A hybrid feature selection method called SU-GA-W is proposed to make full use of advantages of filter and wrapper methods. This method falls into two phases. The filter phase removes features with lower SU and guides the initialization of GA population; the wrapper phase searches the final feature subset. The effectiveness of this algorithm is demonstrated on various data sets.

A typical B-rep describes a solid in its full detail. Operations that locally analyze the B-rep usually process the entire B-rep due to the lack of spatial ordering of its topological entities. For very complex objects, this global processing is time consuming and yet unnecessary. One approach in avoiding the global processing is to use several B-reps of different levels of detail. However, thi...

A substantial subset of the web data follows some kind of underlying structure. Nevertheless, HTML does not contain any schema or semantic information about the data it represents. A program able to provide software applications with a structured view of those semi-structured web sources is usually called a wrapper. Wrappers are able to accept a query against the source and return a set of stru...

There is much interest in systems that automatically interact with Internet information sites. Such systems are hard to build, partly because they use hand-crafted wrappers to extract a site’s content. We advocate wrapper induction, a technique for automatically learning wrappers. Our wrapper induction e_~nvironment (WIEN) enables users quickly capture a set of example page; our wrapper learnin...

Software metrics and fault data are collected during the software development cycle. A typical software defect prediction model is trained using this collected data. Therefore the quality and characteristics of the underlying software metrics play an important role in the efficacy of the prediction model. However, superfluous software metrics often exist. Identifying a small subset of metrics b...

We support exible query processing with autonomous networked information sources. Flexibility allows a query to be accepted in a dynamic environment with unavailable sources. Flexibility provides the ability to identify equivalent sources, based on their contents; these equivalences are used to eliminate redundancy and provide alternate query plans, when some source is unavailable. We determine...

A wide variety of valuable textual information resides on the Web, but very little is in a machineunderstandable form such as XML. Instead, the content is usually embedded in HTML markup or other encodings designed for human consumption. The information extraction task is to automatically populate a database with content gleaned from information sources such as Web pages. Wrappers are an import...