Measuring the similarity between 3D models is a fundamental task in 3D models retrieval. In this paper, we propose a new method based on global geometric feature map (GGFM) to represent arbitrary polygonal 3D models. ...
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Measuring the similarity between 3D models is a fundamental task in 3D models retrieval. In this paper, we propose a new method based on global geometric feature map (GGFM) to represent arbitrary polygonal 3D models. Since 3D polygonal model can be expressed as a set of facets, the GGFM can fast constitute a spherical histogram about the normal orientation and area and position of every facet on the surface of the model. By computing the spherical correlation between the GGFMs of the matched models, similarity of two models can be obtained. Experimental results show that the proposed method performs well in 3D model similarity matching and is invariant to the translation and rotation and scaling of 3D model. Comparing to the existing methods, this method is fast and needs low computation and storage cost since each facet of the model needs to be computed only once in GGFM
The Time-Domain Finite Element Method is used extensively in areas of microwave engineering. However, TD-FEM runs too slow for some simulations to be practical, especially when run on standard personal computers. The ...
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ISBN:
(纸本)1424401623
The Time-Domain Finite Element Method is used extensively in areas of microwave engineering. However, TD-FEM runs too slow for some simulations to be practical, especially when run on standard personal computers. The propriety of hardware for the acceleration of TD-FEM computations has been investigated. It is well known that the key of TD-FEM is matrix operation. There always be an obstacle that the speedup of dense matrices operations in graphics Processor Units fields. This situation will be improved in next generation. Even though the presence of the obstacle, the standard consumer graphics Processor Units (GPUs) can be used to accelerate TD-FEM simulations by a factor of close to two yet, relative to an Intel CPU of similar technology generation. With OpenGL as the Application Programming Interface (API), a standard commercial graphics card has been programmed to solve a 2-D electromagnetic radiation problem.
We present a new generic problem solving approach for over-constrained problems based on Max-SAT. We first define a Boolean clausal form formalism, called soft CNF formulas, that deals with blocks of clauses instead o...
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One research direction to make computers become more active machines is to use audio input with far-field omni-directional microphones, these being required to face the acoustics problem of the meeting scenario. This ...
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One research direction to make computers become more active machines is to use audio input with far-field omni-directional microphones, these being required to face the acoustics problem of the meeting scenario. This topic is not only interesting from an artificial listener point-of-view, but also as one of the hottest topics in searchable media. In this paper two noise suppression methods for real meeting audio are evaluated. Because of the usage of hands-free microphones in a meeting environment, the reverberation of meeting rooms and background noise sources such as projector, computer fan have huge impact on speech quality. Two denoising methods, based on statistical Wavelet filtration and short-time Fourier transform are discussed and evaluated. Whilst the quantile technique is suitable for estimating stationary noise (beamer, computer fan), non-stationary sources (closing door, chair movement) can be handled by recursive structure and adaptive temporal gain of the statistical filtration method. Besides, frequency non-linear gain can remove colored noise effectively. The proposed noise reduction methods are evaluated with speaker localizing application applied on the meeting database of the Mistral project. The results show the pros and cons of each method applied on the meeting database.
We develop sub-100-nm resist patterns with alternating phase shift mask (alt PSM) using 0.68 numerical aperture KrF lithography scanner at a partial coherence factor σ of 0.31, the lowest available in our tool - a ne...
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SVG (scalable vector graphic) is used to describing 2D graphics in XML, which is a text file in fact. SVG has many advantages facing to Web application, such as dynamically showing data and interactivity. As increasin...
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ISBN:
(纸本)1424406048
SVG (scalable vector graphic) is used to describing 2D graphics in XML, which is a text file in fact. SVG has many advantages facing to Web application, such as dynamically showing data and interactivity. As increasing usage of SVG graphics in commercial Web applications for exchanging or publishing data, unauthorized duplication and distribution of SVG data become a mandatory concern for many Web applications. Then how to fulfil copyright protection must be deal with carefully. In this paper, we propose a scheme to protect the copyright of the SVG data based on digital watermark
In this paper, we present a novel approach for parallel sorting on stream processing architectures. It is based on adaptive bitonic sorting. For sorting n values utilizing p stream processor units, this approach achie...
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ISBN:
(纸本)9781424400546
In this paper, we present a novel approach for parallel sorting on stream processing architectures. It is based on adaptive bitonic sorting. For sorting n values utilizing p stream processor units, this approach achieves the optimal time complexity O((n log n)/p). While this makes our approach competitive with common sequential sorting algorithms not only from a theoretical viewpoint, it is also very fast from a practical viewpoint. This is achieved by using efficient linear stream memory accesses (and by combining the optimal time approach with algorithms optimized for small input sequences). We present an implementation on modern programmable graphics hardware (GPUs). On GPUs, our optimal parallel sorting approach has shown to be remarkably faster than sequential sorting on the CPU, and it is also faster than previous non-optimal sorting approaches on the GPU for sufficiently large input sequences. Because of the excellent scalability of our algorithm with the number of stream processor units p (up to n/log/sup 2/ n or even n/log n units, depending on the stream architecture), our approach profits heavily from the trend of increasing number of fragment processor units on GPUs, so that we can expect further speed improvement with upcoming GPU generations.
In this work, we have demonstrated that the Fermi level pinning in poly-Si/HfO2 can be effectively suppressed by using poly-SiGe gate. Threshold voltage of -1.02 V in poly-Si/HfO2 PFET was tuned to -0.81 V in poly-Si/...
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