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1 天前 · The beginning of Aristotle's Metaphysics, one of the foundational texts of the discipline Metaphysics is the branch of philosophy that examines the basic structure of reality. It is often characterized as first philosophy, implying that it is more fundamental than other forms of philosophical inquiry. Metaphysics is traditionally seen as the ...
1 天前 · Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei (/ ˌ ɡ æ l ɪ ˈ l eɪ oʊ ˌ ɡ æ l ɪ ˈ l eɪ / GAL-il-AY-oh GAL-il-AY, US also / ˌ ɡ æ l ɪ ˈ l iː oʊ-/ GAL-il-EE-oh - , Italian: [ɡaliˈlɛːo ɡaliˈlɛːi]) or simply Galileo, was an Italian astronomer, physicist and engineer, sometimes described as a polymath.
1 天前 · Definition The Fourier transform is an analysis process, decomposing a complex-valued function () into its constituent frequencies and their amplitudes. The inverse process is synthesis, which recreates () from its transform.We can start with an analogy, the Fourier series, which analyzes () on a bounded interval [/, /], for some positive real number .
1 天前 · The narwhal (Monodon monoceros), is a species of toothed whale, and the only member of the genus Monodon.Its closest living relative is the beluga whale, and cases of interbreeding between the two species has been recorded. It is sexually dimorphic, as adult males are larger than females and have a long single tusk that can be up to 3 m (9.8 ft).
1 天前 · Recorded 4 October 1994. Nelson Rolihlahla Mandela ( / mænˈdɛlə / man-DEH-lə; [1] Xhosa: [xolíɬaɬa mandɛ̂ːla]; born Rolihlahla Mandela; 18 July 1918 – 5 December 2013) was a South African anti-apartheid activist, politician, and statesman who served as the first president of South Africa from 1994 to 1999. He was the country's ...
1 天前 · Chinese New Year or the Spring Festival (see also Names) is a festival that celebrates the beginning of a new year on the traditional lunisolar Chinese calendar.Marking the end of winter and the beginning of spring, observances traditionally take place from Chinese New Year's Eve, the evening preceding the first day of the year, to the Lantern Festival, held on the 15th day of the year.
1 天前 · Portugal, officially the Portuguese Republic, is a country located on the Iberian Peninsula, in Southwestern Europe, and whose territory also includes the Macaronesian archipelagos of the Azores and Madeira.It features the westernmost point in continental Europe, its mainland west and south border with the North Atlantic Ocean and in the north and east, the Portugal-Spain border constitutes ...
