Vertical Search Engine Research, And Implementation

With the geometrically increasing of network information resources, it has become more difficult to find the required information accurately and rapidly by using general search engine. Face to the not fast enough and bot deeply enough defects of general search engine, the vertical search engine came into being.The vertical search engine is a professional search engine; it's the subdivision and extension of general search engine; it provides some useful information or certain services for a particular area,a specific group or a particular demand. It's not to provide users with hundreds or even thousands of relevant pages, but the range extremely narrow, highly targeted specific information. The main contents:First of all, introduced the history of search engines and future development trends;Secondly, the introduction of the key technologies of vertical search engines and do some innovative work;1.The setup of Four-Layer Web Structure Model. Thus creating a way to retrieve the path of the focused crawler crawler device.2. The Proposition of combinating wrapper and web feature based web information extraction methods. First, the theme with a wrapper to extract the contents of the block, then according to the source page features the full realization of the theme selected block.3. the design and implementation of a dictionary. Through the study of Chinese word, the design and implementation of a professional driver for notebook computer dictionary.4.The design and implementation of URL Collection System. In order to find the driver download large portal sites. 5. The setup of download the number of movements of the sorting algorithm, and on the search results list keywords by Miao Hong technology.Finally, each subsystem was designed and implemented for notebooks driver download vertical search engine prototype system. Compared by testing the search engines and general search engine search results, verify the vertical search engine, intuitive relative advantages of general search engines and research significance.