1 Motiv Ation
نویسنده
چکیده
Web mining is the use of data mining techniques to automatically discover and extract information from World Wide Web documents and services ( e.g., on-line travel agents, job listings, electronic malls, etc. ) .This article considers the question: is effective Web mining possible? Skeptics believe that the Web is too unstructured for Web mining to succeed. Indeed, data mining has been applied to databases traditionally, yet much of the information on the Web lies buried in documents designed for human consumption such as home pages or product catalogs. Furthermore, much of the information on the Web is presented in natural language text with no machine-readable semantics; HTML annotations structure the display of Web pages, but provide little insight into their content. Some have advocated transforming the Web into a massive layered database to facilitate data mining[12], but the Web is too dynamic and chaotic to be tamed in this manner. Others have attempted to hand code site-specific "wrappers" that facilitate the extraction of information from individual Web resources ( e.g., [8]). Hand coding is convenient but cannot keep up with the explosive growth of the Web. As an alternative, this article argues for the:
منابع مشابه
Effect of Polymer Concentr ation on the Structure and Performance of Polysulf one Flat Membrane for CO 2 Absorption in Membrane Contactor
متن کامل
Disagreeable narcissism mediates an effect of BAS on addictive behaviors
Some forms of personality dysfunction that are associated with substance use and other externalizing behaviors, such as Narcissistic Personality Disorder, are characterized by low five-factor Agreeableness . Low Agreeableness and high Extraversion are both associated with the Behavioral Approach System in the revised Reinforcement Sensitivity Theory of Personality (RST; McNaughton & Corr, 2008 ...
متن کاملEscaping from a Liquidity Trap and Deflation: The Foolproof Way and Others
I n the last decade or two, central banks all over the world have been quite successful in achieving low and stable in ation. Average annual in ation in the industrialized countries has fallen below 2 percent. Average in ation has not been so low since the 1950s, as shown in Table 1. In emerging countries, in ation is now the lowest since the 1960s (International Monetary Fund, 2003b). Thes...
متن کاملPrice Setting during Low and High Ination: Evidence from Mexico
This paper provides new insight into the relationship between ination and consumer price setting by examining a large data set of Mexican consumer prices covering episodes of both low and high ination, as well as the transition between the two. The overall portrait is one in which the economy shares several characteristics of time dependent models when the annual ination rate is low (below 1...
متن کامل