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Sol–gel methods and organic and inorganic precursors of titania were used for preparation of the monolithic catalysts, Rh/TiO 2 . Techniques, such as X-ray diffraction, porosimetry, temperatured programmed reduction, scanning electron microscopy, and X-ray photoelectron spectroscopy, were utilized to characterize the monolithic catalysts. Results of the short contact-time partial oxidation...
This paper presents a blind robust digital image watermarking scheme based on singular value decomposition in wavelet domain for copyright protection. The proposed algorithm inserts bits of singular values of the watermark image in the wavelet coefficients of the host image. In the first step, the wavelet coefficients of each sub-band of the transformed image are grouped into 2×2 blocks. These blocks...
In this paper we introduce a new method for source identification in digital image forensics. The proposed method uses local information of the inherent pattern of the camera, as a signature of the camera for source identification. Here the sensor pattern noise is used as the unique identification property of the camera. However due to content dependency of the denoising algorithms that are used to...
As a result of the rapid growth and dynamic content of the web, the general purpose web search engines are becoming deficient. Although the meta-search engines can help by increasing the search coverage of the web, the large number of irrelevant results returned by a meta-search engine is still causing problems for the users. The personalization of meta-search engines overcomes this problem by filtering...
The traffic congestion problem in urban areas is worsening since traditional traffic signal control systems cannot provide efficient traffic control. Therefore, dynamic traffic signal control in intelligent transportation system (ITS) recently has received increasing attention. This study devised an adaptive and cooperative multi-agent fuzzy system for a decentralized traffic signal control. To achieve...
This paper presents a multiresolution image segmentation method based on the discrete wavelet transform and Markov random field (MRF) modeling. A major contribution of this work is to add spatial scalability to the segmentation algorithm producing the same segmentation pattern at different resolutions. This property makes it applicable for scalable object-based wavelet coding. The correlation between...
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