- In digital computing and telecommunications, a unit of information is the capacity of some standard data storage system or communication channel, used to measure the capacities of other systems and channels. In information theory, units of information are also used to measure information contained in messages and the entropy of random variables.en.wikipedia.org/wiki/Units_of_information
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The mathematical theory of information is based on probability theory and statistics, and measures information with several quantities of information. The choice of logarithmic base in the following formulae determines the unit of information entropy that is used. The most common unit of information is the bit, or more … 展开
Shannon derived a measure of information content called the self-information or "surprisal" of a message $${\displaystyle m}$$:
where 展开It turns out that one of the most useful and important measures of information is the mutual information, or transinformation. This is a measure of how much information can be … 展开
CC-BY-SA 许可证中的维基百科文本 Units of information - Wikipedia
Several conventional names are used for collections or groups of bits.
Historically, a byte was the number of bits used to encode a character of text in the computer, which depended on computer hardware architecture, but today it almost always means eight bits – that is, an octet. An 8-bit byte can represent 256 (2 ) distinct values, such as non-negative integers from 0 to 255, or signed integers from −128 to 127. The IEEE 1541-2002 standard specifies "B" (u…Wikipedia · CC-BY-SA 许可下的文字- 预计阅读时间：6 分钟
Quantities of information - Wikiwand
网页The mathematical theory of information is based on probability theory and statistics, and measures information with several quantities of information. The choice of logarithmic …
Information theory - Wikipedia
网页Information theory is the mathematical study of the quantification, storage, and communication of information. Learn about its origins, key measures, applications, and …
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Information theory - Wikiversity
网页2022年1月8日 · Quantities of information are relevant to a lot of different questions, such as: How many yes/no questions does it take to guess a number between 1 and 3 billion? …
熵与信息量 | hozen.site
网页本文主要结合公式和定义解释了信息熵（Entropy）和信息量（Quantities of information）的含义和联系. 背景. 信息熵是由信息论之父，克劳德·艾尔伍德·香农（Claude Elwood …
Information theory | Definition, History, Examples, & Facts
网页2024年8月30日 · Learn about the mathematical representation of the conditions and parameters affecting the transmission and processing of information, developed by …
Information theory - Simple English Wikipedia, the free encyclopedia
网页Information theory measures the amount of information in data that could have more than one value. In its most common use, information theory finds physical and mathematical …
What is information?† | Philosophical Transactions of …
网页2016年3月13日 · Information is a precise concept that can be defined mathematically, but its relationship to what we call ‘knowledge’ is not always made clear. Furthermore, the concepts ‘entropy’ and ‘information’, while …
Information Quantity - SpringerLink
网页2017年9月20日 · Information Quantity. The question of “how much information” there is in the world goes at least back to the times when Aristotle’s student Demetrius (367 BC – …
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