In recent years, grid technology is more and more popular to design e-government in domestic and foreign. This paper analyses the characters of grid technology, proposes the framework of e-government based on grid tec...
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In recent years, grid technology is more and more popular to design e-government in domestic and foreign. This paper analyses the characters of grid technology, proposes the framework of e-government based on grid technology, and lists the key problems in implementation.
Mining frequent sub tree from databases of labeled trees is a new research field that has many practical applications in areas such as computer networks, Web mining, bioinformatics, XML document mining, etc. These app...
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Mining frequent sub tree from databases of labeled trees is a new research field that has many practical applications in areas such as computer networks, Web mining, bioinformatics, XML document mining, etc. These applications share a requirement for the more expressive power of labeled trees to capture the complex relations among data entities. In this paper an efficient algorithm is introduced for mining frequent, ordered, embedded sub tree in tree-like databases. Using a new data structure called scope-list, which is a canonical representation of tree node, the algorithm first generates all candidate trees, then enumerates embedded, ordered trees, finally joins scope-list to compute frequency of embedded ordered trees. Experiments show the performance of the algorithm is about 15% better than other similar mining methods and has good scale-up properties.
Briefly introduced the concept and features of multicast, from the enterprise actual demand for multicast application, discussed the advantage of multicast in relation to unicast, from the multicast address selection,...
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Briefly introduced the concept and features of multicast, from the enterprise actual demand for multicast application, discussed the advantage of multicast in relation to unicast, from the multicast address selection, multicast membership management, multicast routing technology, multicast traffic management and other aspects, discussed the implementation of IP multicast technology. By an actual business needs, completed the expansion of IP multicast in the enterprise, given specific methods to empolder multicast network and implement multicast application from the perspective of practice.
Semantic conflicts may appear in the process of weaving aspects in the aspect-oriented program. This paper proposes an approach to check such semantic conflicts based on the concept of behavioral subtyping, and presen...
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Semantic conflicts may appear in the process of weaving aspects in the aspect-oriented program. This paper proposes an approach to check such semantic conflicts based on the concept of behavioral subtyping, and presents the conditions of behavioral subtyping. Through extracting the preconditions and postconditions defined in the base program and aspects, then automatically transforming them into the code to check conditions of behavioral subtyping, consequently it achieves checking of semantic conflicts, and guarantees correctness of the program's behavior after weaving aspects. These codes for checking semantic conflicts are implemented by using aspects, and the implementation method is explained through an example.
This paper presents a new hybrid algorithm model, i.e., the improved particle swarm optimization algorithm to optimize the weights value and threshold values of BP neural network. The improved particle swarm optimizat...
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This paper presents a new hybrid algorithm model, i.e., the improved particle swarm optimization algorithm to optimize the weights value and threshold values of BP neural network. The improved particle swarm optimization algorithm employs parameter with crossover operator and mutation operator to significantly improve the performance of the original particle swarm algorithm optimization in global search and fine-tuning of the solutions. Then this model is applied into the lithology recognition. The results demonstrate that this model has significant advantages inspect of fast convergence speed, good generalization ability and not easy to yield minimal local results.
Opposed-exciting thermoacoustic refrigerator (TAR) is a new type micro-refrigerator, whose physical dimension can be reduced by the increasing of working frequency. It is very important for such an equipment to contro...
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The management problem of geospatial information becomes the hotspot because of the high-speed development of geospatial information related industry. This paper looking at the problem from the angle as distributed Ge...
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The management problem of geospatial information becomes the hotspot because of the high-speed development of geospatial information related industry. This paper looking at the problem from the angle as distributed Geocomputing, and studies on the distributed management and publishing mechanisms of massive geospatial information. There the collaboration mechanism of distributed nodes and the database-based storage and management strategy of massive geospatial information are proposed. The system performance and data access efficiency could be enhanced through collaborating between distributed nodes. Moreover, the complexity and heterogeneities between different data could be shielded by spatial database engine technology, which provides a uniform interface for data access on database. A prototype system has been implemented. Tests show that this system has favorable performance on data access, which could be a reliable data support for the upper geospatial information applications.
Briefly introduced the concept and features of multicast, from the enterprise actual demand for multicast application, discussed the advantage of multicast in relation to uni cast, from the multicast address selection...
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Briefly introduced the concept and features of multicast, from the enterprise actual demand for multicast application, discussed the advantage of multicast in relation to uni cast, from the multicast address selection, multicast membership management, multicast routing technology, multicast traffic management and other aspects, discussed the implementation of IP multicast technology. By an actual business needs, completed the expansion of IP multicast in the enterprise, given specific methods to empolder multicast network and implement multicast application from the perspective of practice.
In recent years, grid technology is more and more popular to design e-government in domestic and foreign. This paper analyses the characters of grid technology, proposes the framework of e-government based on grid tec...
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In recent years, grid technology is more and more popular to design e-government in domestic and foreign. This paper analyses the characters of grid technology, proposes the framework of e-government based on grid technology, and lists the key problems in implementation.
This brief is concerned with robust Kalman filtering for wireless sensor networks with delayed measurements, where packet-drop also occurs. The norm-bounded parameter uncertainties enter into both the system matrix an...
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This brief is concerned with robust Kalman filtering for wireless sensor networks with delayed measurements, where packet-drop also occurs. The norm-bounded parameter uncertainties enter into both the system matrix and the input matrix of the state space model. The approach of re-organization of measurements is proposed to improve the efficiency of computation. A sufficient and necessary condition for the existence of a robust Kalman filter for wireless sensor networks system is derived.
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