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Information Source (other)
Information source may refer to: *Information source (mathematics), a kind of sequence of random variables *Source text, a text (sometimes oral) from which information or ideas are derived * Guide to information sources, a kind of "metabibliography". Ideally it is not just a listing of bibliographies, reference works and other source texts, but more like a textbook introducing users to the information sources in a given field (in general). * , a grapheme used to indicate the existence of an information sign, information board or to highlight other information in a manual {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Source (mathematics)
In mathematics, an information source is a sequence of random variables ranging over a finite alphabet Γ, having a stationary distribution. The uncertainty, or entropy rate, of an information source is defined as :H\ = \lim_ H(X_n , X_0, X_1, \dots, X_) where : X_0, X_1, \dots, X_n is the sequence of random variables defining the information source, and :H(X_n , X_0, X_1, \dots, X_) is the conditional information entropy of the sequence of random variables. Equivalently, one has :H\ = \lim_ \frac. See also * Markov information source * Asymptotic equipartition property In information theory, the asymptotic equipartition property (AEP) is a general property of the output samples of a stochastic source. It is fundamental to the concept of typical set used in theories of data compression. Roughly speaking, the th ... References * Robert B. Ash, ''Information Theory'', (1965) Dover Publications. zh-yue:資訊源 Information theory Stochastic processes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source Text
A source text is a text (sometimes oral) from which information or ideas are derived. In translation, a source text is the original text that is to be translated into another language. Description In historiography, distinctions are commonly made between three kinds of source texts: Primary Primary sources are firsthand written evidence of history made at the time of the event by someone who was present. They have been described as those sources closest to the origin of the information or idea under study."Library Guides: Primary, secondary and tertiary sources" These types of sources have been said to provide researchers with "direct, unmediated information about the object of study." Primary sources are sources which, usually, are recorded by someone who participated in, wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guide To Information Sources
A guide is a person who leads travelers, sportspeople, or tourists through unknown or unfamiliar locations. The term can also be applied to a person who leads others to more abstract goals such as knowledge or wisdom. Travel and recreation Explorers in the past venturing into territory unknown by their own people invariably hired guides. Military explorers Lewis and Clark were hired by the United States Congress to explore the Pacific Northwest. They in turn hired the better qualified Native American Sacagawea to help them. Wilfred Thesiger hired guides in the deserts that he ventured into, such as Kuri on his journey to the Tibesti Mountains in 1938. Tour guide Tour guides lead visitors through tourist attractions and give information about the attractions' natural and cultural significance. Often, they also act as interpreters for travelers who do not speak the local language. Automated systems like audio tours are sometimes substituted for human tour guides. Tour operators ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |