搜尋結果
5 天前 · Principal component analysis (PCA) is a linear dimensionality reduction technique with applications in exploratory data analysis, visualization and data preprocessing. The data is linearly transformed onto a new coordinate system such that the directions (principal components) capturing the largest variation in the data can be easily identified.
5 天前 · Leo Tolstoy at age 20, c. 1848. Tolstoy was born at Yasnaya Polyana, a family estate 12 kilometres (7.5 mi) southwest of Tula, and 200 kilometres (120 mi) south of Moscow. He was the fourth of five children of Count Nikolai Ilyich Tolstoy (1794–1837), a veteran of the Patriotic War of 1812, and Princess Mariya Tolstaya (née Volkonskaya; 1790 ...
2024年5月31日 · The "Third Chinese Empire" (中華第三帝國) consisted of the Liao dynasty, the Jin dynasty, the Yuan dynasty, the Ming dynasty, and the Qing dynasty. Accordingly, the terms "Chinese Empire" and "Empire of China" need not necessarily refer to imperial dynasties that had unified China proper.
6 天前 · The Burj Khalifa has been classified as megatall. [2] A diagram showing the tallest buildings as of 2024. This is a list of the tallest buildings. Tall buildings, such as skyscrapers, are intended here as enclosed structures with continuously occupiable floors and a height of at least 340 metres (1,120 ft).
3 天前 · James Earl Carter Jr. (born October 1, 1924) is an American politician and humanitarian who served as the 39th president of the United States from 1977 to 1981. A member of the Democratic Party, Carter was the 76th governor of Georgia from 1971 to 1975, and a Georgia state senator from 1963 to 1967.
2024年5月30日 · The term sustainability is derived from the Latin word sustinere. "To sustain" can mean to maintain, support, uphold, or endure. So sustainability is the ability to continue over a long period of time. In the past, sustainability referred to environmental sustainability. It meant using natural resources so that people in the future could continue to rely on them in the long term. The concept ...
5 天前 · C. S. Lewis. Clive Staples Lewis FBA (29 November 1898 – 22 November 1963) was a British writer, literary scholar, and Anglican lay theologian. He held academic positions in English literature at both Magdalen College, Oxford (1925–1954), and Magdalene College, Cambridge (1954–1963). He is best known as the author of The Chronicles of ...
