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1 天前 · Franklin Delano Roosevelt[a] (January 30, 1882 – April 12, 1945), commonly known by his initials FDR, was an American statesman and politician who served as the 32nd president of the United States from 1933 until his death in 1945. He was a member of the Democratic Party and is the only U.S. president to have served more than two terms. His ...
- Herbert H. Lehman
- Woodrow Wilson
3 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 .
4 天前 · Thomas Jefferson (April 13, 1743[b] – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809.[6] He was the primary author of the Declaration of Independence. Following the American Revolutionary War and prior to becoming ...
5 天前 · IPA. [fɔːŋ˩ siː˨ loŋ˩] Chan Kong-sang [a] SBS MBE PMW [3] (born 7 April 1954), known professionally as Jackie Chan, [b] [4] [2] [1] is a Hong Kong [5] [6] actor, director, writer, producer, martial artist, and stuntman known for his slapstick acrobatic fighting style, comic timing, and innovative stunts, which he typically performs himself.
4 天前 · Sumer (/ ˈ s uː m ər /) is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during the Chalcolithic and early Bronze Ages between the sixth and fifth millennium BC. Like nearby Elam, it is one of the cradles of civilization, along with Egypt, the Indus Valley, the Erligang culture of the Yellow River valley, Caral ...
4 天前 · Jacqueline Kennedy Onassis. Jacqueline " Jackie " Lee Kennedy Onassis ( née Bouvier / ˈbuːvieɪ /; July 28, 1929 – May 19, 1994) was an American writer, book editor, and socialite who served as the first lady of the United States from 1961 to 1963, as the wife of President John F. Kennedy. A popular first lady, she endeared the American ...
1 天前 · George Washington (February 22, 1732 – December 14, 1799) was an American Founding Father, military officer, and politician who served as the first president of the United States from 1789 to 1797. Appointed by the Second Continental Congress as commander of the Continental Army in 1775, Washington led Patriot forces to victory in the American Revolutionary War and then served as president ...
