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The increasing demand for secure interactions between network domains brings in new challenges to access control technologies. In this paper we design an access control framework which provides a multilevel mapping method between hierarchical access control structures for achieving multilevel security protection in cross-domain networks. Hierarchical access control structures ensure rigorous multilevel...
This paper demonstrates the design of inter database retrieval system based on Multi-Agent. Interface agent, cooperation agent, collection agent, retrieval agent are used to realize intelligence in this system. A mobile agent is adopted to communicate with other agents. They coordinate with each other to complete retrieval tasks. The system is an important research project in the field of Web database...
For large data-set, the speed of algorithms for support vector machines is one restriction for their performances; besides, noise and outliers which the data-set contained also influenced their capabilities greatly. This paper proposes an effective method for weighted support vector regression (SWSVR): the simplification of the original samples (contain noise and outliers) is taken firstly; then,...
The basic theory and the key algorithm about GVF snake model are presented firstly. Then a lot of important experiments are done to achieve the effect of the GVF snake segmentation about stomach epidermis tumors after having set the values of some important parameters in GVF snake model. Firstly, the effect of two kinds image pretreatment processing such as the edge mapping and the Gauss blur are...
As grid technologies evolve quickly on Internet, research related to resource allocation and task scheduling faces new opportunities and challenges. These new technologies, ideas and approaches provide a new environment for researching and developing load balancing-oriented job scheduling system. Aiming at the hierarchical grid model structure, following statistical thinking, this paper proposed a...
Many content-based 3D model retrieval techniques have been proposed in the last decade. Compared with other methods, light field descriptor (LFD) is generally acknowledged as the best model representation. Taking LFD as example, we analyze the disadvantage of the model descriptors based on visual similarity and propose a modified descriptor which preserves the exact geometrical features of the model...
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