This paper presents a visual approach to the representation and validation of multimedia document structures specified in XML and transformation of one structure to another. The underlying theory of our approach is a ...
详细信息
ISBN:
(纸本)0780371984
This paper presents a visual approach to the representation and validation of multimedia document structures specified in XML and transformation of one structure to another. The underlying theory of our approach is a context-sensitive graph grammar formalism. The paper demonstrates the conciseness and expressiveness of the graph grammar formalism. An example XML structure is provided and its graph grammar representation, validation and transformation to a multimedia representation are presented.
A very inexpensive receive-only satellite receiver can receive high bandwidth traffic from a feeder. Therefore the connection between the feeder and the receiver is uni-directional. The existing routing protocols, suc...
详细信息
A very inexpensive receive-only satellite receiver can receive high bandwidth traffic from a feeder. Therefore the connection between the feeder and the receiver is uni-directional. The existing routing protocols, such as Link-State and Distance-Vector, are designed on the premise that any links are bidirectional and they cannot handle the uni-directional links. In this paper,a dynamic multicast routing protocol is proposed, which can handle uni-directional networks. This protocol can also adapt to the dynamic change of the topology of the network and has good scalability. A formal description of the protocol by Petri net is given. Liveness, deadlock free and other properties of the protocol are proved.
A mass of heterogeneous, distributed and dynamic information on the World Wide Web (the Web) has resulted in 'information overload'. It's an important and urgent research issue to provide users with effec...
详细信息
A mass of heterogeneous, distributed and dynamic information on the World Wide Web (the Web) has resulted in 'information overload'. It's an important and urgent research issue to provide users with effective information retrieval service on the Web. Web search engines attempt to solve this problem, yet their effect is far from satisfying. In this paper, a distributed and cooperative strategy for information retrieval on the Web is proposed to substitute the centralized mode adopted by the current search engines. Then a new information retrieval system model IRSM is presented, which supports the retrieval of metadata about Web documents and uses Z39.50 standard protocol to unify the heterogeneous interfaces of. different systems. Based on that, a distributed and cooperative information retrieval framework, called DCIRF, is designed to help users in fast and effective information retrieval on the Web.
The data dependence analysis is a hard problem, particularly in the presence of data structures similar to the pointer. The inheritance and the polymorphism in object-oriented languages provide program design and soft...
详细信息
In this paper, we describe a novel neural network architecture, which can recognize human faces with any view in a certain viewing angle range (fromy left 30 degrees to right 30 degrees out of plane rotation). View-sp...
详细信息
For real-time systems, UML sequence diagrams describe interactions among objects, which show scenarios of the system behaviour. A simple UML sequence diagram describes exactly one scenario. For describing multiple sce...
详细信息
For real-time systems, UML sequence diagrams describe interactions among objects, which show scenarios of the system behaviour. A simple UML sequence diagram describes exactly one scenario. For describing multiple scenarios and specifying real-time systems, we need to consider the compositions of UML sequence diagrams. In this paper, we introduce high-level graphs to describe compositions of UML sequence diagrams, and develop an algorithm for checking them for timing inconsistencies.
Many data objects in the real world have attributes concerning location and time. Such spatiotemporal objects can be found in applications such as geographic information systems (GIS), environmental data management an...
详细信息
Many data objects in the real world have attributes concerning location and time. Such spatiotemporal objects can be found in applications such as geographic information systems (GIS), environmental data management and multimedia databases. Traditional relational database technology is not suitable for managing spatiotemporal data, which are multi-dimensional with complex structures and behaviours. Spatiotemporal data can only be managed by the new generation of data management technologies such as object-oriented and object-relational databases. We present a comprehensive survey covering aspects from fundamental user requirements for spatiotemporal applications, spatiotemporal object modelling, object storage structures and techniques for manipulation of spatiotemporal objects such as multidimensional indexing, data structures, query evaluation strategies and architectures for spatiotemporal database management systems.
We describe a novel neural network architecture, which can recognize human faces with any view in a certain viewing angle range (from left 30 degrees to right 30 degrees out of plane rotation). View-specific eigenface...
详细信息
We describe a novel neural network architecture, which can recognize human faces with any view in a certain viewing angle range (from left 30 degrees to right 30 degrees out of plane rotation). View-specific eigenface analysis is used as the front-end of the system to extract features, and the neural network ensemble is used for recognition. Experimental results show that the recognition accuracy of our network ensemble is higher than conventional methods such as using a single neural network to recognize faces of a specific view.
In this paper, we describe the design and implementation of a portable run-time system for GOP, a graph-oriented programming framework aiming at providing high-bevel abstractions for configuring and programming cooper...
详细信息
ISBN:
(纸本)0769509363
In this paper, we describe the design and implementation of a portable run-time system for GOP, a graph-oriented programming framework aiming at providing high-bevel abstractions for configuring and programming cooperative parallel processes. The runtime system provides an interface with a library of programming primitives to the low-level facilities required to support graph-oriented communications and synchronization. The implementation is on top of the Parallel Virtual Machine (PVM) in a local area network of Sun workstations. Issues related to the implementation of graph operations in a distributed environment are discussed. Performance of the runtime system is evaluated by estimating the overheads associated with using GOP primitives as opposed to PVM.
In this paper, the relationship between the second order typed - calculus 2 and its higher order version is discussed . A purely syntactic proof of the conservativity of over 2 is given.
In this paper, the relationship between the second order typed - calculus 2 and its higher order version is discussed . A purely syntactic proof of the conservativity of over 2 is given.
暂无评论