Remote sensing images are hard to achieve high compression ratio because of their rich texture. By analyzing the influence of wavelet properties on image compression, this paper proposes wavelet construction rules and...
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Remote sensing images are hard to achieve high compression ratio because of their rich texture. By analyzing the influence of wavelet properties on image compression, this paper proposes wavelet construction rules and builds a new biorthogonal wavelet construction model with parameters. The model parameters are optimized by using genetic algorithm and adopting energy compaction as the optimization object function. In addition, in order to resolve the computation complexity problem of online construction, according to the image classification rule proposed in this paper we construct wavelets for different classes of images and implement the fast adaptive wavelet selection algorithm （FAWS）. Experimental results show wavelet bases of FAWS gain better compression performance than Daubechies9/7.
None-visible data modeling and representation is one of the key topics in virtualreality, since it greatly affects the sense of the user. In this paper we present how to visualize none-visible data in the virtual env...
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None-visible data modeling and representation is one of the key topics in virtualreality, since it greatly affects the sense of the user. In this paper we present how to visualize none-visible data in the virtual environment and a toolkit called synthetic information visualization platform (SIVP) is given. This toolkit includes two processes and the main components of SIVP are described. Finally, we demonstrate some works based on SIVP
ChinaGrid provides the nationwide grid computing platform and services for education and research purpose among 100 key universities in China. University digital museum grid (UDMGrid) is one of the most important appl...
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ChinaGrid provides the nationwide grid computing platform and services for education and research purpose among 100 key universities in China. University digital museum grid (UDMGrid) is one of the most important applications of ChinaGrid which aims at offering one-stop information services about kinds of digital specimens from several university digital museums in the form of grid services. During last 3 years, many versions of UDMGrid have been developed. This paper describes the progress of UDMGrid and presents key technologies of the current version such as ontology, Grid-DAI and grid monitoring. Finally, the workflow of UDMGrid is given
Workflow management technologies play a very important role in constructing grid application environment by automating service composition and execution. With the fast spread of grid technology, workflow management sy...
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Workflow management technologies play a very important role in constructing grid application environment by automating service composition and execution. With the fast spread of grid technology, workflow management system should be flexible to meet increasing requirements of service composition. This paper introduces a distributed workflow management approach DWM4CGSP named distributed workflow management for CGSP, which can improve capability of workflow execution by dynamically assimilating new workflow engines and balancing workload among these engines. Moreover dynamic load balancing is applied in DWM4CGSP in order to make workload on each engine at reasonable level. Finally an implementation demonstrates that DWM4CGSP works well in CGSP and can be further extended to other similar grids
To allow geographical dispersed engineers to perform an assembly task together, a virtual environment for collaborative assembly (VECA) has been developed to build a typical collaborative virtual assembly system. This...
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ISBN:
(纸本)0769525121
To allow geographical dispersed engineers to perform an assembly task together, a virtual environment for collaborative assembly (VECA) has been developed to build a typical collaborative virtual assembly system. This presents the key parts of VECA, such as system architecture, HLA-based (high level architecture) communication and collaboration, motion guidance based on collision detection and assembly constraints recognition, data translation from CAD to virtual environment, reference resolution in multimodal interaction.
Presents a biography of Fessenden and his contribution to radio broadcasting and science, during the period from the late 1870s up to his death in 1932.
Presents a biography of Fessenden and his contribution to radio broadcasting and science, during the period from the late 1870s up to his death in 1932.
Because the eighteen online university digital museums of China confront a problem that the multi-discipline resources at these digital museums are isolated and dispersed without sufficient interconnection, ChinaGrid ...
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