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Denormalization is a common tactic for enhancing performance of data warehouses, though its side-effect is quite obvious. Besides being confronted with update abnormality, denormalization has to consume additional storage space. As a result, this tactic is rarely used in main memory databases, which regards storage space, i.e., RAM, as scarce resource. Nevertheless, our research reveals that main...
In this paper, we propose a sensor array consisting of multiple quartz crystal microbalances (QCMs) surrounded by phononic crystals. Phononic crystals are utilized for isolating acoustic energy of individual bulk acoustic wave sensor and suppressing the interference. The resonance response of a QCM was calculated by finite element analysis. A square-lattice phononic crystal structure was designed...
The number of defect pixels in solid state image sensor grows as the digital imagers continue increasing in image size and pixel density. However, limited number of defect pixels is usually allowed after detection and correction techniques are applied. The defect pixel detection and defect pixel correction are operated separately but the former must employ before the latter is in use. Without an excellent...
The contents of the Huffman tables for JPEG coding might varied from one image to another. To ensure that the JPEG decoder uses the same Huffman tables as the encoder did, the JPEG standard suggests a method for encoder to downsize the Huffman tables and save them in file header so that the decoder can restore them from the header. Table restoration is time consumed because of the huge AC Huffman...
Connected component labeling is an indispensable and one of most time consuming tasks of the applications in computer vision. Many labeling algorithms have been introduced, such as scan plus connection table, scan plus union-find, and contour tracing etc. They would rather use byte data than bit data to represent the binary pixel, which is either 1 or 0, due to the heavy cost of bitwise operations...
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