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3 天前 · Wireless network technologies. In telecommunications, 5G is the fifth-generation technology standard for cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the successor to 4G technology that provides connectivity to most current mobile phones. Like its predecessors, 5G networks are cellular networks, in ...
2 天前 · Ayatollah Ruhollah Musavi Khomeini [b] (17 May 1900 or 24 September 1902 [a] – 3 June 1989) was an Iranian Islamic revolutionary, politician, and religious leader who served as the first supreme leader of Iran from 1979 until his death in 1989.
2 天前 · Angela Dorothea Merkel ( German: [aŋˈɡeːla doʁoˈteːa ˈmɛʁkl̩] ⓘ; [a] née Kasner; born 17 July 1954) is a retired German politician and chemist who served as Chancellor of Germany from 2005 to 2021 and was the first woman to hold that office. She previously served as Leader of the Opposition from 2002 to 2005 and as Leader of the ...
2 天前 · Probability theory. In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is. The parameter is the mean or expectation of the distribution (and also its median and mode ), while ...
6 天前 · United Nations. ^ The headquarters were based from 1 November 1920 in the Palais Wilson in Geneva, Switzerland, and from 17 February 1936 in the purpose built Palace of Nations, also in Geneva. The League of Nations ( French: Société des Nations [sɔsjete de nɑsjɔ̃]) was the first worldwide intergovernmental organisation whose principal ...
3 天前 · Maya Angelou ( / ˈændʒəloʊ / ⓘ AN-jə-loh; [1] [2] born Marguerite Annie Johnson; April 4, 1928 – May 28, 2014) was an American memoirist, poet, and civil rights activist. She published seven autobiographies, three books of essays, several books of poetry, and is credited with a list of plays, movies, and television shows spanning over 50 years.
2 天前 · Ayn Rand. Alice O'Connor (born Alisa Zinovyevna Rosenbaum; [c] February 2 [ O.S. January 20], 1905 – March 6, 1982), better known by her pen name Ayn Rand ( / aɪn / EYEN ), was a Russian-born American author and philosopher. [3] She is known for her fiction and for developing a philosophical system she named Objectivism.
