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Vector quantization (VQ) is an important method of lossy image compression. The basic prerequisite of VQ is that the codebook must have representability to ensure the quality of the recovery image. In this paper, we propose a new codebook design approach using genetic algorithm. Our method will split a gray-level image into blocks of 4*4 size and simplify these blocks to enhance the representability...
Personalized curriculum sequencing is an important research issue for web-based learning systems because no fixed learning paths will be appropriate for all learners. Therefore, many researchers focused on developing e-learning systems with personalized learning mechanisms to assist online web-based learning and adaptively provide learning paths in order to promote the learning performance of individual...
TF-IDF formula can represent effectively the text characteristics; the immunity system (TIS) has many characteristics, including the distributional protection, multiplicity, auto-adapted in the information processing, it is robust and expansibility, memory ability, fault-tolerant ability, dynamic stability as well as exceptionally examines. The paper analyzes characteristics of many illegal emails...
The fuzzy logic controller is widely used in many control applications. The advantages of using fuzzy logic controller are that the fuzzy logic controller can extract the control strategy from experts. Also, the linguistic control rules of fuzzy controller are fit for human's thought. However, a primary drawback of the fuzzy logic controller is that the linguistic control rules are hard to generate...
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