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A practical shadowing test technique for the trimmed NURBS surface (TNS) is presented in this work. By employing an efficient Bezier patch classification algorithm, a two-level hierarchical space partitioning volume (HSPV) is built for the TNS, where the leaves of the HSPV that contains trimmed off part of the original surface are marked out, making sure the shadowing test occurs on the effective...
High spectral resolution, high spatial resolution and high temporal resolution are the development trend of modern remote sensing technology. In the case of same image data, it is difficult to obtain high spatial resolution and hyperspectral remote sensing data information simultaneously. This weakness can be remedied, the quality of the image can be improved and the useful thematic information also...
Given a video sequence about the road scenarios, discovering the foreground objects and labeling them are crucial. This paper proposes to represent the foreground objects in videos by the bag of words model. The foreground object is treated as a positive document which is a set oi image patches, and the background region is a negative document. Initially the training image patches are sampled and...
Mining investment is a kind of venture capital, the risk level of which is impacted by various factors. There are still a lot of uncertainty and ambiguity in the process of evaluating on mining investment decision, so it is more suitable to use fuzzy evaluation methods for it. The core of fuzzy evaluation is membership degree transformation. But the existing transformation methods should be questioned,...
The core of fuzzy evaluation on the safety of belt conveying system is membership degree transformation. But the existing transformation methods should be questioned, because redundant data in index membership degree is also used to compute object membership degree, which is not useful for object classification. The new algorithm is: using data mining technology based on entropy to mine knowledge...
The core of performance fuzzy evaluation is membership degree transformation. But the transformation methods should be questioned, because redundant data in index membership degree is also used to compute object membership degree, which is not useful for object classification. The new algorithm is: using data mining technology based on entropy to mine knowledge information about object classification...
In any multi-indexes uncertainty decisions, if choosing membership function to describe the uncertainty of every space-index value about some status, it must meet membership degree conversion, which must solve the conversion from membership degree of coordinates to membership degree of points. But the present methods affect the credibility of result of decision because of the redundant data. So, by...
The core of fuzzy evaluation on the safety of chemical industrial park is membership degree transformation. But the transformation methods should be questioned, because redundant data in index membership degree is also used to compute object membership degree, which is not useful for object classification. The new algorithm is: using data mining technology based on entropy to mine knowledge information...
Policy refinement, which is the primary measure to realize the intention of policy-based management, is playing a pivotal role in the management of policy-based distributed systems. Studies on policy refinement are being attached more and more importance to by researchers in recent years. This paper firstly gives an overview of some of the currently leading policy refinement methods, after that, we...
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