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Tree structures are used extensively in domains such as computational biology, pattern recognition, XML databases, computer networks , and so on. One important problem in mining databases of trees is to find frequently occurring subtrees. However, because of the combina-torial explosion, the number of frequent subtrees usually grows exponentially with the(More)
—Tree structures are used extensively in domains such as computational biology, pattern recognition, XML databases, computer networks, and so on. One important problem in mining databases of trees is to find frequently occurring subtrees. Because of the combinatorial explosion, the number of frequent subtrees usually grows exponentially with the size of(More)
Gait variability reflects important information for the maintenance of human beings’ health. For pathological populations, changes in gait variability signal the presence of abnormal motor control strategies. Quantitative analysis of the altered gait variability in patients with amyotrophic lateral sclerosis (ALS) will be helpful for either diagnosing or(More)
Bioinformatics has become an active research area in recent years. The amount of mapped sequences doubles every fourteen months. BLAST has been widely employed for retrieving sequences which has similar portion(s) to a given sequence. However, BLAST has to scan the entire database every time when a query is issued. This can be very time consuming especially(More)
S-adenosyl-L-methionine (SAM) is an essential metabolite in all living cells, and which plays an important role in cellular functions such as methylation, sulfuration, and polyamine synthesis. The current study was carried out to obtain an industrial strain with overproduction of SAM. The wild-type strain, Saccharomyces cerevisiae CGMCC 1226, was subjected(More)