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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)
With the prevalence of SOA, an increasing number of Web services are created and composed to construct complex business processes. Selecting an appropriate service from a lot of independently developed services which have the same functionality but different QoS properties is essential for the effect of the composite service according to users' preference.(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)
Services are the basic amass that aims to support the building of business application in a more flexible and interoperable manner for enterprise collaboration. Satisfying the needs of service consumer and to become accustomed to changing needs, service composition is performed to compose the various capabilities of available services. With the(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)