data structure, the spatial relationships are determin...
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This paper reports on a 2-year research project undertaken in collaboration with a state planning authority, a major city municipal council and a government-owned development organisation. The project involved the des...
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State of the art 3D simulation applications like virtual testbeds for space robotics, industrial automation or even forest inventory require a highly flexible but still real-time capable data management system. For th...
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In recent years search for proper extensions of the object model to suit real-time database community has become a critical research issue. In this paper, we present such an extension of the object model, called RTO-R...
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ISBN:
(纸本)9780889869073
In recent years search for proper extensions of the object model to suit real-time database community has become a critical research issue. In this paper, we present such an extension of the object model, called RTO-RTDB. A concrete static and dynamic views of the model are presented. A major attraction of this model is in that it is effective not only in the use of the feedback control real-time scheduling theory but also in the accurate representation of realtime databases properties. It is used to demonstrate how to separate structural and concurrency concerns ensuring also high-level abstraction for parallelism modeling. In order to improve and to facilitate the RTO-RTDB object model specification, we have used the MARTE and UML-RTDB profiles as UML extensions to describe real-time aspects on one hand, and to express real-time database features on the other hand.
A proxy object is a surrogate or placeholder that controls access to another target object. Proxy objects are a widely used solution for different scenarios such as remote method invocation, future objects, behavioral...
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The object model is very promising for realtime applications that must handle complex real-world objects with short deadlines due to its capabilities for modeling, storing, and manipulating complex objects. However, r...
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Database model is an essential topic in software engineering. This paper highlights the technical and commercial differences between objectoriented database management system OODBMS and relational database management...
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In contemporary Geographical Information Systems (GIS) the large variety of digital map sources requires the handling and storing of various descriptive data in a single storage facility. Although the number and type ...
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