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3 天前 · UTF-8 is a variable-length character encoding standard used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode Transformation Format – 8-bit. [1] UTF-8 is capable of encoding all 1,112,064 [a] valid Unicode code points using one to four one- byte (8-bit) code units.
2024年5月29日 · First released in 1985 as an extension of the C programming language, it has since expanded significantly over time; as of 1997, C++ has object-oriented, generic, and functional features, in addition to facilities for low-level memory manipulation for making things like microcomputers or to make operating systems like Linux or Windows.
3 天前 · Human papillomavirus infection ( HPV infection) is caused by a DNA virus from the Papillomaviridae family. [5] . Many HPV infections cause no symptoms and 90% resolve spontaneously within two years. [1] . In some cases, an HPV infection persists and results in either warts or precancerous lesions. [2] .
1 天前 · The standard deviation of a random variable, sample, statistical population, data set, or probability distribution is the square root of its variance. It is algebraically simpler, though in practice less robust, than the average absolute deviation.
1 天前 · Established in 1936, Unit 731 was responsible for some of the most notorious war crimes which were committed by the Japanese armed forces. Internally, it dehumanized the people who it routinely conducted tests on by referring to them as "logs".
5 天前 · The number π ( / paɪ /; spelled out as " pi ") is a mathematical constant that is the ratio of a circle 's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics.
3 天前 · Overview. USB was designed to standardize the connection of peripherals to personal computers, both to exchange data and to supply electric power. It has largely replaced interfaces such as serial ports and parallel ports and has become commonplace on a wide range of devices.
